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[PATCH v3 0/4] x86: Drop cross-vendor support
- To: <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Alejandro Vallejo <alejandro.garciavallejo@xxxxxxx>
- Date: Fri, 13 Feb 2026 12:42:26 +0100
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- Cc: Alejandro Vallejo <alejandro.garciavallejo@xxxxxxx>, Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>, Community Manager <community.manager@xxxxxxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, "Andrew Cooper" <andrew.cooper3@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, "Jason Andryuk" <jason.andryuk@xxxxxxx>
- Delivery-date: Fri, 13 Feb 2026 11:43:01 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
Hi,
v1:
https://lore.kernel.org/xen-devel/20260122164943.20691-1-alejandro.garciavallejo@xxxxxxx/
v2:
https://lore.kernel.org/xen-devel/20260205170923.38425-1-alejandro.garciavallejo@xxxxxxx/
pipeline (green):
https://gitlab.com/xen-project/people/agvallejo/xen/-/pipelines/2324131649
This time the policy check uses e{b,c,d}x rather than x86_vendor and there's
2 unit tests for it.
Cheers,
Alejandro
Alejandro Vallejo (4):
x86: Reject CPU policies with vendors other than the host's
x86/hvm: Disable cross-vendor handling in #UD handler
x86/hvm: Remove cross-vendor checks from MSR handlers.
x86/svm: Drop emulation of Intel's SYSENTER behaviour on AMD systems
CHANGELOG.md | 5 ++
tools/tests/cpu-policy/test-cpu-policy.c | 27 +++++++++
xen/arch/x86/hvm/hvm.c | 77 +++++++++---------------
xen/arch/x86/hvm/svm/svm.c | 45 ++++++--------
xen/arch/x86/hvm/svm/vmcb.c | 3 +
xen/arch/x86/hvm/vmx/vmx.c | 3 +-
xen/arch/x86/include/asm/hvm/svm-types.h | 10 ---
xen/arch/x86/msr.c | 8 +--
xen/lib/x86/policy.c | 5 +-
9 files changed, 93 insertions(+), 90 deletions(-)
base-commit: 1f4f85b64d393be1aa8dc8170201f4fbfe9c7222
--
2.43.0
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