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openSUSE:Maintenance:8484
xen.openSUSE_Leap_42.3_Update
qemut-add-support-for-cpuid-MSR_IA32_SPEC_CTRL....
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File qemut-add-support-for-cpuid-MSR_IA32_SPEC_CTRL.patch of Package xen.openSUSE_Leap_42.3_Update
From: Wei Wang <wei.w.wang@intel.com> Date: Tue, 7 Nov 2017 16:39:49 +0800 Subject: [PATCH] i386/kvm: MSR_IA32_SPEC_CTRL and MSR_IA32_PRED_CMD CPUID(EAX=0X7,ECX=0).EDX[26]/[27] indicates the support of MSR_IA32_SPEC_CTRL and MSR_IA32_PRED_CMD. Expose the CPUID to the guest. Also add the support of transferring the MSRs during live migration. Signed-off-by: Wei Wang <wei.w.wang@intel.com> --- Index: xen-4.9.1-testing/tools/qemu-xen-traditional-dir-remote/target-i386/helper.c =================================================================== --- xen-4.9.1-testing.orig/tools/qemu-xen-traditional-dir-remote/target-i386/helper.c +++ xen-4.9.1-testing/tools/qemu-xen-traditional-dir-remote/target-i386/helper.c @@ -1528,6 +1528,21 @@ void cpu_x86_cpuid(CPUX86State *env, uin *ecx = 0; *edx = 0; break; + case 7: + /* Structured Extended Feature Flags Enumeration Leaf */ + if (count == 0) { + host_cpuid(index, 0, eax, ebx, ecx, edx); + *eax = 0; /* Maximum ECX value for sub-leaves */ + *ebx = 0; /* Feature flags */ + *ecx = 0; /* Reserved */ + *edx = env->cpuid_features | *edx; + } else { + *eax = 0; + *ebx = 0; + *ecx = 0; + *edx = 0; + } + break; case 9: /* Direct Cache Access Information Leaf */ *eax = 0; /* Bits 0-31 in DCA_CAP MSR */ Index: xen-4.9.1-testing/tools/qemu-xen-traditional-dir-remote/target-i386/cpu.h =================================================================== --- xen-4.9.1-testing.orig/tools/qemu-xen-traditional-dir-remote/target-i386/cpu.h +++ xen-4.9.1-testing/tools/qemu-xen-traditional-dir-remote/target-i386/cpu.h @@ -250,6 +250,7 @@ #define MSR_IA32_APICBASE_BSP (1<<8) #define MSR_IA32_APICBASE_ENABLE (1<<11) #define MSR_IA32_APICBASE_BASE (0xfffff<<12) +#define MSR_IA32_SPEC_CTRL 0x00000048 #define MSR_MTRRcap 0xfe #define MSR_MTRRcap_VCNT 8 @@ -382,6 +383,9 @@ #define CPUID_EXT3_IBS (1 << 10) #define CPUID_EXT3_SKINIT (1 << 12) +#define CPUID_7_0_EDX_SPEC_CTRL (1U << 26) +#define CPUID_7_0_EDX_PRED_CMD (1U << 27) + #define CPUID_VENDOR_INTEL_1 0x756e6547 /* "Genu" */ #define CPUID_VENDOR_INTEL_2 0x49656e69 /* "ineI" */ #define CPUID_VENDOR_INTEL_3 0x6c65746e /* "ntel" */ @@ -670,6 +674,7 @@ typedef struct CPUX86State { /* in order to simplify APIC support, we leave this pointer to the user */ struct APICState *apic_state; + uint64_t spec_ctrl; } CPUX86State; CPUX86State *cpu_x86_init(const char *cpu_model); Index: xen-4.9.1-testing/tools/qemu-xen-traditional-dir-remote/target-i386/kvm.c =================================================================== --- xen-4.9.1-testing.orig/tools/qemu-xen-traditional-dir-remote/target-i386/kvm.c +++ xen-4.9.1-testing/tools/qemu-xen-traditional-dir-remote/target-i386/kvm.c @@ -129,48 +129,73 @@ int kvm_arch_init_vcpu(CPUState *env) return kvm_vcpu_ioctl(env, KVM_SET_CPUID2, &cpuid_data); } -static int kvm_has_msr_star(CPUState *env) +static int kvm_has_msr(CPUState *env, int msr) { - static int has_msr_star; - int ret; + int ret, has_msr; + struct kvm_msr_list msr_list, *kvm_msr_list; - /* first time */ - if (has_msr_star == 0) { - struct kvm_msr_list msr_list, *kvm_msr_list; + has_msr = -1; - has_msr_star = -1; - - /* Obtain MSR list from KVM. These are the MSRs that we must - * save/restore */ - msr_list.nmsrs = 0; - ret = kvm_ioctl(env->kvm_state, KVM_GET_MSR_INDEX_LIST, &msr_list); - if (ret < 0) - return 0; + /* Obtain MSR list from KVM. These are the MSRs that we must + * save/restore */ + msr_list.nmsrs = 0; + ret = kvm_ioctl(env->kvm_state, KVM_GET_MSR_INDEX_LIST, &msr_list); + if (ret < 0) + return 0; - kvm_msr_list = qemu_mallocz(sizeof(msr_list) + - msr_list.nmsrs * sizeof(msr_list.indices[0])); + kvm_msr_list = qemu_mallocz(sizeof(msr_list) + + msr_list.nmsrs * sizeof(msr_list.indices[0])); - kvm_msr_list->nmsrs = msr_list.nmsrs; - ret = kvm_ioctl(env->kvm_state, KVM_GET_MSR_INDEX_LIST, kvm_msr_list); - if (ret >= 0) { - int i; - - for (i = 0; i < kvm_msr_list->nmsrs; i++) { - if (kvm_msr_list->indices[i] == MSR_STAR) { - has_msr_star = 1; - break; - } + kvm_msr_list->nmsrs = msr_list.nmsrs; + ret = kvm_ioctl(env->kvm_state, KVM_GET_MSR_INDEX_LIST, kvm_msr_list); + if (ret >= 0) { + int i; + + for (i = 0; i < kvm_msr_list->nmsrs; i++) { + if (kvm_msr_list->indices[i] == msr) { + has_msr = 1; + break; } } - - free(kvm_msr_list); } + free(kvm_msr_list); + + if (has_msr == 1) + return 1; + return 0; +} + +static int kvm_has_msr_star(CPUState *env) + static int has_msr_star; + + /* first time */ + if (has_msr_star == 0) { + has_msr_star = -1; + + if (kvm_has_msr(env, MSR_STAR)) + has_msr_star = 1; + } if (has_msr_star == 1) return 1; return 0; } +static int kvm_has_msr_spec_ctrl(CPUState *env) + static int has_msr_spec_ctrl; + + /* first time */ + if (has_msr_spec_ctrl == 0) { + has_msr_spec_ctrl = -1; + + if (kvm_has_msr(env, MSR_IA32_SPEC_CTRL)) + has_msr_spec_ctrl = 1; + } + if (has_msr_spec_ctrl == 1) + return 1; + return 0; +} + int kvm_arch_init(KVMState *s, int smp_cpus) { int ret; @@ -379,8 +404,10 @@ static int kvm_put_msrs(CPUState *env) kvm_msr_entry_set(&msrs[n++], MSR_IA32_SYSENTER_CS, env->sysenter_cs); kvm_msr_entry_set(&msrs[n++], MSR_IA32_SYSENTER_ESP, env->sysenter_esp); kvm_msr_entry_set(&msrs[n++], MSR_IA32_SYSENTER_EIP, env->sysenter_eip); - if (kvm_has_msr_star(env)) + if (kvm_has_msr_star(env, MSR_STAR)) kvm_msr_entry_set(&msrs[n++], MSR_STAR, env->star); + if (kvm_has_msr_spec_ctrl(env, MSR_IA32_SPEC_CTRL) + kvm_msr_entry_set(&msrs[n++], MSR_IA32_SPEC_CTRL, env->spec_ctrl); kvm_msr_entry_set(&msrs[n++], MSR_IA32_TSC, env->tsc); #ifdef TARGET_X86_64 /* FIXME if lm capable */ @@ -515,6 +542,8 @@ static int kvm_get_msrs(CPUState *env) if (kvm_has_msr_star(env)) msrs[n++].index = MSR_STAR; msrs[n++].index = MSR_IA32_TSC; + if (kvm_has_msr_spec_ctrl(env)) + msrs[n++].index = MSR_IA32_SPEC_CTRL; #ifdef TARGET_X86_64 /* FIXME lm_capable_kernel */ msrs[n++].index = MSR_CSTAR; @@ -558,6 +587,9 @@ static int kvm_get_msrs(CPUState *env) case MSR_IA32_TSC: env->tsc = msrs[i].data; break; + case MSR_IA32_SPEC_CTRL: + env->spec_ctrl = msrs[i].data; + break; } } @@ -680,6 +712,9 @@ int kvm_arch_handle_exit(CPUState *env, ret = kvm_handle_halt(env); break; } + if (has_msr_spec_ctrl) { + kvm_msr_entry_add(cpu, MSR_IA32_SPEC_CTRL, 0); + } return ret; } Index: xen-4.9.1-testing/tools/qemu-xen-traditional-dir-remote/target-i386/machine.c =================================================================== --- xen-4.9.1-testing.orig/tools/qemu-xen-traditional-dir-remote/target-i386/machine.c +++ xen-4.9.1-testing/tools/qemu-xen-traditional-dir-remote/target-i386/machine.c @@ -143,6 +143,7 @@ void cpu_save(QEMUFile *f, void *opaque) qemu_put_be64s(f, &env->mtrr_var[i].base); qemu_put_be64s(f, &env->mtrr_var[i].mask); } + qemu_put_be64s(f, &env->spec_ctrl); } #ifdef USE_X86LDOUBLE @@ -321,6 +322,7 @@ int cpu_load(QEMUFile *f, void *opaque, qemu_get_be64s(f, &env->mtrr_var[i].base); qemu_get_be64s(f, &env->mtrr_var[i].mask); } + qemu_get_be64s(f, &env->spec_ctrl); } /* XXX: ensure compatiblity for halted bit ? */
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