github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-04 12:35:52 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

KVM: x86/mmu: Skip MMIO SPTE invalidation if enable_mmio_caching=0

Browse Source 
If MMIO caching is disabled, there are no MMIO SPTEs to invalidate, so
the costly zapping of all pages is unnecessary even in the unlikely case
when the MMIO generation number has wrapped.

Signed-off-by: Dmytro Maluka <dmaluka@chromium.org>
Link: https://lore.kernel.org/r/20250926135139.1597781-1-dmaluka@chromium.org
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Dmytro Maluka 2025-09-26 15:51:39 +02:00 committed by Sean Christopherson
parent 3a86608788
commit b850841a53
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/x86/kvm/mmu/mmu.c
View File

@ -7364,6 +7364,9 @@ void kvm_mmu_invalidate_mmio_sptes(struct kvm *kvm, u64 gen)
{
WARN_ON_ONCE(gen & KVM_MEMSLOT_GEN_UPDATE_IN_PROGRESS);
if (!enable_mmio_caching)
return;
gen &= MMIO_SPTE_GEN_MASK;
/*