From 3b65142002cb72ee4d81dbd432a501e21dd836a6 Mon Sep 17 00:00:00 2001 From: Sean Christopherson Date: Wed, 4 Mar 2020 17:34:33 -0800 Subject: [PATCH] KVM x86: Extend AMD specific guest behavior to Hygon virtual CPUs Extend guest_cpuid_is_amd() to cover Hygon virtual CPUs and rename it accordingly. Hygon CPUs use an AMD-based core and so have the same basic behavior as AMD CPUs. Fixes: 8177cff6e1d03 ("x86/kvm: Add Hygon Dhyana support to KVM") Cc: Pu Wen Signed-off-by: Sean Christopherson Signed-off-by: Paolo Bonzini --- arch/x86/kvm/cpuid.c | 2 +- arch/x86/kvm/cpuid.h | 6 ++++-- arch/x86/kvm/mmu/mmu.c | 3 ++- arch/x86/kvm/x86.c | 2 +- 4 files changed, 8 insertions(+), 5 deletions(-) diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index a25b520d26c9d..ec91b9b127fae 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -946,7 +946,7 @@ bool kvm_cpuid(struct kvm_vcpu *vcpu, u32 *eax, u32 *ebx, * requested. AMD CPUID semantics returns all zeroes for any * undefined leaf, whether or not the leaf is in range. */ - if (!entry && check_limit && !guest_cpuid_is_amd(vcpu) && + if (!entry && check_limit && !guest_cpuid_is_amd_or_hygon(vcpu) && !cpuid_function_in_range(vcpu, function)) { max = kvm_find_cpuid_entry(vcpu, 0, 0); if (max) { diff --git a/arch/x86/kvm/cpuid.h b/arch/x86/kvm/cpuid.h index cccfd854aacf6..a0988609f6207 100644 --- a/arch/x86/kvm/cpuid.h +++ b/arch/x86/kvm/cpuid.h @@ -214,12 +214,14 @@ static __always_inline void guest_cpuid_clear(struct kvm_vcpu *vcpu, *reg &= ~__feature_bit(x86_feature); } -static inline bool guest_cpuid_is_amd(struct kvm_vcpu *vcpu) +static inline bool guest_cpuid_is_amd_or_hygon(struct kvm_vcpu *vcpu) { struct kvm_cpuid_entry2 *best; best = kvm_find_cpuid_entry(vcpu, 0, 0); - return best && is_guest_vendor_amd(best->ebx, best->ecx, best->edx); + return best && + (is_guest_vendor_amd(best->ebx, best->ecx, best->edx) || + is_guest_vendor_hygon(best->ebx, best->ecx, best->edx)); } static inline int guest_cpuid_family(struct kvm_vcpu *vcpu) diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 554546948e879..f1eb2d3e1f40e 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -4510,7 +4510,8 @@ static void reset_rsvds_bits_mask(struct kvm_vcpu *vcpu, cpuid_maxphyaddr(vcpu), context->root_level, context->nx, guest_cpuid_has(vcpu, X86_FEATURE_GBPAGES), - is_pse(vcpu), guest_cpuid_is_amd(vcpu)); + is_pse(vcpu), + guest_cpuid_is_amd_or_hygon(vcpu)); } static void diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 96e897d38a63b..cda0b787b2e3e 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -2550,7 +2550,7 @@ static void kvmclock_sync_fn(struct work_struct *work) static bool can_set_mci_status(struct kvm_vcpu *vcpu) { /* McStatusWrEn enabled? */ - if (guest_cpuid_is_amd(vcpu)) + if (guest_cpuid_is_amd_or_hygon(vcpu)) return !!(vcpu->arch.msr_hwcr & BIT_ULL(18)); return false; -- 2.39.5