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KVM x86 MMU changes for 6.19:

Browse source 
- Skip the costly "zap all SPTEs" on an MMIO generation wrap if MMIO SPTE
    caching is disabled, as there can't be any relevant SPTEs to zap.
 
  - Relocate a misplace export.
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Merge tag 'kvm-x86-mmu-6.19' of https://github.com/kvm-x86/linux into HEAD

KVM x86 MMU changes for 6.19:

 - Skip the costly "zap all SPTEs" on an MMIO generation wrap if MMIO SPTE
   caching is disabled, as there can't be any relevant SPTEs to zap.

 - Relocate a misplace export.
This commit is contained in:
Paolo Bonzini 2025-11-26 09:36:01 +01:00
commit adc99a6cfc
1 changed files with 4 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

5
arch/x86/kvm/mmu/mmu.c
View file

@ -6863,6 +6863,7 @@ void kvm_zap_gfn_range(struct kvm *kvm, gfn_t gfn_start, gfn_t gfn_end)
write_unlock(&kvm->mmu_lock);
}
EXPORT_SYMBOL_FOR_KVM_INTERNAL(kvm_zap_gfn_range);
static bool slot_rmap_write_protect(struct kvm *kvm,
struct kvm_rmap_head *rmap_head,
@ -7204,7 +7205,6 @@ restart:
return need_tlb_flush;
}
EXPORT_SYMBOL_FOR_KVM_INTERNAL(kvm_zap_gfn_range);
static void kvm_rmap_zap_collapsible_sptes(struct kvm *kvm,
const struct kvm_memory_slot *slot)
@ -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;
/*