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| author |   Takahiro Itazuri <itazur@amazon.com> | 2023-07-12 19:31:36 +0100 |
|---|---|---|
| committer |   Sean Christopherson <seanjc@google.com> | 2023-08-02 15:49:23 -0700 |
| commit | af8e2ccfa6f101f505add076c1a4d56c718e0d50 (patch) | |
| tree | fc3c08f5eb95a15f41d1a34e21e1e3b2a26a702c /arch/x86/kvm/lapic.c | |
| parent | KVM: x86: Remove x86_emulate_ops::guest_has_long_mode (diff) | |
| download | wireguard-linux-af8e2ccfa6f101f505add076c1a4d56c718e0d50.tar.xz wireguard-linux-af8e2ccfa6f101f505add076c1a4d56c718e0d50.zip | |
KVM: x86: Advertise host CPUID 0x80000005 in KVM_GET_SUPPORTED_CPUID
Advertise CPUID 0x80000005 (L1 cache and TLB info) to userspace so that
VMMs that reflect KVM_GET_SUPPORTED_CPUID into KVM_SET_CPUID2 will
enumerate sane cache/TLB information to the guest.
CPUID 0x80000006 (L2 cache and TLB and L3 cache info) has been returned
since commit 43d05de2bee7 ("KVM: pass through CPUID(0x80000006)").
Enumerating both 0x80000005 and 0x80000006 with KVM_GET_SUPPORTED_CPUID
is better than reporting one or the other, and 0x80000005 could be helpful
for VMM to pass it to KVM_SET_CPUID{,2} for the same reason with
0x80000006.
Signed-off-by: Takahiro Itazuri <itazur@amazon.com>
Link: https://lore.kernel.org/all/ZK7NmfKI9xur%2FMop@google.com
Link: https://lore.kernel.org/r/20230712183136.85561-1-itazur@amazon.com
[sean: add link, massage changelog]
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'arch/x86/kvm/lapic.c')
0 files changed, 0 insertions, 0 deletions