The Socket ID is ApicId[bits] on Fam17h systems. Change substraction to logical AND when extracting socket_id from c->apicid.
Signed-off-by: Yazen Ghannam <[email protected]> --- arch/x86/kernel/cpu/amd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index f5c69d8..479555f 100644 --- a/arch/x86/kernel/cpu/amd.c +++ b/arch/x86/kernel/cpu/amd.c @@ -365,7 +365,7 @@ static void amd_detect_cmp(struct cpuinfo_x86 *c) if (c->x86 != 0x17 || !cpuid_edx(0x80000006)) return; - socket_id = (c->apicid >> bits) - 1; + socket_id = (c->apicid >> bits) & 1; core_complex_id = (c->apicid & ((1 << bits) - 1)) >> 3; per_cpu(cpu_llc_id, cpu) = (socket_id << 3) | core_complex_id; -- 1.9.1
