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| author | Eric Northup <digitaleric@gmail.com> | 2020-04-14 18:23:20 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-04-15 12:08:41 -0400 |
| commit | 43d05de2bee7561b7958628b7c27c89b779de990 (patch) | |
| tree | 9daf60c61357743b1ad8b1b555c8f91e69a96876 | |
| parent | 24647e0a39b6c5ef007fa2f9a91ac8b581e093b9 (diff) | |
| download | linux-43d05de2bee7561b7958628b7c27c89b779de990.tar.bz2 | |
KVM: pass through CPUID(0x80000006)
Return the host's L2 cache and TLB information for CPUID.0x80000006
instead of zeroing out the entry as part of KVM_GET_SUPPORTED_CPUID.
This allows a userspace VMM to feed KVM_GET_SUPPORTED_CPUID's output
directly into KVM_SET_CPUID2 (without breaking the guest).
Signed-off-by: Eric Northup (Google) <digitaleric@gmail.com>
Signed-off-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Jon Cargille <jcargill@google.com>
Message-Id: <20200415012320.236065-1-jcargill@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | arch/x86/kvm/cpuid.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index 901cd1fdecd9..6828be99b908 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -728,6 +728,9 @@ static inline int __do_cpuid_func(struct kvm_cpuid_array *array, u32 function) cpuid_entry_override(entry, CPUID_8000_0001_EDX); cpuid_entry_override(entry, CPUID_8000_0001_ECX); break; + case 0x80000006: + /* L2 cache and TLB: pass through host info. */ + break; case 0x80000007: /* Advanced power management */ /* invariant TSC is CPUID.80000007H:EDX[8] */ entry->edx &= (1 << 8); |