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From: David Riley <d.riley@proxmox.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, jon@nutanix.com
Subject: Re: [PATCH v4 00/28] KVM: combined patchset for MBEC/GMET support
Date: Thu, 30 Apr 2026 14:08:25 +0200	[thread overview]
Message-ID: <1a7c35d8-d7fe-4eec-ad83-da92780b62ce@proxmox.com> (raw)
In-Reply-To: <CABgObfaFeK4kJpMGuki2hQxnz2ij8Nyyk0egxEfW4b_OYf9hgg@mail.gmail.com>

On 4/30/26 12:27 PM, Paolo Bonzini wrote:
> On Wed, Apr 29, 2026 at 3:05 PM David Riley <d.riley@proxmox.com> wrote:
>> I observed the following:
>> The guest now never actually boots into Windows. It gets stuck before
>> that and therefore does not even enter Windows Recovery.
> Last minute rebase screwup. The old code had:
>
>      vmcb02->control.misc_ctl = vmcb01->control.misc_ctl & SVM_MISC_ENABLE_NP;
>
> New code has:
>
>      vmcb02->control.misc_ctl = vmcb01->control.misc_ctl & SVM_MISC_ENABLE_NP;
>
> And now needs to pass down GMET as well.

Thanks for looking into it.
I changed the line to:

vmcb02->control.misc_ctl = vmcb01->control.misc_ctl & (SVM_MISC_ENABLE_NP | SVM_MISC_ENABLE_GMET);

and was able to start the Windows VM with VBS enabled.

> Paolo
>
>


  reply	other threads:[~2026-04-30 12:08 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-04-28 11:09 [PATCH v4 00/28] KVM: combined patchset for MBEC/GMET support Paolo Bonzini
2026-04-28 11:09 ` [PATCH 01/28] KVM: TDX/VMX: rework EPT_VIOLATION_EXEC_FOR_RING3_LIN into PROT_MASK Paolo Bonzini
2026-04-28 11:09 ` [PATCH 02/28] KVM: x86/mmu: remove SPTE_PERM_MASK Paolo Bonzini
2026-04-28 11:09 ` [PATCH 03/28] KVM: x86/mmu: free up bit 10 of PTEs in preparation for MBEC Paolo Bonzini
2026-04-28 11:09 ` [PATCH 04/28] KVM: x86/mmu: shuffle high bits of SPTEs " Paolo Bonzini
2026-04-28 11:09 ` [PATCH 05/28] KVM: x86/mmu: remove SPTE_EPT_* Paolo Bonzini
2026-04-28 11:09 ` [PATCH 06/28] KVM: x86/mmu: merge make_spte_{non,}executable Paolo Bonzini
2026-04-28 11:09 ` [PATCH 07/28] KVM: x86/mmu: rename and clarify BYTE_MASK Paolo Bonzini
2026-04-28 11:09 ` [PATCH 08/28] KVM: x86/mmu: introduce ACC_READ_MASK Paolo Bonzini
2026-04-28 11:09 ` [PATCH 09/28] KVM: x86/mmu: separate more EPT/non-EPT permission_fault() Paolo Bonzini
2026-04-28 11:09 ` [PATCH 10/28] KVM: x86/mmu: pass PFERR_GUEST_PAGE/FINAL_MASK to kvm_translate_gpa Paolo Bonzini
2026-04-28 11:09 ` [PATCH 11/28] KVM: x86/mmu: pass pte_access for final nGPA->GPA walk Paolo Bonzini
2026-04-29  7:58   ` Paolo Bonzini
2026-04-28 11:09 ` [PATCH 12/28] KVM: x86: make translate_nested_gpa vendor-specific Paolo Bonzini
2026-04-28 11:09 ` [PATCH 13/28] KVM: x86/mmu: split XS/XU bits for EPT Paolo Bonzini
2026-04-28 11:09 ` [PATCH 14/28] KVM: x86/mmu: move cr4_smep to base role Paolo Bonzini
2026-04-28 11:09 ` [PATCH 15/28] KVM: VMX: enable use of MBEC Paolo Bonzini
2026-04-28 11:09 ` [PATCH 16/28] KVM: nVMX: pass advanced EPT violation vmexit info to guest Paolo Bonzini
2026-04-28 11:09 ` [PATCH 17/28] KVM: nVMX: pass PFERR_USER_MASK to MMU on EPT violations Paolo Bonzini
2026-04-28 11:09 ` [PATCH 18/28] KVM: x86/mmu: add support for MBEC to EPT page table walks Paolo Bonzini
2026-04-28 11:09 ` [PATCH 19/28] KVM: nVMX: advertise MBEC to nested guests Paolo Bonzini
2026-04-28 11:09 ` [PATCH 20/28] KVM: nVMX: allow MBEC with EVMCS Paolo Bonzini
2026-04-28 11:09 ` [PATCH 21/28] KVM: x86/mmu: propagate access mask from root pages down Paolo Bonzini
2026-04-28 11:09 ` [PATCH 22/28] KVM: x86/mmu: introduce cpu_role bit for availability of PFEC.I/D Paolo Bonzini
2026-04-28 11:09 ` [PATCH 23/28] KVM: SVM: add GMET bit definitions Paolo Bonzini
2026-04-28 11:09 ` [PATCH 24/28] KVM: x86/mmu: set CR0.WP=1 for shadow NPT MMU Paolo Bonzini
2026-04-28 11:09 ` [PATCH 25/28] KVM: x86/mmu: add support for GMET to NPT page table walks Paolo Bonzini
2026-04-28 11:09 ` [PATCH 26/28] KVM: SVM: enable GMET and set it in MMU role Paolo Bonzini
2026-04-28 11:09 ` [PATCH 27/28] KVM: SVM: work around errata 1218 Paolo Bonzini
2026-04-28 11:09 ` [PATCH 28/28] KVM: nSVM: enable GMET for guests Paolo Bonzini
2026-04-29 13:05 ` [PATCH v4 00/28] KVM: combined patchset for MBEC/GMET support David Riley
2026-04-29 13:12   ` Paolo Bonzini
2026-04-30 10:28   ` Paolo Bonzini
2026-04-30 12:08     ` David Riley [this message]
2026-05-05  1:14       ` Jon Kohler
2026-05-05  5:31         ` Paolo Bonzini

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