forked from Minki/linux
a2932923cc
A new ioctl, KVM_PPC_GET_HTAB_FD, returns a file descriptor. Reads on this fd return the contents of the HPT (hashed page table), writes create and/or remove entries in the HPT. There is a new capability, KVM_CAP_PPC_HTAB_FD, to indicate the presence of the ioctl. The ioctl takes an argument structure with the index of the first HPT entry to read out and a set of flags. The flags indicate whether the user is intending to read or write the HPT, and whether to return all entries or only the "bolted" entries (those with the bolted bit, 0x10, set in the first doubleword). This is intended for use in implementing qemu's savevm/loadvm and for live migration. Therefore, on reads, the first pass returns information about all HPTEs (or all bolted HPTEs). When the first pass reaches the end of the HPT, it returns from the read. Subsequent reads only return information about HPTEs that have changed since they were last read. A read that finds no changed HPTEs in the HPT following where the last read finished will return 0 bytes. The format of the data provides a simple run-length compression of the invalid entries. Each block of data starts with a header that indicates the index (position in the HPT, which is just an array), the number of valid entries starting at that index (may be zero), and the number of invalid entries following those valid entries. The valid entries, 16 bytes each, follow the header. The invalid entries are not explicitly represented. Signed-off-by: Paul Mackerras <paulus@samba.org> [agraf: fix documentation] Signed-off-by: Alexander Graf <agraf@suse.de>
415 lines
11 KiB
C
415 lines
11 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, version 2, as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Copyright IBM Corp. 2007
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*
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* Authors: Hollis Blanchard <hollisb@us.ibm.com>
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*/
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#ifndef __LINUX_KVM_POWERPC_H
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#define __LINUX_KVM_POWERPC_H
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#include <linux/types.h>
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/* Select powerpc specific features in <linux/kvm.h> */
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#define __KVM_HAVE_SPAPR_TCE
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#define __KVM_HAVE_PPC_SMT
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struct kvm_regs {
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__u64 pc;
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__u64 cr;
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__u64 ctr;
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__u64 lr;
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__u64 xer;
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__u64 msr;
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__u64 srr0;
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__u64 srr1;
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__u64 pid;
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__u64 sprg0;
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__u64 sprg1;
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__u64 sprg2;
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__u64 sprg3;
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__u64 sprg4;
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__u64 sprg5;
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__u64 sprg6;
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__u64 sprg7;
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__u64 gpr[32];
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};
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#define KVM_SREGS_E_IMPL_NONE 0
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#define KVM_SREGS_E_IMPL_FSL 1
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#define KVM_SREGS_E_FSL_PIDn (1 << 0) /* PID1/PID2 */
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/*
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* Feature bits indicate which sections of the sregs struct are valid,
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* both in KVM_GET_SREGS and KVM_SET_SREGS. On KVM_SET_SREGS, registers
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* corresponding to unset feature bits will not be modified. This allows
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* restoring a checkpoint made without that feature, while keeping the
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* default values of the new registers.
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*
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* KVM_SREGS_E_BASE contains:
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* CSRR0/1 (refers to SRR2/3 on 40x)
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* ESR
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* DEAR
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* MCSR
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* TSR
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* TCR
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* DEC
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* TB
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* VRSAVE (USPRG0)
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*/
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#define KVM_SREGS_E_BASE (1 << 0)
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/*
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* KVM_SREGS_E_ARCH206 contains:
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*
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* PIR
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* MCSRR0/1
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* DECAR
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* IVPR
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*/
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#define KVM_SREGS_E_ARCH206 (1 << 1)
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/*
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* Contains EPCR, plus the upper half of 64-bit registers
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* that are 32-bit on 32-bit implementations.
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*/
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#define KVM_SREGS_E_64 (1 << 2)
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#define KVM_SREGS_E_SPRG8 (1 << 3)
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#define KVM_SREGS_E_MCIVPR (1 << 4)
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/*
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* IVORs are used -- contains IVOR0-15, plus additional IVORs
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* in combination with an appropriate feature bit.
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*/
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#define KVM_SREGS_E_IVOR (1 << 5)
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/*
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* Contains MAS0-4, MAS6-7, TLBnCFG, MMUCFG.
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* Also TLBnPS if MMUCFG[MAVN] = 1.
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*/
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#define KVM_SREGS_E_ARCH206_MMU (1 << 6)
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/* DBSR, DBCR, IAC, DAC, DVC */
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#define KVM_SREGS_E_DEBUG (1 << 7)
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/* Enhanced debug -- DSRR0/1, SPRG9 */
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#define KVM_SREGS_E_ED (1 << 8)
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/* Embedded Floating Point (SPE) -- IVOR32-34 if KVM_SREGS_E_IVOR */
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#define KVM_SREGS_E_SPE (1 << 9)
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/* External Proxy (EXP) -- EPR */
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#define KVM_SREGS_EXP (1 << 10)
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/* External PID (E.PD) -- EPSC/EPLC */
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#define KVM_SREGS_E_PD (1 << 11)
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/* Processor Control (E.PC) -- IVOR36-37 if KVM_SREGS_E_IVOR */
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#define KVM_SREGS_E_PC (1 << 12)
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/* Page table (E.PT) -- EPTCFG */
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#define KVM_SREGS_E_PT (1 << 13)
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/* Embedded Performance Monitor (E.PM) -- IVOR35 if KVM_SREGS_E_IVOR */
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#define KVM_SREGS_E_PM (1 << 14)
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/*
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* Special updates:
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*
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* Some registers may change even while a vcpu is not running.
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* To avoid losing these changes, by default these registers are
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* not updated by KVM_SET_SREGS. To force an update, set the bit
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* in u.e.update_special corresponding to the register to be updated.
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*
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* The update_special field is zero on return from KVM_GET_SREGS.
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*
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* When restoring a checkpoint, the caller can set update_special
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* to 0xffffffff to ensure that everything is restored, even new features
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* that the caller doesn't know about.
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*/
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#define KVM_SREGS_E_UPDATE_MCSR (1 << 0)
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#define KVM_SREGS_E_UPDATE_TSR (1 << 1)
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#define KVM_SREGS_E_UPDATE_DEC (1 << 2)
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#define KVM_SREGS_E_UPDATE_DBSR (1 << 3)
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/*
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* In KVM_SET_SREGS, reserved/pad fields must be left untouched from a
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* previous KVM_GET_REGS.
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*
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* Unless otherwise indicated, setting any register with KVM_SET_SREGS
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* directly sets its value. It does not trigger any special semantics such
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* as write-one-to-clear. Calling KVM_SET_SREGS on an unmodified struct
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* just received from KVM_GET_SREGS is always a no-op.
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*/
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struct kvm_sregs {
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__u32 pvr;
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union {
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struct {
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__u64 sdr1;
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struct {
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struct {
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__u64 slbe;
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__u64 slbv;
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} slb[64];
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} ppc64;
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struct {
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__u32 sr[16];
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__u64 ibat[8];
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__u64 dbat[8];
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} ppc32;
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} s;
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struct {
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union {
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struct { /* KVM_SREGS_E_IMPL_FSL */
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__u32 features; /* KVM_SREGS_E_FSL_ */
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__u32 svr;
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__u64 mcar;
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__u32 hid0;
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/* KVM_SREGS_E_FSL_PIDn */
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__u32 pid1, pid2;
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} fsl;
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__u8 pad[256];
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} impl;
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__u32 features; /* KVM_SREGS_E_ */
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__u32 impl_id; /* KVM_SREGS_E_IMPL_ */
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__u32 update_special; /* KVM_SREGS_E_UPDATE_ */
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__u32 pir; /* read-only */
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__u64 sprg8;
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__u64 sprg9; /* E.ED */
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__u64 csrr0;
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__u64 dsrr0; /* E.ED */
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__u64 mcsrr0;
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__u32 csrr1;
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__u32 dsrr1; /* E.ED */
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__u32 mcsrr1;
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__u32 esr;
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__u64 dear;
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__u64 ivpr;
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__u64 mcivpr;
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__u64 mcsr; /* KVM_SREGS_E_UPDATE_MCSR */
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__u32 tsr; /* KVM_SREGS_E_UPDATE_TSR */
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__u32 tcr;
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__u32 decar;
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__u32 dec; /* KVM_SREGS_E_UPDATE_DEC */
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/*
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* Userspace can read TB directly, but the
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* value reported here is consistent with "dec".
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*
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* Read-only.
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*/
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__u64 tb;
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__u32 dbsr; /* KVM_SREGS_E_UPDATE_DBSR */
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__u32 dbcr[3];
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/*
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* iac/dac registers are 64bit wide, while this API
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* interface provides only lower 32 bits on 64 bit
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* processors. ONE_REG interface is added for 64bit
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* iac/dac registers.
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*/
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__u32 iac[4];
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__u32 dac[2];
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__u32 dvc[2];
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__u8 num_iac; /* read-only */
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__u8 num_dac; /* read-only */
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__u8 num_dvc; /* read-only */
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__u8 pad;
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__u32 epr; /* EXP */
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__u32 vrsave; /* a.k.a. USPRG0 */
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__u32 epcr; /* KVM_SREGS_E_64 */
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__u32 mas0;
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__u32 mas1;
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__u64 mas2;
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__u64 mas7_3;
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__u32 mas4;
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__u32 mas6;
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__u32 ivor_low[16]; /* IVOR0-15 */
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__u32 ivor_high[18]; /* IVOR32+, plus room to expand */
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__u32 mmucfg; /* read-only */
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__u32 eptcfg; /* E.PT, read-only */
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__u32 tlbcfg[4];/* read-only */
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__u32 tlbps[4]; /* read-only */
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__u32 eplc, epsc; /* E.PD */
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} e;
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__u8 pad[1020];
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} u;
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};
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struct kvm_fpu {
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__u64 fpr[32];
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};
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struct kvm_debug_exit_arch {
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};
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/* for KVM_SET_GUEST_DEBUG */
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struct kvm_guest_debug_arch {
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};
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/* definition of registers in kvm_run */
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struct kvm_sync_regs {
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};
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#define KVM_INTERRUPT_SET -1U
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#define KVM_INTERRUPT_UNSET -2U
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#define KVM_INTERRUPT_SET_LEVEL -3U
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#define KVM_CPU_440 1
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#define KVM_CPU_E500V2 2
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#define KVM_CPU_3S_32 3
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#define KVM_CPU_3S_64 4
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#define KVM_CPU_E500MC 5
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/* for KVM_CAP_SPAPR_TCE */
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struct kvm_create_spapr_tce {
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__u64 liobn;
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__u32 window_size;
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};
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/* for KVM_ALLOCATE_RMA */
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struct kvm_allocate_rma {
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__u64 rma_size;
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};
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struct kvm_book3e_206_tlb_entry {
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__u32 mas8;
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__u32 mas1;
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__u64 mas2;
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__u64 mas7_3;
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};
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struct kvm_book3e_206_tlb_params {
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/*
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* For mmu types KVM_MMU_FSL_BOOKE_NOHV and KVM_MMU_FSL_BOOKE_HV:
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*
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* - The number of ways of TLB0 must be a power of two between 2 and
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* 16.
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* - TLB1 must be fully associative.
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* - The size of TLB0 must be a multiple of the number of ways, and
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* the number of sets must be a power of two.
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* - The size of TLB1 may not exceed 64 entries.
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* - TLB0 supports 4 KiB pages.
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* - The page sizes supported by TLB1 are as indicated by
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* TLB1CFG (if MMUCFG[MAVN] = 0) or TLB1PS (if MMUCFG[MAVN] = 1)
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* as returned by KVM_GET_SREGS.
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* - TLB2 and TLB3 are reserved, and their entries in tlb_sizes[]
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* and tlb_ways[] must be zero.
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*
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* tlb_ways[n] = tlb_sizes[n] means the array is fully associative.
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*
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* KVM will adjust TLBnCFG based on the sizes configured here,
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* though arrays greater than 2048 entries will have TLBnCFG[NENTRY]
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* set to zero.
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*/
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__u32 tlb_sizes[4];
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__u32 tlb_ways[4];
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__u32 reserved[8];
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};
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/* For KVM_PPC_GET_HTAB_FD */
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struct kvm_get_htab_fd {
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__u64 flags;
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__u64 start_index;
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__u64 reserved[2];
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};
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/* Values for kvm_get_htab_fd.flags */
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#define KVM_GET_HTAB_BOLTED_ONLY ((__u64)0x1)
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#define KVM_GET_HTAB_WRITE ((__u64)0x2)
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/*
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* Data read on the file descriptor is formatted as a series of
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* records, each consisting of a header followed by a series of
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* `n_valid' HPTEs (16 bytes each), which are all valid. Following
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* those valid HPTEs there are `n_invalid' invalid HPTEs, which
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* are not represented explicitly in the stream. The same format
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* is used for writing.
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*/
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struct kvm_get_htab_header {
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__u32 index;
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__u16 n_valid;
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__u16 n_invalid;
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};
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#define KVM_REG_PPC_HIOR (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x1)
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#define KVM_REG_PPC_IAC1 (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x2)
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#define KVM_REG_PPC_IAC2 (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x3)
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#define KVM_REG_PPC_IAC3 (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x4)
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#define KVM_REG_PPC_IAC4 (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x5)
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#define KVM_REG_PPC_DAC1 (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x6)
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#define KVM_REG_PPC_DAC2 (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x7)
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#define KVM_REG_PPC_DABR (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x8)
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#define KVM_REG_PPC_DSCR (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x9)
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#define KVM_REG_PPC_PURR (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0xa)
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#define KVM_REG_PPC_SPURR (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0xb)
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#define KVM_REG_PPC_DAR (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0xc)
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#define KVM_REG_PPC_DSISR (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0xd)
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#define KVM_REG_PPC_AMR (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0xe)
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#define KVM_REG_PPC_UAMOR (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0xf)
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#define KVM_REG_PPC_MMCR0 (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x10)
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#define KVM_REG_PPC_MMCR1 (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x11)
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#define KVM_REG_PPC_MMCRA (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x12)
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#define KVM_REG_PPC_PMC1 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x18)
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#define KVM_REG_PPC_PMC2 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x19)
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#define KVM_REG_PPC_PMC3 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x1a)
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#define KVM_REG_PPC_PMC4 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x1b)
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#define KVM_REG_PPC_PMC5 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x1c)
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#define KVM_REG_PPC_PMC6 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x1d)
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#define KVM_REG_PPC_PMC7 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x1e)
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#define KVM_REG_PPC_PMC8 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x1f)
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/* 32 floating-point registers */
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#define KVM_REG_PPC_FPR0 (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x20)
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#define KVM_REG_PPC_FPR(n) (KVM_REG_PPC_FPR0 + (n))
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#define KVM_REG_PPC_FPR31 (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x3f)
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/* 32 VMX/Altivec vector registers */
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#define KVM_REG_PPC_VR0 (KVM_REG_PPC | KVM_REG_SIZE_U128 | 0x40)
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#define KVM_REG_PPC_VR(n) (KVM_REG_PPC_VR0 + (n))
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#define KVM_REG_PPC_VR31 (KVM_REG_PPC | KVM_REG_SIZE_U128 | 0x5f)
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/* 32 double-width FP registers for VSX */
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/* High-order halves overlap with FP regs */
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#define KVM_REG_PPC_VSR0 (KVM_REG_PPC | KVM_REG_SIZE_U128 | 0x60)
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#define KVM_REG_PPC_VSR(n) (KVM_REG_PPC_VSR0 + (n))
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#define KVM_REG_PPC_VSR31 (KVM_REG_PPC | KVM_REG_SIZE_U128 | 0x7f)
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/* FP and vector status/control registers */
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#define KVM_REG_PPC_FPSCR (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x80)
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#define KVM_REG_PPC_VSCR (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x81)
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/* Virtual processor areas */
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/* For SLB & DTL, address in high (first) half, length in low half */
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#define KVM_REG_PPC_VPA_ADDR (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x82)
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#define KVM_REG_PPC_VPA_SLB (KVM_REG_PPC | KVM_REG_SIZE_U128 | 0x83)
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#define KVM_REG_PPC_VPA_DTL (KVM_REG_PPC | KVM_REG_SIZE_U128 | 0x84)
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#endif /* __LINUX_KVM_POWERPC_H */
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