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From:   Tianyu Lan <Tianyu.Lan@microsoft.com>
CC:     Tianyu Lan <Tianyu.Lan@microsoft.com>,
        KY Srinivasan <kys@microsoft.com>,
        Haiyang Zhang <haiyangz@microsoft.com>,
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        "tglx@linutronix.de" <tglx@linutronix.de>,
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        "devel@linuxdriverproject.org" <devel@linuxdriverproject.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "kvm@vger.kernel.org" <kvm@vger.kernel.org>,
        "Michael Kelley (EOSG)" <Michael.H.Kelley@microsoft.com>,
        vkuznets <vkuznets@redhat.com>,
        Jork Loeser <Jork.Loeser@microsoft.com>
Subject: [PATCH V2 1/13] KVM: Add tlb_remote_flush_with_range callback in
 kvm_x86_ops
Thread-Topic: [PATCH V2 1/13] KVM: Add tlb_remote_flush_with_range callback in
 kvm_x86_ops
Thread-Index: AQHUTv4+wwpoTLXkbEm4tBNI57mR/A==
Date:   Tue, 18 Sep 2018 03:18:17 +0000
Message-ID: <20180918031754.113013-2-Tianyu.Lan@microsoft.com>
References: <20180918031754.113013-1-Tianyu.Lan@microsoft.com>
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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 | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_hos=
t.h
index 8e90488c3d56..a6b77978502e 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -402,6 +402,12 @@ struct kvm_mmu {
 	u64 pdptrs[4]; /* pae */
 };
=20
+struct kvm_tlb_range {
+	u64 start_gfn;
+	u64 pages;
+	struct list_head *flush_list;
+};
+
 enum pmc_type {
 	KVM_PMC_GP =3D 0,
 	KVM_PMC_FIXED,
@@ -991,6 +997,8 @@ struct kvm_x86_ops {
=20
 	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);
=20
 	/*
 	 * Flush any TLB entries associated with the given GVA.
--=20
2.14.4