linux-kernel - [PATCH 055/104] KVM: Communicate cr8 changes to userspace

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Message-Id: <11900179482472-git-send-email-avi@qumranet.com>
Date:	Mon, 17 Sep 2007 10:31:37 +0200
From:	Avi Kivity <avi@...ranet.com>
To:	kvm-devel@...ts.sourceforge.net
Cc:	linux-kernel@...r.kernel.org, "Yang, Sheng" <sheng.yang@...el.com>
Subject: [PATCH 055/104] KVM: Communicate cr8 changes to userspace

From: Yang, Sheng <sheng.yang@...el.com>

This allows running 64-bit Windows.

Signed-off-by: Sheng Yang <sheng.yang@...el.com>
Signed-off-by: Avi Kivity <avi@...ranet.com>
---
 drivers/kvm/vmx.c   |    3 ++-
 include/linux/kvm.h |    1 +
 2 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c
index a9b4cb5..cd999c0 100644
--- a/drivers/kvm/vmx.c
+++ b/drivers/kvm/vmx.c
@@ -1831,7 +1831,8 @@ static int handle_cr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 			vcpu_load_rsp_rip(vcpu);
 			set_cr8(vcpu, vcpu->regs[reg]);
 			skip_emulated_instruction(vcpu);
-			return 1;
+			kvm_run->exit_reason = KVM_EXIT_SET_TPR;
+			return 0;
 		};
 		break;
 	case 2: /* clts */
diff --git a/include/linux/kvm.h b/include/linux/kvm.h
index 91a446f..1d5a49c 100644
--- a/include/linux/kvm.h
+++ b/include/linux/kvm.h
@@ -46,6 +46,7 @@ enum kvm_exit_reason {
 	KVM_EXIT_SHUTDOWN         = 8,
 	KVM_EXIT_FAIL_ENTRY       = 9,
 	KVM_EXIT_INTR             = 10,
+	KVM_EXIT_SET_TPR          = 11
 };
 
 /* for KVM_RUN, returned by mmap(vcpu_fd, offset=0) */
-- 
1.5.3

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