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Subject[Resend PATCH V5 1/10] KVM: Add tlb_remote_flush_with_range callback in kvm_x86_ops
Date
From: Lan Tianyu <Tianyu.Lan@microsoft.com>

Add flush range call back in the kvm_x86_ops and platform can use it
to register its associated function. The parameter "kvm_tlb_range"
accepts a single range and flush list which contains a list of ranges.

Signed-off-by: Lan Tianyu <Tianyu.Lan@microsoft.com>
---
Change since v1:
Change "end_gfn" to "pages" to aviod confusion as to whether
"end_gfn" is inclusive or exlusive.
---
arch/x86/include/asm/kvm_host.h | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index fbda5a917c5b..fc7513ecfc13 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -439,6 +439,11 @@ struct kvm_mmu {
u64 pdptrs[4]; /* pae */
};

+struct kvm_tlb_range {
+ u64 start_gfn;
+ u64 pages;
+};
+
enum pmc_type {
KVM_PMC_GP = 0,
KVM_PMC_FIXED,
@@ -1042,6 +1047,8 @@ struct kvm_x86_ops {

void (*tlb_flush)(struct kvm_vcpu *vcpu, bool invalidate_gpa);
int (*tlb_remote_flush)(struct kvm *kvm);
+ int (*tlb_remote_flush_with_range)(struct kvm *kvm,
+ struct kvm_tlb_range *range);

/*
* Flush any TLB entries associated with the given GVA.
--
2.14.4
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