[PATCH v3 0/2] x86: KVM: Add missing AMD features

Maksim Davydov
2024-12-04T13:45:51Z

This series adds definition of some missing AMD features in
0x80000008_EBX and 0x80000021_EAX functions. It also gives an opportunity
to expose these features to userspace.

Related discussion in QEMU:
https://lore.kernel.org/kvm/24462567-e486-4b7f-b869-a1fab48d739c@yandex-team.ru/

v3 -> v2:
* rebased onto the newest master
* AMD_IBPB_RET was removed because all work had been done in 71dd5d5300d2
* renamed "IBRS provides same mode protection" bit

v2 -> v1:
* fixed the bug in the FSRC definition

v2:
https://lore.kernel.org/kvm/20241126094424.943192-1-davydov-max@yandex-team.ru/

v1:
https://lore.kernel.org/kvm/20241113133042.702340-1-davydov-max@yandex-team.ru/

Maksim Davydov (2):
x86: KVM: Advertise FSRS and FSRC on AMD to userspace
x86: KVM: Advertise AMD's speculation control features

arch/x86/include/asm/cpufeatures.h | 5 +++++
arch/x86/kvm/cpuid.c | 9 +++++----
2 files changed, 10 insertions(+), 4 deletions(-)

--
2.34.1