renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-20 19:23:57 +08:00
Code

x86: ucode-amd: Move family check to microcde_amd.c's init function

Browse Source 
... to avoid useless trial to load firmware on systems with
unsupported AMD CPUs.

Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Dmitry Adamushko <dmitry.adamushko@gmail.com>
Cc: Mike Travis <travis@sgi.com>
Cc: Tigran Aivazian <tigran@aivazian.fsnet.co.uk>
Cc: Borislav Petkov <borislav.petkov@amd.com>
Cc: Andreas Mohr <andi@lisas.de>
Cc: Jack Steiner <steiner@sgi.com>
LKML-Reference: <20091117070638.GA27691@alberich.amd.com>
[ v2: changed BUG_ON() to WARN_ON() ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Andreas Herrmann 2009-11-17 08:06:38 +01:00 committed by Ingo Molnar
parent 9f15226e75
commit 8cc2361bd0
1 changed files with 15 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
arch/x86/kernel/microcode_amd.c
View File

@ -34,6 +34,7 @@ MODULE_LICENSE("GPL v2");
#define UCODE_UCODE_TYPE 0x00000001
const struct firmware *firmware;
static int supported_cpu;
struct equiv_cpu_entry {
u32 installed_cpu;
@ -73,15 +74,12 @@ static struct equiv_cpu_entry *equiv_cpu_table;
static int collect_cpu_info_amd(int cpu, struct cpu_signature *csig)
{
struct cpuinfo_x86 *c = &cpu_data(cpu);
u32 dummy;
memset(csig, 0, sizeof(*csig));
if (c->x86_vendor != X86_VENDOR_AMD || c->x86 < 0x10) {
pr_warning("microcode: CPU%d: AMD CPU family 0x%x not "
"supported\n", cpu, c->x86);
if (!supported_cpu)
return -1;
}
memset(csig, 0, sizeof(*csig));
rdmsr(MSR_AMD64_PATCH_LEVEL, csig->rev, dummy);
pr_info("microcode: CPU%d: patch_level=0x%x\n", cpu, csig->rev);
return 0;
@ -331,6 +329,17 @@ static void microcode_fini_cpu_amd(int cpu)
void init_microcode_amd(struct device *device)
{
const char *fw_name = "amd-ucode/microcode_amd.bin";
struct cpuinfo_x86 *c = &boot_cpu_data;
WARN_ON(c->x86_vendor != X86_VENDOR_AMD);
if (c->x86 < 0x10) {
pr_warning("microcode: AMD CPU family 0x%x not supported\n",
c->x86);
return;
}
supported_cpu = 1;
if (request_firmware(&firmware, fw_name, device))
pr_err("microcode: failed to load file %s\n", fw_name);
}