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Subject[PATCH 2/13] KVM/MMU: Add tlb flush with range helper function
Date
This patch is to add wrapper functions for tlb_remote_flush_with_range
callback.

Signed-off-by: Lan Tianyu <Tianyu.Lan@microsoft.com>
---
arch/x86/kvm/mmu.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 48 insertions(+)

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 456d4d0f7eb7..8cf47befc0f2 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -253,6 +253,54 @@ static void mmu_spte_set(u64 *sptep, u64 spte);
static union kvm_mmu_page_role
kvm_mmu_calc_root_page_role(struct kvm_vcpu *vcpu);

+
+static inline bool kvm_available_flush_tlb_with_range(void)
+{
+ return kvm_x86_ops->tlb_remote_flush_with_range;
+}
+
+static void kvm_flush_remote_tlbs_with_range(struct kvm *kvm,
+ struct kvm_tlb_range *range)
+{
+ int ret = -ENOTSUPP;
+
+ if (range && kvm_x86_ops->tlb_remote_flush_with_range) {
+ /*
+ * Read tlbs_dirty before setting KVM_REQ_TLB_FLUSH in
+ * kvm_make_all_cpus_request.
+ */
+ long dirty_count = smp_load_acquire(&kvm->tlbs_dirty);
+
+ ret = kvm_x86_ops->tlb_remote_flush_with_range(kvm, range);
+ cmpxchg(&kvm->tlbs_dirty, dirty_count, 0);
+ }
+
+ if (ret)
+ kvm_flush_remote_tlbs(kvm);
+}
+
+static void kvm_flush_remote_tlbs_with_list(struct kvm *kvm,
+ struct list_head *flush_list)
+{
+ struct kvm_tlb_range range;
+
+ range.flush_list = flush_list;
+
+ kvm_flush_remote_tlbs_with_range(kvm, &range);
+}
+
+static void kvm_flush_remote_tlbs_with_address(struct kvm *kvm,
+ u64 start_gfn, u64 end_gfn)
+{
+ struct kvm_tlb_range range;
+
+ range.start_gfn = start_gfn;
+ range.end_gfn = end_gfn;
+ range.flush_list = NULL;
+
+ kvm_flush_remote_tlbs_with_range(kvm, &range);
+}
+
void kvm_mmu_set_mmio_spte_mask(u64 mmio_mask, u64 mmio_value)
{
BUG_ON((mmio_mask & mmio_value) != mmio_value);
--
2.14.4
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