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[PATCH] nestedsvm: Don't set CR2 while injecting VMEXIT_EXCEPTION_PF
- To: xen-devel@xxxxxxxxxxxxxxxxxxxx
- From: Ross Lagerwall <ross.lagerwall@xxxxxxxxxx>
- Date: Fri, 13 Nov 2026 17:24:44 +0000
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- Cc: Ross Lagerwall <ross.lagerwall@xxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Roger Pau Monné <roger@xxxxxxxxxxxxxx>, Jason Andryuk <jason.andryuk@xxxxxxx>, Teddy Astie <teddy.astie@xxxxxxxxxx>
- Delivery-date: Fri, 13 Nov 2026 18:28:14 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
According to the APM, the #PF intercept is tested before CR2 is written
so don't write CR2 while injecting VMEXIT_EXCEPTION_PF into L1.
The faulting address is available to L1 in EXITINFO2.
Fixes: 9a779e4fc161 ("Implement SVM specific part for Nested Virtualization")
Signed-off-by: Ross Lagerwall <ross.lagerwall@xxxxxxxxxx>
---
xen/arch/x86/hvm/svm/nestedsvm.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/xen/arch/x86/hvm/svm/nestedsvm.c b/xen/arch/x86/hvm/svm/nestedsvm.c
index 81cae929dd05..366178ff54a7 100644
--- a/xen/arch/x86/hvm/svm/nestedsvm.c
+++ b/xen/arch/x86/hvm/svm/nestedsvm.c
@@ -741,8 +741,6 @@ nsvm_vcpu_vmexit_inject(struct vcpu *v, struct
cpu_user_regs *regs,
ns_vmcb->exit_int_info = ns_vmcb->event_inj;
break;
case VMEXIT_EXCEPTION_PF:
- ns_vmcb->_cr2 = ns_vmcb->ei.exc.cr2;
- fallthrough;
case VMEXIT_NPF:
ns_vmcb->exitinfo2 = svm->ns_vmexit.exitinfo2;
fallthrough;
--
2.56.0
|
