[v0.98][ARM] Detect fire/icestorm CPUs and manually fill most of the fields

src/arm/midr.c

@@ -10,6 +10,12 @@
   #include <asm/hwcap.h>
 #elif defined __APPLE__ || __MACH__
   #include "sysctl.h"
+  #ifndef CPUFAMILY_ARM_FIRESTORM_ICESTORM
+    #define CPUFAMILY_ARM_FIRESTORM_ICESTORM 0x1B588BB3
+    // From arch/arm64/include/asm/cputype.h
+    #define MIDR_APPLE_M1_ICESTORM  0x610F0220
+    #define MIDR_APPLE_M1_FIRESTORM 0x610F0230
+  #endif
 #endif
 
 #include "../common/global.h"
@@ -171,12 +177,18 @@ struct features* get_features_info() {
       }
     #endif // ifdef __aarch64__
   #elif defined __APPLE__ || __MACH__
+    // Must be M1
+    feat->AES = true;
+    feat->CRC32 = true;
+    feat->SHA1 = true;
+    feat->SHA2 = true;
+    feat->NEON = true;
   #endif
 
   return feat;
 }
 
-void get_cpu_info_linux(struct cpuInfo* cpu) {
+struct cpuInfo* get_cpu_info_linux(struct cpuInfo* cpu) {
   int ncores = get_ncores_from_cpuinfo();
   bool success = false;
   int32_t* freq_array = malloc(sizeof(uint32_t) * ncores);
@@ -226,23 +238,61 @@ void get_cpu_info_linux(struct cpuInfo* cpu) {
   cpu->hv = malloc(sizeof(struct hypervisor));
   cpu->hv->present = false;
   cpu->soc = get_soc();
+
+  return cpu;
 }
 
-void get_cpu_info_mach(struct cpuInfo* cpu) {  
-  cpu->midr = 0;
-  cpu->arch = get_uarch_from_midr(cpu->midr, cpu);
+void fill_cpu_info_firestorm_icestorm(struct cpuInfo* cpu) {
+  // 1. Fill ICESTORM
+  struct cpuInfo* ice = cpu;
 
-  cpu->cach = get_cache_info(cpu);
-  cpu->feat = get_features_info(); 
-  cpu->topo = get_topology_from_sysctl();
-  cpu->freq = malloc(sizeof(struct frequency));
-  cpu->freq->base = UNKNOWN_FREQ;
-  cpu->freq->max = 1000000000;
+  ice->midr = MIDR_APPLE_M1_ICESTORM;
+  ice->arch = get_uarch_from_midr(ice->midr, ice);
+  ice->cach = get_cache_info(ice);
+  ice->feat = get_features_info();
+  ice->topo = malloc(sizeof(struct topology));
+  ice->topo->cach = ice->cach;
+  ice->topo->total_cores = 4;
+  ice->freq = malloc(sizeof(struct frequency));
+  ice->freq->base = UNKNOWN_FREQ;
+  ice->freq->max = 2064;
+  ice->hv = malloc(sizeof(struct hypervisor));
+  ice->hv->present = false;
+  ice->next_cpu = malloc(sizeof(struct cpuInfo));
 
-  cpu->num_cpus = 1;
-  cpu->hv = malloc(sizeof(struct hypervisor));
-  cpu->hv->present = false;
+  // 2. Fill FIRESTORM
+  struct cpuInfo* fire = ice->next_cpu;
+  fire->midr = MIDR_APPLE_M1_FIRESTORM;
+  fire->arch = get_uarch_from_midr(fire->midr, fire);
+  fire->cach = get_cache_info(fire);
+  fire->feat = get_features_info();
+  fire->topo = malloc(sizeof(struct topology));
+  fire->topo->cach = fire->cach;
+  fire->topo->total_cores = 4;
+  fire->freq = malloc(sizeof(struct frequency));
+  fire->freq->base = UNKNOWN_FREQ;
+  fire->freq->max = 3200;
+  fire->hv = malloc(sizeof(struct hypervisor));
+  fire->hv->present = false;
+  fire->next_cpu = NULL;
+}
+
+struct cpuInfo* get_cpu_info_mach(struct cpuInfo* cpu) {
+  uint32_t cpu_family = get_sys_info_by_name("hw.cpufamily");
+
+  // Manually fill the cpuInfo assuming that the CPU
+  // is a ARM_FIRESTORM_ICESTORM (Apple M1)
+  if(cpu_family == CPUFAMILY_ARM_FIRESTORM_ICESTORM) {
+    cpu->num_cpus = 2;
     cpu->soc = get_soc();
+    fill_cpu_info_firestorm_icestorm(cpu);
+  }
+  else {
+    printBug("Found invalid cpu_family: 0x%.8X", cpu_family);
+    return NULL;
+  }
+
+  return cpu;
 }
 
 struct cpuInfo* get_cpu_info() {
@@ -250,12 +300,10 @@ struct cpuInfo* get_cpu_info() {
   init_cpu_info(cpu);
 
   #ifdef __linux__
-    get_cpu_info_linux(cpu);    
+    return get_cpu_info_linux(cpu);
   #elif defined __APPLE__ || __MACH__
-     get_cpu_info_mach(cpu);
+    return get_cpu_info_mach(cpu);
   #endif
-
-  return cpu;
 }
 
 char* get_str_topology(struct cpuInfo* cpu, struct topology* topo, bool dual_socket) {

src/arm/sysctl.c

@@ -7,19 +7,19 @@
 #include "../common/global.h"
 #include "../common/cpu.h"
 
-struct topology* get_topology_from_sysctl() {
-  struct topology* t = malloc(sizeof(struct topology));
-  size_t dummy;
+uint32_t get_sys_info_by_name(char* name) {
+  size_t size = 0;
+  uint32_t ret = 0;
 
-  if(sysctlbyname("hw.physicalcpu_max", &t->total_cores, &dummy, NULL, 0) != 0) {
-    printWarn("sysctlbyname(\"hw.physicalcpu_max\") failed: %s\n", strerror(errno));
-    t->total_cores = 1;
+  if (sysctlbyname(name, NULL, &size, NULL, 0) != 0) {
+    printWarn("sysctlbyname(\"%s\") failed: %s", name, strerror(errno));
   }
-  else if(t->total_cores <= 0) {
-    printWarn("sysctlbyname(\"hw.physicalcpu_max\") returned invalid value: %d\n", t->total_cores);
-    t->total_cores = 1;
+  else if (size == sizeof(uint32_t)) {
+    sysctlbyname(name, &ret, &size, NULL, 0);
+  }
+  else {
+    printWarn("sysctl does not support non-integer lookup for (\"%s\")", name);
   }
 
-  return t;
+  return ret;
 }
-

src/arm/sysctl.h

@@ -1,6 +1,6 @@
 #ifndef __SYSCTL__
 #define __SYSCTL__
 
-struct topology* get_topology_from_sysctl();
+uint32_t get_sys_info_by_name(char* name);
 
 #endif

src/arm/uarch.c

@@ -34,6 +34,7 @@ enum {
   ISA_ARMv8_1_A,
   ISA_ARMv8_2_A,
   ISA_ARMv8_3_A,
+  ISA_ARMv8_4_A,
 };
 
 enum {
@@ -93,6 +94,8 @@ enum {
   UARCH_TEMPEST,    // Apple A12 processor (big cores).
   UARCH_LIGHTNING,  // Apple A13 processor (big cores).
   UARCH_THUNDER,    // Apple A13 processor (little cores).
+  UARCH_ICESTORM,   // Apple M1 processor (little cores).
+  UARCH_FIRESTORM,  // Apple M1 processor (big cores).
   // CAVIUM
   UARCH_THUNDERX,   // Cavium ThunderX
   UARCH_THUNDERX2,  //  Cavium ThunderX2 (originally Broadcom Vulkan).
@@ -150,6 +153,8 @@ static const ISA isas_uarch[] = {
   [UARCH_EXYNOS_M3]    = ISA_ARMv8_A,
   [UARCH_EXYNOS_M4]    = ISA_ARMv8_2_A,
   [UARCH_EXYNOS_M5]    = ISA_ARMv8_2_A,
+  [UARCH_ICESTORM]     = ISA_ARMv8_4_A,
+  [UARCH_FIRESTORM]    = ISA_ARMv8_4_A,
   [UARCH_PJ4]          = ISA_ARMv7_A,
 };
 
@@ -164,6 +169,7 @@ static char* isas_string[] = {
   [ISA_ARMv8_1_A] = "ARMv8.1",
   [ISA_ARMv8_2_A] = "ARMv8.2",
   [ISA_ARMv8_3_A] = "ARMv8.3",
+  [ISA_ARMv8_4_A] = "ARMv8.4"
 };
 
 #define UARCH_START if (false) {}
@@ -282,6 +288,9 @@ struct uarch* get_uarch_from_midr(uint32_t midr, struct cpuInfo* cpu) {
   CHECK_UARCH(arch, cpu, 'S', 0x003, 1,  NA, "Exynos M4",             UARCH_EXYNOS_M4,    CPU_VENDOR_SAMSUNG)   // Exynos 9820
   CHECK_UARCH(arch, cpu, 'S', 0x004, 1,  NA, "Exynos M5",             UARCH_EXYNOS_M5,    CPU_VENDOR_SAMSUNG)   // Exynos 9820 (this one looks wrong at uarch.c ...)
 
+  CHECK_UARCH(arch, cpu, 'a', 0x022, NA, NA, "Icestorm",              UARCH_ICESTORM,     CPU_VENDOR_APPLE)
+  CHECK_UARCH(arch, cpu, 'a', 0x023, NA, NA, "Firestorm",             UARCH_FIRESTORM,    CPU_VENDOR_APPLE)
+
   CHECK_UARCH(arch, cpu, 'V', 0x581, NA, NA, "PJ4",                   UARCH_PJ4,          CPU_VENDOR_MARVELL)
   CHECK_UARCH(arch, cpu, 'V', 0x584, NA, NA, "PJ4B-MP",               UARCH_PJ4,          CPU_VENDOR_MARVELL)
   

src/common/cpu.h

@@ -10,6 +10,7 @@ enum {
   CPU_VENDOR_AMD,
 // ARCH_ARM
   CPU_VENDOR_ARM,
+  CPU_VENDOR_APPLE,
   CPU_VENDOR_BROADCOM,
   CPU_VENDOR_CAVIUM,
   CPU_VENDOR_NVIDIA,