diff options
author | Jani Nikula <jani.nikula@intel.com> | 2024-06-19 11:38:31 +0300 |
---|---|---|
committer | Jani Nikula <jani.nikula@intel.com> | 2024-06-19 11:38:31 +0300 |
commit | d754ed2821fd9675d203cb73c4afcd593e28b7d0 (patch) | |
tree | cd16683cd956a7c334d7e1b3baf02e2e7baa729c /arch/x86/kernel/cpu/intel.c | |
parent | dcaacff03a9fa2838f936e1009b4b7ad56807152 (diff) | |
parent | 1ddaaa244021aba8496536a6627b4ad2bc0f936a (diff) |
Merge drm/drm-next into drm-intel-next
Sync to v6.10-rc3.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Diffstat (limited to 'arch/x86/kernel/cpu/intel.c')
-rw-r--r-- | arch/x86/kernel/cpu/intel.c | 26 |
1 files changed, 17 insertions, 9 deletions
diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c index be30d7fa2e66..fdf3489d92a4 100644 --- a/arch/x86/kernel/cpu/intel.c +++ b/arch/x86/kernel/cpu/intel.c @@ -228,6 +228,7 @@ static void detect_tme_early(struct cpuinfo_x86 *c) if (!TME_ACTIVATE_LOCKED(tme_activate) || !TME_ACTIVATE_ENABLED(tme_activate)) { pr_info_once("x86/tme: not enabled by BIOS\n"); mktme_status = MKTME_DISABLED; + clear_cpu_cap(c, X86_FEATURE_TME); return; } @@ -268,19 +269,26 @@ detect_keyid_bits: c->x86_phys_bits -= keyid_bits; } +void intel_unlock_cpuid_leafs(struct cpuinfo_x86 *c) +{ + if (boot_cpu_data.x86_vendor != X86_VENDOR_INTEL) + return; + + if (c->x86 < 6 || (c->x86 == 6 && c->x86_model < 0xd)) + return; + + /* + * The BIOS can have limited CPUID to leaf 2, which breaks feature + * enumeration. Unlock it and update the maximum leaf info. + */ + if (msr_clear_bit(MSR_IA32_MISC_ENABLE, MSR_IA32_MISC_ENABLE_LIMIT_CPUID_BIT) > 0) + c->cpuid_level = cpuid_eax(0); +} + static void early_init_intel(struct cpuinfo_x86 *c) { u64 misc_enable; - /* Unmask CPUID levels if masked: */ - if (c->x86 > 6 || (c->x86 == 6 && c->x86_model >= 0xd)) { - if (msr_clear_bit(MSR_IA32_MISC_ENABLE, - MSR_IA32_MISC_ENABLE_LIMIT_CPUID_BIT) > 0) { - c->cpuid_level = cpuid_eax(0); - get_cpu_cap(c); - } - } - if ((c->x86 == 0xf && c->x86_model >= 0x03) || (c->x86 == 0x6 && c->x86_model >= 0x0e)) set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC); |