linux-kernel - [PATCH 4.19 191/361] cpupower: Fix AMD Family 0x17 msr

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Date:   Sun, 11 Nov 2018 14:18:58 -0800
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Prarit Bhargava <prarit@...hat.com>,
        Shuah Khan <shuah@...nel.org>,
        Stafford Horne <shorne@...il.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 191/361] cpupower: Fix AMD Family 0x17 msr_pstate size

4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Prarit Bhargava <prarit@...hat.com>

[ Upstream commit 8c22e2f695920ebd94f9a53bcf2a65eb36d4dba1 ]

The msr_pstate data is only 63 bits long and should be 64 bits.

Add in the missing bit from res1 for AMD Family 0x17.

Reference: https://www.amd.com/system/files/TechDocs/54945_PPR_Family_17h_Models_00h-0Fh.pdf, page 138.

Signed-off-by: Prarit Bhargava <prarit@...hat.com>
Cc: Shuah Khan <shuah@...nel.org>
Cc: Stafford Horne <shorne@...il.com>
Signed-off-by: Shuah Khan (Samsung OSG) <shuah@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 tools/power/cpupower/utils/helpers/amd.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/tools/power/cpupower/utils/helpers/amd.c
+++ b/tools/power/cpupower/utils/helpers/amd.c
@@ -33,7 +33,7 @@ union msr_pstate {
 		unsigned vid:8;
 		unsigned iddval:8;
 		unsigned idddiv:2;
-		unsigned res1:30;
+		unsigned res1:31;
 		unsigned en:1;
 	} fam17h_bits;
 	unsigned long long val;