[PATCH AUTOSEL 4.19 177/237] tools/power turbosat: fix AMD APIC-id output

Sasha Levin
2019-11-16T15:46:36Z

From: Len Brown <len.brown@intel.com>

[ Upstream commit 3404155190ce09a1e5d8407e968fc19aac4493e3 ]

turbostat recently gained a feature adding APIC and X2APIC columns.
While they are disabled by-default, they are enabled with --debug
or when explicitly requested, eg.

$ sudo turbostat --quiet --show Package,Node,Core,CPU,APIC,X2APIC date

But these columns erroneously showed zeros on AMD hardware.
This patch corrects the APIC and X2APIC [sic] columns on AMD.

Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
tools/power/x86/turbostat/turbostat.c | 93 +++++++++++++++++----------
1 file changed, 60 insertions(+), 33 deletions(-)

diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index 823bbc741ad7a..02d123871ef95 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -1,6 +1,6 @@
/*
* turbostat -- show CPU frequency and C-state residency
- * on modern Intel turbo-capable processors.
+ * on modern Intel and AMD processors.
*
* Copyright (c) 2013 Intel Corporation.
* Len Brown <len.brown@intel.com>
@@ -71,6 +71,8 @@ unsigned int do_irtl_snb;
unsigned int do_irtl_hsw;
unsigned int units = 1000000; /* MHz etc */
unsigned int genuine_intel;
+unsigned int authentic_amd;
+unsigned int max_level, max_extended_level;
unsigned int has_invariant_tsc;
unsigned int do_nhm_platform_info;
unsigned int no_MSR_MISC_PWR_MGMT;
@@ -1667,30 +1669,51 @@ int get_mp(int cpu, struct msr_counter *mp, unsigned long long *counterp)

void get_apic_id(struct thread_data *t)
{
- unsigned int eax, ebx, ecx, edx, max_level;
+ unsigned int eax, ebx, ecx, edx;

- eax = ebx = ecx = edx = 0;
+ if (DO_BIC(BIC_APIC)) {
+ eax = ebx = ecx = edx = 0;
+ __cpuid(1, eax, ebx, ecx, edx);

- if (!genuine_intel)
+ t->apic_id = (ebx >> 24) & 0xff;
+ }
+
+ if (!DO_BIC(BIC_X2APIC))
return;

- __cpuid(0, max_level, ebx, ecx, edx);
+ if (authentic_amd) {
+ unsigned int topology_extensions;

- __cpuid(1, eax, ebx, ecx, edx);
- t->apic_id = (ebx >> 24) & 0xf;
+ if (max_extended_level < 0x8000001e)
+ return;

- if (max_level < 0xb)
+ eax = ebx = ecx = edx = 0;
+ __cpuid(0x80000001, eax, ebx, ecx, edx);
+ topology_extensions = ecx & (1 << 22);
+
+ if (topology_extensions == 0)
+ return;
+
+ eax = ebx = ecx = edx = 0;
+ __cpuid(0x8000001e, eax, ebx, ecx, edx);
+
+ t->x2apic_id = eax;
return;
+ }

- if (!DO_BIC(BIC_X2APIC))
+ if (!genuine_intel)
+ return;
+
+ if (max_level < 0xb)
return;

ecx = 0;
__cpuid(0xb, eax, ebx, ecx, edx);
t->x2apic_id = edx;

- if (debug && (t->apic_id != t->x2apic_id))
- fprintf(outf, "cpu%d: apic 0x%x x2apic 0x%x\n", t->cpu_id, t->apic_id, t->x2apic_id);
+ if (debug && (t->apic_id != (t->x2apic_id & 0xff)))
+ fprintf(outf, "cpu%d: BIOS BUG: apic 0x%x x2apic 0x%x\n",
+ t->cpu_id, t->apic_id, t->x2apic_id);
}

/*
@@ -4439,16 +4462,18 @@ void decode_c6_demotion_policy_msr(void)

void process_cpuid()
{
- unsigned int eax, ebx, ecx, edx, max_level, max_extended_level;
- unsigned int fms, family, model, stepping;
+ unsigned int eax, ebx, ecx, edx;
+ unsigned int fms, family, model, stepping, ecx_flags, edx_flags;
unsigned int has_turbo;

eax = ebx = ecx = edx = 0;

__cpuid(0, max_level, ebx, ecx, edx);

- if (ebx == 0x756e6547 && edx == 0x49656e69 && ecx == 0x6c65746e)
+ if (ebx == 0x756e6547 && ecx == 0x6c65746e && edx == 0x49656e69)
genuine_intel = 1;
+ else if (ebx == 0x68747541 && ecx == 0x444d4163 && edx == 0x69746e65)
+ authentic_amd = 1;

if (!quiet)
fprintf(outf, "CPUID(0): %.4s%.4s%.4s ",
@@ -4462,25 +4487,8 @@ void process_cpuid()
family += (fms >> 20) & 0xff;
if (family >= 6)
model += ((fms >> 16) & 0xf) << 4;
-
- if (!quiet) {
- fprintf(outf, "%d CPUID levels; family:model:stepping 0x%x:%x:%x (%d:%d:%d)\n",
- max_level, family, model, stepping, family, model, stepping);
- fprintf(outf, "CPUID(1): %s %s %s %s %s %s %s %s %s %s\n",
- ecx & (1 << 0) ? "SSE3" : "-",
- ecx & (1 << 3) ? "MONITOR" : "-",
- ecx & (1 << 6) ? "SMX" : "-",
- ecx & (1 << 7) ? "EIST" : "-",
- ecx & (1 << 8) ? "TM2" : "-",
- edx & (1 << 4) ? "TSC" : "-",
- edx & (1 << 5) ? "MSR" : "-",
- edx & (1 << 22) ? "ACPI-TM" : "-",
- edx & (1 << 28) ? "HT" : "-",
- edx & (1 << 29) ? "TM" : "-");
- }
-
- if (!(edx & (1 << 5)))
- errx(1, "CPUID: no MSR");
+ ecx_flags = ecx;
+ edx_flags = edx;

/*
* check max extended function levels of CPUID.
@@ -4490,6 +4498,25 @@ void process_cpuid()
ebx = ecx = edx = 0;
__cpuid(0x80000000, max_extended_level, ebx, ecx, edx);

+ if (!quiet) {
+ fprintf(outf, "0x%x CPUID levels; 0x%x xlevels; family:model:stepping 0x%x:%x:%x (%d:%d:%d)\n",
+ max_level, max_extended_level, family, model, stepping, family, model, stepping);
+ fprintf(outf, "CPUID(1): %s %s %s %s %s %s %s %s %s %s\n",
+ ecx_flags & (1 << 0) ? "SSE3" : "-",
+ ecx_flags & (1 << 3) ? "MONITOR" : "-",
+ ecx_flags & (1 << 6) ? "SMX" : "-",
+ ecx_flags & (1 << 7) ? "EIST" : "-",
+ ecx_flags & (1 << 8) ? "TM2" : "-",
+ edx_flags & (1 << 4) ? "TSC" : "-",
+ edx_flags & (1 << 5) ? "MSR" : "-",
+ edx_flags & (1 << 22) ? "ACPI-TM" : "-",
+ edx_flags & (1 << 28) ? "HT" : "-",
+ edx_flags & (1 << 29) ? "TM" : "-");
+ }
+
+ if (!(edx_flags & (1 << 5)))
+ errx(1, "CPUID: no MSR");
+
if (max_extended_level >= 0x80000007) {

/*
--
2.20.1