mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-11 21:14:07 +08:00
34059c2570
Handle caching CR3 (from VMX's VMCS) into struct kvm_vcpu via the common
cache_reg() callback and drop the dedicated decache_cr3(). The name
decache_cr3() is somewhat confusing as the caching behavior of CR3
follows that of GPRs, RFLAGS and PDPTRs, (handled via cache_reg()), and
has nothing in common with the caching behavior of CR0/CR4 (whose
decache_cr{0,4}_guest_bits() likely provided the 'decache' verbiage).
This would effectivel adds a BUG() if KVM attempts to cache CR3 on SVM.
Change it to a WARN_ON_ONCE() -- if the cache never requires filling,
the value is already in the right place -- and opportunistically add one
in VMX to provide an equivalent check.
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
181 lines
4.7 KiB
C
181 lines
4.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef ASM_KVM_CACHE_REGS_H
|
|
#define ASM_KVM_CACHE_REGS_H
|
|
|
|
#include <linux/kvm_host.h>
|
|
|
|
#define KVM_POSSIBLE_CR0_GUEST_BITS X86_CR0_TS
|
|
#define KVM_POSSIBLE_CR4_GUEST_BITS \
|
|
(X86_CR4_PVI | X86_CR4_DE | X86_CR4_PCE | X86_CR4_OSFXSR \
|
|
| X86_CR4_OSXMMEXCPT | X86_CR4_LA57 | X86_CR4_PGE)
|
|
|
|
#define BUILD_KVM_GPR_ACCESSORS(lname, uname) \
|
|
static __always_inline unsigned long kvm_##lname##_read(struct kvm_vcpu *vcpu)\
|
|
{ \
|
|
return vcpu->arch.regs[VCPU_REGS_##uname]; \
|
|
} \
|
|
static __always_inline void kvm_##lname##_write(struct kvm_vcpu *vcpu, \
|
|
unsigned long val) \
|
|
{ \
|
|
vcpu->arch.regs[VCPU_REGS_##uname] = val; \
|
|
}
|
|
BUILD_KVM_GPR_ACCESSORS(rax, RAX)
|
|
BUILD_KVM_GPR_ACCESSORS(rbx, RBX)
|
|
BUILD_KVM_GPR_ACCESSORS(rcx, RCX)
|
|
BUILD_KVM_GPR_ACCESSORS(rdx, RDX)
|
|
BUILD_KVM_GPR_ACCESSORS(rbp, RBP)
|
|
BUILD_KVM_GPR_ACCESSORS(rsi, RSI)
|
|
BUILD_KVM_GPR_ACCESSORS(rdi, RDI)
|
|
#ifdef CONFIG_X86_64
|
|
BUILD_KVM_GPR_ACCESSORS(r8, R8)
|
|
BUILD_KVM_GPR_ACCESSORS(r9, R9)
|
|
BUILD_KVM_GPR_ACCESSORS(r10, R10)
|
|
BUILD_KVM_GPR_ACCESSORS(r11, R11)
|
|
BUILD_KVM_GPR_ACCESSORS(r12, R12)
|
|
BUILD_KVM_GPR_ACCESSORS(r13, R13)
|
|
BUILD_KVM_GPR_ACCESSORS(r14, R14)
|
|
BUILD_KVM_GPR_ACCESSORS(r15, R15)
|
|
#endif
|
|
|
|
static inline bool kvm_register_is_available(struct kvm_vcpu *vcpu,
|
|
enum kvm_reg reg)
|
|
{
|
|
return test_bit(reg, (unsigned long *)&vcpu->arch.regs_avail);
|
|
}
|
|
|
|
static inline bool kvm_register_is_dirty(struct kvm_vcpu *vcpu,
|
|
enum kvm_reg reg)
|
|
{
|
|
return test_bit(reg, (unsigned long *)&vcpu->arch.regs_dirty);
|
|
}
|
|
|
|
static inline void kvm_register_mark_available(struct kvm_vcpu *vcpu,
|
|
enum kvm_reg reg)
|
|
{
|
|
__set_bit(reg, (unsigned long *)&vcpu->arch.regs_avail);
|
|
}
|
|
|
|
static inline void kvm_register_mark_dirty(struct kvm_vcpu *vcpu,
|
|
enum kvm_reg reg)
|
|
{
|
|
__set_bit(reg, (unsigned long *)&vcpu->arch.regs_avail);
|
|
__set_bit(reg, (unsigned long *)&vcpu->arch.regs_dirty);
|
|
}
|
|
|
|
static inline unsigned long kvm_register_read(struct kvm_vcpu *vcpu, int reg)
|
|
{
|
|
if (WARN_ON_ONCE((unsigned int)reg >= NR_VCPU_REGS))
|
|
return 0;
|
|
|
|
if (!kvm_register_is_available(vcpu, reg))
|
|
kvm_x86_ops->cache_reg(vcpu, reg);
|
|
|
|
return vcpu->arch.regs[reg];
|
|
}
|
|
|
|
static inline void kvm_register_write(struct kvm_vcpu *vcpu, int reg,
|
|
unsigned long val)
|
|
{
|
|
if (WARN_ON_ONCE((unsigned int)reg >= NR_VCPU_REGS))
|
|
return;
|
|
|
|
vcpu->arch.regs[reg] = val;
|
|
kvm_register_mark_dirty(vcpu, reg);
|
|
}
|
|
|
|
static inline unsigned long kvm_rip_read(struct kvm_vcpu *vcpu)
|
|
{
|
|
return kvm_register_read(vcpu, VCPU_REGS_RIP);
|
|
}
|
|
|
|
static inline void kvm_rip_write(struct kvm_vcpu *vcpu, unsigned long val)
|
|
{
|
|
kvm_register_write(vcpu, VCPU_REGS_RIP, val);
|
|
}
|
|
|
|
static inline unsigned long kvm_rsp_read(struct kvm_vcpu *vcpu)
|
|
{
|
|
return kvm_register_read(vcpu, VCPU_REGS_RSP);
|
|
}
|
|
|
|
static inline void kvm_rsp_write(struct kvm_vcpu *vcpu, unsigned long val)
|
|
{
|
|
kvm_register_write(vcpu, VCPU_REGS_RSP, val);
|
|
}
|
|
|
|
static inline u64 kvm_pdptr_read(struct kvm_vcpu *vcpu, int index)
|
|
{
|
|
might_sleep(); /* on svm */
|
|
|
|
if (!kvm_register_is_available(vcpu, VCPU_EXREG_PDPTR))
|
|
kvm_x86_ops->cache_reg(vcpu, VCPU_EXREG_PDPTR);
|
|
|
|
return vcpu->arch.walk_mmu->pdptrs[index];
|
|
}
|
|
|
|
static inline ulong kvm_read_cr0_bits(struct kvm_vcpu *vcpu, ulong mask)
|
|
{
|
|
ulong tmask = mask & KVM_POSSIBLE_CR0_GUEST_BITS;
|
|
if (tmask & vcpu->arch.cr0_guest_owned_bits)
|
|
kvm_x86_ops->decache_cr0_guest_bits(vcpu);
|
|
return vcpu->arch.cr0 & mask;
|
|
}
|
|
|
|
static inline ulong kvm_read_cr0(struct kvm_vcpu *vcpu)
|
|
{
|
|
return kvm_read_cr0_bits(vcpu, ~0UL);
|
|
}
|
|
|
|
static inline ulong kvm_read_cr4_bits(struct kvm_vcpu *vcpu, ulong mask)
|
|
{
|
|
ulong tmask = mask & KVM_POSSIBLE_CR4_GUEST_BITS;
|
|
if (tmask & vcpu->arch.cr4_guest_owned_bits)
|
|
kvm_x86_ops->decache_cr4_guest_bits(vcpu);
|
|
return vcpu->arch.cr4 & mask;
|
|
}
|
|
|
|
static inline ulong kvm_read_cr3(struct kvm_vcpu *vcpu)
|
|
{
|
|
if (!kvm_register_is_available(vcpu, VCPU_EXREG_CR3))
|
|
kvm_x86_ops->cache_reg(vcpu, VCPU_EXREG_CR3);
|
|
return vcpu->arch.cr3;
|
|
}
|
|
|
|
static inline ulong kvm_read_cr4(struct kvm_vcpu *vcpu)
|
|
{
|
|
return kvm_read_cr4_bits(vcpu, ~0UL);
|
|
}
|
|
|
|
static inline u64 kvm_read_edx_eax(struct kvm_vcpu *vcpu)
|
|
{
|
|
return (kvm_rax_read(vcpu) & -1u)
|
|
| ((u64)(kvm_rdx_read(vcpu) & -1u) << 32);
|
|
}
|
|
|
|
static inline void enter_guest_mode(struct kvm_vcpu *vcpu)
|
|
{
|
|
vcpu->arch.hflags |= HF_GUEST_MASK;
|
|
}
|
|
|
|
static inline void leave_guest_mode(struct kvm_vcpu *vcpu)
|
|
{
|
|
vcpu->arch.hflags &= ~HF_GUEST_MASK;
|
|
|
|
if (vcpu->arch.load_eoi_exitmap_pending) {
|
|
vcpu->arch.load_eoi_exitmap_pending = false;
|
|
kvm_make_request(KVM_REQ_LOAD_EOI_EXITMAP, vcpu);
|
|
}
|
|
}
|
|
|
|
static inline bool is_guest_mode(struct kvm_vcpu *vcpu)
|
|
{
|
|
return vcpu->arch.hflags & HF_GUEST_MASK;
|
|
}
|
|
|
|
static inline bool is_smm(struct kvm_vcpu *vcpu)
|
|
{
|
|
return vcpu->arch.hflags & HF_SMM_MASK;
|
|
}
|
|
|
|
#endif
|