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[PATCH v3 0/3] x86/hvm: fix EFLAGS.IF handling of pending events with nested virt
- To: ross.lagerwall@xxxxxxxxxx
- From: chunjie.zhu@xxxxxxxxxx
- Date: Thu, 12 Nov 2026 19:35:22 +0800
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- Cc: andrew.cooper3@xxxxxxxxxx, chunjie.zhu@xxxxxxxxxx, jason.andryuk@xxxxxxx, jbeulich@xxxxxxxx, roger@xxxxxxxxxxxxxx, teddy.astie@xxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Thu, 12 Nov 2026 11:35:59 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
From: Chunjie Zhu <chunjie.zhu@xxxxxxxxxx>
Patches 1 and 3 stop EFLAGS.IF from holding off NMI/#MC when nested state
is involved (and in hvm_interrupt_blocked() for #MC). Patch 2 makes
nested SVM honour L2's EFLAGS.IF when L1 clears V_INTR_MASKING.
v3:
* Address Ross's review comments on v2, see individual patches.
* New patch 3/3, suggested by Ross.
* Rebased on staging.
Chunjie Zhu (3):
x86/hvm: don't let EFLAGS.IF block NMI/#MC due to nested state
x86/nestedsvm: honour L2's EFLAGS.IF when L1 clears V_INTR_MASKING
x86/hvm: don't let EFLAGS.IF block #MC in hvm_interrupt_blocked
xen/arch/x86/hvm/hvm.c | 4 +++-
xen/arch/x86/hvm/svm/nestedsvm.c | 14 ++++++++++++--
xen/arch/x86/hvm/vmx/intr.c | 8 ++++----
xen/arch/x86/include/asm/hvm/hvm.h | 12 ++++++++++--
4 files changed, 29 insertions(+), 9 deletions(-)
--
2.34.1
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