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linux/arch/powerpc/kvm/book3s_emulate.c

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Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2, as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Copyright SUSE Linux Products GmbH 2009
*
* Authors: Alexander Graf <agraf@suse.de>
*/
#include <asm/kvm_ppc.h>
#include <asm/disassemble.h>
#include <asm/kvm_book3s.h>
#include <asm/reg.h>
powerpc/kvm: Fallout from system.h disintegration Add a missing include to fix build Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-04-01 17:35:53 +00:00
#include <asm/switch_to.h>
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
#define OP_19_XOP_RFID 18
#define OP_19_XOP_RFI 50
#define OP_31_XOP_MFMSR 83
#define OP_31_XOP_MTMSR 146
#define OP_31_XOP_MTMSRD 178
KVM: PPC: Implement mtsr instruction emulation The Book3S_32 specifications allows for two instructions to modify segment registers: mtsrin and mtsr. Most normal operating systems use mtsrin, because it allows to define which segment it wants to change using a register. But since I was trying to run an embedded guest, it turned out to be using mtsr with hardcoded values. So let's also emulate mtsr. It's a valid instruction after all. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 10:00:37 +00:00
#define OP_31_XOP_MTSR 210
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
#define OP_31_XOP_MTSRIN 242
#define OP_31_XOP_TLBIEL 274
#define OP_31_XOP_TLBIE 306
#define OP_31_XOP_SLBMTE 402
#define OP_31_XOP_SLBIE 434
#define OP_31_XOP_SLBIA 498
KVM: PPC: Implement mfsr emulation We emulate the mfsrin instruction already, that passes the SR number in a register value. But we lacked support for mfsr that encoded the SR number in the opcode. So let's implement it. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-03-24 20:48:24 +00:00
#define OP_31_XOP_MFSR 595
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
#define OP_31_XOP_MFSRIN 659
KVM: PPC: Add emulation for dcba Mac OS X uses the dcba instruction. According to the specification it doesn't guarantee any functionality, so let's just emulate it as nop. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-03-24 20:48:33 +00:00
#define OP_31_XOP_DCBA 758
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
#define OP_31_XOP_SLBMFEV 851
#define OP_31_XOP_EIOIO 854
#define OP_31_XOP_SLBMFEE 915
/* DCBZ is actually 1014, but we patch it to 1010 so we get a trap */
#define OP_31_XOP_DCBZ 1010
KVM: PPC: Implement alignment interrupt Mac OS X has some applications - namely the Finder - that require alignment interrupts to work properly. So we need to implement them. But the spec for 970 and 750 also looks different. While 750 requires the DSISR and DAR fields to reflect some instruction bits (DSISR) and the fault address (DAR), the 970 declares this as an optional feature. So we need to reconstruct DSISR and DAR manually. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-03-24 20:48:28 +00:00
#define OP_LFS 48
#define OP_LFD 50
#define OP_STFS 52
#define OP_STFD 54
KVM: PPC: Add Gekko SPRs The Gekko has some SPR values that differ from other PPC core values and also some additional ones. Let's add support for them in our mfspr/mtspr emulator. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 10:00:33 +00:00
#define SPRN_GQR0 912
#define SPRN_GQR1 913
#define SPRN_GQR2 914
#define SPRN_GQR3 915
#define SPRN_GQR4 916
#define SPRN_GQR5 917
#define SPRN_GQR6 918
#define SPRN_GQR7 919
KVM: PPC: Add Book3S compatibility code Some code we had so far required defines and had code that was completely Book3S_64 specific. Since we now opened book3s.c to Book3S_32 too, we need to take care of these pieces. So let's add some minor code where it makes sense to not go the Book3S_64 code paths and add compat defines on others. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-04-15 22:11:53 +00:00
/* Book3S_32 defines mfsrin(v) - but that messes up our abstract
* function pointers, so let's just disable the define. */
#undef mfsrin
KVM: PPC: Check privilege level on SPRs We have 3 privilege levels: problem state, supervisor state and hypervisor state. Each of them can access different SPRs, so we need to check on every SPR if it's accessible in the respective mode. Signed-off-by: Alexander Graf <agraf@suse.de>
2011-08-08 14:07:16 +00:00
enum priv_level {
PRIV_PROBLEM = 0,
PRIV_SUPER = 1,
PRIV_HYPER = 2,
};
static bool spr_allowed(struct kvm_vcpu *vcpu, enum priv_level level)
{
/* PAPR VMs only access supervisor SPRs */
if (vcpu->arch.papr_enabled && (level > PRIV_SUPER))
return false;
/* Limit user space to its own small SPR set */
if ((vcpu->arch.shared->msr & MSR_PR) && level > PRIV_PROBLEM)
return false;
return true;
}
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
unsigned int inst, int *advance)
{
int emulated = EMULATE_DONE;
KVM: PPC: Emulator: clean up instruction parsing Instructions on PPC are pretty similarly encoded. So instead of every instruction emulation code decoding the instruction fields itself, we can move that code to more generic places and rely on the compiler to optimize the unused bits away. This has 2 advantages. It makes the code smaller and it makes the code less error prone, as the instruction fields are always available, so accidental misusage is reduced. Functionally, this patch doesn't change anything. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:01:33 +00:00
int rt = get_rt(inst);
int rs = get_rs(inst);
int ra = get_ra(inst);
int rb = get_rb(inst);
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
switch (get_op(inst)) {
case 19:
switch (get_xop(inst)) {
case OP_19_XOP_RFID:
case OP_19_XOP_RFI:
KVM: PPC: Convert SRR0 and SRR1 to shared page The SRR0 and SRR1 registers contain cached values of the PC and MSR respectively. They get written to by the hypervisor when an interrupt occurs or directly by the kernel. They are also used to tell the rfi(d) instruction where to jump to. Because it only gets touched on defined events that, it's very simple to share with the guest. Hypervisor and guest both have full r/w access. This patch converts all users of the current field to the shared page. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-07-29 12:47:46 +00:00
kvmppc_set_pc(vcpu, vcpu->arch.shared->srr0);
kvmppc_set_msr(vcpu, vcpu->arch.shared->srr1);
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
*advance = 0;
break;
default:
emulated = EMULATE_FAIL;
break;
}
break;
case 31:
switch (get_xop(inst)) {
case OP_31_XOP_MFMSR:
KVM: PPC: Emulator: clean up instruction parsing Instructions on PPC are pretty similarly encoded. So instead of every instruction emulation code decoding the instruction fields itself, we can move that code to more generic places and rely on the compiler to optimize the unused bits away. This has 2 advantages. It makes the code smaller and it makes the code less error prone, as the instruction fields are always available, so accidental misusage is reduced. Functionally, this patch doesn't change anything. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:01:33 +00:00
kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->msr);
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
break;
case OP_31_XOP_MTMSRD:
{
KVM: PPC: Emulator: clean up instruction parsing Instructions on PPC are pretty similarly encoded. So instead of every instruction emulation code decoding the instruction fields itself, we can move that code to more generic places and rely on the compiler to optimize the unused bits away. This has 2 advantages. It makes the code smaller and it makes the code less error prone, as the instruction fields are always available, so accidental misusage is reduced. Functionally, this patch doesn't change anything. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:01:33 +00:00
ulong rs_val = kvmppc_get_gpr(vcpu, rs);
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
if (inst & 0x10000) {
KVM: PPC: Emulator: clean up instruction parsing Instructions on PPC are pretty similarly encoded. So instead of every instruction emulation code decoding the instruction fields itself, we can move that code to more generic places and rely on the compiler to optimize the unused bits away. This has 2 advantages. It makes the code smaller and it makes the code less error prone, as the instruction fields are always available, so accidental misusage is reduced. Functionally, this patch doesn't change anything. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:01:33 +00:00
ulong new_msr = vcpu->arch.shared->msr;
new_msr &= ~(MSR_RI | MSR_EE);
new_msr |= rs_val & (MSR_RI | MSR_EE);
vcpu->arch.shared->msr = new_msr;
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
} else
KVM: PPC: Emulator: clean up instruction parsing Instructions on PPC are pretty similarly encoded. So instead of every instruction emulation code decoding the instruction fields itself, we can move that code to more generic places and rely on the compiler to optimize the unused bits away. This has 2 advantages. It makes the code smaller and it makes the code less error prone, as the instruction fields are always available, so accidental misusage is reduced. Functionally, this patch doesn't change anything. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:01:33 +00:00
kvmppc_set_msr(vcpu, rs_val);
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
break;
}
case OP_31_XOP_MTMSR:
KVM: PPC: Emulator: clean up instruction parsing Instructions on PPC are pretty similarly encoded. So instead of every instruction emulation code decoding the instruction fields itself, we can move that code to more generic places and rely on the compiler to optimize the unused bits away. This has 2 advantages. It makes the code smaller and it makes the code less error prone, as the instruction fields are always available, so accidental misusage is reduced. Functionally, this patch doesn't change anything. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:01:33 +00:00
kvmppc_set_msr(vcpu, kvmppc_get_gpr(vcpu, rs));
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
break;
KVM: PPC: Implement mfsr emulation We emulate the mfsrin instruction already, that passes the SR number in a register value. But we lacked support for mfsr that encoded the SR number in the opcode. So let's implement it. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-03-24 20:48:24 +00:00
case OP_31_XOP_MFSR:
{
int srnum;
srnum = kvmppc_get_field(inst, 12 + 32, 15 + 32);
if (vcpu->arch.mmu.mfsrin) {
u32 sr;
sr = vcpu->arch.mmu.mfsrin(vcpu, srnum);
KVM: PPC: Emulator: clean up instruction parsing Instructions on PPC are pretty similarly encoded. So instead of every instruction emulation code decoding the instruction fields itself, we can move that code to more generic places and rely on the compiler to optimize the unused bits away. This has 2 advantages. It makes the code smaller and it makes the code less error prone, as the instruction fields are always available, so accidental misusage is reduced. Functionally, this patch doesn't change anything. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:01:33 +00:00
kvmppc_set_gpr(vcpu, rt, sr);
KVM: PPC: Implement mfsr emulation We emulate the mfsrin instruction already, that passes the SR number in a register value. But we lacked support for mfsr that encoded the SR number in the opcode. So let's implement it. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-03-24 20:48:24 +00:00
}
break;
}
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
case OP_31_XOP_MFSRIN:
{
int srnum;
KVM: PPC: Emulator: clean up instruction parsing Instructions on PPC are pretty similarly encoded. So instead of every instruction emulation code decoding the instruction fields itself, we can move that code to more generic places and rely on the compiler to optimize the unused bits away. This has 2 advantages. It makes the code smaller and it makes the code less error prone, as the instruction fields are always available, so accidental misusage is reduced. Functionally, this patch doesn't change anything. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:01:33 +00:00
srnum = (kvmppc_get_gpr(vcpu, rb) >> 28) & 0xf;
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
if (vcpu->arch.mmu.mfsrin) {
u32 sr;
sr = vcpu->arch.mmu.mfsrin(vcpu, srnum);
KVM: PPC: Emulator: clean up instruction parsing Instructions on PPC are pretty similarly encoded. So instead of every instruction emulation code decoding the instruction fields itself, we can move that code to more generic places and rely on the compiler to optimize the unused bits away. This has 2 advantages. It makes the code smaller and it makes the code less error prone, as the instruction fields are always available, so accidental misusage is reduced. Functionally, this patch doesn't change anything. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:01:33 +00:00
kvmppc_set_gpr(vcpu, rt, sr);
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
}
break;
}
KVM: PPC: Implement mtsr instruction emulation The Book3S_32 specifications allows for two instructions to modify segment registers: mtsrin and mtsr. Most normal operating systems use mtsrin, because it allows to define which segment it wants to change using a register. But since I was trying to run an embedded guest, it turned out to be using mtsr with hardcoded values. So let's also emulate mtsr. It's a valid instruction after all. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 10:00:37 +00:00
case OP_31_XOP_MTSR:
vcpu->arch.mmu.mtsrin(vcpu,
(inst >> 16) & 0xf,
KVM: PPC: Emulator: clean up instruction parsing Instructions on PPC are pretty similarly encoded. So instead of every instruction emulation code decoding the instruction fields itself, we can move that code to more generic places and rely on the compiler to optimize the unused bits away. This has 2 advantages. It makes the code smaller and it makes the code less error prone, as the instruction fields are always available, so accidental misusage is reduced. Functionally, this patch doesn't change anything. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:01:33 +00:00
kvmppc_get_gpr(vcpu, rs));
KVM: PPC: Implement mtsr instruction emulation The Book3S_32 specifications allows for two instructions to modify segment registers: mtsrin and mtsr. Most normal operating systems use mtsrin, because it allows to define which segment it wants to change using a register. But since I was trying to run an embedded guest, it turned out to be using mtsr with hardcoded values. So let's also emulate mtsr. It's a valid instruction after all. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 10:00:37 +00:00
break;
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
case OP_31_XOP_MTSRIN:
vcpu->arch.mmu.mtsrin(vcpu,
KVM: PPC: Emulator: clean up instruction parsing Instructions on PPC are pretty similarly encoded. So instead of every instruction emulation code decoding the instruction fields itself, we can move that code to more generic places and rely on the compiler to optimize the unused bits away. This has 2 advantages. It makes the code smaller and it makes the code less error prone, as the instruction fields are always available, so accidental misusage is reduced. Functionally, this patch doesn't change anything. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:01:33 +00:00
(kvmppc_get_gpr(vcpu, rb) >> 28) & 0xf,
kvmppc_get_gpr(vcpu, rs));
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
break;
case OP_31_XOP_TLBIE:
case OP_31_XOP_TLBIEL:
{
bool large = (inst & 0x00200000) ? true : false;
KVM: PPC: Emulator: clean up instruction parsing Instructions on PPC are pretty similarly encoded. So instead of every instruction emulation code decoding the instruction fields itself, we can move that code to more generic places and rely on the compiler to optimize the unused bits away. This has 2 advantages. It makes the code smaller and it makes the code less error prone, as the instruction fields are always available, so accidental misusage is reduced. Functionally, this patch doesn't change anything. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:01:33 +00:00
ulong addr = kvmppc_get_gpr(vcpu, rb);
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
vcpu->arch.mmu.tlbie(vcpu, addr, large);
break;
}
case OP_31_XOP_EIOIO:
break;
case OP_31_XOP_SLBMTE:
if (!vcpu->arch.mmu.slbmte)
return EMULATE_FAIL;
KVM: PPC: Use accessor functions for GPR access All code in PPC KVM currently accesses gprs in the vcpu struct directly. While there's nothing wrong with that wrt the current way gprs are stored and loaded, it doesn't suffice for the PACA acceleration that will follow in this patchset. So let's just create little wrapper inline functions that we call whenever a GPR needs to be read from or written to. The compiled code shouldn't really change at all for now. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-01-08 01:58:01 +00:00
vcpu->arch.mmu.slbmte(vcpu,
KVM: PPC: Emulator: clean up instruction parsing Instructions on PPC are pretty similarly encoded. So instead of every instruction emulation code decoding the instruction fields itself, we can move that code to more generic places and rely on the compiler to optimize the unused bits away. This has 2 advantages. It makes the code smaller and it makes the code less error prone, as the instruction fields are always available, so accidental misusage is reduced. Functionally, this patch doesn't change anything. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:01:33 +00:00
kvmppc_get_gpr(vcpu, rs),
kvmppc_get_gpr(vcpu, rb));
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
break;
case OP_31_XOP_SLBIE:
if (!vcpu->arch.mmu.slbie)
return EMULATE_FAIL;
KVM: PPC: Use accessor functions for GPR access All code in PPC KVM currently accesses gprs in the vcpu struct directly. While there's nothing wrong with that wrt the current way gprs are stored and loaded, it doesn't suffice for the PACA acceleration that will follow in this patchset. So let's just create little wrapper inline functions that we call whenever a GPR needs to be read from or written to. The compiled code shouldn't really change at all for now. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-01-08 01:58:01 +00:00
vcpu->arch.mmu.slbie(vcpu,
KVM: PPC: Emulator: clean up instruction parsing Instructions on PPC are pretty similarly encoded. So instead of every instruction emulation code decoding the instruction fields itself, we can move that code to more generic places and rely on the compiler to optimize the unused bits away. This has 2 advantages. It makes the code smaller and it makes the code less error prone, as the instruction fields are always available, so accidental misusage is reduced. Functionally, this patch doesn't change anything. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:01:33 +00:00
kvmppc_get_gpr(vcpu, rb));
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
break;
case OP_31_XOP_SLBIA:
if (!vcpu->arch.mmu.slbia)
return EMULATE_FAIL;
vcpu->arch.mmu.slbia(vcpu);
break;
case OP_31_XOP_SLBMFEE:
if (!vcpu->arch.mmu.slbmfee) {
emulated = EMULATE_FAIL;
} else {
KVM: PPC: Emulator: clean up instruction parsing Instructions on PPC are pretty similarly encoded. So instead of every instruction emulation code decoding the instruction fields itself, we can move that code to more generic places and rely on the compiler to optimize the unused bits away. This has 2 advantages. It makes the code smaller and it makes the code less error prone, as the instruction fields are always available, so accidental misusage is reduced. Functionally, this patch doesn't change anything. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:01:33 +00:00
ulong t, rb_val;
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
KVM: PPC: Emulator: clean up instruction parsing Instructions on PPC are pretty similarly encoded. So instead of every instruction emulation code decoding the instruction fields itself, we can move that code to more generic places and rely on the compiler to optimize the unused bits away. This has 2 advantages. It makes the code smaller and it makes the code less error prone, as the instruction fields are always available, so accidental misusage is reduced. Functionally, this patch doesn't change anything. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:01:33 +00:00
rb_val = kvmppc_get_gpr(vcpu, rb);
t = vcpu->arch.mmu.slbmfee(vcpu, rb_val);
kvmppc_set_gpr(vcpu, rt, t);
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
}
break;
case OP_31_XOP_SLBMFEV:
if (!vcpu->arch.mmu.slbmfev) {
emulated = EMULATE_FAIL;
} else {
KVM: PPC: Emulator: clean up instruction parsing Instructions on PPC are pretty similarly encoded. So instead of every instruction emulation code decoding the instruction fields itself, we can move that code to more generic places and rely on the compiler to optimize the unused bits away. This has 2 advantages. It makes the code smaller and it makes the code less error prone, as the instruction fields are always available, so accidental misusage is reduced. Functionally, this patch doesn't change anything. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:01:33 +00:00
ulong t, rb_val;
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
KVM: PPC: Emulator: clean up instruction parsing Instructions on PPC are pretty similarly encoded. So instead of every instruction emulation code decoding the instruction fields itself, we can move that code to more generic places and rely on the compiler to optimize the unused bits away. This has 2 advantages. It makes the code smaller and it makes the code less error prone, as the instruction fields are always available, so accidental misusage is reduced. Functionally, this patch doesn't change anything. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:01:33 +00:00
rb_val = kvmppc_get_gpr(vcpu, rb);
t = vcpu->arch.mmu.slbmfev(vcpu, rb_val);
kvmppc_set_gpr(vcpu, rt, t);
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
}
break;
KVM: PPC: Add emulation for dcba Mac OS X uses the dcba instruction. According to the specification it doesn't guarantee any functionality, so let's just emulate it as nop. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-03-24 20:48:33 +00:00
case OP_31_XOP_DCBA:
/* Gets treated as NOP */
break;
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
case OP_31_XOP_DCBZ:
{
KVM: PPC: Emulator: clean up instruction parsing Instructions on PPC are pretty similarly encoded. So instead of every instruction emulation code decoding the instruction fields itself, we can move that code to more generic places and rely on the compiler to optimize the unused bits away. This has 2 advantages. It makes the code smaller and it makes the code less error prone, as the instruction fields are always available, so accidental misusage is reduced. Functionally, this patch doesn't change anything. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:01:33 +00:00
ulong rb_val = kvmppc_get_gpr(vcpu, rb);
ulong ra_val = 0;
KVM: PPC: Make software load/store return eaddr The Book3S KVM implementation contains some helper functions to load and store data from and to virtual addresses. Unfortunately, this helper used to keep the physical address it so nicely found out for us to itself. So let's change that and make it return the physical address it resolved. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 10:00:38 +00:00
ulong addr, vaddr;
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
u32 zeros[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
KVM: PPC: Fix dcbz emulation On most systems we need to emulate dcbz when running 32 bit guests. So far we've been rather slack, not giving correct DSISR values to the guest. This patch makes the emulation more accurate, introducing a difference between "page not mapped" and "write protection fault". While at it, it also speeds up dcbz emulation by an order of magnitude by using kmap. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-03-24 20:48:32 +00:00
u32 dsisr;
int r;
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
KVM: PPC: Emulator: clean up instruction parsing Instructions on PPC are pretty similarly encoded. So instead of every instruction emulation code decoding the instruction fields itself, we can move that code to more generic places and rely on the compiler to optimize the unused bits away. This has 2 advantages. It makes the code smaller and it makes the code less error prone, as the instruction fields are always available, so accidental misusage is reduced. Functionally, this patch doesn't change anything. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:01:33 +00:00
if (ra)
ra_val = kvmppc_get_gpr(vcpu, ra);
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
KVM: PPC: Emulator: clean up instruction parsing Instructions on PPC are pretty similarly encoded. So instead of every instruction emulation code decoding the instruction fields itself, we can move that code to more generic places and rely on the compiler to optimize the unused bits away. This has 2 advantages. It makes the code smaller and it makes the code less error prone, as the instruction fields are always available, so accidental misusage is reduced. Functionally, this patch doesn't change anything. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:01:33 +00:00
addr = (ra_val + rb_val) & ~31ULL;
KVM: PPC: Convert MSR to shared page One of the most obvious registers to share with the guest directly is the MSR. The MSR contains the "interrupts enabled" flag which the guest has to toggle in critical sections. So in order to bring the overhead of interrupt en- and disabling down, let's put msr into the shared page. Keep in mind that even though you can fully read its contents, writing to it doesn't always update all state. There are a few safe fields that don't require hypervisor interaction. See the documentation for a list of MSR bits that are safe to be set from inside the guest. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-07-29 12:47:43 +00:00
if (!(vcpu->arch.shared->msr & MSR_SF))
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
addr &= 0xffffffff;
KVM: PPC: Make software load/store return eaddr The Book3S KVM implementation contains some helper functions to load and store data from and to virtual addresses. Unfortunately, this helper used to keep the physical address it so nicely found out for us to itself. So let's change that and make it return the physical address it resolved. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 10:00:38 +00:00
vaddr = addr;
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
KVM: PPC: Fix dcbz emulation On most systems we need to emulate dcbz when running 32 bit guests. So far we've been rather slack, not giving correct DSISR values to the guest. This patch makes the emulation more accurate, introducing a difference between "page not mapped" and "write protection fault". While at it, it also speeds up dcbz emulation by an order of magnitude by using kmap. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-03-24 20:48:32 +00:00
r = kvmppc_st(vcpu, &addr, 32, zeros, true);
if ((r == -ENOENT) || (r == -EPERM)) {
KVM: PPC: Use get/set for to_svcpu to help preemption When running the 64-bit Book3s PR code without CONFIG_PREEMPT_NONE, we were doing a few things wrong, most notably access to PACA fields without making sure that the pointers stay stable accross the access (preempt_disable()). This patch moves to_svcpu towards a get/put model which allows us to disable preemption while accessing the shadow vcpu fields in the PACA. That way we can run preemptible and everyone's happy! Reported-by: Jörg Sommer <joerg@alea.gnuu.de> Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-12-09 13:44:13 +00:00
struct kvmppc_book3s_shadow_vcpu *svcpu;
svcpu = svcpu_get(vcpu);
KVM: PPC: Fix dcbz emulation On most systems we need to emulate dcbz when running 32 bit guests. So far we've been rather slack, not giving correct DSISR values to the guest. This patch makes the emulation more accurate, introducing a difference between "page not mapped" and "write protection fault". While at it, it also speeds up dcbz emulation by an order of magnitude by using kmap. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-03-24 20:48:32 +00:00
*advance = 0;
KVM: PPC: Convert DAR to shared page. The DAR register contains the address a data page fault occured at. This register behaves pretty much like a simple data storage register that gets written to on data faults. There is no hypervisor interaction required on read or write. This patch converts all users of the current field to the shared page. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-07-29 12:47:45 +00:00
vcpu->arch.shared->dar = vaddr;
KVM: PPC: Use get/set for to_svcpu to help preemption When running the 64-bit Book3s PR code without CONFIG_PREEMPT_NONE, we were doing a few things wrong, most notably access to PACA fields without making sure that the pointers stay stable accross the access (preempt_disable()). This patch moves to_svcpu towards a get/put model which allows us to disable preemption while accessing the shadow vcpu fields in the PACA. That way we can run preemptible and everyone's happy! Reported-by: Jörg Sommer <joerg@alea.gnuu.de> Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-12-09 13:44:13 +00:00
svcpu->fault_dar = vaddr;
KVM: PPC: Fix dcbz emulation On most systems we need to emulate dcbz when running 32 bit guests. So far we've been rather slack, not giving correct DSISR values to the guest. This patch makes the emulation more accurate, introducing a difference between "page not mapped" and "write protection fault". While at it, it also speeds up dcbz emulation by an order of magnitude by using kmap. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-03-24 20:48:32 +00:00
dsisr = DSISR_ISSTORE;
if (r == -ENOENT)
dsisr |= DSISR_NOHPTE;
else if (r == -EPERM)
dsisr |= DSISR_PROTFAULT;
KVM: PPC: Convert DSISR to shared page The DSISR register contains information about a data page fault. It is fully read/write from inside the guest context and we don't need to worry about interacting based on writes of this register. This patch converts all users of the current field to the shared page. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-07-29 12:47:44 +00:00
vcpu->arch.shared->dsisr = dsisr;
KVM: PPC: Use get/set for to_svcpu to help preemption When running the 64-bit Book3s PR code without CONFIG_PREEMPT_NONE, we were doing a few things wrong, most notably access to PACA fields without making sure that the pointers stay stable accross the access (preempt_disable()). This patch moves to_svcpu towards a get/put model which allows us to disable preemption while accessing the shadow vcpu fields in the PACA. That way we can run preemptible and everyone's happy! Reported-by: Jörg Sommer <joerg@alea.gnuu.de> Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-12-09 13:44:13 +00:00
svcpu->fault_dsisr = dsisr;
svcpu_put(svcpu);
KVM: PPC: Fix dcbz emulation On most systems we need to emulate dcbz when running 32 bit guests. So far we've been rather slack, not giving correct DSISR values to the guest. This patch makes the emulation more accurate, introducing a difference between "page not mapped" and "write protection fault". While at it, it also speeds up dcbz emulation by an order of magnitude by using kmap. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-03-24 20:48:32 +00:00
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
kvmppc_book3s_queue_irqprio(vcpu,
BOOK3S_INTERRUPT_DATA_STORAGE);
}
break;
}
default:
emulated = EMULATE_FAIL;
}
break;
default:
emulated = EMULATE_FAIL;
}
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 10:00:44 +00:00
if (emulated == EMULATE_FAIL)
emulated = kvmppc_emulate_paired_single(run, vcpu);
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
return emulated;
}
powerpc/kvm: Sync guest visible MMU state Currently userspace has no chance to find out which virtual address space we're in and resolve addresses. While that is a big problem for migration, it's also unpleasent when debugging, as gdb and the monitor don't work on virtual addresses. This patch exports enough of the MMU segment state to userspace to make debugging work and thus also includes the groundwork for migration. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-11-30 03:02:02 +00:00
void kvmppc_set_bat(struct kvm_vcpu *vcpu, struct kvmppc_bat *bat, bool upper,
u32 val)
{
if (upper) {
/* Upper BAT */
u32 bl = (val >> 2) & 0x7ff;
bat->bepi_mask = (~bl << 17);
bat->bepi = val & 0xfffe0000;
bat->vs = (val & 2) ? 1 : 0;
bat->vp = (val & 1) ? 1 : 0;
bat->raw = (bat->raw & 0xffffffff00000000ULL) | val;
} else {
/* Lower BAT */
bat->brpn = val & 0xfffe0000;
bat->wimg = (val >> 3) & 0xf;
bat->pp = val & 3;
bat->raw = (bat->raw & 0x00000000ffffffffULL) | ((u64)val << 32);
}
}
KVM: PPC: Move BAT handling code into spr handler The current approach duplicates the spr->bat finding logic and makes it harder to reuse the actually used variables. So let's move everything down to the spr handler. Signed-off-by: Alexander Graf <agraf@suse.de>
2010-08-02 21:23:04 +00:00
static struct kvmppc_bat *kvmppc_find_bat(struct kvm_vcpu *vcpu, int sprn)
KVM: PPC: Implement BAT reads BATs can't only be written to, you can also read them out! So let's implement emulation for reading BAT values again. While at it, I also made BAT setting flush the segment cache, so we're absolutely sure there's no MMU state left when writing BATs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-03-24 20:48:25 +00:00
{
struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
struct kvmppc_bat *bat;
switch (sprn) {
case SPRN_IBAT0U ... SPRN_IBAT3L:
bat = &vcpu_book3s->ibat[(sprn - SPRN_IBAT0U) / 2];
break;
case SPRN_IBAT4U ... SPRN_IBAT7L:
bat = &vcpu_book3s->ibat[4 + ((sprn - SPRN_IBAT4U) / 2)];
break;
case SPRN_DBAT0U ... SPRN_DBAT3L:
bat = &vcpu_book3s->dbat[(sprn - SPRN_DBAT0U) / 2];
break;
case SPRN_DBAT4U ... SPRN_DBAT7L:
bat = &vcpu_book3s->dbat[4 + ((sprn - SPRN_DBAT4U) / 2)];
break;
default:
BUG();
}
KVM: PPC: Move BAT handling code into spr handler The current approach duplicates the spr->bat finding logic and makes it harder to reuse the actually used variables. So let's move everything down to the spr handler. Signed-off-by: Alexander Graf <agraf@suse.de>
2010-08-02 21:23:04 +00:00
return bat;
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
}
KVM: PPC: Emulator: clean up SPR reads and writes When reading and writing SPRs, every SPR emulation piece had to read or write the respective GPR the value was read from or stored in itself. This approach is pretty prone to failure. What if we accidentally implement mfspr emulation where we just do "break" and nothing else? Suddenly we would get a random value in the return register - which is always a bad idea. So let's consolidate the generic code paths and only give the core specific SPR handling code readily made variables to read/write from/to. Functionally, this patch doesn't change anything, but it increases the readability of the code and makes is less prone to bugs. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:55:12 +00:00
int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val)
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
{
int emulated = EMULATE_DONE;
switch (sprn) {
case SPRN_SDR1:
KVM: PPC: Check privilege level on SPRs We have 3 privilege levels: problem state, supervisor state and hypervisor state. Each of them can access different SPRs, so we need to check on every SPR if it's accessible in the respective mode. Signed-off-by: Alexander Graf <agraf@suse.de>
2011-08-08 14:07:16 +00:00
if (!spr_allowed(vcpu, PRIV_HYPER))
goto unprivileged;
KVM: PPC: Use accessor functions for GPR access All code in PPC KVM currently accesses gprs in the vcpu struct directly. While there's nothing wrong with that wrt the current way gprs are stored and loaded, it doesn't suffice for the PACA acceleration that will follow in this patchset. So let's just create little wrapper inline functions that we call whenever a GPR needs to be read from or written to. The compiled code shouldn't really change at all for now. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-01-08 01:58:01 +00:00
to_book3s(vcpu)->sdr1 = spr_val;
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
break;
case SPRN_DSISR:
KVM: PPC: Convert DSISR to shared page The DSISR register contains information about a data page fault. It is fully read/write from inside the guest context and we don't need to worry about interacting based on writes of this register. This patch converts all users of the current field to the shared page. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-07-29 12:47:44 +00:00
vcpu->arch.shared->dsisr = spr_val;
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
break;
case SPRN_DAR:
KVM: PPC: Convert DAR to shared page. The DAR register contains the address a data page fault occured at. This register behaves pretty much like a simple data storage register that gets written to on data faults. There is no hypervisor interaction required on read or write. This patch converts all users of the current field to the shared page. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-07-29 12:47:45 +00:00
vcpu->arch.shared->dar = spr_val;
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
break;
case SPRN_HIOR:
KVM: PPC: Use accessor functions for GPR access All code in PPC KVM currently accesses gprs in the vcpu struct directly. While there's nothing wrong with that wrt the current way gprs are stored and loaded, it doesn't suffice for the PACA acceleration that will follow in this patchset. So let's just create little wrapper inline functions that we call whenever a GPR needs to be read from or written to. The compiled code shouldn't really change at all for now. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-01-08 01:58:01 +00:00
to_book3s(vcpu)->hior = spr_val;
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
break;
case SPRN_IBAT0U ... SPRN_IBAT3L:
case SPRN_IBAT4U ... SPRN_IBAT7L:
case SPRN_DBAT0U ... SPRN_DBAT3L:
case SPRN_DBAT4U ... SPRN_DBAT7L:
KVM: PPC: Move BAT handling code into spr handler The current approach duplicates the spr->bat finding logic and makes it harder to reuse the actually used variables. So let's move everything down to the spr handler. Signed-off-by: Alexander Graf <agraf@suse.de>
2010-08-02 21:23:04 +00:00
{
struct kvmppc_bat *bat = kvmppc_find_bat(vcpu, sprn);
kvmppc_set_bat(vcpu, bat, !(sprn % 2), (u32)spr_val);
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
/* BAT writes happen so rarely that we're ok to flush
* everything here */
kvmppc_mmu_pte_flush(vcpu, 0, 0);
KVM: PPC: Implement BAT reads BATs can't only be written to, you can also read them out! So let's implement emulation for reading BAT values again. While at it, I also made BAT setting flush the segment cache, so we're absolutely sure there's no MMU state left when writing BATs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-03-24 20:48:25 +00:00
kvmppc_mmu_flush_segments(vcpu);
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
break;
KVM: PPC: Move BAT handling code into spr handler The current approach duplicates the spr->bat finding logic and makes it harder to reuse the actually used variables. So let's move everything down to the spr handler. Signed-off-by: Alexander Graf <agraf@suse.de>
2010-08-02 21:23:04 +00:00
}
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
case SPRN_HID0:
KVM: PPC: Use accessor functions for GPR access All code in PPC KVM currently accesses gprs in the vcpu struct directly. While there's nothing wrong with that wrt the current way gprs are stored and loaded, it doesn't suffice for the PACA acceleration that will follow in this patchset. So let's just create little wrapper inline functions that we call whenever a GPR needs to be read from or written to. The compiled code shouldn't really change at all for now. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-01-08 01:58:01 +00:00
to_book3s(vcpu)->hid[0] = spr_val;
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
break;
case SPRN_HID1:
KVM: PPC: Use accessor functions for GPR access All code in PPC KVM currently accesses gprs in the vcpu struct directly. While there's nothing wrong with that wrt the current way gprs are stored and loaded, it doesn't suffice for the PACA acceleration that will follow in this patchset. So let's just create little wrapper inline functions that we call whenever a GPR needs to be read from or written to. The compiled code shouldn't really change at all for now. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-01-08 01:58:01 +00:00
to_book3s(vcpu)->hid[1] = spr_val;
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
break;
case SPRN_HID2:
KVM: PPC: Use accessor functions for GPR access All code in PPC KVM currently accesses gprs in the vcpu struct directly. While there's nothing wrong with that wrt the current way gprs are stored and loaded, it doesn't suffice for the PACA acceleration that will follow in this patchset. So let's just create little wrapper inline functions that we call whenever a GPR needs to be read from or written to. The compiled code shouldn't really change at all for now. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-01-08 01:58:01 +00:00
to_book3s(vcpu)->hid[2] = spr_val;
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
break;
KVM: PPC: Add Gekko SPRs The Gekko has some SPR values that differ from other PPC core values and also some additional ones. Let's add support for them in our mfspr/mtspr emulator. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 10:00:33 +00:00
case SPRN_HID2_GEKKO:
to_book3s(vcpu)->hid[2] = spr_val;
/* HID2.PSE controls paired single on gekko */
switch (vcpu->arch.pvr) {
case 0x00080200: /* lonestar 2.0 */
case 0x00088202: /* lonestar 2.2 */
case 0x70000100: /* gekko 1.0 */
case 0x00080100: /* gekko 2.0 */
case 0x00083203: /* gekko 2.3a */
case 0x00083213: /* gekko 2.3b */
case 0x00083204: /* gekko 2.4 */
case 0x00083214: /* gekko 2.4e (8SE) - retail HW2 */
KVM: PPC: Enable native paired singles When we're on a paired single capable host, we can just always enable paired singles and expose them to the guest directly. This approach breaks when multiple VMs run and access PS concurrently, but this should suffice until we get a proper framework for it in Linux. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-04-20 00:49:54 +00:00
case 0x00087200: /* broadway */
if (vcpu->arch.hflags & BOOK3S_HFLAG_NATIVE_PS) {
/* Native paired singles */
} else if (spr_val & (1 << 29)) { /* HID2.PSE */
KVM: PPC: Add Gekko SPRs The Gekko has some SPR values that differ from other PPC core values and also some additional ones. Let's add support for them in our mfspr/mtspr emulator. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 10:00:33 +00:00
vcpu->arch.hflags |= BOOK3S_HFLAG_PAIRED_SINGLE;
kvmppc_giveup_ext(vcpu, MSR_FP);
} else {
vcpu->arch.hflags &= ~BOOK3S_HFLAG_PAIRED_SINGLE;
}
break;
}
break;
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
case SPRN_HID4:
KVM: PPC: Add Gekko SPRs The Gekko has some SPR values that differ from other PPC core values and also some additional ones. Let's add support for them in our mfspr/mtspr emulator. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 10:00:33 +00:00
case SPRN_HID4_GEKKO:
KVM: PPC: Use accessor functions for GPR access All code in PPC KVM currently accesses gprs in the vcpu struct directly. While there's nothing wrong with that wrt the current way gprs are stored and loaded, it doesn't suffice for the PACA acceleration that will follow in this patchset. So let's just create little wrapper inline functions that we call whenever a GPR needs to be read from or written to. The compiled code shouldn't really change at all for now. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-01-08 01:58:01 +00:00
to_book3s(vcpu)->hid[4] = spr_val;
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
break;
case SPRN_HID5:
KVM: PPC: Use accessor functions for GPR access All code in PPC KVM currently accesses gprs in the vcpu struct directly. While there's nothing wrong with that wrt the current way gprs are stored and loaded, it doesn't suffice for the PACA acceleration that will follow in this patchset. So let's just create little wrapper inline functions that we call whenever a GPR needs to be read from or written to. The compiled code shouldn't really change at all for now. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-01-08 01:58:01 +00:00
to_book3s(vcpu)->hid[5] = spr_val;
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
/* guest HID5 set can change is_dcbz32 */
if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
(mfmsr() & MSR_HV))
vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
break;
KVM: PPC: Add Gekko SPRs The Gekko has some SPR values that differ from other PPC core values and also some additional ones. Let's add support for them in our mfspr/mtspr emulator. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 10:00:33 +00:00
case SPRN_GQR0:
case SPRN_GQR1:
case SPRN_GQR2:
case SPRN_GQR3:
case SPRN_GQR4:
case SPRN_GQR5:
case SPRN_GQR6:
case SPRN_GQR7:
to_book3s(vcpu)->gqr[sprn - SPRN_GQR0] = spr_val;
break;
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
case SPRN_ICTC:
case SPRN_THRM1:
case SPRN_THRM2:
case SPRN_THRM3:
case SPRN_CTRLF:
case SPRN_CTRLT:
KVM: PPC: Add Gekko SPRs The Gekko has some SPR values that differ from other PPC core values and also some additional ones. Let's add support for them in our mfspr/mtspr emulator. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 10:00:33 +00:00
case SPRN_L2CR:
case SPRN_MMCR0_GEKKO:
case SPRN_MMCR1_GEKKO:
case SPRN_PMC1_GEKKO:
case SPRN_PMC2_GEKKO:
case SPRN_PMC3_GEKKO:
case SPRN_PMC4_GEKKO:
case SPRN_WPAR_GEKKO:
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
break;
KVM: PPC: Check privilege level on SPRs We have 3 privilege levels: problem state, supervisor state and hypervisor state. Each of them can access different SPRs, so we need to check on every SPR if it's accessible in the respective mode. Signed-off-by: Alexander Graf <agraf@suse.de>
2011-08-08 14:07:16 +00:00
unprivileged:
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
default:
printk(KERN_INFO "KVM: invalid SPR write: %d\n", sprn);
#ifndef DEBUG_SPR
emulated = EMULATE_FAIL;
#endif
break;
}
return emulated;
}
KVM: PPC: Emulator: clean up SPR reads and writes When reading and writing SPRs, every SPR emulation piece had to read or write the respective GPR the value was read from or stored in itself. This approach is pretty prone to failure. What if we accidentally implement mfspr emulation where we just do "break" and nothing else? Suddenly we would get a random value in the return register - which is always a bad idea. So let's consolidate the generic code paths and only give the core specific SPR handling code readily made variables to read/write from/to. Functionally, this patch doesn't change anything, but it increases the readability of the code and makes is less prone to bugs. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:55:12 +00:00
int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val)
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
{
int emulated = EMULATE_DONE;
switch (sprn) {
KVM: PPC: Implement BAT reads BATs can't only be written to, you can also read them out! So let's implement emulation for reading BAT values again. While at it, I also made BAT setting flush the segment cache, so we're absolutely sure there's no MMU state left when writing BATs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-03-24 20:48:25 +00:00
case SPRN_IBAT0U ... SPRN_IBAT3L:
case SPRN_IBAT4U ... SPRN_IBAT7L:
case SPRN_DBAT0U ... SPRN_DBAT3L:
case SPRN_DBAT4U ... SPRN_DBAT7L:
KVM: PPC: Move BAT handling code into spr handler The current approach duplicates the spr->bat finding logic and makes it harder to reuse the actually used variables. So let's move everything down to the spr handler. Signed-off-by: Alexander Graf <agraf@suse.de>
2010-08-02 21:23:04 +00:00
{
struct kvmppc_bat *bat = kvmppc_find_bat(vcpu, sprn);
if (sprn % 2)
KVM: PPC: Emulator: clean up SPR reads and writes When reading and writing SPRs, every SPR emulation piece had to read or write the respective GPR the value was read from or stored in itself. This approach is pretty prone to failure. What if we accidentally implement mfspr emulation where we just do "break" and nothing else? Suddenly we would get a random value in the return register - which is always a bad idea. So let's consolidate the generic code paths and only give the core specific SPR handling code readily made variables to read/write from/to. Functionally, this patch doesn't change anything, but it increases the readability of the code and makes is less prone to bugs. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:55:12 +00:00
*spr_val = bat->raw >> 32;
KVM: PPC: Move BAT handling code into spr handler The current approach duplicates the spr->bat finding logic and makes it harder to reuse the actually used variables. So let's move everything down to the spr handler. Signed-off-by: Alexander Graf <agraf@suse.de>
2010-08-02 21:23:04 +00:00
else
KVM: PPC: Emulator: clean up SPR reads and writes When reading and writing SPRs, every SPR emulation piece had to read or write the respective GPR the value was read from or stored in itself. This approach is pretty prone to failure. What if we accidentally implement mfspr emulation where we just do "break" and nothing else? Suddenly we would get a random value in the return register - which is always a bad idea. So let's consolidate the generic code paths and only give the core specific SPR handling code readily made variables to read/write from/to. Functionally, this patch doesn't change anything, but it increases the readability of the code and makes is less prone to bugs. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:55:12 +00:00
*spr_val = bat->raw;
KVM: PPC: Move BAT handling code into spr handler The current approach duplicates the spr->bat finding logic and makes it harder to reuse the actually used variables. So let's move everything down to the spr handler. Signed-off-by: Alexander Graf <agraf@suse.de>
2010-08-02 21:23:04 +00:00
KVM: PPC: Implement BAT reads BATs can't only be written to, you can also read them out! So let's implement emulation for reading BAT values again. While at it, I also made BAT setting flush the segment cache, so we're absolutely sure there's no MMU state left when writing BATs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-03-24 20:48:25 +00:00
break;
KVM: PPC: Move BAT handling code into spr handler The current approach duplicates the spr->bat finding logic and makes it harder to reuse the actually used variables. So let's move everything down to the spr handler. Signed-off-by: Alexander Graf <agraf@suse.de>
2010-08-02 21:23:04 +00:00
}
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
case SPRN_SDR1:
KVM: PPC: Check privilege level on SPRs We have 3 privilege levels: problem state, supervisor state and hypervisor state. Each of them can access different SPRs, so we need to check on every SPR if it's accessible in the respective mode. Signed-off-by: Alexander Graf <agraf@suse.de>
2011-08-08 14:07:16 +00:00
if (!spr_allowed(vcpu, PRIV_HYPER))
goto unprivileged;
KVM: PPC: Emulator: clean up SPR reads and writes When reading and writing SPRs, every SPR emulation piece had to read or write the respective GPR the value was read from or stored in itself. This approach is pretty prone to failure. What if we accidentally implement mfspr emulation where we just do "break" and nothing else? Suddenly we would get a random value in the return register - which is always a bad idea. So let's consolidate the generic code paths and only give the core specific SPR handling code readily made variables to read/write from/to. Functionally, this patch doesn't change anything, but it increases the readability of the code and makes is less prone to bugs. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:55:12 +00:00
*spr_val = to_book3s(vcpu)->sdr1;
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
break;
case SPRN_DSISR:
KVM: PPC: Emulator: clean up SPR reads and writes When reading and writing SPRs, every SPR emulation piece had to read or write the respective GPR the value was read from or stored in itself. This approach is pretty prone to failure. What if we accidentally implement mfspr emulation where we just do "break" and nothing else? Suddenly we would get a random value in the return register - which is always a bad idea. So let's consolidate the generic code paths and only give the core specific SPR handling code readily made variables to read/write from/to. Functionally, this patch doesn't change anything, but it increases the readability of the code and makes is less prone to bugs. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:55:12 +00:00
*spr_val = vcpu->arch.shared->dsisr;
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
break;
case SPRN_DAR:
KVM: PPC: Emulator: clean up SPR reads and writes When reading and writing SPRs, every SPR emulation piece had to read or write the respective GPR the value was read from or stored in itself. This approach is pretty prone to failure. What if we accidentally implement mfspr emulation where we just do "break" and nothing else? Suddenly we would get a random value in the return register - which is always a bad idea. So let's consolidate the generic code paths and only give the core specific SPR handling code readily made variables to read/write from/to. Functionally, this patch doesn't change anything, but it increases the readability of the code and makes is less prone to bugs. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:55:12 +00:00
*spr_val = vcpu->arch.shared->dar;
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
break;
case SPRN_HIOR:
KVM: PPC: Emulator: clean up SPR reads and writes When reading and writing SPRs, every SPR emulation piece had to read or write the respective GPR the value was read from or stored in itself. This approach is pretty prone to failure. What if we accidentally implement mfspr emulation where we just do "break" and nothing else? Suddenly we would get a random value in the return register - which is always a bad idea. So let's consolidate the generic code paths and only give the core specific SPR handling code readily made variables to read/write from/to. Functionally, this patch doesn't change anything, but it increases the readability of the code and makes is less prone to bugs. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:55:12 +00:00
*spr_val = to_book3s(vcpu)->hior;
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
break;
case SPRN_HID0:
KVM: PPC: Emulator: clean up SPR reads and writes When reading and writing SPRs, every SPR emulation piece had to read or write the respective GPR the value was read from or stored in itself. This approach is pretty prone to failure. What if we accidentally implement mfspr emulation where we just do "break" and nothing else? Suddenly we would get a random value in the return register - which is always a bad idea. So let's consolidate the generic code paths and only give the core specific SPR handling code readily made variables to read/write from/to. Functionally, this patch doesn't change anything, but it increases the readability of the code and makes is less prone to bugs. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:55:12 +00:00
*spr_val = to_book3s(vcpu)->hid[0];
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
break;
case SPRN_HID1:
KVM: PPC: Emulator: clean up SPR reads and writes When reading and writing SPRs, every SPR emulation piece had to read or write the respective GPR the value was read from or stored in itself. This approach is pretty prone to failure. What if we accidentally implement mfspr emulation where we just do "break" and nothing else? Suddenly we would get a random value in the return register - which is always a bad idea. So let's consolidate the generic code paths and only give the core specific SPR handling code readily made variables to read/write from/to. Functionally, this patch doesn't change anything, but it increases the readability of the code and makes is less prone to bugs. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:55:12 +00:00
*spr_val = to_book3s(vcpu)->hid[1];
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
break;
case SPRN_HID2:
KVM: PPC: Add Gekko SPRs The Gekko has some SPR values that differ from other PPC core values and also some additional ones. Let's add support for them in our mfspr/mtspr emulator. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 10:00:33 +00:00
case SPRN_HID2_GEKKO:
KVM: PPC: Emulator: clean up SPR reads and writes When reading and writing SPRs, every SPR emulation piece had to read or write the respective GPR the value was read from or stored in itself. This approach is pretty prone to failure. What if we accidentally implement mfspr emulation where we just do "break" and nothing else? Suddenly we would get a random value in the return register - which is always a bad idea. So let's consolidate the generic code paths and only give the core specific SPR handling code readily made variables to read/write from/to. Functionally, this patch doesn't change anything, but it increases the readability of the code and makes is less prone to bugs. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:55:12 +00:00
*spr_val = to_book3s(vcpu)->hid[2];
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
break;
case SPRN_HID4:
KVM: PPC: Add Gekko SPRs The Gekko has some SPR values that differ from other PPC core values and also some additional ones. Let's add support for them in our mfspr/mtspr emulator. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 10:00:33 +00:00
case SPRN_HID4_GEKKO:
KVM: PPC: Emulator: clean up SPR reads and writes When reading and writing SPRs, every SPR emulation piece had to read or write the respective GPR the value was read from or stored in itself. This approach is pretty prone to failure. What if we accidentally implement mfspr emulation where we just do "break" and nothing else? Suddenly we would get a random value in the return register - which is always a bad idea. So let's consolidate the generic code paths and only give the core specific SPR handling code readily made variables to read/write from/to. Functionally, this patch doesn't change anything, but it increases the readability of the code and makes is less prone to bugs. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:55:12 +00:00
*spr_val = to_book3s(vcpu)->hid[4];
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
break;
case SPRN_HID5:
KVM: PPC: Emulator: clean up SPR reads and writes When reading and writing SPRs, every SPR emulation piece had to read or write the respective GPR the value was read from or stored in itself. This approach is pretty prone to failure. What if we accidentally implement mfspr emulation where we just do "break" and nothing else? Suddenly we would get a random value in the return register - which is always a bad idea. So let's consolidate the generic code paths and only give the core specific SPR handling code readily made variables to read/write from/to. Functionally, this patch doesn't change anything, but it increases the readability of the code and makes is less prone to bugs. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:55:12 +00:00
*spr_val = to_book3s(vcpu)->hid[5];
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
break;
KVM: PPC: Stub emulate CFAR and PURR SPRs Recent Linux versions use the CFAR and PURR SPRs, but don't really care about their contents (yet). So for now, we can simply return 0 when the guest wants to read them. Signed-off-by: Alexander Graf <agraf@suse.de>
2011-08-08 15:22:59 +00:00
case SPRN_CFAR:
case SPRN_PURR:
KVM: PPC: Emulator: clean up SPR reads and writes When reading and writing SPRs, every SPR emulation piece had to read or write the respective GPR the value was read from or stored in itself. This approach is pretty prone to failure. What if we accidentally implement mfspr emulation where we just do "break" and nothing else? Suddenly we would get a random value in the return register - which is always a bad idea. So let's consolidate the generic code paths and only give the core specific SPR handling code readily made variables to read/write from/to. Functionally, this patch doesn't change anything, but it increases the readability of the code and makes is less prone to bugs. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:55:12 +00:00
*spr_val = 0;
KVM: PPC: Stub emulate CFAR and PURR SPRs Recent Linux versions use the CFAR and PURR SPRs, but don't really care about their contents (yet). So for now, we can simply return 0 when the guest wants to read them. Signed-off-by: Alexander Graf <agraf@suse.de>
2011-08-08 15:22:59 +00:00
break;
KVM: PPC: Add Gekko SPRs The Gekko has some SPR values that differ from other PPC core values and also some additional ones. Let's add support for them in our mfspr/mtspr emulator. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 10:00:33 +00:00
case SPRN_GQR0:
case SPRN_GQR1:
case SPRN_GQR2:
case SPRN_GQR3:
case SPRN_GQR4:
case SPRN_GQR5:
case SPRN_GQR6:
case SPRN_GQR7:
KVM: PPC: Emulator: clean up SPR reads and writes When reading and writing SPRs, every SPR emulation piece had to read or write the respective GPR the value was read from or stored in itself. This approach is pretty prone to failure. What if we accidentally implement mfspr emulation where we just do "break" and nothing else? Suddenly we would get a random value in the return register - which is always a bad idea. So let's consolidate the generic code paths and only give the core specific SPR handling code readily made variables to read/write from/to. Functionally, this patch doesn't change anything, but it increases the readability of the code and makes is less prone to bugs. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:55:12 +00:00
*spr_val = to_book3s(vcpu)->gqr[sprn - SPRN_GQR0];
KVM: PPC: Add Gekko SPRs The Gekko has some SPR values that differ from other PPC core values and also some additional ones. Let's add support for them in our mfspr/mtspr emulator. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 10:00:33 +00:00
break;
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
case SPRN_THRM1:
case SPRN_THRM2:
case SPRN_THRM3:
case SPRN_CTRLF:
case SPRN_CTRLT:
KVM: PPC: Add Gekko SPRs The Gekko has some SPR values that differ from other PPC core values and also some additional ones. Let's add support for them in our mfspr/mtspr emulator. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 10:00:33 +00:00
case SPRN_L2CR:
case SPRN_MMCR0_GEKKO:
case SPRN_MMCR1_GEKKO:
case SPRN_PMC1_GEKKO:
case SPRN_PMC2_GEKKO:
case SPRN_PMC3_GEKKO:
case SPRN_PMC4_GEKKO:
case SPRN_WPAR_GEKKO:
KVM: PPC: Emulator: clean up SPR reads and writes When reading and writing SPRs, every SPR emulation piece had to read or write the respective GPR the value was read from or stored in itself. This approach is pretty prone to failure. What if we accidentally implement mfspr emulation where we just do "break" and nothing else? Suddenly we would get a random value in the return register - which is always a bad idea. So let's consolidate the generic code paths and only give the core specific SPR handling code readily made variables to read/write from/to. Functionally, this patch doesn't change anything, but it increases the readability of the code and makes is less prone to bugs. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:55:12 +00:00
*spr_val = 0;
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
break;
default:
KVM: PPC: Check privilege level on SPRs We have 3 privilege levels: problem state, supervisor state and hypervisor state. Each of them can access different SPRs, so we need to check on every SPR if it's accessible in the respective mode. Signed-off-by: Alexander Graf <agraf@suse.de>
2011-08-08 14:07:16 +00:00
unprivileged:
Add book3s_64 specific opcode emulation There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30 05:47:14 +00:00
printk(KERN_INFO "KVM: invalid SPR read: %d\n", sprn);
#ifndef DEBUG_SPR
emulated = EMULATE_FAIL;
#endif
break;
}
return emulated;
}
KVM: PPC: Implement alignment interrupt Mac OS X has some applications - namely the Finder - that require alignment interrupts to work properly. So we need to implement them. But the spec for 970 and 750 also looks different. While 750 requires the DSISR and DAR fields to reflect some instruction bits (DSISR) and the fault address (DAR), the 970 declares this as an optional feature. So we need to reconstruct DSISR and DAR manually. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-03-24 20:48:28 +00:00
u32 kvmppc_alignment_dsisr(struct kvm_vcpu *vcpu, unsigned int inst)
{
u32 dsisr = 0;
/*
* This is what the spec says about DSISR bits (not mentioned = 0):
*
* 12:13 [DS] Set to bits 30:31
* 15:16 [X] Set to bits 29:30
* 17 [X] Set to bit 25
* [D/DS] Set to bit 5
* 18:21 [X] Set to bits 21:24
* [D/DS] Set to bits 1:4
* 22:26 Set to bits 6:10 (RT/RS/FRT/FRS)
* 27:31 Set to bits 11:15 (RA)
*/
switch (get_op(inst)) {
/* D-form */
case OP_LFS:
case OP_LFD:
case OP_STFD:
case OP_STFS:
dsisr |= (inst >> 12) & 0x4000; /* bit 17 */
dsisr |= (inst >> 17) & 0x3c00; /* bits 18:21 */
break;
/* X-form */
case 31:
dsisr |= (inst << 14) & 0x18000; /* bits 15:16 */
dsisr |= (inst << 8) & 0x04000; /* bit 17 */
dsisr |= (inst << 3) & 0x03c00; /* bits 18:21 */
break;
default:
printk(KERN_INFO "KVM: Unaligned instruction 0x%x\n", inst);
break;
}
dsisr |= (inst >> 16) & 0x03ff; /* bits 22:31 */
return dsisr;
}
ulong kvmppc_alignment_dar(struct kvm_vcpu *vcpu, unsigned int inst)
{
ulong dar = 0;
KVM: PPC: Emulator: clean up instruction parsing Instructions on PPC are pretty similarly encoded. So instead of every instruction emulation code decoding the instruction fields itself, we can move that code to more generic places and rely on the compiler to optimize the unused bits away. This has 2 advantages. It makes the code smaller and it makes the code less error prone, as the instruction fields are always available, so accidental misusage is reduced. Functionally, this patch doesn't change anything. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:01:33 +00:00
ulong ra = get_ra(inst);
ulong rb = get_rb(inst);
KVM: PPC: Implement alignment interrupt Mac OS X has some applications - namely the Finder - that require alignment interrupts to work properly. So we need to implement them. But the spec for 970 and 750 also looks different. While 750 requires the DSISR and DAR fields to reflect some instruction bits (DSISR) and the fault address (DAR), the 970 declares this as an optional feature. So we need to reconstruct DSISR and DAR manually. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-03-24 20:48:28 +00:00
switch (get_op(inst)) {
case OP_LFS:
case OP_LFD:
case OP_STFD:
case OP_STFS:
if (ra)
dar = kvmppc_get_gpr(vcpu, ra);
dar += (s32)((s16)inst);
break;
case 31:
if (ra)
dar = kvmppc_get_gpr(vcpu, ra);
KVM: PPC: Emulator: clean up instruction parsing Instructions on PPC are pretty similarly encoded. So instead of every instruction emulation code decoding the instruction fields itself, we can move that code to more generic places and rely on the compiler to optimize the unused bits away. This has 2 advantages. It makes the code smaller and it makes the code less error prone, as the instruction fields are always available, so accidental misusage is reduced. Functionally, this patch doesn't change anything. Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-04 12:01:33 +00:00
dar += kvmppc_get_gpr(vcpu, rb);
KVM: PPC: Implement alignment interrupt Mac OS X has some applications - namely the Finder - that require alignment interrupts to work properly. So we need to implement them. But the spec for 970 and 750 also looks different. While 750 requires the DSISR and DAR fields to reflect some instruction bits (DSISR) and the fault address (DAR), the 970 declares this as an optional feature. So we need to reconstruct DSISR and DAR manually. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-03-24 20:48:28 +00:00
break;
default:
printk(KERN_INFO "KVM: Unaligned instruction 0x%x\n", inst);
break;
}
return dar;
}
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