Merge tag 'kvmarm-fixes-6.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm64 fixes for 6.12, take #1

- Fix pKVM error path on init, making sure we do not change critical
  system registers as we're about to fail

- Make sure that the host's vector length is at capped by a value
  common to all CPUs

- Fix kvm_has_feat*() handling of "negative" features, as the current
  code is pretty broken

- Promote Joey to the status of official reviewer, while James steps
  down -- hopefully only temporarly

1 files changed, 3 insertions, 5 deletions

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 912bad4fa88c..a9a23e058555 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -4703,16 +4703,14 @@ out_unlock:
 bool kvm_mmu_may_ignore_guest_pat(void)
 {
 	/*
-	 * When EPT is enabled (shadow_memtype_mask is non-zero), the CPU does
-	 * not support self-snoop (or is affected by an erratum), and the VM
+	 * When EPT is enabled (shadow_memtype_mask is non-zero), and the VM
 	 * has non-coherent DMA (DMA doesn't snoop CPU caches), KVM's ABI is to
 	 * honor the memtype from the guest's PAT so that guest accesses to
 	 * memory that is DMA'd aren't cached against the guest's wishes.  As a
 	 * result, KVM _may_ ignore guest PAT, whereas without non-coherent DMA,
-	 * KVM _always_ ignores or honors guest PAT, i.e. doesn't toggle SPTE
-	 * bits in response to non-coherent device (un)registration.
+	 * KVM _always_ ignores guest PAT (when EPT is enabled).
 	 */
-	return !static_cpu_has(X86_FEATURE_SELFSNOOP) && shadow_memtype_mask;
+	return shadow_memtype_mask;
 }
 
 int kvm_tdp_page_fault(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault)