Messages in this thread Patch in this message | | | Date | Mon, 11 Apr 2022 14:10:11 -0700 | Subject | [PATCH v4 06/10] KVM: x86/MMU: Factor out updating NX hugepages state for a VM | From | Ben Gardon <> |
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Factor out the code to update the NX hugepages state for an individual VM. This will be expanded in future commits to allow per-VM control of Nx hugepages.
No functional change intended.
Reviewed-by: David Matlack <dmatlack@google.com> Signed-off-by: Ben Gardon <bgardon@google.com> --- arch/x86/kvm/mmu/mmu.c | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-)
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 69a30d6d1e2b..caaa610b7878 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -6144,6 +6144,15 @@ static void __set_nx_huge_pages(bool val) nx_huge_pages = itlb_multihit_kvm_mitigation = val; } +static void kvm_update_nx_huge_pages(struct kvm *kvm) +{ + mutex_lock(&kvm->slots_lock); + kvm_mmu_zap_all_fast(kvm); + mutex_unlock(&kvm->slots_lock); + + wake_up_process(kvm->arch.nx_lpage_recovery_thread); +} + static int set_nx_huge_pages(const char *val, const struct kernel_param *kp) { bool old_val = nx_huge_pages; @@ -6166,13 +6175,9 @@ static int set_nx_huge_pages(const char *val, const struct kernel_param *kp) mutex_lock(&kvm_lock); - list_for_each_entry(kvm, &vm_list, vm_list) { - mutex_lock(&kvm->slots_lock); - kvm_mmu_zap_all_fast(kvm); - mutex_unlock(&kvm->slots_lock); + list_for_each_entry(kvm, &vm_list, vm_list) + kvm_update_nx_huge_pages(kvm); - wake_up_process(kvm->arch.nx_lpage_recovery_thread); - } mutex_unlock(&kvm_lock); } -- 2.35.1.1178.g4f1659d476-goog
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