[PATCH v3 2/2] target-i386: MSR_IA32_BNDCFGS handle

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

>From 12fa3564b7342c4e034b13671dc922ff23ac4b1e Mon Sep 17 00:00:00 2001
From: Liu Jinsong <jinsong.liu@xxxxxxxxx>
Date: Sat, 7 Dec 2013 05:18:35 +0800
Subject: [PATCH v3 2/2] target-i386: MSR_IA32_BNDCFGS handle

Signed-off-by: Liu Jinsong <jinsong.liu@xxxxxxxxx>
---
 target-i386/cpu.h     |    3 +++
 target-i386/kvm.c     |   14 ++++++++++++++
 target-i386/machine.c |    7 ++++++-
 3 files changed, 23 insertions(+), 1 deletions(-)

diff --git a/target-i386/cpu.h b/target-i386/cpu.h
index c28b901..bbec228 100644
--- a/target-i386/cpu.h
+++ b/target-i386/cpu.h
@@ -380,6 +380,8 @@
 
 #define MSR_VM_HSAVE_PA                 0xc0010117
 
+#define MSR_IA32_BNDCFGS                0x00000d90
+
 #define XSTATE_FP                       (1ULL << 0)
 #define XSTATE_SSE                      (1ULL << 1)
 #define XSTATE_YMM                      (1ULL << 2)
@@ -928,6 +930,7 @@ typedef struct CPUX86State {
     XMMReg ymmh_regs[CPU_NB_REGS];
     BNDReg bnd_regs[4];
     BNDCSReg bndcs_regs;
+    uint64_t msr_bndcfgs;
 
     uint64_t xcr0;
 
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index ff913ff..01ebca2 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -69,6 +69,7 @@ static bool has_msr_feature_control;
 static bool has_msr_async_pf_en;
 static bool has_msr_pv_eoi_en;
 static bool has_msr_misc_enable;
+static bool has_msr_bndcfgs;
 static bool has_msr_kvm_steal_time;
 static int lm_capable_kernel;
 
@@ -772,6 +773,10 @@ static int kvm_get_supported_msrs(KVMState *s)
                     has_msr_misc_enable = true;
                     continue;
                 }
+                if (kvm_msr_list->indices[i] == MSR_IA32_BNDCFGS) {
+                    has_msr_bndcfgs = true;
+                    continue;
+                }
             }
         }
 
@@ -1214,6 +1219,9 @@ static int kvm_put_msrs(X86CPU *cpu, int level)
             kvm_msr_entry_set(&msrs[n++], MSR_IA32_FEATURE_CONTROL,
                               env->msr_ia32_feature_control);
         }
+        if (has_msr_bndcfgs) {
+            kvm_msr_entry_set(&msrs[n++], MSR_IA32_BNDCFGS, env->msr_bndcfgs);
+        }
     }
     if (env->mcg_cap) {
         int i;
@@ -1445,6 +1453,9 @@ static int kvm_get_msrs(X86CPU *cpu)
     if (has_msr_feature_control) {
         msrs[n++].index = MSR_IA32_FEATURE_CONTROL;
     }
+    if (has_msr_bndcfgs) {
+        msrs[n++].index = MSR_IA32_BNDCFGS;
+    }
 
     if (!env->tsc_valid) {
         msrs[n++].index = MSR_IA32_TSC;
@@ -1560,6 +1571,9 @@ static int kvm_get_msrs(X86CPU *cpu)
         case MSR_IA32_FEATURE_CONTROL:
             env->msr_ia32_feature_control = msrs[i].data;
             break;
+        case MSR_IA32_BNDCFGS:
+            env->msr_bndcfgs = msrs[i].data;
+            break;
         default:
             if (msrs[i].index >= MSR_MC0_CTL &&
                 msrs[i].index < MSR_MC0_CTL + (env->mcg_cap & 0xff) * 4) {
diff --git a/target-i386/machine.c b/target-i386/machine.c
index ceab51b..2de1964 100644
--- a/target-i386/machine.c
+++ b/target-i386/machine.c
@@ -533,7 +533,11 @@ static bool mpx_needed(void *opaque)
         }
     }
 
-    return env->bndcs_regs.cfgu || env->bndcs_regs.sts;
+    if (env->bndcs_regs.cfgu || env->bndcs_regs.sts) {
+        return true;
+    }
+
+    return !!env->msr_bndcfgs;
 }
 
 static const VMStateDescription vmstate_mpx = {
@@ -545,6 +549,7 @@ static const VMStateDescription vmstate_mpx = {
         VMSTATE_BND_REGS(env.bnd_regs, X86CPU, 4),
         VMSTATE_UINT64(env.bndcs_regs.cfgu, X86CPU),
         VMSTATE_UINT64(env.bndcs_regs.sts, X86CPU),
+        VMSTATE_UINT64(env.msr_bndcfgs, X86CPU),
         VMSTATE_END_OF_LIST()
     }
 };
-- 
1.7.1

Attachment: 0002-target-i386-MSR_IA32_BNDCFGS-handle.patch
Description: 0002-target-i386-MSR_IA32_BNDCFGS-handle.patch