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[Pal] Move x86_64-specific CPUID into cpu.h, pal-arch.h, db_main-x86_…
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| Original file line number | Diff line number | Diff line change |
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| /* SPDX-License-Identifier: LGPL-3.0-or-later */ | ||
| /* Copyright (C) 2014 Stony Brook University */ | ||
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| /* | ||
| * db_main-x86_64.c | ||
| * | ||
| * This file contains x86_64-specific functions of the PAL loader. | ||
| */ | ||
|
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| #include "api.h" | ||
| #include "bogomips.h" | ||
| #include "pal.h" | ||
| #include "pal_debug.h" | ||
| #include "pal_internal.h" | ||
| #include "pal_linux.h" | ||
| #include "pal_security.h" | ||
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| #define FOUR_CHARS_VALUE(s, w) \ | ||
| (s)[0] = (w) & 0xff; \ | ||
| (s)[1] = ((w) >> 8) & 0xff; \ | ||
| (s)[2] = ((w) >> 16) & 0xff; \ | ||
| (s)[3] = ((w) >> 24) & 0xff; | ||
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| #define BPI 32 | ||
| #define POWER2(power) \ | ||
| (1ULL << (power)) | ||
| #define RIGHTMASK(width) \ | ||
| (((unsigned long)(width) >= BPI) ? ~0ULL : POWER2(width) - 1ULL) | ||
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| #define BIT_EXTRACT_LE(value, start, after) \ | ||
| (((unsigned long)(value) & RIGHTMASK(after)) >> start) | ||
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| static char* cpu_flags[] = { | ||
| "fpu", // "x87 FPU on chip" | ||
| "vme", // "virtual-8086 mode enhancement" | ||
| "de", // "debugging extensions" | ||
| "pse", // "page size extensions" | ||
| "tsc", // "time stamp counter" | ||
| "msr", // "RDMSR and WRMSR support" | ||
| "pae", // "physical address extensions" | ||
| "mce", // "machine check exception" | ||
| "cx8", // "CMPXCHG8B inst." | ||
| "apic", // "APIC on chip" | ||
| NULL, | ||
| "sep", // "SYSENTER and SYSEXIT" | ||
| "mtrr", // "memory type range registers" | ||
| "pge", // "PTE global bit" | ||
| "mca", // "machine check architecture" | ||
| "cmov", // "conditional move/compare instruction" | ||
| "pat", // "page attribute table" | ||
| "pse36", // "page size extension" | ||
| "pn", // "processor serial number" | ||
| "clflush", // "CLFLUSH instruction" | ||
| NULL, | ||
| "dts", // "debug store" | ||
| "acpi", // "Onboard thermal control" | ||
| "mmx", // "MMX Technology" | ||
| "fxsr", // "FXSAVE/FXRSTOR" | ||
| "sse", // "SSE extensions" | ||
| "sse2", // "SSE2 extensions" | ||
| "ss", // "self snoop" | ||
| "ht", // "hyper-threading / multi-core supported" | ||
| "tm", // "therm. monitor" | ||
| "ia64", // "IA64" | ||
| "pbe", // "pending break event" | ||
| }; | ||
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| static ssize_t read_file_buffer(const char* filename, char* buf, size_t buf_size) { | ||
| int fd; | ||
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| fd = ocall_open(filename, O_RDONLY, 0); | ||
| if (fd < 0) | ||
| return fd; | ||
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| /* Although the whole file might not fit in this size, the first cpu description should. */ | ||
| ssize_t n = ocall_read(fd, buf, buf_size); | ||
| ocall_close(fd); | ||
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| return n; | ||
| } | ||
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| static double get_bogomips(void) { | ||
| char buf[2048]; | ||
| ssize_t len; | ||
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| len = read_file_buffer("/proc/cpuinfo", buf, sizeof(buf) - 1); | ||
| if (len < 0) | ||
| return 0.0; | ||
| buf[len] = 0; | ||
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| return sanitize_bogomips_value(get_bogomips_from_cpuinfo_buf(buf)); | ||
| } | ||
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| int _DkGetCPUInfo (PAL_CPU_INFO* ci) { | ||
| unsigned int words[PAL_CPUID_WORD_NUM]; | ||
| int rv = 0; | ||
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| const size_t VENDOR_ID_SIZE = 13; | ||
| char* vendor_id = malloc(VENDOR_ID_SIZE); | ||
| _DkCpuIdRetrieve(0, 0, words); | ||
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| FOUR_CHARS_VALUE(&vendor_id[0], words[PAL_CPUID_WORD_EBX]); | ||
| FOUR_CHARS_VALUE(&vendor_id[4], words[PAL_CPUID_WORD_EDX]); | ||
| FOUR_CHARS_VALUE(&vendor_id[8], words[PAL_CPUID_WORD_ECX]); | ||
| vendor_id[VENDOR_ID_SIZE - 1] = '\0'; | ||
| ci->cpu_vendor = vendor_id; | ||
| // Must be an Intel CPU | ||
| if (memcmp(vendor_id, "GenuineIntel", 12)) { | ||
| free(vendor_id); | ||
| return -PAL_ERROR_INVAL; | ||
| } | ||
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| const size_t BRAND_SIZE = 49; | ||
| char* brand = malloc(BRAND_SIZE); | ||
| _DkCpuIdRetrieve(0x80000002, 0, words); | ||
| memcpy(&brand[ 0], words, sizeof(unsigned int) * PAL_CPUID_WORD_NUM); | ||
| _DkCpuIdRetrieve(0x80000003, 0, words); | ||
| memcpy(&brand[16], words, sizeof(unsigned int) * PAL_CPUID_WORD_NUM); | ||
| _DkCpuIdRetrieve(0x80000004, 0, words); | ||
| memcpy(&brand[32], words, sizeof(unsigned int) * PAL_CPUID_WORD_NUM); | ||
| brand[BRAND_SIZE - 1] = '\0'; | ||
| ci->cpu_brand = brand; | ||
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| /* we cannot use CPUID(0xb) because it counts even disabled-by-BIOS cores (e.g. HT cores); | ||
| * instead, this is passed in via pal_sec at start-up time. */ | ||
| ci->cpu_num = pal_sec.num_cpus; | ||
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| _DkCpuIdRetrieve(1, 0, words); | ||
| ci->cpu_family = BIT_EXTRACT_LE(words[PAL_CPUID_WORD_EAX], 8, 12) + | ||
| BIT_EXTRACT_LE(words[PAL_CPUID_WORD_EAX], 20, 28); | ||
| ci->cpu_model = BIT_EXTRACT_LE(words[PAL_CPUID_WORD_EAX], 4, 8) + | ||
| (BIT_EXTRACT_LE(words[PAL_CPUID_WORD_EAX], 16, 20) << 4); | ||
| ci->cpu_stepping = BIT_EXTRACT_LE(words[PAL_CPUID_WORD_EAX], 0, 4); | ||
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| int flen = 0, fmax = 80; | ||
| char* flags = malloc(fmax); | ||
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| for (int i = 0 ; i < 32 ; i++) { | ||
| if (!cpu_flags[i]) | ||
| continue; | ||
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| if (BIT_EXTRACT_LE(words[PAL_CPUID_WORD_EDX], i, i + 1)) { | ||
| int len = strlen(cpu_flags[i]); | ||
| if (flen + len + 1 > fmax) { | ||
| char* new_flags = malloc(fmax * 2); | ||
| memcpy(new_flags, flags, flen); | ||
| free(flags); | ||
| fmax *= 2; | ||
| flags = new_flags; | ||
| } | ||
| memcpy(flags + flen, cpu_flags[i], len); | ||
| flen += len; | ||
| flags[flen++] = ' '; | ||
| } | ||
| } | ||
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| flags[flen ? flen - 1 : 0] = 0; | ||
| ci->cpu_flags = flags; | ||
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| ci->cpu_bogomips = get_bogomips(); | ||
| if (ci->cpu_bogomips == 0.0) { | ||
| SGX_DBG(DBG_E, "Warning: bogomips could not be retrieved, passing 0.0 to the application\n"); | ||
| } | ||
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| return rv; | ||
| } |
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