* [PATCH v2] turbostat: Read extended processor family from CPUID
@ 2018-07-27 11:38 Calvin Walton
2018-07-27 11:50 ` [PATCH v3] " Calvin Walton
0 siblings, 1 reply; 3+ messages in thread
From: Calvin Walton @ 2018-07-27 11:38 UTC (permalink / raw)
To: Len Brown, linux-pm, linux-kernel; +Cc: Calvin Walton
This fixes the reported family on modern AMD processors (e.g. Ryzen,
which is family 0x17). Previously these processors all showed up as
family 0xf.
See the document
https://support.amd.com/TechDocs/56255_OSRR.pdf
section CPUID_Fn00000001_EAX for how to calculate the family
from the BaseFamily and ExtFamily values.
This matches the code in arch/x86/lib/cpu.c
Signed-off-by: Calvin Walton <calvin.walton@kepstin.ca>
---
I'm still working on updating the RAPL patch on top of the changes for
v4.18, but this CPUID fix doesn't have to wait.
tools/power/x86/turbostat/turbostat.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index bd9c6b31a504..8452ace384b3 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -4031,7 +4031,9 @@ void process_cpuid()
family = (fms >> 8) & 0xf;
model = (fms >> 4) & 0xf;
stepping = fms & 0xf;
- if (family == 6 || family == 0xf)
+ if (family == 0xf)
+ family += (fms >> 20) & 0xff;
+ if (family == 6 || family >= 0xf)
model += ((fms >> 16) & 0xf) << 4;
if (!quiet) {
--
2.18.0
^ permalink raw reply related [flat|nested] 3+ messages in thread
* [PATCH v3] turbostat: Read extended processor family from CPUID
2018-07-27 11:38 [PATCH v2] turbostat: Read extended processor family from CPUID Calvin Walton
@ 2018-07-27 11:50 ` Calvin Walton
2018-07-27 16:49 ` Len Brown
0 siblings, 1 reply; 3+ messages in thread
From: Calvin Walton @ 2018-07-27 11:50 UTC (permalink / raw)
To: Len Brown, linux-pm, linux-kernel; +Cc: Calvin Walton
This fixes the reported family on modern AMD processors (e.g. Ryzen,
which is family 0x17). Previously these processors all showed up as
family 0xf.
See the document
https://support.amd.com/TechDocs/56255_OSRR.pdf
section CPUID_Fn00000001_EAX for how to calculate the family
from the BaseFamily and ExtFamily values.
This matches the code in arch/x86/lib/cpu.c
Signed-off-by: Calvin Walton <calvin.walton@kepstin.ca>
---
v3: Having just looked at the arch/x86/lib/cpu.c code again, I realized
that it *didn't* actually match - the kernel code uses family >= 6 for
applying the extended model number, while I was applying it only to
family == 6 or family >= 0xf. Change that to match for consistency.
v2: I'm still working on updating the RAPL patch on top of the changes for
v4.18, but this CPUID fix doesn't have to wait.
tools/power/x86/turbostat/turbostat.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index bd9c6b31a504..ed024deed36f 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -4031,7 +4031,9 @@ void process_cpuid()
family = (fms >> 8) & 0xf;
model = (fms >> 4) & 0xf;
stepping = fms & 0xf;
- if (family == 6 || family == 0xf)
+ if (family == 0xf)
+ family += (fms >> 20) & 0xff;
+ if (family >= 6)
model += ((fms >> 16) & 0xf) << 4;
if (!quiet) {
--
2.18.0
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH v3] turbostat: Read extended processor family from CPUID
2018-07-27 11:50 ` [PATCH v3] " Calvin Walton
@ 2018-07-27 16:49 ` Len Brown
0 siblings, 0 replies; 3+ messages in thread
From: Len Brown @ 2018-07-27 16:49 UTC (permalink / raw)
To: Calvin Walton; +Cc: Linux PM list, linux-kernel
Applied -- thanks!
On Fri, Jul 27, 2018 at 7:50 AM Calvin Walton <calvin.walton@kepstin.ca> wrote:
>
> This fixes the reported family on modern AMD processors (e.g. Ryzen,
> which is family 0x17). Previously these processors all showed up as
> family 0xf.
>
> See the document
> https://support.amd.com/TechDocs/56255_OSRR.pdf
> section CPUID_Fn00000001_EAX for how to calculate the family
> from the BaseFamily and ExtFamily values.
>
> This matches the code in arch/x86/lib/cpu.c
>
> Signed-off-by: Calvin Walton <calvin.walton@kepstin.ca>
> ---
>
> v3: Having just looked at the arch/x86/lib/cpu.c code again, I realized
> that it *didn't* actually match - the kernel code uses family >= 6 for
> applying the extended model number, while I was applying it only to
> family == 6 or family >= 0xf. Change that to match for consistency.
>
> v2: I'm still working on updating the RAPL patch on top of the changes for
> v4.18, but this CPUID fix doesn't have to wait.
>
> tools/power/x86/turbostat/turbostat.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
> index bd9c6b31a504..ed024deed36f 100644
> --- a/tools/power/x86/turbostat/turbostat.c
> +++ b/tools/power/x86/turbostat/turbostat.c
> @@ -4031,7 +4031,9 @@ void process_cpuid()
> family = (fms >> 8) & 0xf;
> model = (fms >> 4) & 0xf;
> stepping = fms & 0xf;
> - if (family == 6 || family == 0xf)
> + if (family == 0xf)
> + family += (fms >> 20) & 0xff;
> + if (family >= 6)
> model += ((fms >> 16) & 0xf) << 4;
>
> if (!quiet) {
> --
> 2.18.0
>
--
Len Brown, Intel Open Source Technology Center
^ permalink raw reply [flat|nested] 3+ messages in thread
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2018-07-27 11:38 [PATCH v2] turbostat: Read extended processor family from CPUID Calvin Walton
2018-07-27 11:50 ` [PATCH v3] " Calvin Walton
2018-07-27 16:49 ` Len Brown
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