Re: [PATCH] powerpc: Fix P10 PVR revision in /proc/cpuinfo for SMT4 cores
From: Vaidyanathan Srinivasan <hidden>
Date: 2020-08-03 10:38:46
* Michael Neuling [off-list ref] [2020-08-03 13:56:00]:
On POWER10 bit 12 in the PVR indicates if the core is SMT4 or
SMT8. Bit 12 is set for SMT4.
Without this patch, /proc/cpuinfo on a SMT4 DD1 POWER10 looks like
this:
cpu : POWER10, altivec supported
revision : 17.0 (pvr 0080 1100)
Signed-off-by: Michael Neuling <redacted>Reviewed-by: Vaidyanathan Srinivasan <redacted>
quoted hunk ↗ jump to hunk
--- arch/powerpc/kernel/setup-common.c | 1 + 1 file changed, 1 insertion(+)diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c index b198b0ff25..808ec9fab6 100644 --- a/arch/powerpc/kernel/setup-common.c +++ b/arch/powerpc/kernel/setup-common.c@@ -311,6 +311,7 @@ static int show_cpuinfo(struct seq_file *m, void *v) min = pvr & 0xFF; break; case 0x004e: /* POWER9 bits 12-15 give chip type */ + case 0x0080: /* POWER10 bit 12 gives SMT8/4 */
Correct. P9 and P10 have chip type (smt4 vs smt8 core) encoded in bits PVR chip type bits 12-15. Thanks for the fix. --Vaidy