Commit d8c3b52c authored by Borislav Petkov's avatar Borislav Petkov Committed by Thomas Gleixner

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: default avatarBorislav Petkov <bp@suse.de>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Tested-by: default avatarTom Lendacky <thomas.lendacky@amd.com>
Tested-by: default avatarAshok 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
parent 30ec26da
......@@ -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;
if (!mc) {
/* Look for a newer patch in our cache: */
mc = find_patch(uci);
if (!mc) {
mc = uci->mc;
if (!mc)
return UCODE_NFOUND;
}
......
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