[PATCH 3/4] Nested SVM: Implement INVLPGA

From: Alexander Graf <agraf@suse.de>
To: kvm@vger.kernel.org
Subject: [PATCH 3/4] Nested SVM: Implement INVLPGA
Date: Mon, 15 Jun 2009 15:21:24 +0200	[thread overview]
Message-ID: <1245072085-8504-4-git-send-email-agraf@suse.de> (raw)
In-Reply-To: <1245072085-8504-3-git-send-email-agraf@suse.de>

SVM adds another way to do INVLPG by ASID which Hyper-V makes use of,
so let's implement it!

For now we just do the same thing invlpg does, as asid switching
means we flush the mmu anyways. That might change one day though.

v2 makes invlpga do the same as invlpg, not flush the whole mmu

Signed-off-by: Alexander Graf <agraf@suse.de>
---
 arch/x86/kvm/svm.c |   15 ++++++++++++++-
 1 files changed, 14 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 4b4eadd..fa2a710 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1785,6 +1785,19 @@ static int clgi_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
 	return 1;
 }
 
+static int invlpga_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
+{
+	struct kvm_vcpu *vcpu = &svm->vcpu;
+	nsvm_printk("INVLPGA\n");
+
+	/* Let's treat INVLPGA the same as INVLPG (can be optimized!) */
+	kvm_mmu_invlpg(vcpu, vcpu->arch.regs[VCPU_REGS_RAX]);
+
+	svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
+	skip_emulated_instruction(&svm->vcpu);
+	return 1;
+}
+
 static int invalid_op_interception(struct vcpu_svm *svm,
 				   struct kvm_run *kvm_run)
 {
@@ -2130,7 +2143,7 @@ static int (*svm_exit_handlers[])(struct vcpu_svm *svm,
 	[SVM_EXIT_INVD]                         = emulate_on_interception,
 	[SVM_EXIT_HLT]				= halt_interception,
 	[SVM_EXIT_INVLPG]			= invlpg_interception,
-	[SVM_EXIT_INVLPGA]			= invalid_op_interception,
+	[SVM_EXIT_INVLPGA]			= invlpga_interception,
 	[SVM_EXIT_IOIO] 		  	= io_interception,
 	[SVM_EXIT_MSR]				= msr_interception,
 	[SVM_EXIT_TASK_SWITCH]			= task_switch_interception,
-- 
1.6.0.2

