From fb7791e213a64495ec2336869b868fcd8af14346 Mon Sep 17 00:00:00 2001
From: Ivan Babrou <ivan@cloudflare.com>
Date: Mon, 4 Jan 2021 15:57:18 -0800
Subject: [PATCH 1/9] cpupower: add Makefile dependencies for install targets

This allows building cpupower in parallel rather than serially.

Signed-off-by: Ivan Babrou <ivan@cloudflare.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
---
 tools/power/cpupower/Makefile       | 8 ++++----
 tools/power/cpupower/bench/Makefile | 2 +-
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/tools/power/cpupower/Makefile b/tools/power/cpupower/Makefile
index c7bcddbd486d..3b1594447f29 100644
--- a/tools/power/cpupower/Makefile
+++ b/tools/power/cpupower/Makefile
@@ -270,14 +270,14 @@ clean:
 	$(MAKE) -C bench O=$(OUTPUT) clean
 
 
-install-lib:
+install-lib: libcpupower
 	$(INSTALL) -d $(DESTDIR)${libdir}
 	$(CP) $(OUTPUT)libcpupower.so* $(DESTDIR)${libdir}/
 	$(INSTALL) -d $(DESTDIR)${includedir}
 	$(INSTALL_DATA) lib/cpufreq.h $(DESTDIR)${includedir}/cpufreq.h
 	$(INSTALL_DATA) lib/cpuidle.h $(DESTDIR)${includedir}/cpuidle.h
 
-install-tools:
+install-tools: $(OUTPUT)cpupower
 	$(INSTALL) -d $(DESTDIR)${bindir}
 	$(INSTALL_PROGRAM) $(OUTPUT)cpupower $(DESTDIR)${bindir}
 	$(INSTALL) -d $(DESTDIR)${bash_completion_dir}
@@ -293,14 +293,14 @@ install-man:
 	$(INSTALL_DATA) -D man/cpupower-info.1 $(DESTDIR)${mandir}/man1/cpupower-info.1
 	$(INSTALL_DATA) -D man/cpupower-monitor.1 $(DESTDIR)${mandir}/man1/cpupower-monitor.1
 
-install-gmo:
+install-gmo: create-gmo
 	$(INSTALL) -d $(DESTDIR)${localedir}
 	for HLANG in $(LANGUAGES); do \
 		echo '$(INSTALL_DATA) -D $(OUTPUT)po/$$HLANG.gmo $(DESTDIR)${localedir}/$$HLANG/LC_MESSAGES/cpupower.mo'; \
 		$(INSTALL_DATA) -D $(OUTPUT)po/$$HLANG.gmo $(DESTDIR)${localedir}/$$HLANG/LC_MESSAGES/cpupower.mo; \
 	done;
 
-install-bench:
+install-bench: compile-bench
 	@#DESTDIR must be set from outside to survive
 	@sbindir=$(sbindir) bindir=$(bindir) docdir=$(docdir) confdir=$(confdir) $(MAKE) -C bench O=$(OUTPUT) install
 
diff --git a/tools/power/cpupower/bench/Makefile b/tools/power/cpupower/bench/Makefile
index f68b4bc55273..d9d9923af85c 100644
--- a/tools/power/cpupower/bench/Makefile
+++ b/tools/power/cpupower/bench/Makefile
@@ -27,7 +27,7 @@ $(OUTPUT)cpufreq-bench: $(OBJS)
 
 all: $(OUTPUT)cpufreq-bench
 
-install:
+install: $(OUTPUT)cpufreq-bench
 	mkdir -p $(DESTDIR)/$(sbindir)
 	mkdir -p $(DESTDIR)/$(bindir)
 	mkdir -p $(DESTDIR)/$(docdir)

From 629d512d682de2259179046e2364f1f1ff4232e3 Mon Sep 17 00:00:00 2001
From: Nathan Fontenot <nathan.fontenot@amd.com>
Date: Mon, 25 Jan 2021 11:34:36 -0600
Subject: [PATCH 2/9] cpupower: Update msr_pstate union struct naming

The msr_pstate union struct named fam17h_bits is misleading since
this is the struct to use for all families >= 0x17, not just
for family 0x17. Rename the bits structs to be 'pstate' (for pre
family 17h CPUs) and 'pstatedef' (for CPUs since fam 17h) to align
closer with PPR/BDKG (1) naming.

There are no functional changes as part of this update.

1: AMD Processor Programming Reference (PPR) and BIOS and
Kernel Developer's Guide (BKDG) available at:
http://developer.amd.com/resources/developer-guides-manuals

Signed-off-by: Nathan Fontenot <nathan.fontenot@amd.com>
Reviewed-by: Robert Richter <rrichter@amd.com>
Reviewed-by: skhan@linuxfoundation.org
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
---
 tools/power/cpupower/utils/helpers/amd.c | 26 +++++++++++++-----------
 1 file changed, 14 insertions(+), 12 deletions(-)

diff --git a/tools/power/cpupower/utils/helpers/amd.c b/tools/power/cpupower/utils/helpers/amd.c
index 7c4f83a8c973..34368436bbd6 100644
--- a/tools/power/cpupower/utils/helpers/amd.c
+++ b/tools/power/cpupower/utils/helpers/amd.c
@@ -13,7 +13,8 @@
 #define MSR_AMD_PSTATE		0xc0010064
 #define MSR_AMD_PSTATE_LIMIT	0xc0010061
 
-union msr_pstate {
+union core_pstate {
+	/* pre fam 17h: */
 	struct {
 		unsigned fid:6;
 		unsigned did:3;
@@ -26,7 +27,8 @@ union msr_pstate {
 		unsigned idddiv:2;
 		unsigned res3:21;
 		unsigned en:1;
-	} bits;
+	} pstate;
+	/* since fam 17h: */
 	struct {
 		unsigned fid:8;
 		unsigned did:6;
@@ -35,36 +37,36 @@ union msr_pstate {
 		unsigned idddiv:2;
 		unsigned res1:31;
 		unsigned en:1;
-	} fam17h_bits;
+	} pstatedef;
 	unsigned long long val;
 };
 
-static int get_did(int family, union msr_pstate pstate)
+static int get_did(int family, union core_pstate pstate)
 {
 	int t;
 
 	if (family == 0x12)
 		t = pstate.val & 0xf;
 	else if (family == 0x17 || family == 0x18)
-		t = pstate.fam17h_bits.did;
+		t = pstate.pstatedef.did;
 	else
-		t = pstate.bits.did;
+		t = pstate.pstate.did;
 
 	return t;
 }
 
-static int get_cof(int family, union msr_pstate pstate)
+static int get_cof(int family, union core_pstate pstate)
 {
 	int t;
 	int fid, did, cof;
 
 	did = get_did(family, pstate);
 	if (family == 0x17 || family == 0x18) {
-		fid = pstate.fam17h_bits.fid;
+		fid = pstate.pstatedef.fid;
 		cof = 200 * fid / did;
 	} else {
 		t = 0x10;
-		fid = pstate.bits.fid;
+		fid = pstate.pstate.fid;
 		if (family == 0x11)
 			t = 0x8;
 		cof = (100 * (fid + t)) >> did;
@@ -89,7 +91,7 @@ int decode_pstates(unsigned int cpu, unsigned int cpu_family,
 		   int boost_states, unsigned long *pstates, int *no)
 {
 	int i, psmax, pscur;
-	union msr_pstate pstate;
+	union core_pstate pstate;
 	unsigned long long val;
 
 	/* Only read out frequencies from HW when CPU might be boostable
@@ -119,9 +121,9 @@ int decode_pstates(unsigned int cpu, unsigned int cpu_family,
 		}
 		if (read_msr(cpu, MSR_AMD_PSTATE + i, &pstate.val))
 			return -1;
-		if ((cpu_family == 0x17) && (!pstate.fam17h_bits.en))
+		if ((cpu_family == 0x17) && (!pstate.pstatedef.en))
 			continue;
-		else if (!pstate.bits.en)
+		else if (!pstate.pstate.en)
 			continue;
 
 		pstates[i] = get_cof(cpu_family, pstate);

From 7a136a8fcd7ef14c63d07667e81c4dcac77e0a13 Mon Sep 17 00:00:00 2001
From: Robert Richter <rrichter@amd.com>
Date: Mon, 25 Jan 2021 11:34:42 -0600
Subject: [PATCH 3/9] cpupower: Correct macro name for CPB caps flag

The name is Core Performance Boost (CPB) for the cpuid flag. Correct
cpuid caps flag to use this name (instead of CBP).

Signed-off-by: Robert Richter <rrichter@amd.com>
Signed-off-by: Nathan Fontenot <nathan.fontenot@amd.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
---
 tools/power/cpupower/utils/helpers/cpuid.c   | 2 +-
 tools/power/cpupower/utils/helpers/helpers.h | 2 +-
 tools/power/cpupower/utils/helpers/misc.c    | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/power/cpupower/utils/helpers/cpuid.c b/tools/power/cpupower/utils/helpers/cpuid.c
index 73bfafc60e9b..f9a66a430b72 100644
--- a/tools/power/cpupower/utils/helpers/cpuid.c
+++ b/tools/power/cpupower/utils/helpers/cpuid.c
@@ -130,7 +130,7 @@ out:
 	    cpu_info->vendor == X86_VENDOR_HYGON) {
 		if (ext_cpuid_level >= 0x80000007 &&
 		    (cpuid_edx(0x80000007) & (1 << 9)))
-			cpu_info->caps |= CPUPOWER_CAP_AMD_CBP;
+			cpu_info->caps |= CPUPOWER_CAP_AMD_CPB;
 
 		if (ext_cpuid_level >= 0x80000008 &&
 		    cpuid_ebx(0x80000008) & (1 << 4))
diff --git a/tools/power/cpupower/utils/helpers/helpers.h b/tools/power/cpupower/utils/helpers/helpers.h
index 0642e60a6ce1..a84f85a9dbd2 100644
--- a/tools/power/cpupower/utils/helpers/helpers.h
+++ b/tools/power/cpupower/utils/helpers/helpers.h
@@ -64,7 +64,7 @@ enum cpupower_cpu_vendor {X86_VENDOR_UNKNOWN = 0, X86_VENDOR_INTEL,
 
 #define CPUPOWER_CAP_INV_TSC		0x00000001
 #define CPUPOWER_CAP_APERF		0x00000002
-#define CPUPOWER_CAP_AMD_CBP		0x00000004
+#define CPUPOWER_CAP_AMD_CPB		0x00000004
 #define CPUPOWER_CAP_PERF_BIAS		0x00000008
 #define CPUPOWER_CAP_HAS_TURBO_RATIO	0x00000010
 #define CPUPOWER_CAP_IS_SNB		0x00000020
diff --git a/tools/power/cpupower/utils/helpers/misc.c b/tools/power/cpupower/utils/helpers/misc.c
index 650b9a9a6584..f9bcce9c72d5 100644
--- a/tools/power/cpupower/utils/helpers/misc.c
+++ b/tools/power/cpupower/utils/helpers/misc.c
@@ -26,7 +26,7 @@ int cpufreq_has_boost_support(unsigned int cpu, int *support, int *active,
 	if (ret)
 		return ret;
 
-	if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_CBP) {
+	if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_CPB) {
 		*support = 1;
 
 		/* AMD Family 0x17 does not utilize PCI D18F4 like prior

From a0255a76bf3a78d322adfe4eb4e73eb83998f61a Mon Sep 17 00:00:00 2001
From: Nathan Fontenot <nathan.fontenot@amd.com>
Date: Mon, 25 Jan 2021 11:34:49 -0600
Subject: [PATCH 4/9] cpupower: Add CPUPOWER_CAP_AMD_HW_PSTATE cpuid caps flag

Add a check in get_cpu_info() for the ability to read frequencies
from hardware and set the CPUPOWER_CAP_AMD_HW_PSTATE cpuid flag.
The cpuid flag is set when CPUID_80000007_EDX[7] is set,
which is all families >= 10h. The check excludes family 14h
because HW pstate reporting was not implemented on family 14h.

This is intended to reduce family checks in the main code paths.

Signed-off-by: Nathan Fontenot <nathan.fontenot@amd.com>
Reviewed-by: Robert Richter <rrichter@amd.com>
Reviewed-by: skhan@linuxfoundation.org
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
---
 tools/power/cpupower/utils/helpers/amd.c     |  9 ++++-----
 tools/power/cpupower/utils/helpers/cpuid.c   | 12 +++++++++---
 tools/power/cpupower/utils/helpers/helpers.h |  1 +
 3 files changed, 14 insertions(+), 8 deletions(-)

diff --git a/tools/power/cpupower/utils/helpers/amd.c b/tools/power/cpupower/utils/helpers/amd.c
index 34368436bbd6..8b69c7ff639a 100644
--- a/tools/power/cpupower/utils/helpers/amd.c
+++ b/tools/power/cpupower/utils/helpers/amd.c
@@ -94,11 +94,10 @@ int decode_pstates(unsigned int cpu, unsigned int cpu_family,
 	union core_pstate pstate;
 	unsigned long long val;
 
-	/* Only read out frequencies from HW when CPU might be boostable
-	   to keep the code as short and clean as possible.
-	   Otherwise frequencies are exported via ACPI tables.
-	*/
-	if (cpu_family < 0x10 || cpu_family == 0x14)
+	/* Only read out frequencies from HW if HW Pstate is supported,
+	 * otherwise frequencies are exported via ACPI tables.
+	 */
+	if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_HW_PSTATE))
 		return -1;
 
 	if (read_msr(cpu, MSR_AMD_PSTATE_LIMIT, &val))
diff --git a/tools/power/cpupower/utils/helpers/cpuid.c b/tools/power/cpupower/utils/helpers/cpuid.c
index f9a66a430b72..d577220a193b 100644
--- a/tools/power/cpupower/utils/helpers/cpuid.c
+++ b/tools/power/cpupower/utils/helpers/cpuid.c
@@ -128,9 +128,15 @@ out:
 	/* AMD or Hygon Boost state enable/disable register */
 	if (cpu_info->vendor == X86_VENDOR_AMD ||
 	    cpu_info->vendor == X86_VENDOR_HYGON) {
-		if (ext_cpuid_level >= 0x80000007 &&
-		    (cpuid_edx(0x80000007) & (1 << 9)))
-			cpu_info->caps |= CPUPOWER_CAP_AMD_CPB;
+		if (ext_cpuid_level >= 0x80000007) {
+			if (cpuid_edx(0x80000007) & (1 << 9))
+				cpu_info->caps |= CPUPOWER_CAP_AMD_CPB;
+
+			if ((cpuid_edx(0x80000007) & (1 << 7)) &&
+			    cpu_info->family != 0x14)
+				/* HW pstate was not implemented in family 0x14 */
+				cpu_info->caps |= CPUPOWER_CAP_AMD_HW_PSTATE;
+		}
 
 		if (ext_cpuid_level >= 0x80000008 &&
 		    cpuid_ebx(0x80000008) & (1 << 4))
diff --git a/tools/power/cpupower/utils/helpers/helpers.h b/tools/power/cpupower/utils/helpers/helpers.h
index a84f85a9dbd2..5f61eefff5b2 100644
--- a/tools/power/cpupower/utils/helpers/helpers.h
+++ b/tools/power/cpupower/utils/helpers/helpers.h
@@ -70,6 +70,7 @@ enum cpupower_cpu_vendor {X86_VENDOR_UNKNOWN = 0, X86_VENDOR_INTEL,
 #define CPUPOWER_CAP_IS_SNB		0x00000020
 #define CPUPOWER_CAP_INTEL_IDA		0x00000040
 #define CPUPOWER_CAP_AMD_RDPRU		0x00000080
+#define CPUPOWER_CAP_AMD_HW_PSTATE	0x00000100
 
 #define CPUPOWER_AMD_CPBDIS		0x02000000
 

From 1421de7919cd082bad692626937f055f367586ba Mon Sep 17 00:00:00 2001
From: Nathan Fontenot <nathan.fontenot@amd.com>
Date: Mon, 25 Jan 2021 11:35:10 -0600
Subject: [PATCH 5/9] cpupower: Remove unused pscur variable.

The pscur variable is set but not uused, just remove it.

This may have previsously been set to validate the MSR_AMD_PSTATE_STATUS
MSR. With the addition of the CPUPOWER_CAP_AMD_HW_PSTATE cap flag this
is no longer needed since the cpuid bit to enable this cap flag also
validates that the MSR_AMD_PSTATE_STATUS MSR is present.

Signed-off-by: Nathan Fontenot <nathan.fontenot@amd.com>
Reviewed-by: Robert Richter <rrichter@amd.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
---
 tools/power/cpupower/utils/helpers/amd.c | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/tools/power/cpupower/utils/helpers/amd.c b/tools/power/cpupower/utils/helpers/amd.c
index 8b69c7ff639a..fc2ac1e6bfb2 100644
--- a/tools/power/cpupower/utils/helpers/amd.c
+++ b/tools/power/cpupower/utils/helpers/amd.c
@@ -90,7 +90,7 @@ static int get_cof(int family, union core_pstate pstate)
 int decode_pstates(unsigned int cpu, unsigned int cpu_family,
 		   int boost_states, unsigned long *pstates, int *no)
 {
-	int i, psmax, pscur;
+	int i, psmax;
 	union core_pstate pstate;
 	unsigned long long val;
 
@@ -104,13 +104,6 @@ int decode_pstates(unsigned int cpu, unsigned int cpu_family,
 		return -1;
 
 	psmax = (val >> 4) & 0x7;
-
-	if (read_msr(cpu, MSR_AMD_PSTATE_STATUS, &val))
-		return -1;
-
-	pscur = val & 0x7;
-
-	pscur += boost_states;
 	psmax += boost_states;
 	for (i = 0; i <= psmax; i++) {
 		if (i >= MAX_HW_PSTATES) {

From 23765b82a808da416b70b41d711468e723531e6a Mon Sep 17 00:00:00 2001
From: Nathan Fontenot <nathan.fontenot@amd.com>
Date: Mon, 25 Jan 2021 11:35:17 -0600
Subject: [PATCH 6/9] cpupower: Update family checks when decoding HW pstates

The family checks in get_cof() and get_did() need to use the
correct MSR format depending on the family. Add a cpupower
capability for using the pstatedef (family 17h and newer) to
control this instead of direct family checks.

Signed-off-by: Nathan Fontenot <nathan.fontenot@amd.com>
Reviewed-by: Robert Richter <rrichter@amd.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
---
 tools/power/cpupower/utils/helpers/amd.c     | 8 ++++----
 tools/power/cpupower/utils/helpers/cpuid.c   | 6 +++++-
 tools/power/cpupower/utils/helpers/helpers.h | 1 +
 3 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/tools/power/cpupower/utils/helpers/amd.c b/tools/power/cpupower/utils/helpers/amd.c
index fc2ac1e6bfb2..b4731daa6820 100644
--- a/tools/power/cpupower/utils/helpers/amd.c
+++ b/tools/power/cpupower/utils/helpers/amd.c
@@ -45,10 +45,10 @@ static int get_did(int family, union core_pstate pstate)
 {
 	int t;
 
-	if (family == 0x12)
-		t = pstate.val & 0xf;
-	else if (family == 0x17 || family == 0x18)
+	if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_PSTATEDEF)
 		t = pstate.pstatedef.did;
+	else if (family == 0x12)
+		t = pstate.val & 0xf;
 	else
 		t = pstate.pstate.did;
 
@@ -61,7 +61,7 @@ static int get_cof(int family, union core_pstate pstate)
 	int fid, did, cof;
 
 	did = get_did(family, pstate);
-	if (family == 0x17 || family == 0x18) {
+	if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_PSTATEDEF) {
 		fid = pstate.pstatedef.fid;
 		cof = 200 * fid / did;
 	} else {
diff --git a/tools/power/cpupower/utils/helpers/cpuid.c b/tools/power/cpupower/utils/helpers/cpuid.c
index d577220a193b..db2e88ceb67b 100644
--- a/tools/power/cpupower/utils/helpers/cpuid.c
+++ b/tools/power/cpupower/utils/helpers/cpuid.c
@@ -133,9 +133,13 @@ out:
 				cpu_info->caps |= CPUPOWER_CAP_AMD_CPB;
 
 			if ((cpuid_edx(0x80000007) & (1 << 7)) &&
-			    cpu_info->family != 0x14)
+			    cpu_info->family != 0x14) {
 				/* HW pstate was not implemented in family 0x14 */
 				cpu_info->caps |= CPUPOWER_CAP_AMD_HW_PSTATE;
+
+				if (cpu_info->family >= 0x17)
+					cpu_info->caps |= CPUPOWER_CAP_AMD_PSTATEDEF;
+			}
 		}
 
 		if (ext_cpuid_level >= 0x80000008 &&
diff --git a/tools/power/cpupower/utils/helpers/helpers.h b/tools/power/cpupower/utils/helpers/helpers.h
index 5f61eefff5b2..e4dc44ced770 100644
--- a/tools/power/cpupower/utils/helpers/helpers.h
+++ b/tools/power/cpupower/utils/helpers/helpers.h
@@ -71,6 +71,7 @@ enum cpupower_cpu_vendor {X86_VENDOR_UNKNOWN = 0, X86_VENDOR_INTEL,
 #define CPUPOWER_CAP_INTEL_IDA		0x00000040
 #define CPUPOWER_CAP_AMD_RDPRU		0x00000080
 #define CPUPOWER_CAP_AMD_HW_PSTATE	0x00000100
+#define CPUPOWER_CAP_AMD_PSTATEDEF	0x00000200
 
 #define CPUPOWER_AMD_CPBDIS		0x02000000
 

From 56a85eebebdba62ebf6c46bd957949cc6e926aa0 Mon Sep 17 00:00:00 2001
From: Nathan Fontenot <nathan.fontenot@amd.com>
Date: Mon, 25 Jan 2021 11:35:23 -0600
Subject: [PATCH 7/9] cpupower: Condense pstate enabled bit checks in
 decode_pstates()

The enabled bit (bit 63) is common for all families so we can remove
the multiple enabled checks based on family and have a common check
for HW pstate enabled.

Signed-off-by: Nathan Fontenot <nathan.fontenot@amd.com>
Reviewed-by: Robert Richter <rrichter@amd.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
---
 tools/power/cpupower/utils/helpers/amd.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/power/cpupower/utils/helpers/amd.c b/tools/power/cpupower/utils/helpers/amd.c
index b4731daa6820..216240e2b771 100644
--- a/tools/power/cpupower/utils/helpers/amd.c
+++ b/tools/power/cpupower/utils/helpers/amd.c
@@ -113,9 +113,9 @@ int decode_pstates(unsigned int cpu, unsigned int cpu_family,
 		}
 		if (read_msr(cpu, MSR_AMD_PSTATE + i, &pstate.val))
 			return -1;
-		if ((cpu_family == 0x17) && (!pstate.pstatedef.en))
-			continue;
-		else if (!pstate.pstate.en)
+
+		/* The enabled bit (bit 63) is common for all families */
+		if (!pstate.pstatedef.en)
 			continue;
 
 		pstates[i] = get_cof(cpu_family, pstate);

From d1abc4e996d7784ce4d56749e4b5ca8ff23b1e0f Mon Sep 17 00:00:00 2001
From: Nathan Fontenot <nathan.fontenot@amd.com>
Date: Mon, 25 Jan 2021 11:36:01 -0600
Subject: [PATCH 8/9] cpupower: Remove family arg to decode_pstates()

The decode_pstates() routine no longer uses the CPU family and
the caleed routines (get_cof() and get_did()) can grab the family
from the global cpupower_cpu_info struct. These update removes
passing the family arg to all these routines.

Signed-off-by: Nathan Fontenot <nathan.fontenot@amd.com>
Reviewed-by: Robert Richter <rrichter@amd.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
---
 tools/power/cpupower/utils/cpufreq-info.c    |  3 +--
 tools/power/cpupower/utils/helpers/amd.c     | 19 +++++++++----------
 tools/power/cpupower/utils/helpers/helpers.h |  9 ++++-----
 3 files changed, 14 insertions(+), 17 deletions(-)

diff --git a/tools/power/cpupower/utils/cpufreq-info.c b/tools/power/cpupower/utils/cpufreq-info.c
index 6efc0f6b1b11..f9895e31ff5a 100644
--- a/tools/power/cpupower/utils/cpufreq-info.c
+++ b/tools/power/cpupower/utils/cpufreq-info.c
@@ -186,8 +186,7 @@ static int get_boost_mode_x86(unsigned int cpu)
 	if ((cpupower_cpu_info.vendor == X86_VENDOR_AMD &&
 	     cpupower_cpu_info.family >= 0x10) ||
 	     cpupower_cpu_info.vendor == X86_VENDOR_HYGON) {
-		ret = decode_pstates(cpu, cpupower_cpu_info.family, b_states,
-				     pstates, &pstate_no);
+		ret = decode_pstates(cpu, b_states, pstates, &pstate_no);
 		if (ret)
 			return ret;
 
diff --git a/tools/power/cpupower/utils/helpers/amd.c b/tools/power/cpupower/utils/helpers/amd.c
index 216240e2b771..97f2c857048e 100644
--- a/tools/power/cpupower/utils/helpers/amd.c
+++ b/tools/power/cpupower/utils/helpers/amd.c
@@ -41,13 +41,13 @@ union core_pstate {
 	unsigned long long val;
 };
 
-static int get_did(int family, union core_pstate pstate)
+static int get_did(union core_pstate pstate)
 {
 	int t;
 
 	if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_PSTATEDEF)
 		t = pstate.pstatedef.did;
-	else if (family == 0x12)
+	else if (cpupower_cpu_info.family == 0x12)
 		t = pstate.val & 0xf;
 	else
 		t = pstate.pstate.did;
@@ -55,19 +55,19 @@ static int get_did(int family, union core_pstate pstate)
 	return t;
 }
 
-static int get_cof(int family, union core_pstate pstate)
+static int get_cof(union core_pstate pstate)
 {
 	int t;
 	int fid, did, cof;
 
-	did = get_did(family, pstate);
+	did = get_did(pstate);
 	if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_PSTATEDEF) {
 		fid = pstate.pstatedef.fid;
 		cof = 200 * fid / did;
 	} else {
 		t = 0x10;
 		fid = pstate.pstate.fid;
-		if (family == 0x11)
+		if (cpupower_cpu_info.family == 0x11)
 			t = 0x8;
 		cof = (100 * (fid + t)) >> did;
 	}
@@ -76,8 +76,7 @@ static int get_cof(int family, union core_pstate pstate)
 
 /* Needs:
  * cpu          -> the cpu that gets evaluated
- * cpu_family   -> The cpu's family (0x10, 0x12,...)
- * boots_states -> how much boost states the machines support
+ * boost_states -> how much boost states the machines support
  *
  * Fills up:
  * pstates -> a pointer to an array of size MAX_HW_PSTATES
@@ -87,8 +86,8 @@ static int get_cof(int family, union core_pstate pstate)
  *
  * returns zero on success, -1 on failure
  */
-int decode_pstates(unsigned int cpu, unsigned int cpu_family,
-		   int boost_states, unsigned long *pstates, int *no)
+int decode_pstates(unsigned int cpu, int boost_states,
+		   unsigned long *pstates, int *no)
 {
 	int i, psmax;
 	union core_pstate pstate;
@@ -118,7 +117,7 @@ int decode_pstates(unsigned int cpu, unsigned int cpu_family,
 		if (!pstate.pstatedef.en)
 			continue;
 
-		pstates[i] = get_cof(cpu_family, pstate);
+		pstates[i] = get_cof(pstate);
 	}
 	*no = i;
 	return 0;
diff --git a/tools/power/cpupower/utils/helpers/helpers.h b/tools/power/cpupower/utils/helpers/helpers.h
index e4dc44ced770..8a0c11c6ec63 100644
--- a/tools/power/cpupower/utils/helpers/helpers.h
+++ b/tools/power/cpupower/utils/helpers/helpers.h
@@ -127,8 +127,8 @@ extern struct pci_dev *pci_slot_func_init(struct pci_access **pacc,
 
 /* AMD HW pstate decoding **************************/
 
-extern int decode_pstates(unsigned int cpu, unsigned int cpu_family,
-			  int boost_states, unsigned long *pstates, int *no);
+extern int decode_pstates(unsigned int cpu, int boost_states,
+			  unsigned long *pstates, int *no);
 
 /* AMD HW pstate decoding **************************/
 
@@ -145,9 +145,8 @@ unsigned int cpuid_edx(unsigned int op);
 /* cpuid and cpuinfo helpers  **************************/
 /* X86 ONLY ********************************************/
 #else
-static inline int decode_pstates(unsigned int cpu, unsigned int cpu_family,
-				 int boost_states, unsigned long *pstates,
-				 int *no)
+static inline int decode_pstates(unsigned int cpu, int boost_states,
+				 unsigned long *pstates, int *no)
 { return -1; };
 
 static inline int read_msr(int cpu, unsigned int idx, unsigned long long *val)

From 3a3ecfdb605cc8d98988012a4f88c34b4d220c21 Mon Sep 17 00:00:00 2001
From: Nathan Fontenot <nathan.fontenot@amd.com>
Date: Mon, 25 Jan 2021 11:36:23 -0600
Subject: [PATCH 9/9] cpupower: Add cpuid cap flag for MSR_AMD_HWCR support

Remove the family check for accessing the MSR_AMD_HWCR MSR and replace
it with a cpupower cap flag.

This update also allows for the removal of the local cpupower_cpu_info
variable in cpufreq_has_boost_support() since we no longer need it to
check the family.

Signed-off-by: Nathan Fontenot <nathan.fontenot@amd.com>
Reviewed-by: Robert Richter <rrichter@amd.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
---
 tools/power/cpupower/utils/helpers/cpuid.c   | 6 +++++-
 tools/power/cpupower/utils/helpers/helpers.h | 1 +
 tools/power/cpupower/utils/helpers/misc.c    | 7 +------
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/tools/power/cpupower/utils/helpers/cpuid.c b/tools/power/cpupower/utils/helpers/cpuid.c
index db2e88ceb67b..72eb43593180 100644
--- a/tools/power/cpupower/utils/helpers/cpuid.c
+++ b/tools/power/cpupower/utils/helpers/cpuid.c
@@ -129,9 +129,13 @@ out:
 	if (cpu_info->vendor == X86_VENDOR_AMD ||
 	    cpu_info->vendor == X86_VENDOR_HYGON) {
 		if (ext_cpuid_level >= 0x80000007) {
-			if (cpuid_edx(0x80000007) & (1 << 9))
+			if (cpuid_edx(0x80000007) & (1 << 9)) {
 				cpu_info->caps |= CPUPOWER_CAP_AMD_CPB;
 
+				if (cpu_info->family >= 0x17)
+					cpu_info->caps |= CPUPOWER_CAP_AMD_CPB_MSR;
+			}
+
 			if ((cpuid_edx(0x80000007) & (1 << 7)) &&
 			    cpu_info->family != 0x14) {
 				/* HW pstate was not implemented in family 0x14 */
diff --git a/tools/power/cpupower/utils/helpers/helpers.h b/tools/power/cpupower/utils/helpers/helpers.h
index 8a0c11c6ec63..33ffacee7fcb 100644
--- a/tools/power/cpupower/utils/helpers/helpers.h
+++ b/tools/power/cpupower/utils/helpers/helpers.h
@@ -72,6 +72,7 @@ enum cpupower_cpu_vendor {X86_VENDOR_UNKNOWN = 0, X86_VENDOR_INTEL,
 #define CPUPOWER_CAP_AMD_RDPRU		0x00000080
 #define CPUPOWER_CAP_AMD_HW_PSTATE	0x00000100
 #define CPUPOWER_CAP_AMD_PSTATEDEF	0x00000200
+#define CPUPOWER_CAP_AMD_CPB_MSR	0x00000400
 
 #define CPUPOWER_AMD_CPBDIS		0x02000000
 
diff --git a/tools/power/cpupower/utils/helpers/misc.c b/tools/power/cpupower/utils/helpers/misc.c
index f9bcce9c72d5..fc6e34511721 100644
--- a/tools/power/cpupower/utils/helpers/misc.c
+++ b/tools/power/cpupower/utils/helpers/misc.c
@@ -16,16 +16,11 @@
 int cpufreq_has_boost_support(unsigned int cpu, int *support, int *active,
 			int *states)
 {
-	struct cpupower_cpu_info cpu_info;
 	int ret;
 	unsigned long long val;
 
 	*support = *active = *states = 0;
 
-	ret = get_cpu_info(&cpu_info);
-	if (ret)
-		return ret;
-
 	if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_CPB) {
 		*support = 1;
 
@@ -34,7 +29,7 @@ int cpufreq_has_boost_support(unsigned int cpu, int *support, int *active,
 		 * has Hardware determined variable increments instead.
 		 */
 
-		if (cpu_info.family == 0x17 || cpu_info.family == 0x18) {
+		if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_CPB_MSR) {
 			if (!read_msr(cpu, MSR_AMD_HWCR, &val)) {
 				if (!(val & CPUPOWER_AMD_CPBDIS))
 					*active = 1;