[PATCH] Qemu co-operation with kvm tsc deadline timer

["Liu, Jinsong" <jinsong.liu@xxxxxxxxx>]

>From 8c39f2ddbf7069342826a83e535c0c7b641d6501 Mon Sep 17 00:00:00 2001
From: Liu, Jinsong <jinsong.liu@xxxxxxxxx>
Date: Thu, 22 Sep 2011 16:28:13 +0800
Subject: [PATCH] Qemu co-operation with kvm tsc deadline timer

KVM add emulation of lapic tsc deadline timer for guest.
This patch is co-operation work at qemu side.

Signed-off-by: Liu, Jinsong <jinsong.liu@xxxxxxxxx>
---
 target-i386/cpu.h     |    2 ++
 target-i386/kvm.c     |    7 +++++++
 target-i386/machine.c |    1 +
 3 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/target-i386/cpu.h b/target-i386/cpu.h
index 935d08a..62ff73c 100644
--- a/target-i386/cpu.h
+++ b/target-i386/cpu.h
@@ -283,6 +283,7 @@
 #define MSR_IA32_APICBASE_BSP           (1<<8)
 #define MSR_IA32_APICBASE_ENABLE        (1<<11)
 #define MSR_IA32_APICBASE_BASE          (0xfffff<<12)
+#define MSR_IA32_TSCDEADLINE            0x6e0
 
 #define MSR_MTRRcap			0xfe
 #define MSR_MTRRcap_VCNT		8
@@ -687,6 +688,7 @@ typedef struct CPUX86State {
     uint64_t async_pf_en_msr;
 
     uint64_t tsc;
+    uint64_t tsc_deadline;
 
     uint64_t mcg_status;
 
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index aa843f0..2d55070 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -942,6 +942,8 @@ static int kvm_put_msrs(CPUState *env, int level)
         }
     }
 
+    kvm_msr_entry_set(&msrs[n++], MSR_IA32_TSCDEADLINE, env->tsc_deadline);
+
     msr_data.info.nmsrs = n;
 
     return kvm_vcpu_ioctl(env, KVM_SET_MSRS, &msr_data);
@@ -1173,6 +1175,8 @@ static int kvm_get_msrs(CPUState *env)
         }
     }
 
+    msrs[n++].index = MSR_IA32_TSCDEADLINE;
+
     msr_data.info.nmsrs = n;
     ret = kvm_vcpu_ioctl(env, KVM_GET_MSRS, &msr_data);
     if (ret < 0) {
@@ -1213,6 +1217,9 @@ static int kvm_get_msrs(CPUState *env)
         case MSR_IA32_TSC:
             env->tsc = msrs[i].data;
             break;
+        case MSR_IA32_TSCDEADLINE:
+            env->tsc_deadline = msrs[i].data;
+            break;
         case MSR_VM_HSAVE_PA:
             env->vm_hsave = msrs[i].data;
             break;
diff --git a/target-i386/machine.c b/target-i386/machine.c
index 9aca8e0..25fa97d 100644
--- a/target-i386/machine.c
+++ b/target-i386/machine.c
@@ -410,6 +410,7 @@ static const VMStateDescription vmstate_cpu = {
         VMSTATE_UINT64_V(xcr0, CPUState, 12),
         VMSTATE_UINT64_V(xstate_bv, CPUState, 12),
         VMSTATE_YMMH_REGS_VARS(ymmh_regs, CPUState, CPU_NB_REGS, 12),
+        VMSTATE_UINT64_V(tsc_deadline, CPUState, 13),
         VMSTATE_END_OF_LIST()
         /* The above list is not sorted /wrt version numbers, watch out! */
     },
-- 
1.6.5.6

Attachment: qemu-tsc-deadline-timer.patch
Description: qemu-tsc-deadline-timer.patch