diff options
| author | Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> | 2018-04-27 16:48:00 -0500 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-05-06 12:49:16 +0200 |
| commit | 6c4f5abaf3566dbf5b26e7b14f4392be400f12e3 (patch) | |
| tree | 30c084c51a96b247edfba8dc79de2a7b7ab0f050 /arch/x86/kernel/cpu/topology.c | |
| parent | 68091ee7ac3c1a8786fe1bebbd616b14236efb99 (diff) | |
x86/CPU: Modify detect_extended_topology() to return result
Current implementation does not communicate whether it can successfully
detect CPUID function 0xB information. Therefore, modify the function to
return success or error codes. This will be used by subsequent patches.
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Borislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/1524865681-112110-2-git-send-email-suravee.suthikulpanit@amd.com
Diffstat (limited to 'arch/x86/kernel/cpu/topology.c')
| -rw-r--r-- | arch/x86/kernel/cpu/topology.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/x86/kernel/cpu/topology.c b/arch/x86/kernel/cpu/topology.c index b099024d339c..81c0afb39d0a 100644 --- a/arch/x86/kernel/cpu/topology.c +++ b/arch/x86/kernel/cpu/topology.c @@ -27,7 +27,7 @@ * exists, use it for populating initial_apicid and cpu topology * detection. */ -void detect_extended_topology(struct cpuinfo_x86 *c) +int detect_extended_topology(struct cpuinfo_x86 *c) { #ifdef CONFIG_SMP unsigned int eax, ebx, ecx, edx, sub_index; @@ -36,7 +36,7 @@ void detect_extended_topology(struct cpuinfo_x86 *c) static bool printed; if (c->cpuid_level < 0xb) - return; + return -1; cpuid_count(0xb, SMT_LEVEL, &eax, &ebx, &ecx, &edx); @@ -44,7 +44,7 @@ void detect_extended_topology(struct cpuinfo_x86 *c) * check if the cpuid leaf 0xb is actually implemented. */ if (ebx == 0 || (LEAFB_SUBTYPE(ecx) != SMT_TYPE)) - return; + return -1; set_cpu_cap(c, X86_FEATURE_XTOPOLOGY); @@ -95,6 +95,6 @@ void detect_extended_topology(struct cpuinfo_x86 *c) c->cpu_core_id); printed = 1; } - return; #endif + return 0; } |