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| author | Sean Christopherson <seanjc@google.com> | 2021-06-22 10:57:10 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-06-24 18:00:41 -0400 |
| commit | 6066772455f21ce1e90f003243c9864091621773 (patch) | |
| tree | 978e5125f483f257722e5ef3385d96c2aad5862c /arch/x86/kvm/mmu/mmu.c | |
| parent | 167f8a5cae99fb2050d3d674ca84457a526e23dd (diff) | |
| download | lwn-6066772455f21ce1e90f003243c9864091621773.tar.gz lwn-6066772455f21ce1e90f003243c9864091621773.zip | |
KVM: x86/mmu: Add accessors to query mmu_role bits
Add accessors via a builder macro for all mmu_role bits that track a CR0,
CR4, or EFER bit, abstracting whether the bits are in the base or the
extended role.
Future commits will switch to using mmu_role instead of vCPU state to
configure the MMU, i.e. there are about to be a large number of users.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210622175739.3610207-26-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/mmu/mmu.c')
| -rw-r--r-- | arch/x86/kvm/mmu/mmu.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 25f23de89cdf..1e5beac6920f 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -206,6 +206,27 @@ BUILD_MMU_ROLE_REGS_ACCESSOR(cr4, la57, X86_CR4_LA57); BUILD_MMU_ROLE_REGS_ACCESSOR(efer, nx, EFER_NX); BUILD_MMU_ROLE_REGS_ACCESSOR(efer, lma, EFER_LMA); +/* + * The MMU itself (with a valid role) is the single source of truth for the + * MMU. Do not use the regs used to build the MMU/role, nor the vCPU. The + * regs don't account for dependencies, e.g. clearing CR4 bits if CR0.PG=1, + * and the vCPU may be incorrect/irrelevant. + */ +#define BUILD_MMU_ROLE_ACCESSOR(base_or_ext, reg, name) \ +static inline bool is_##reg##_##name(struct kvm_mmu *mmu) \ +{ \ + return !!(mmu->mmu_role. base_or_ext . reg##_##name); \ +} +BUILD_MMU_ROLE_ACCESSOR(ext, cr0, pg); +BUILD_MMU_ROLE_ACCESSOR(base, cr0, wp); +BUILD_MMU_ROLE_ACCESSOR(ext, cr4, pse); +BUILD_MMU_ROLE_ACCESSOR(ext, cr4, pae); +BUILD_MMU_ROLE_ACCESSOR(ext, cr4, smep); +BUILD_MMU_ROLE_ACCESSOR(ext, cr4, smap); +BUILD_MMU_ROLE_ACCESSOR(ext, cr4, pke); +BUILD_MMU_ROLE_ACCESSOR(ext, cr4, la57); +BUILD_MMU_ROLE_ACCESSOR(base, efer, nx); + static struct kvm_mmu_role_regs vcpu_to_role_regs(struct kvm_vcpu *vcpu) { struct kvm_mmu_role_regs regs = { |