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authorDavid Matlack <dmatlack@google.com>2023-08-11 07:51:18 +0300
committerMarc Zyngier <maz@kernel.org>2023-08-17 11:40:35 +0300
commitd4788996051e3c07fadc6d9b214073fcf78810a8 (patch)
tree34cfea459cc2c2d89b5b3c5e35f4d438668898b9 /virt
parenteddd21481011008792f4e647a5244f6e15970abc (diff)
downloadlinux-d4788996051e3c07fadc6d9b214073fcf78810a8.tar.xz
KVM: Allow range-based TLB invalidation from common code
Make kvm_flush_remote_tlbs_range() visible in common code and create a default implementation that just invalidates the whole TLB. This paves the way for several future features/cleanups: - Introduction of range-based TLBI on ARM. - Eliminating kvm_arch_flush_remote_tlbs_memslot() - Moving the KVM/x86 TDP MMU to common code. No functional change intended. Signed-off-by: David Matlack <dmatlack@google.com> Signed-off-by: Raghavendra Rao Ananta <rananta@google.com> Reviewed-by: Gavin Shan <gshan@redhat.com> Reviewed-by: Shaoqin Huang <shahuang@redhat.com> Reviewed-by: Anup Patel <anup@brainfault.org> Acked-by: Sean Christopherson <seanjc@google.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20230811045127.3308641-6-rananta@google.com
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/kvm_main.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index d6b050786155..26e91000f579 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -366,6 +366,19 @@ void kvm_flush_remote_tlbs(struct kvm *kvm)
}
EXPORT_SYMBOL_GPL(kvm_flush_remote_tlbs);
+void kvm_flush_remote_tlbs_range(struct kvm *kvm, gfn_t gfn, u64 nr_pages)
+{
+ if (!kvm_arch_flush_remote_tlbs_range(kvm, gfn, nr_pages))
+ return;
+
+ /*
+ * Fall back to a flushing entire TLBs if the architecture range-based
+ * TLB invalidation is unsupported or can't be performed for whatever
+ * reason.
+ */
+ kvm_flush_remote_tlbs(kvm);
+}
+
static void kvm_flush_shadow_all(struct kvm *kvm)
{
kvm_arch_flush_shadow_all(kvm);