From: Michael Neuling <mikey@neuling.org>
To: mpe@ellerman.id.au
Cc: grimm@linux.ibm.com, linuxppc-dev@lists.ozlabs.org,
Michael Neuling <mikey@neuling.org>
Subject: [PATCH] powerpc: Fix P10 PVR revision in /proc/cpuinfo for SMT4 cores
Date: Mon, 3 Aug 2020 13:56:00 +1000 [thread overview]
Message-ID: <20200803035600.1820371-1-mikey@neuling.org> (raw)
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 <mikey@neuling.org>
---
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 */
maj = (pvr >> 8) & 0x0F;
min = pvr & 0xFF;
break;
--
2.26.2
next reply other threads:[~2020-08-03 3:58 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-03 3:56 Michael Neuling [this message]
2020-08-03 10:32 ` [PATCH] powerpc: Fix P10 PVR revision in /proc/cpuinfo for SMT4 cores Vaidyanathan Srinivasan
2020-08-03 12:41 ` Michael Ellerman
2020-08-13 0:34 ` Michael Neuling
2020-08-18 3:21 ` Michael Ellerman
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