Add initial support for powerpc64le initialization.

    * Adds header definitions for PPC64le
    * Adds support to construct the processor, core, cluster, package
      and cache(L1i,L1d,L2 and L3) information reported by the system.

    Test: Build and ran cpu_info on PPC64le linux machine. confirmed
          that it properly reports the logical processors, cores, clusters,
          packages and cache information.

CMakeLists.txt

@@ -95,7 +95,7 @@ IF(NOT CMAKE_SYSTEM_PROCESSOR)
       "cpuinfo will compile, but cpuinfo_initialize() will always fail.")
     SET(CPUINFO_SUPPORTED_PLATFORM FALSE)
   ENDIF()
-ELSEIF(NOT CPUINFO_TARGET_PROCESSOR MATCHES "^(i[3-6]86|AMD64|x86(_64)?|armv[5-8].*|aarch64|arm64.*|ARM64.*|riscv(32|64))$")
+ELSEIF(NOT CPUINFO_TARGET_PROCESSOR MATCHES "^(i[3-6]86|AMD64|x86(_64)?|armv[5-8].*|aarch64|arm64.*|ARM64.*|riscv(32|64)|ppc64le)$")
   MESSAGE(WARNING
     "Target processor architecture \"${CPUINFO_TARGET_PROCESSOR}\" is not supported in cpuinfo. "
     "cpuinfo will compile, but cpuinfo_initialize() will always fail.")
@@ -184,6 +184,14 @@ IF(CPUINFO_SUPPORTED_PLATFORM)
     ELSEIF(CMAKE_SYSTEM_NAME STREQUAL "FreeBSD")
       LIST(APPEND CPUINFO_SRCS src/x86/freebsd/init.c)
     ENDIF()
+  ELSEIF(CMAKE_SYSTEM_PROCESSOR MATCHES "^(ppc64le)$" )
+    LIST(APPEND CPUINFO_SRCS
+      src/powerpc/uarch.c
+      src/powerpc/cache.c
+      src/powerpc/linux/cpuinfo.c
+      src/powerpc/linux/ppc64-hw.c
+      src/powerpc/linux/init.c
+      src/powerpc/linux/ppc64-isa.c)
   ELSEIF(CMAKE_SYSTEM_NAME MATCHES "^Windows" AND CPUINFO_TARGET_PROCESSOR MATCHES "^(ARM64|arm64)$")
     LIST(APPEND CPUINFO_SRCS
       src/arm/windows/init-by-logical-sys-info.c
@@ -856,6 +864,14 @@ IF(CPUINFO_SUPPORTED_PLATFORM AND CPUINFO_BUILD_UNIT_TESTS)
     TARGET_LINK_LIBRARIES(cache-test PRIVATE cpuinfo_internals gtest gtest_main)
     ADD_TEST(NAME cache-test COMMAND cache-test)
   ENDIF()
+
+  IF(CMAKE_SYSTEM_NAME STREQUAL "POWER" OR CMAKE_SYSTEM_PROCESSOR MATCHES "^(ppc64le)$")
+    ADD_EXECUTABLE(power-features-test test/name/power-features.cc)
+    CPUINFO_TARGET_ENABLE_CXX11(power-features-test)
+    CPUINFO_TARGET_RUNTIME_LIBRARY(power-features-test)
+    TARGET_LINK_LIBRARIES(power-features-test PRIVATE cpuinfo_internals gtest gtest_main)
+    ADD_TEST(NAME power-features-test COMMAND power-features-test)
+  ENDIF()
 ENDIF()
 
 # ---[ Helper and debug tools

configure.py

@@ -75,6 +75,16 @@ def main(args):
             if options.mock:
                 sources += ["linux/mockfile.c"]
         build.static_library("cpuinfo", map(build.cc, sources))
+        if build.target.is_ppc64:
+            sources += [ "powerpc/uarch.c", "powerpc/cache.c"]
+            if build.target.is_linux:
+                sources += [
+                    "powerpc/linux/cpuinfo.c"
+                    "powerpc/linux/ppc64-hw.c",
+                    "powerpc/linux/init.c",
+                    "powerpc/linux/ppc64-isa.c",
+                    ]
+
 
     with build.options(source_dir="tools", deps=[build, build.deps.clog]):
         build.executable("cpu-info", build.cc("cpu-info.c"))
@@ -91,6 +101,8 @@ def main(args):
             build.smoketest("get-current-test", build.cxx("get-current.cc"))
         if build.target.is_x86_64:
             build.smoketest("brand-string-test", build.cxx("name/brand-string.cc"))
+        if build.target.is_ppc64:
+            build.smoketest("power-features-test", build.cxx("name/power-features.cc"))
     if options.mock:
         with build.options(source_dir="test", include_dirs="test", macros="CPUINFO_MOCK", deps=[build, build.deps.googletest]):
             if build.target.is_arm64 and build.target.is_linux:

include/cpuinfo.h

@@ -601,6 +601,21 @@ enum cpuinfo_uarch {
 
 	/** HiSilicon TaiShan v110 (Huawei Kunpeng 920 series processors). */
 	cpuinfo_uarch_taishan_v110 = 0x00C00100,
+
+	/** IBM POWER 7. */
+	cpuinfo_uarch_power7    = 0x00D00100,
+	/** IBM POWER 7p. */
+	cpuinfo_uarch_power7p   = 0x00D00101,
+	/** IBM POWER 8. */
+	cpuinfo_uarch_power8    = 0x00D00200,
+	/** IBM POWER8E. */
+	cpuinfo_uarch_power8e   = 0x00D00201,
+	/** IBM POWER8NVL */
+	cpuinfo_uarch_power8nvl = 0x00D00202,
+	/** IBM POWER 9. */
+	cpuinfo_uarch_power9    = 0x00D00303,
+	/** IBM POWER 10. */
+	cpuinfo_uarch_power10   = 0x00D00400,
 };
 
 struct cpuinfo_processor {
@@ -671,9 +686,14 @@ struct cpuinfo_core {
 #elif CPUINFO_ARCH_ARM || CPUINFO_ARCH_ARM64
 	/** Value of Main ID Register (MIDR) for this core */
 	uint32_t midr;
+#elif CPUINFO_ARCH_PPC64
+	/** Value of Processor Version Register for this core */
+	uint32_t pvr;
 #endif
 	/** Clock rate (non-Turbo) of the core, in Hz */
 	uint64_t frequency;
+
+	bool disabled;
 };
 
 struct cpuinfo_cluster {
@@ -699,6 +719,9 @@ struct cpuinfo_cluster {
 #elif CPUINFO_ARCH_ARM || CPUINFO_ARCH_ARM64
 	/** Value of Main ID Register (MIDR) of the cores in the cluster */
 	uint32_t midr;
+#elif CPUINFO_ARCH_PPC64
+	/** Value of Processor Version Register in this cluster */
+	uint32_t pvr;
 #endif
 	/** Clock rate (non-Turbo) of the cores in the cluster, in Hz */
 	uint64_t frequency;
@@ -732,6 +755,9 @@ struct cpuinfo_uarch_info {
 #elif CPUINFO_ARCH_ARM || CPUINFO_ARCH_ARM64
 	/** Value of Main ID Register (MIDR) for the microarchitecture */
 	uint32_t midr;
+#elif CPUINFO_ARCH_PPC64
+	/** Value of Processor Version Register for this core */
+	uint32_t pvr;
 #endif
 	/** Number of logical processors with the microarchitecture */
 	uint32_t processor_count;
@@ -2218,6 +2244,40 @@ static inline bool cpuinfo_has_riscv_v(void) {
 #endif
 }
 
+#if CPUINFO_ARCH_PPC64
+	struct cpuinfo_powerpc_isa {
+		bool vsx;
+		bool htm;
+		bool mma;
+	};
+
+	extern struct cpuinfo_powerpc_isa cpuinfo_isa;
+#endif
+
+static inline bool cpuinfo_has_powerpc_vsx(void) {
+#if CPUINFO_ARCH_PPC64
+	return cpuinfo_isa.vsx;
+#else
+	return false;
+#endif
+}
+
+static inline bool cpuinfo_has_powerpc_htm(void) {
+#if CPUINFO_ARCH_PPC64
+	return cpuinfo_isa.htm;
+#else
+	return false;
+#endif
+}
+
+static inline bool cpuinfo_has_powerpc_mma(void) {
+#if CPUINFO_ARCH_PPC64
+	return cpuinfo_isa.mma;
+#else
+	return false;
+#endif
+}
+
 const struct cpuinfo_processor* CPUINFO_ABI cpuinfo_get_processors(void);
 const struct cpuinfo_core* CPUINFO_ABI cpuinfo_get_cores(void);
 const struct cpuinfo_cluster* CPUINFO_ABI cpuinfo_get_clusters(void);

src/api.c

@@ -30,7 +30,7 @@ uint32_t cpuinfo_packages_count = 0;
 uint32_t cpuinfo_cache_count[cpuinfo_cache_level_max] = {0};
 uint32_t cpuinfo_max_cache_size = 0;
 
-#if CPUINFO_ARCH_ARM || CPUINFO_ARCH_ARM64 || CPUINFO_ARCH_RISCV32 || CPUINFO_ARCH_RISCV64
+#if CPUINFO_ARCH_ARM || CPUINFO_ARCH_ARM64 || CPUINFO_ARCH_RISCV32 || CPUINFO_ARCH_RISCV64 || CPUINFO_ARCH_PPC64
 struct cpuinfo_uarch_info* cpuinfo_uarchs = NULL;
 uint32_t cpuinfo_uarchs_count = 0;
 #else
@@ -41,7 +41,7 @@ struct cpuinfo_uarch_info cpuinfo_global_uarch = {cpuinfo_uarch_unknown};
 uint32_t cpuinfo_linux_cpu_max = 0;
 const struct cpuinfo_processor** cpuinfo_linux_cpu_to_processor_map = NULL;
 const struct cpuinfo_core** cpuinfo_linux_cpu_to_core_map = NULL;
-#if CPUINFO_ARCH_ARM || CPUINFO_ARCH_ARM64 || CPUINFO_ARCH_RISCV32 || CPUINFO_ARCH_RISCV64
+#if CPUINFO_ARCH_ARM || CPUINFO_ARCH_ARM64 || CPUINFO_ARCH_RISCV32 || CPUINFO_ARCH_RISCV64 || CPUINFO_ARCH_PPC64
 const uint32_t* cpuinfo_linux_cpu_to_uarch_index_map = NULL;
 #endif
 #endif
@@ -78,7 +78,7 @@ const struct cpuinfo_uarch_info* cpuinfo_get_uarchs() {
 	if (!cpuinfo_is_initialized) {
 		cpuinfo_log_fatal("cpuinfo_get_%s called before cpuinfo is initialized", "uarchs");
 	}
-#if CPUINFO_ARCH_ARM || CPUINFO_ARCH_ARM64 || CPUINFO_ARCH_RISCV32 || CPUINFO_ARCH_RISCV64
+#if CPUINFO_ARCH_ARM || CPUINFO_ARCH_ARM64 || CPUINFO_ARCH_RISCV32 || CPUINFO_ARCH_RISCV64 || CPUINFO_ARCH_PPC64
 	return cpuinfo_uarchs;
 #else
 	return &cpuinfo_global_uarch;
@@ -129,7 +129,7 @@ const struct cpuinfo_uarch_info* cpuinfo_get_uarch(uint32_t index) {
 	if (!cpuinfo_is_initialized) {
 		cpuinfo_log_fatal("cpuinfo_get_%s called before cpuinfo is initialized", "uarch");
 	}
-#if CPUINFO_ARCH_ARM || CPUINFO_ARCH_ARM64 || CPUINFO_ARCH_RISCV32 || CPUINFO_ARCH_RISCV64
+#if CPUINFO_ARCH_ARM || CPUINFO_ARCH_ARM64 || CPUINFO_ARCH_RISCV32 || CPUINFO_ARCH_RISCV64 || CPUINFO_ARCH_PPC64
 	if CPUINFO_UNLIKELY (index >= cpuinfo_uarchs_count) {
 		return NULL;
 	}
@@ -174,7 +174,7 @@ uint32_t cpuinfo_get_uarchs_count(void) {
 	if (!cpuinfo_is_initialized) {
 		cpuinfo_log_fatal("cpuinfo_get_%s called before cpuinfo is initialized", "uarchs_count");
 	}
-#if CPUINFO_ARCH_ARM || CPUINFO_ARCH_ARM64 || CPUINFO_ARCH_RISCV32 || CPUINFO_ARCH_RISCV64
+#if CPUINFO_ARCH_ARM || CPUINFO_ARCH_ARM64 || CPUINFO_ARCH_RISCV32 || CPUINFO_ARCH_RISCV64 || CPUINFO_ARCH_PPC64
 	return cpuinfo_uarchs_count;
 #else
 	return 1;
@@ -350,7 +350,7 @@ uint32_t CPUINFO_ABI cpuinfo_get_current_uarch_index(void) {
 	if CPUINFO_UNLIKELY (!cpuinfo_is_initialized) {
 		cpuinfo_log_fatal("cpuinfo_get_%s called before cpuinfo is initialized", "current_uarch_index");
 	}
-#if CPUINFO_ARCH_ARM || CPUINFO_ARCH_ARM64 || CPUINFO_ARCH_RISCV32 || CPUINFO_ARCH_RISCV64
+#if CPUINFO_ARCH_ARM || CPUINFO_ARCH_ARM64 || CPUINFO_ARCH_RISCV32 || CPUINFO_ARCH_RISCV64 || CPUINFO_ARCH_PPC64
 #ifdef __linux__
 	if (cpuinfo_linux_cpu_to_uarch_index_map == NULL) {
 		/* Special case: avoid syscall on systems with only a single
@@ -385,7 +385,7 @@ uint32_t CPUINFO_ABI cpuinfo_get_current_uarch_index_with_default(uint32_t defau
 		cpuinfo_log_fatal(
 			"cpuinfo_get_%s called before cpuinfo is initialized", "current_uarch_index_with_default");
 	}
-#if CPUINFO_ARCH_ARM || CPUINFO_ARCH_ARM64 || CPUINFO_ARCH_RISCV32 || CPUINFO_ARCH_RISCV64
+#if CPUINFO_ARCH_ARM || CPUINFO_ARCH_ARM64 || CPUINFO_ARCH_RISCV32 || CPUINFO_ARCH_RISCV64 || CPUINFO_ARCH_PPC64
 #ifdef __linux__
 	if (cpuinfo_linux_cpu_to_uarch_index_map == NULL) {
 		/* Special case: avoid syscall on systems with only a single

src/cpuinfo/internal-api.h

@@ -34,7 +34,7 @@ extern CPUINFO_INTERNAL uint32_t cpuinfo_packages_count;
 extern CPUINFO_INTERNAL uint32_t cpuinfo_cache_count[cpuinfo_cache_level_max];
 extern CPUINFO_INTERNAL uint32_t cpuinfo_max_cache_size;
 
-#if CPUINFO_ARCH_ARM || CPUINFO_ARCH_ARM64 || CPUINFO_ARCH_RISCV32 || CPUINFO_ARCH_RISCV64
+#if CPUINFO_ARCH_ARM || CPUINFO_ARCH_ARM64 || CPUINFO_ARCH_RISCV32 || CPUINFO_ARCH_RISCV64 || CPUINFO_ARCH_PPC64
 extern CPUINFO_INTERNAL struct cpuinfo_uarch_info* cpuinfo_uarchs;
 extern CPUINFO_INTERNAL uint32_t cpuinfo_uarchs_count;
 #else
@@ -61,6 +61,7 @@ CPUINFO_PRIVATE void cpuinfo_arm_mach_init(void);
 CPUINFO_PRIVATE void cpuinfo_arm_linux_init(void);
 CPUINFO_PRIVATE void cpuinfo_riscv_linux_init(void);
 CPUINFO_PRIVATE void cpuinfo_emscripten_init(void);
+CPUINFO_PRIVATE void cpuinfo_powerpc_linux_init(void);
 
 CPUINFO_PRIVATE uint32_t cpuinfo_compute_max_cache_size(const struct cpuinfo_processor* processor);
 

src/init.c

@@ -33,6 +33,12 @@ bool CPUINFO_ABI cpuinfo_initialize(void) {
 #else
 	cpuinfo_log_error("operating system is not supported in cpuinfo");
 #endif
+#elif CPUINFO_ARCH_PPC64
+#if defined(__linux__)
+	pthread_once(&init_guard, &cpuinfo_powerpc_linux_init);
+#else
+	cpuinfo_log_error("operating system is not supported in cpuinfo");
+#endif
 #elif CPUINFO_ARCH_ARM || CPUINFO_ARCH_ARM64
 #if defined(__linux__)
 	pthread_once(&init_guard, &cpuinfo_arm_linux_init);

src/linux/api.h

@@ -51,6 +51,7 @@ CPUINFO_INTERNAL bool cpuinfo_linux_get_processor_package_id(
 	uint32_t processor,
 	uint32_t package_id[restrict static 1]);
 CPUINFO_INTERNAL bool cpuinfo_linux_get_processor_core_id(uint32_t processor, uint32_t core_id[restrict static 1]);
+CPUINFO_INTERNAL bool cpuinfo_linux_get_processor_online_status(uint32_t processor, uint32_t* online_status);
 
 CPUINFO_INTERNAL bool cpuinfo_linux_detect_possible_processors(
 	uint32_t max_processors_count,

src/linux/processors.c

@@ -33,6 +33,9 @@
 #define CORE_ID_FILENAME_FORMAT "/sys/devices/system/cpu/cpu%" PRIu32 "/topology/core_id"
 #define CORE_ID_FILESIZE 32
 
+#define PROCESSOR_ONLINE_FILENAME_SIZE (sizeof("/sys/devices/system/cpu/cpu" STRINGIFY(UINT32_MAX) "/online"))
+#define PROCESSOR_ONLINE_FILENAME_FORMAT "/sys/devices/system/cpu/cpu%" PRIu32 "/online"
+#define PROCESSOR_ONLINE_FILESIZE 32
 #define CORE_CPUS_FILENAME_SIZE (sizeof("/sys/devices/system/cpu/cpu" STRINGIFY(UINT32_MAX) "/topology/core_cpus_list"))
 #define CORE_CPUS_FILENAME_FORMAT "/sys/devices/system/cpu/cpu%" PRIu32 "/topology/core_cpus_list"
 #define CORE_SIBLINGS_FILENAME_SIZE \
@@ -280,6 +283,31 @@ bool cpuinfo_linux_get_processor_package_id(uint32_t processor, uint32_t package
 	}
 }
 
+bool cpuinfo_linux_get_processor_online_status(uint32_t processor, uint32_t* online_status_ptr) {
+	char processor_online_filename[PROCESSOR_ONLINE_FILENAME_SIZE];
+	const int chars_formatted =
+		snprintf(processor_online_filename, PROCESSOR_ONLINE_FILENAME_SIZE, PROCESSOR_ONLINE_FILENAME_FORMAT, processor);
+        if ((unsigned int)chars_formatted >= PROCESSOR_ONLINE_FILENAME_SIZE) {
+		cpuinfo_log_warning("failed to format filename for online status of processor %" PRIu32, processor);
+		return 0;
+	}
+	uint32_t online_status;
+	if (cpuinfo_linux_parse_small_file(processor_online_filename, PROCESSOR_ONLINE_FILESIZE, uint32_parser, &online_status)) {
+		cpuinfo_log_debug(
+			"parsed online status value of %" PRIu32 " for logical processor %" PRIu32 " from %s",
+			online_status,
+			processor,
+			processor_online_filename);
+			*online_status_ptr = online_status;
+			return true;
+	} else {
+	cpuinfo_log_info(
+	"failed to parse online status for processor %" PRIu32 " from %s", processor, processor_online_filename);
+	return false;
+	}
+}
+
+
 static bool max_processor_number_parser(uint32_t processor_list_start, uint32_t processor_list_end, void* context) {
 	uint32_t* processor_number_ptr = (uint32_t*)context;
 	const uint32_t processor_list_last = processor_list_end - 1;

src/powerpc/api.h

@@ -0,0 +1,21 @@
+#pragma once
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#include <cpuinfo.h>
+
+enum cpuinfo_powerpc_chipset_vendor {
+	cpuinfo_powerpc_chipset_vendor_unknown = 0,
+	cpuinfo_powerpc_chipset_vendor_ibm
+};
+void cpuinfo_powerpc_decode_vendor_uarch(
+	uint32_t vendor_id,
+	enum cpuinfo_vendor vendor[restrict static 1],
+	enum cpuinfo_uarch uarch[restrict static 1]);
+
+void cpuinfo_powerpc_decode_cache(
+        struct cpuinfo_cache l1i[restrict static 1],
+        struct cpuinfo_cache l1d[restrict static 1],
+        struct cpuinfo_cache l2[restrict static 1],
+        struct cpuinfo_cache l3[restrict static 1]);