mirror of
https://github.com/torvalds/linux.git
synced 2024-12-02 17:11:33 +00:00
3f2bb76433
The handlers support PR KVM from the day one; however the PR KVM's enable/disable hcalls handler missed these ones. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
475 lines
12 KiB
C
475 lines
12 KiB
C
/*
|
|
* Copyright (C) 2011. Freescale Inc. All rights reserved.
|
|
*
|
|
* Authors:
|
|
* Alexander Graf <agraf@suse.de>
|
|
* Paul Mackerras <paulus@samba.org>
|
|
*
|
|
* Description:
|
|
*
|
|
* Hypercall handling for running PAPR guests in PR KVM on Book 3S
|
|
* processors.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <linux/anon_inodes.h>
|
|
|
|
#include <linux/uaccess.h>
|
|
#include <asm/kvm_ppc.h>
|
|
#include <asm/kvm_book3s.h>
|
|
|
|
#define HPTE_SIZE 16 /* bytes per HPT entry */
|
|
|
|
static unsigned long get_pteg_addr(struct kvm_vcpu *vcpu, long pte_index)
|
|
{
|
|
struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
|
|
unsigned long pteg_addr;
|
|
|
|
pte_index <<= 4;
|
|
pte_index &= ((1 << ((vcpu_book3s->sdr1 & 0x1f) + 11)) - 1) << 7 | 0x70;
|
|
pteg_addr = vcpu_book3s->sdr1 & 0xfffffffffffc0000ULL;
|
|
pteg_addr |= pte_index;
|
|
|
|
return pteg_addr;
|
|
}
|
|
|
|
static int kvmppc_h_pr_enter(struct kvm_vcpu *vcpu)
|
|
{
|
|
long flags = kvmppc_get_gpr(vcpu, 4);
|
|
long pte_index = kvmppc_get_gpr(vcpu, 5);
|
|
__be64 pteg[2 * 8];
|
|
__be64 *hpte;
|
|
unsigned long pteg_addr, i;
|
|
long int ret;
|
|
|
|
i = pte_index & 7;
|
|
pte_index &= ~7UL;
|
|
pteg_addr = get_pteg_addr(vcpu, pte_index);
|
|
|
|
mutex_lock(&vcpu->kvm->arch.hpt_mutex);
|
|
ret = H_FUNCTION;
|
|
if (copy_from_user(pteg, (void __user *)pteg_addr, sizeof(pteg)))
|
|
goto done;
|
|
hpte = pteg;
|
|
|
|
ret = H_PTEG_FULL;
|
|
if (likely((flags & H_EXACT) == 0)) {
|
|
for (i = 0; ; ++i) {
|
|
if (i == 8)
|
|
goto done;
|
|
if ((be64_to_cpu(*hpte) & HPTE_V_VALID) == 0)
|
|
break;
|
|
hpte += 2;
|
|
}
|
|
} else {
|
|
hpte += i * 2;
|
|
if (*hpte & HPTE_V_VALID)
|
|
goto done;
|
|
}
|
|
|
|
hpte[0] = cpu_to_be64(kvmppc_get_gpr(vcpu, 6));
|
|
hpte[1] = cpu_to_be64(kvmppc_get_gpr(vcpu, 7));
|
|
pteg_addr += i * HPTE_SIZE;
|
|
ret = H_FUNCTION;
|
|
if (copy_to_user((void __user *)pteg_addr, hpte, HPTE_SIZE))
|
|
goto done;
|
|
kvmppc_set_gpr(vcpu, 4, pte_index | i);
|
|
ret = H_SUCCESS;
|
|
|
|
done:
|
|
mutex_unlock(&vcpu->kvm->arch.hpt_mutex);
|
|
kvmppc_set_gpr(vcpu, 3, ret);
|
|
|
|
return EMULATE_DONE;
|
|
}
|
|
|
|
static int kvmppc_h_pr_remove(struct kvm_vcpu *vcpu)
|
|
{
|
|
unsigned long flags= kvmppc_get_gpr(vcpu, 4);
|
|
unsigned long pte_index = kvmppc_get_gpr(vcpu, 5);
|
|
unsigned long avpn = kvmppc_get_gpr(vcpu, 6);
|
|
unsigned long v = 0, pteg, rb;
|
|
unsigned long pte[2];
|
|
long int ret;
|
|
|
|
pteg = get_pteg_addr(vcpu, pte_index);
|
|
mutex_lock(&vcpu->kvm->arch.hpt_mutex);
|
|
ret = H_FUNCTION;
|
|
if (copy_from_user(pte, (void __user *)pteg, sizeof(pte)))
|
|
goto done;
|
|
pte[0] = be64_to_cpu((__force __be64)pte[0]);
|
|
pte[1] = be64_to_cpu((__force __be64)pte[1]);
|
|
|
|
ret = H_NOT_FOUND;
|
|
if ((pte[0] & HPTE_V_VALID) == 0 ||
|
|
((flags & H_AVPN) && (pte[0] & ~0x7fUL) != avpn) ||
|
|
((flags & H_ANDCOND) && (pte[0] & avpn) != 0))
|
|
goto done;
|
|
|
|
ret = H_FUNCTION;
|
|
if (copy_to_user((void __user *)pteg, &v, sizeof(v)))
|
|
goto done;
|
|
|
|
rb = compute_tlbie_rb(pte[0], pte[1], pte_index);
|
|
vcpu->arch.mmu.tlbie(vcpu, rb, rb & 1 ? true : false);
|
|
|
|
ret = H_SUCCESS;
|
|
kvmppc_set_gpr(vcpu, 4, pte[0]);
|
|
kvmppc_set_gpr(vcpu, 5, pte[1]);
|
|
|
|
done:
|
|
mutex_unlock(&vcpu->kvm->arch.hpt_mutex);
|
|
kvmppc_set_gpr(vcpu, 3, ret);
|
|
|
|
return EMULATE_DONE;
|
|
}
|
|
|
|
/* Request defs for kvmppc_h_pr_bulk_remove() */
|
|
#define H_BULK_REMOVE_TYPE 0xc000000000000000ULL
|
|
#define H_BULK_REMOVE_REQUEST 0x4000000000000000ULL
|
|
#define H_BULK_REMOVE_RESPONSE 0x8000000000000000ULL
|
|
#define H_BULK_REMOVE_END 0xc000000000000000ULL
|
|
#define H_BULK_REMOVE_CODE 0x3000000000000000ULL
|
|
#define H_BULK_REMOVE_SUCCESS 0x0000000000000000ULL
|
|
#define H_BULK_REMOVE_NOT_FOUND 0x1000000000000000ULL
|
|
#define H_BULK_REMOVE_PARM 0x2000000000000000ULL
|
|
#define H_BULK_REMOVE_HW 0x3000000000000000ULL
|
|
#define H_BULK_REMOVE_RC 0x0c00000000000000ULL
|
|
#define H_BULK_REMOVE_FLAGS 0x0300000000000000ULL
|
|
#define H_BULK_REMOVE_ABSOLUTE 0x0000000000000000ULL
|
|
#define H_BULK_REMOVE_ANDCOND 0x0100000000000000ULL
|
|
#define H_BULK_REMOVE_AVPN 0x0200000000000000ULL
|
|
#define H_BULK_REMOVE_PTEX 0x00ffffffffffffffULL
|
|
#define H_BULK_REMOVE_MAX_BATCH 4
|
|
|
|
static int kvmppc_h_pr_bulk_remove(struct kvm_vcpu *vcpu)
|
|
{
|
|
int i;
|
|
int paramnr = 4;
|
|
int ret = H_SUCCESS;
|
|
|
|
mutex_lock(&vcpu->kvm->arch.hpt_mutex);
|
|
for (i = 0; i < H_BULK_REMOVE_MAX_BATCH; i++) {
|
|
unsigned long tsh = kvmppc_get_gpr(vcpu, paramnr+(2*i));
|
|
unsigned long tsl = kvmppc_get_gpr(vcpu, paramnr+(2*i)+1);
|
|
unsigned long pteg, rb, flags;
|
|
unsigned long pte[2];
|
|
unsigned long v = 0;
|
|
|
|
if ((tsh & H_BULK_REMOVE_TYPE) == H_BULK_REMOVE_END) {
|
|
break; /* Exit success */
|
|
} else if ((tsh & H_BULK_REMOVE_TYPE) !=
|
|
H_BULK_REMOVE_REQUEST) {
|
|
ret = H_PARAMETER;
|
|
break; /* Exit fail */
|
|
}
|
|
|
|
tsh &= H_BULK_REMOVE_PTEX | H_BULK_REMOVE_FLAGS;
|
|
tsh |= H_BULK_REMOVE_RESPONSE;
|
|
|
|
if ((tsh & H_BULK_REMOVE_ANDCOND) &&
|
|
(tsh & H_BULK_REMOVE_AVPN)) {
|
|
tsh |= H_BULK_REMOVE_PARM;
|
|
kvmppc_set_gpr(vcpu, paramnr+(2*i), tsh);
|
|
ret = H_PARAMETER;
|
|
break; /* Exit fail */
|
|
}
|
|
|
|
pteg = get_pteg_addr(vcpu, tsh & H_BULK_REMOVE_PTEX);
|
|
if (copy_from_user(pte, (void __user *)pteg, sizeof(pte))) {
|
|
ret = H_FUNCTION;
|
|
break;
|
|
}
|
|
pte[0] = be64_to_cpu((__force __be64)pte[0]);
|
|
pte[1] = be64_to_cpu((__force __be64)pte[1]);
|
|
|
|
/* tsl = AVPN */
|
|
flags = (tsh & H_BULK_REMOVE_FLAGS) >> 26;
|
|
|
|
if ((pte[0] & HPTE_V_VALID) == 0 ||
|
|
((flags & H_AVPN) && (pte[0] & ~0x7fUL) != tsl) ||
|
|
((flags & H_ANDCOND) && (pte[0] & tsl) != 0)) {
|
|
tsh |= H_BULK_REMOVE_NOT_FOUND;
|
|
} else {
|
|
/* Splat the pteg in (userland) hpt */
|
|
if (copy_to_user((void __user *)pteg, &v, sizeof(v))) {
|
|
ret = H_FUNCTION;
|
|
break;
|
|
}
|
|
|
|
rb = compute_tlbie_rb(pte[0], pte[1],
|
|
tsh & H_BULK_REMOVE_PTEX);
|
|
vcpu->arch.mmu.tlbie(vcpu, rb, rb & 1 ? true : false);
|
|
tsh |= H_BULK_REMOVE_SUCCESS;
|
|
tsh |= (pte[1] & (HPTE_R_C | HPTE_R_R)) << 43;
|
|
}
|
|
kvmppc_set_gpr(vcpu, paramnr+(2*i), tsh);
|
|
}
|
|
mutex_unlock(&vcpu->kvm->arch.hpt_mutex);
|
|
kvmppc_set_gpr(vcpu, 3, ret);
|
|
|
|
return EMULATE_DONE;
|
|
}
|
|
|
|
static int kvmppc_h_pr_protect(struct kvm_vcpu *vcpu)
|
|
{
|
|
unsigned long flags = kvmppc_get_gpr(vcpu, 4);
|
|
unsigned long pte_index = kvmppc_get_gpr(vcpu, 5);
|
|
unsigned long avpn = kvmppc_get_gpr(vcpu, 6);
|
|
unsigned long rb, pteg, r, v;
|
|
unsigned long pte[2];
|
|
long int ret;
|
|
|
|
pteg = get_pteg_addr(vcpu, pte_index);
|
|
mutex_lock(&vcpu->kvm->arch.hpt_mutex);
|
|
ret = H_FUNCTION;
|
|
if (copy_from_user(pte, (void __user *)pteg, sizeof(pte)))
|
|
goto done;
|
|
pte[0] = be64_to_cpu((__force __be64)pte[0]);
|
|
pte[1] = be64_to_cpu((__force __be64)pte[1]);
|
|
|
|
ret = H_NOT_FOUND;
|
|
if ((pte[0] & HPTE_V_VALID) == 0 ||
|
|
((flags & H_AVPN) && (pte[0] & ~0x7fUL) != avpn))
|
|
goto done;
|
|
|
|
v = pte[0];
|
|
r = pte[1];
|
|
r &= ~(HPTE_R_PP0 | HPTE_R_PP | HPTE_R_N | HPTE_R_KEY_HI |
|
|
HPTE_R_KEY_LO);
|
|
r |= (flags << 55) & HPTE_R_PP0;
|
|
r |= (flags << 48) & HPTE_R_KEY_HI;
|
|
r |= flags & (HPTE_R_PP | HPTE_R_N | HPTE_R_KEY_LO);
|
|
|
|
pte[1] = r;
|
|
|
|
rb = compute_tlbie_rb(v, r, pte_index);
|
|
vcpu->arch.mmu.tlbie(vcpu, rb, rb & 1 ? true : false);
|
|
pte[0] = (__force u64)cpu_to_be64(pte[0]);
|
|
pte[1] = (__force u64)cpu_to_be64(pte[1]);
|
|
ret = H_FUNCTION;
|
|
if (copy_to_user((void __user *)pteg, pte, sizeof(pte)))
|
|
goto done;
|
|
ret = H_SUCCESS;
|
|
|
|
done:
|
|
mutex_unlock(&vcpu->kvm->arch.hpt_mutex);
|
|
kvmppc_set_gpr(vcpu, 3, ret);
|
|
|
|
return EMULATE_DONE;
|
|
}
|
|
|
|
static int kvmppc_h_pr_logical_ci_load(struct kvm_vcpu *vcpu)
|
|
{
|
|
long rc;
|
|
|
|
rc = kvmppc_h_logical_ci_load(vcpu);
|
|
if (rc == H_TOO_HARD)
|
|
return EMULATE_FAIL;
|
|
kvmppc_set_gpr(vcpu, 3, rc);
|
|
return EMULATE_DONE;
|
|
}
|
|
|
|
static int kvmppc_h_pr_logical_ci_store(struct kvm_vcpu *vcpu)
|
|
{
|
|
long rc;
|
|
|
|
rc = kvmppc_h_logical_ci_store(vcpu);
|
|
if (rc == H_TOO_HARD)
|
|
return EMULATE_FAIL;
|
|
kvmppc_set_gpr(vcpu, 3, rc);
|
|
return EMULATE_DONE;
|
|
}
|
|
|
|
#ifdef CONFIG_SPAPR_TCE_IOMMU
|
|
static int kvmppc_h_pr_put_tce(struct kvm_vcpu *vcpu)
|
|
{
|
|
unsigned long liobn = kvmppc_get_gpr(vcpu, 4);
|
|
unsigned long ioba = kvmppc_get_gpr(vcpu, 5);
|
|
unsigned long tce = kvmppc_get_gpr(vcpu, 6);
|
|
long rc;
|
|
|
|
rc = kvmppc_h_put_tce(vcpu, liobn, ioba, tce);
|
|
if (rc == H_TOO_HARD)
|
|
return EMULATE_FAIL;
|
|
kvmppc_set_gpr(vcpu, 3, rc);
|
|
return EMULATE_DONE;
|
|
}
|
|
|
|
static int kvmppc_h_pr_put_tce_indirect(struct kvm_vcpu *vcpu)
|
|
{
|
|
unsigned long liobn = kvmppc_get_gpr(vcpu, 4);
|
|
unsigned long ioba = kvmppc_get_gpr(vcpu, 5);
|
|
unsigned long tce = kvmppc_get_gpr(vcpu, 6);
|
|
unsigned long npages = kvmppc_get_gpr(vcpu, 7);
|
|
long rc;
|
|
|
|
rc = kvmppc_h_put_tce_indirect(vcpu, liobn, ioba,
|
|
tce, npages);
|
|
if (rc == H_TOO_HARD)
|
|
return EMULATE_FAIL;
|
|
kvmppc_set_gpr(vcpu, 3, rc);
|
|
return EMULATE_DONE;
|
|
}
|
|
|
|
static int kvmppc_h_pr_stuff_tce(struct kvm_vcpu *vcpu)
|
|
{
|
|
unsigned long liobn = kvmppc_get_gpr(vcpu, 4);
|
|
unsigned long ioba = kvmppc_get_gpr(vcpu, 5);
|
|
unsigned long tce_value = kvmppc_get_gpr(vcpu, 6);
|
|
unsigned long npages = kvmppc_get_gpr(vcpu, 7);
|
|
long rc;
|
|
|
|
rc = kvmppc_h_stuff_tce(vcpu, liobn, ioba, tce_value, npages);
|
|
if (rc == H_TOO_HARD)
|
|
return EMULATE_FAIL;
|
|
kvmppc_set_gpr(vcpu, 3, rc);
|
|
return EMULATE_DONE;
|
|
}
|
|
|
|
#else /* CONFIG_SPAPR_TCE_IOMMU */
|
|
static int kvmppc_h_pr_put_tce(struct kvm_vcpu *vcpu)
|
|
{
|
|
return EMULATE_FAIL;
|
|
}
|
|
|
|
static int kvmppc_h_pr_put_tce_indirect(struct kvm_vcpu *vcpu)
|
|
{
|
|
return EMULATE_FAIL;
|
|
}
|
|
|
|
static int kvmppc_h_pr_stuff_tce(struct kvm_vcpu *vcpu)
|
|
{
|
|
return EMULATE_FAIL;
|
|
}
|
|
#endif /* CONFIG_SPAPR_TCE_IOMMU */
|
|
|
|
static int kvmppc_h_pr_xics_hcall(struct kvm_vcpu *vcpu, u32 cmd)
|
|
{
|
|
long rc = kvmppc_xics_hcall(vcpu, cmd);
|
|
kvmppc_set_gpr(vcpu, 3, rc);
|
|
return EMULATE_DONE;
|
|
}
|
|
|
|
int kvmppc_h_pr(struct kvm_vcpu *vcpu, unsigned long cmd)
|
|
{
|
|
int rc, idx;
|
|
|
|
if (cmd <= MAX_HCALL_OPCODE &&
|
|
!test_bit(cmd/4, vcpu->kvm->arch.enabled_hcalls))
|
|
return EMULATE_FAIL;
|
|
|
|
switch (cmd) {
|
|
case H_ENTER:
|
|
return kvmppc_h_pr_enter(vcpu);
|
|
case H_REMOVE:
|
|
return kvmppc_h_pr_remove(vcpu);
|
|
case H_PROTECT:
|
|
return kvmppc_h_pr_protect(vcpu);
|
|
case H_BULK_REMOVE:
|
|
return kvmppc_h_pr_bulk_remove(vcpu);
|
|
case H_PUT_TCE:
|
|
return kvmppc_h_pr_put_tce(vcpu);
|
|
case H_PUT_TCE_INDIRECT:
|
|
return kvmppc_h_pr_put_tce_indirect(vcpu);
|
|
case H_STUFF_TCE:
|
|
return kvmppc_h_pr_stuff_tce(vcpu);
|
|
case H_CEDE:
|
|
kvmppc_set_msr_fast(vcpu, kvmppc_get_msr(vcpu) | MSR_EE);
|
|
kvm_vcpu_block(vcpu);
|
|
kvm_clear_request(KVM_REQ_UNHALT, vcpu);
|
|
vcpu->stat.halt_wakeup++;
|
|
return EMULATE_DONE;
|
|
case H_LOGICAL_CI_LOAD:
|
|
return kvmppc_h_pr_logical_ci_load(vcpu);
|
|
case H_LOGICAL_CI_STORE:
|
|
return kvmppc_h_pr_logical_ci_store(vcpu);
|
|
case H_XIRR:
|
|
case H_CPPR:
|
|
case H_EOI:
|
|
case H_IPI:
|
|
case H_IPOLL:
|
|
case H_XIRR_X:
|
|
if (kvmppc_xics_enabled(vcpu))
|
|
return kvmppc_h_pr_xics_hcall(vcpu, cmd);
|
|
break;
|
|
case H_RTAS:
|
|
if (list_empty(&vcpu->kvm->arch.rtas_tokens))
|
|
break;
|
|
idx = srcu_read_lock(&vcpu->kvm->srcu);
|
|
rc = kvmppc_rtas_hcall(vcpu);
|
|
srcu_read_unlock(&vcpu->kvm->srcu, idx);
|
|
if (rc)
|
|
break;
|
|
kvmppc_set_gpr(vcpu, 3, 0);
|
|
return EMULATE_DONE;
|
|
}
|
|
|
|
return EMULATE_FAIL;
|
|
}
|
|
|
|
int kvmppc_hcall_impl_pr(unsigned long cmd)
|
|
{
|
|
switch (cmd) {
|
|
case H_ENTER:
|
|
case H_REMOVE:
|
|
case H_PROTECT:
|
|
case H_BULK_REMOVE:
|
|
case H_PUT_TCE:
|
|
case H_PUT_TCE_INDIRECT:
|
|
case H_STUFF_TCE:
|
|
case H_CEDE:
|
|
case H_LOGICAL_CI_LOAD:
|
|
case H_LOGICAL_CI_STORE:
|
|
#ifdef CONFIG_KVM_XICS
|
|
case H_XIRR:
|
|
case H_CPPR:
|
|
case H_EOI:
|
|
case H_IPI:
|
|
case H_IPOLL:
|
|
case H_XIRR_X:
|
|
#endif
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* List of hcall numbers to enable by default.
|
|
* For compatibility with old userspace, we enable by default
|
|
* all hcalls that were implemented before the hcall-enabling
|
|
* facility was added. Note this list should not include H_RTAS.
|
|
*/
|
|
static unsigned int default_hcall_list[] = {
|
|
H_ENTER,
|
|
H_REMOVE,
|
|
H_PROTECT,
|
|
H_BULK_REMOVE,
|
|
H_PUT_TCE,
|
|
H_CEDE,
|
|
#ifdef CONFIG_KVM_XICS
|
|
H_XIRR,
|
|
H_CPPR,
|
|
H_EOI,
|
|
H_IPI,
|
|
H_IPOLL,
|
|
H_XIRR_X,
|
|
#endif
|
|
0
|
|
};
|
|
|
|
void kvmppc_pr_init_default_hcalls(struct kvm *kvm)
|
|
{
|
|
int i;
|
|
unsigned int hcall;
|
|
|
|
for (i = 0; default_hcall_list[i]; ++i) {
|
|
hcall = default_hcall_list[i];
|
|
WARN_ON(!kvmppc_hcall_impl_pr(hcall));
|
|
__set_bit(hcall / 4, kvm->arch.enabled_hcalls);
|
|
}
|
|
}
|