KVM: x86/mmu: propagate access mask from root pages down

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Until now, all SPTEs have had all kinds of access allowed; however,
for GMET to be enabled all the pages have to have ACC_USER_MASK
disabled.  By marking them as supervisor pages, the processor
allows execution from either user or supervisor mode (unlike
for normal paging, NPT ignores the U bit for reads and writes).
That will mean that the root page's role has ACC_USER_MASK
cleared and that has to be propagated down through the kvm_mmu_page
tree.

Do that, and pass the required access to the
kvm_mmu_spte_requested tracepoint since it's not ACC_ALL
anymore.

Tested-by: David Riley <d.riley@proxmox.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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This commit is contained in:

Paolo Bonzini 2026-04-08 11:42:11 -04:00

parent 55a71224bd

commit 4ae0a67231

4 changed files with 15 additions and 12 deletions

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9

arch/x86/kvm/mmu/mmu.c

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10

arch/x86/kvm/mmu/mmutrace.h

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2

arch/x86/kvm/mmu/paging_tmpl.h

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6

arch/x86/kvm/mmu/tdp_mmu.c

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