diff options
Diffstat (limited to 'arch/x86')
-rw-r--r-- | arch/x86/Kconfig | 2 | ||||
-rw-r--r-- | arch/x86/include/asm/msr-index.h | 1 | ||||
-rw-r--r-- | arch/x86/kernel/cpu/amd.c | 10 | ||||
-rw-r--r-- | arch/x86/kvm/vmx/tdx.c | 9 | ||||
-rw-r--r-- | arch/x86/kvm/x86.c | 4 |
5 files changed, 20 insertions, 6 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 5b3362af7d65..8bed9030ad47 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -147,7 +147,7 @@ config X86 select ARCH_WANTS_DYNAMIC_TASK_STRUCT select ARCH_WANTS_NO_INSTR select ARCH_WANT_GENERAL_HUGETLB - select ARCH_WANT_HUGE_PMD_SHARE + select ARCH_WANT_HUGE_PMD_SHARE if X86_64 select ARCH_WANT_LD_ORPHAN_WARN select ARCH_WANT_OPTIMIZE_DAX_VMEMMAP if X86_64 select ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP if X86_64 diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h index b7dded3c8113..5cfb5d74dd5f 100644 --- a/arch/x86/include/asm/msr-index.h +++ b/arch/x86/include/asm/msr-index.h @@ -628,6 +628,7 @@ #define MSR_AMD64_OSVW_STATUS 0xc0010141 #define MSR_AMD_PPIN_CTL 0xc00102f0 #define MSR_AMD_PPIN 0xc00102f1 +#define MSR_AMD64_CPUID_FN_7 0xc0011002 #define MSR_AMD64_CPUID_FN_1 0xc0011004 #define MSR_AMD64_LS_CFG 0xc0011020 #define MSR_AMD64_DC_CFG 0xc0011022 diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index b750ac008b78..329ee185d8cc 100644 --- a/arch/x86/kernel/cpu/amd.c +++ b/arch/x86/kernel/cpu/amd.c @@ -974,6 +974,16 @@ static void init_amd_zen2(struct cpuinfo_x86 *c) init_spectral_chicken(c); fix_erratum_1386(c); zen2_zenbleed_check(c); + + /* Disable RDSEED on AMD Cyan Skillfish because of an error. */ + if (c->x86_model == 0x47 && c->x86_stepping == 0x0) { + clear_cpu_cap(c, X86_FEATURE_RDSEED); + msr_clear_bit(MSR_AMD64_CPUID_FN_7, 18); + pr_emerg("RDSEED is not reliable on this platform; disabling.\n"); + } + + /* Correct misconfigured CPUID on some clients. */ + clear_cpu_cap(c, X86_FEATURE_INVLPGB); } static void init_amd_zen3(struct cpuinfo_x86 *c) diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c index f31ccdeb905b..ec79aacc446f 100644 --- a/arch/x86/kvm/vmx/tdx.c +++ b/arch/x86/kvm/vmx/tdx.c @@ -173,7 +173,6 @@ static void td_init_cpuid_entry2(struct kvm_cpuid_entry2 *entry, unsigned char i tdx_clear_unsupported_cpuid(entry); } -#define TDVMCALLINFO_GET_QUOTE BIT(0) #define TDVMCALLINFO_SETUP_EVENT_NOTIFY_INTERRUPT BIT(1) static int init_kvm_tdx_caps(const struct tdx_sys_info_td_conf *td_conf, @@ -192,7 +191,6 @@ static int init_kvm_tdx_caps(const struct tdx_sys_info_td_conf *td_conf, caps->cpuid.nent = td_conf->num_cpuid_config; caps->user_tdvmcallinfo_1_r11 = - TDVMCALLINFO_GET_QUOTE | TDVMCALLINFO_SETUP_EVENT_NOTIFY_INTERRUPT; for (i = 0; i < td_conf->num_cpuid_config; i++) @@ -2271,25 +2269,26 @@ static int tdx_get_capabilities(struct kvm_tdx_cmd *cmd) const struct tdx_sys_info_td_conf *td_conf = &tdx_sysinfo->td_conf; struct kvm_tdx_capabilities __user *user_caps; struct kvm_tdx_capabilities *caps = NULL; + u32 nr_user_entries; int ret = 0; /* flags is reserved for future use */ if (cmd->flags) return -EINVAL; - caps = kmalloc(sizeof(*caps) + + caps = kzalloc(sizeof(*caps) + sizeof(struct kvm_cpuid_entry2) * td_conf->num_cpuid_config, GFP_KERNEL); if (!caps) return -ENOMEM; user_caps = u64_to_user_ptr(cmd->data); - if (copy_from_user(caps, user_caps, sizeof(*caps))) { + if (get_user(nr_user_entries, &user_caps->cpuid.nent)) { ret = -EFAULT; goto out; } - if (caps->cpuid.nent < td_conf->num_cpuid_config) { + if (nr_user_entries < td_conf->num_cpuid_config) { ret = -E2BIG; goto out; } diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 357b9e3a6cef..93636f77c42d 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -6188,6 +6188,10 @@ long kvm_arch_vcpu_ioctl(struct file *filp, u32 user_tsc_khz; r = -EINVAL; + + if (vcpu->arch.guest_tsc_protected) + goto out; + user_tsc_khz = (u32)arg; if (kvm_caps.has_tsc_control && |