cpuid: Introduce cpuid_write_info

This function writes CPU information to a file.
Signed-off-by: Ahmed Samy <f.fallen45@gmail.com>

ccan/cpuid/cpuid.h

@@ -105,6 +105,16 @@ enum {
 	CPUID_FEAT_ECX_OSXSAVE      = 1 << 27, 
 	CPUID_FEAT_ECX_AVX          = 1 << 28,
 
+	CPUID_FEAT_ECX_ALL 	    = CPUID_FEAT_ECX_SSE3 | CPUID_FEAT_ECX_PCLMUL | CPUID_FEAT_ECX_DTES64
+					| CPUID_FEAT_ECX_MONITOR | CPUID_FEAT_ECX_DS_CPL | CPUID_FEAT_ECX_VMX
+					| CPUID_FEAT_ECX_SMX | CPUID_FEAT_ECX_EST | CPUID_FEAT_ECX_TM2
+					| CPUID_FEAT_ECX_SSSE3 | CPUID_FEAT_ECX_CID | CPUID_FEAT_ECX_FMA
+					| CPUID_FEAT_ECX_CX16 | CPUID_FEAT_ECX_ETPRD | CPUID_FEAT_ECX_PDCM
+					| CPUID_FEAT_ECX_DCA | CPUID_FEAT_ECX_SSE4_1 | CPUID_FEAT_ECX_SSE4_2
+					| CPUID_FEAT_ECX_x2APIC | CPUID_FEAT_ECX_MOVBE | CPUID_FEAT_ECX_POPCNT
+					| CPUID_FEAT_ECX_AES | CPUID_FEAT_ECX_XSAVE | CPUID_FEAT_ECX_OSXSAVE
+					| CPUID_FEAT_ECX_AVX,
+
 	CPUID_FEAT_EDX_FPU          = 1 << 0,  
 	CPUID_FEAT_EDX_VME          = 1 << 1,  
 	CPUID_FEAT_EDX_DE           = 1 << 2,  
@@ -134,7 +144,18 @@ enum {
 	CPUID_FEAT_EDX_HTT          = 1 << 28, 
 	CPUID_FEAT_EDX_TM1          = 1 << 29, 
 	CPUID_FEAT_EDX_IA64         = 1 << 30,
-	CPUID_FEAT_EDX_PBE          = 1 << 31
+	CPUID_FEAT_EDX_PBE          = 1 << 31,
+
+	CPUID_FEAT_EDX_ALL 	    = CPUID_FEAT_EDX_FPU | CPUID_FEAT_EDX_VME | CPUID_FEAT_EDX_DE
+					| CPUID_FEAT_EDX_PSE | CPUID_FEAT_EDX_TSC | CPUID_FEAT_EDX_MSR
+					| CPUID_FEAT_EDX_PAE | CPUID_FEAT_EDX_MCE | CPUID_FEAT_EDX_CX8
+					| CPUID_FEAT_EDX_APIC | CPUID_FEAT_EDX_SEP | CPUID_FEAT_EDX_MTRR
+					| CPUID_FEAT_EDX_PGE | CPUID_FEAT_EDX_MCA | CPUID_FEAT_EDX_CMOV
+					| CPUID_FEAT_EDX_PAT | CPUID_FEAT_EDX_PSE36 | CPUID_FEAT_EDX_PSN
+					| CPUID_FEAT_EDX_CLF | CPUID_FEAT_EDX_DTES | CPUID_FEAT_EDX_ACPI
+					| CPUID_FEAT_EDX_MMX | CPUID_FEAT_EDX_FXSR | CPUID_FEAT_EDX_SSE
+					| CPUID_FEAT_EDX_SSE2 | CPUID_FEAT_EDX_SS | CPUID_FEAT_EDX_HTT
+					| CPUID_FEAT_EDX_TM1 | CPUID_FEAT_EDX_IA64 | CPUID_FEAT_EDX_PBE
 };
 
 typedef enum cputype {
@@ -268,6 +289,25 @@ uint32_t cpuid_highest_ext_func_supported(void);
  */
 void cpuid(cpuid_t info, uint32_t *buf);
 
+/**
+ * cpuid_write_info - Write specified CPU information to a file.
+ * @info: Bit set of information to write.
+ * @featureset: Bit set of features to write.
+ * @outfile: Output filename (Max 256).
+ *
+ * If @outfile is NULL, a name is choosen in the following format:
+ * 	CPUVENDOR_PROCESSORBRAND.cpuid
+ *
+ * Returns true on success, false otherwise.
+ *
+ * Example usage:
+ * 	if (!cpuid_write_info(CPUID_VENDORID | CPUID_PROC_BRAND_STRING,
+ * 				CPUID_FEAT_ECX_SSE3 | CPUID_FEAT_EDX_FPU,
+ * 				"cpuinfo.cpuid"))
+ * 		... error ...
+ */
+bool cpuid_write_info(uint32_t info, uint32_t featureset, const char *outfile);
+
 /**
  * cpuid_test_feature - Test if @feature is available
  *
@@ -298,6 +338,7 @@ bool cpuid_has_edxfeature(int feature);
 
 #define cpuid_is_supported() 				BUILD_ASSERT_OR_ZERO(0)
 #define cpuid(info, buf) 				BUILD_ASSERT_OR_ZERO(0)
+#define cpuid_write_info(info, featureset, outfile)	BUILD_ASSERT_OR_ZERO(0)
 
 #define cpuid_highest_ext_func_supported() 		BUILD_ASSERT_OR_ZERO(0)
 #define cpuid_test_feature(feature) 			BUILD_ASSERT_OR_ZERO(0)

ccan/cpuid/test/run.c

@@ -10,38 +10,14 @@ int main(void)
 		return 1;
 	}
 
-	char cputype[12];
-	if (cpuid_sprintf_cputype(cpuid_get_cpu_type(), cputype))
-		printf ("Vendor ID: %s\n", cputype);
-
-	char buf[48];
-	cpuid(CPUID_PROC_BRAND_STRING, (uint32_t *)buf);
-	printf ("Processor Brand: %s\n", buf);
-
-	uint32_t procinfo[9];
-	cpuid(CPUID_PROCINFO_AND_FEATUREBITS, procinfo);
-	printf("Stepping: %d Model: 0x%X Family: %d extended model: %d extended family: %d\n",
-		procinfo[0], procinfo[1], procinfo[2], procinfo[3], procinfo[4]);
-	printf("Brand Index: %d CL Flush Line Size: %d Logical Processors: %d Initial APICID: %d\n",
-		procinfo[5], procinfo[6], procinfo[7], procinfo[8]);
-
-	printf ("Highest extended function supported: %#010x\n", cpuid_highest_ext_func_supported());
-
-	uint32_t phys_virt[2];
-	cpuid(CPUID_VIRT_PHYS_ADDR_SIZES, phys_virt);
-	printf ("Physical address size: %d\nVirtual address size: %d\n", phys_virt[0], phys_virt[1]);
-
-	uint32_t extfeatures[2];
-	cpuid(CPUID_EXTENDED_PROC_INFO_FEATURE_BITS, extfeatures);
-	printf ("Extended processor info and feature bits: %d %d\n", extfeatures[0], extfeatures[1]);
-
-	uint32_t l2c[3];
-	cpuid(CPUID_EXTENDED_L2_CACHE_FEATURES, l2c);
-	printf("L2 Line size: %u bytes\tAssociativity: %02xh\tCache Size: %u KB\n",
-		l2c[0], l2c[1], l2c[2]);
+	uint32_t info = CPUID_HIGHEST_EXTENDED_FUNCTION_SUPPORTED | CPUID_EXTENDED_L2_CACHE_FEATURES | CPUID_VIRT_PHYS_ADDR_SIZES
+			| CPUID_PROCINFO_AND_FEATUREBITS;
+	uint32_t featureset = CPUID_FEAT_ECX_ALL | CPUID_FEAT_EDX_ALL;
+	if (!cpuid_write_info(info, featureset, NULL)) {
+		printf("Failed to write CPU information!\n");
+		return 1;
+	}
 
-	uint32_t invalid;
-	cpuid(0x0ffffffUL, &invalid);
-	printf ("Testing invalid: %#010x\n", invalid);
+	printf("Wrote CPU information\n");
 	return 0;
 }