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-rw-r--r--target-i386/cpu.c4
-rw-r--r--target-i386/cpu.h25
-rw-r--r--target-i386/kvm.c24
-rw-r--r--target-i386/machine.c51
4 files changed, 101 insertions, 3 deletions
diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index bb98f6defc..5076a94aa2 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -336,6 +336,10 @@ typedef struct ExtSaveArea {
static const ExtSaveArea ext_save_areas[] = {
[2] = { .feature = FEAT_1_ECX, .bits = CPUID_EXT_AVX,
.offset = 0x240, .size = 0x100 },
+ [3] = { .feature = FEAT_7_0_EBX, .bits = CPUID_7_0_EBX_MPX,
+ .offset = 0x3c0, .size = 0x40 },
+ [4] = { .feature = FEAT_7_0_EBX, .bits = CPUID_7_0_EBX_MPX,
+ .offset = 0x400, .size = 0x10 },
};
const char *get_register_name_32(unsigned int reg)
diff --git a/target-i386/cpu.h b/target-i386/cpu.h
index ea373e82dc..bbec228679 100644
--- a/target-i386/cpu.h
+++ b/target-i386/cpu.h
@@ -380,9 +380,14 @@
#define MSR_VM_HSAVE_PA 0xc0010117
-#define XSTATE_FP 1
-#define XSTATE_SSE 2
-#define XSTATE_YMM 4
+#define MSR_IA32_BNDCFGS 0x00000d90
+
+#define XSTATE_FP (1ULL << 0)
+#define XSTATE_SSE (1ULL << 1)
+#define XSTATE_YMM (1ULL << 2)
+#define XSTATE_BNDREGS (1ULL << 3)
+#define XSTATE_BNDCSR (1ULL << 4)
+
/* CPUID feature words */
typedef enum FeatureWord {
@@ -545,6 +550,7 @@ typedef uint32_t FeatureWordArray[FEATURE_WORDS];
#define CPUID_7_0_EBX_ERMS (1 << 9)
#define CPUID_7_0_EBX_INVPCID (1 << 10)
#define CPUID_7_0_EBX_RTM (1 << 11)
+#define CPUID_7_0_EBX_MPX (1 << 14)
#define CPUID_7_0_EBX_RDSEED (1 << 18)
#define CPUID_7_0_EBX_ADX (1 << 19)
#define CPUID_7_0_EBX_SMAP (1 << 20)
@@ -695,6 +701,16 @@ typedef union {
uint64_t q;
} MMXReg;
+typedef struct BNDReg {
+ uint64_t lb;
+ uint64_t ub;
+} BNDReg;
+
+typedef struct BNDCSReg {
+ uint64_t cfgu;
+ uint64_t sts;
+} BNDCSReg;
+
#ifdef HOST_WORDS_BIGENDIAN
#define XMM_B(n) _b[15 - (n)]
#define XMM_W(n) _w[7 - (n)]
@@ -912,6 +928,9 @@ typedef struct CPUX86State {
uint64_t xstate_bv;
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 1188482359..01ebca24f0 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;
+ }
}
}
@@ -975,6 +980,8 @@ static int kvm_put_fpu(X86CPU *cpu)
#define XSAVE_XMM_SPACE 40
#define XSAVE_XSTATE_BV 128
#define XSAVE_YMMH_SPACE 144
+#define XSAVE_BNDREGS 240
+#define XSAVE_BNDCSR 256
static int kvm_put_xsave(X86CPU *cpu)
{
@@ -1007,6 +1014,10 @@ static int kvm_put_xsave(X86CPU *cpu)
*(uint64_t *)&xsave->region[XSAVE_XSTATE_BV] = env->xstate_bv;
memcpy(&xsave->region[XSAVE_YMMH_SPACE], env->ymmh_regs,
sizeof env->ymmh_regs);
+ memcpy(&xsave->region[XSAVE_BNDREGS], env->bnd_regs,
+ sizeof env->bnd_regs);
+ memcpy(&xsave->region[XSAVE_BNDCSR], &env->bndcs_regs,
+ sizeof(env->bndcs_regs));
r = kvm_vcpu_ioctl(CPU(cpu), KVM_SET_XSAVE, xsave);
return r;
}
@@ -1208,6 +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;
@@ -1289,6 +1303,10 @@ static int kvm_get_xsave(X86CPU *cpu)
env->xstate_bv = *(uint64_t *)&xsave->region[XSAVE_XSTATE_BV];
memcpy(env->ymmh_regs, &xsave->region[XSAVE_YMMH_SPACE],
sizeof env->ymmh_regs);
+ memcpy(env->bnd_regs, &xsave->region[XSAVE_BNDREGS],
+ sizeof env->bnd_regs);
+ memcpy(&env->bndcs_regs, &xsave->region[XSAVE_BNDCSR],
+ sizeof(env->bndcs_regs));
return 0;
}
@@ -1435,6 +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;
@@ -1550,6 +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 e568da2ba4..2de196428d 100644
--- a/target-i386/machine.c
+++ b/target-i386/machine.c
@@ -63,6 +63,21 @@ static const VMStateDescription vmstate_ymmh_reg = {
#define VMSTATE_YMMH_REGS_VARS(_field, _state, _n, _v) \
VMSTATE_STRUCT_ARRAY(_field, _state, _n, _v, vmstate_ymmh_reg, XMMReg)
+static const VMStateDescription vmstate_bnd_regs = {
+ .name = "bnd_regs",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .minimum_version_id_old = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT64(lb, BNDReg),
+ VMSTATE_UINT64(ub, BNDReg),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+#define VMSTATE_BND_REGS(_field, _state, _n) \
+ VMSTATE_STRUCT_ARRAY(_field, _state, _n, 0, vmstate_bnd_regs, BNDReg)
+
static const VMStateDescription vmstate_mtrr_var = {
.name = "mtrr_var",
.version_id = 1,
@@ -506,6 +521,39 @@ static const VMStateDescription vmstate_msr_architectural_pmu = {
}
};
+static bool mpx_needed(void *opaque)
+{
+ X86CPU *cpu = opaque;
+ CPUX86State *env = &cpu->env;
+ unsigned int i;
+
+ for (i = 0; i < 4; i++) {
+ if (env->bnd_regs[i].lb || env->bnd_regs[i].ub) {
+ return true;
+ }
+ }
+
+ if (env->bndcs_regs.cfgu || env->bndcs_regs.sts) {
+ return true;
+ }
+
+ return !!env->msr_bndcfgs;
+}
+
+static const VMStateDescription vmstate_mpx = {
+ .name = "cpu/mpx",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .minimum_version_id_old = 1,
+ .fields = (VMStateField[]) {
+ 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()
+ }
+};
+
const VMStateDescription vmstate_x86_cpu = {
.name = "cpu",
.version_id = 12,
@@ -638,6 +686,9 @@ const VMStateDescription vmstate_x86_cpu = {
.vmsd = &vmstate_msr_architectural_pmu,
.needed = pmu_enable_needed,
} , {
+ .vmsd = &vmstate_mpx,
+ .needed = mpx_needed,
+ } , {
/* empty */
}
}
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-24 21:27:14 +0000