diff options
| author |   Borislav Petkov <bp@suse.de> | 2018-02-28 11:28:44 +0100 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2018-03-08 10:19:26 +0100 |
| commit | d8c3b52c00a05036e0a6b315b4b17921a7b67997 (patch) | |
| tree | 08c87d0ddebfdb201d7159673361fb13aaabfb95 /arch | |
| parent | x86/microcode: Do not upload microcode if CPUs are offline (diff) | |
| download | linux-dev-d8c3b52c00a05036e0a6b315b4b17921a7b67997.tar.xz linux-dev-d8c3b52c00a05036e0a6b315b4b17921a7b67997.zip | |
x86/microcode/intel: Look into the patch cache first
The cache might contain a newer patch - look in there first.
A follow-on change will make sure newest patches are loaded into the
cache of microcode patches.
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Tom Lendacky <thomas.lendacky@amd.com>
Tested-by: Ashok Raj <ashok.raj@intel.com>
Cc: Arjan Van De Ven <arjan.van.de.ven@intel.com>
Link: https://lkml.kernel.org/r/20180228102846.13447-6-bp@alien8.de
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/cpu/microcode/intel.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/arch/x86/kernel/cpu/microcode/intel.c b/arch/x86/kernel/cpu/microcode/intel.c index e2864bc2d575..2aded9db1d42 100644 --- a/arch/x86/kernel/cpu/microcode/intel.c +++ b/arch/x86/kernel/cpu/microcode/intel.c @@ -791,9 +791,9 @@ static int collect_cpu_info(int cpu_num, struct cpu_signature *csig) static enum ucode_state apply_microcode_intel(int cpu) { - struct microcode_intel *mc; - struct ucode_cpu_info *uci; + struct ucode_cpu_info *uci = ucode_cpu_info + cpu; struct cpuinfo_x86 *c = &cpu_data(cpu); + struct microcode_intel *mc; static int prev_rev; u32 rev; @@ -801,11 +801,10 @@ static enum ucode_state apply_microcode_intel(int cpu) if (WARN_ON(raw_smp_processor_id() != cpu)) return UCODE_ERROR; - uci = ucode_cpu_info + cpu; - mc = uci->mc; + /* Look for a newer patch in our cache: */ + mc = find_patch(uci); if (!mc) { - /* Look for a newer patch in our cache: */ - mc = find_patch(uci); + mc = uci->mc; if (!mc) return UCODE_NFOUND; } |