The following commit has been merged into the x86/microcode branch of tip:
Commit-ID: 38ab73d770143460b1b85d01ead39cd6eeb857c8
Gitweb: https://git.kernel.org/tip/38ab73d770143460b1b85d01ead39cd6eeb857c8
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Mon, 02 Oct 2023 13:59:47 +02:00
Committer: Borislav Petkov (AMD) <bp@xxxxxxxxx>
CommitterDate: Tue, 03 Oct 2023 16:06:07 +02:00
x86/microcode/intel: Rework intel_cpu_collect_info()
Nothing needs struct ucode_cpu_info. Make it take struct cpu_signature,
let it return a boolean and simplify the implementation. Rename it now
that the silly name clash with collect_cpu_info() is gone.
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Borislav Petkov (AMD) <bp@xxxxxxxxx>
Link: https://lore.kernel.org/r/20231002115902.684026662@xxxxxxxxxxxxx
---
arch/x86/include/asm/cpu.h | 4 +--
arch/x86/kernel/cpu/microcode/intel.c | 33 +++++++-------------------
drivers/platform/x86/intel/ifs/load.c | 8 ++----
3 files changed, 14 insertions(+), 31 deletions(-)
diff --git a/arch/x86/include/asm/cpu.h b/arch/x86/include/asm/cpu.h
index 3a233eb..4066dd3 100644
--- a/arch/x86/include/asm/cpu.h
+++ b/arch/x86/include/asm/cpu.h
@@ -73,9 +73,9 @@ static inline void init_ia32_feat_ctl(struct cpuinfo_x86 *c) {}
extern __noendbr void cet_disable(void);
-struct ucode_cpu_info;
+struct cpu_signature;
-int intel_cpu_collect_info(struct ucode_cpu_info *uci);
+void intel_collect_cpu_info(struct cpu_signature *sig);
static inline bool intel_cpu_signatures_match(unsigned int s1, unsigned int p1,
unsigned int s2, unsigned int p2)
diff --git a/arch/x86/kernel/cpu/microcode/intel.c b/arch/x86/kernel/cpu/microcode/intel.c
index 84d6edf..fd97cc1 100644
--- a/arch/x86/kernel/cpu/microcode/intel.c
+++ b/arch/x86/kernel/cpu/microcode/intel.c
@@ -66,36 +66,21 @@ static inline unsigned int exttable_size(struct extended_sigtable *et)
return et->count * EXT_SIGNATURE_SIZE + EXT_HEADER_SIZE;
}
-int intel_cpu_collect_info(struct ucode_cpu_info *uci)
+void intel_collect_cpu_info(struct cpu_signature *sig)
{
- unsigned int val[2];
- unsigned int family, model;
- struct cpu_signature csig = { 0 };
- unsigned int eax, ebx, ecx, edx;
-
- memset(uci, 0, sizeof(*uci));
-
- eax = 0x00000001;
- ecx = 0;
- native_cpuid(&eax, &ebx, &ecx, &edx);
- csig.sig = eax;
+ sig->sig = cpuid_eax(1);
+ sig->pf = 0;
+ sig->rev = intel_get_microcode_revision();
- family = x86_family(eax);
- model = x86_model(eax);
+ if (x86_model(sig->sig) >= 5 || x86_family(sig->sig) > 6) {
+ unsigned int val[2];
- if (model >= 5 || family > 6) {
/* get processor flags from MSR 0x17 */
native_rdmsr(MSR_IA32_PLATFORM_ID, val[0], val[1]);
- csig.pf = 1 << ((val[1] >> 18) & 7);
+ sig->pf = 1 << ((val[1] >> 18) & 7);
}
-
- csig.rev = intel_get_microcode_revision();
-
- uci->cpu_sig = csig;
-
- return 0;
}
-EXPORT_SYMBOL_GPL(intel_cpu_collect_info);
+EXPORT_SYMBOL_GPL(intel_collect_cpu_info);
/*
* Returns 1 if update has been found, 0 otherwise.
@@ -378,7 +363,7 @@ static __init struct microcode_intel *get_microcode_blob(struct ucode_cpu_info *
if (!(cp.data && cp.size))
return NULL;
- intel_cpu_collect_info(uci);
+ intel_collect_cpu_info(&uci->cpu_sig);
return scan_microcode(cp.data, cp.size, uci);
}
diff --git a/drivers/platform/x86/intel/ifs/load.c b/drivers/platform/x86/intel/ifs/load.c
index cefd0d8..61174bd 100644
--- a/drivers/platform/x86/intel/ifs/load.c
+++ b/drivers/platform/x86/intel/ifs/load.c
@@ -227,7 +227,7 @@ out:
static int image_sanity_check(struct device *dev, const struct microcode_header_intel *data)
{
- struct ucode_cpu_info uci;
+ struct cpu_signature sig;
/* Provide a specific error message when loading an older/unsupported image */
if (data->hdrver != MC_HEADER_TYPE_IFS) {
@@ -240,11 +240,9 @@ static int image_sanity_check(struct device *dev, const struct microcode_header_
return -EINVAL;
}
- intel_cpu_collect_info(&uci);
+ intel_collect_cpu_info(&sig);
- if (!intel_find_matching_signature((void *)data,
- uci.cpu_sig.sig,
- uci.cpu_sig.pf)) {
+ if (!intel_find_matching_signature((void *)data, sig.sig, sig.pf)) {
dev_err(dev, "cpu signature, processor flags not matching\n");
return -EINVAL;
}
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