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[PATCH v4 0/4] x86: Drop cross-vendor support

From: Alejandro Vallejo <alejandro.garciavallejo@xxxxxxx>

Date: Wed, 11 Mar 2026 15:27:03 +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: Wed, 11 Mar 2026 14:27:40 +0000

List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

Hi, Only patches 1 and 2 missing acks. 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/ v3: https://lore.kernel.org/xen-devel/20260213114232.42996-1-alejandro.garciavallejo@xxxxxxx/ pipeline (green): https://gitlab.com/xen-project/people/agvallejo/xen/-/pipelines/2378378894 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 | 73 +++++++++--------------- 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/lib/cpu-policy/policy.c | 5 +- xen/arch/x86/msr.c | 8 +-- 9 files changed, 91 insertions(+), 88 deletions(-) base-commit: bfb33fa6d4eb4110cd7dd47ec71d2e550739e126 -- 2.43.0

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