diff options
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/Kconfig | 3 | ||||
| -rw-r--r-- | arch/x86/crypto/aesni-intel_glue.c | 12 | ||||
| -rw-r--r-- | arch/x86/crypto/crc32c-intel.c | 11 | ||||
| -rw-r--r-- | arch/x86/crypto/ghash-clmulni-intel_glue.c | 12 | ||||
| -rw-r--r-- | arch/x86/include/asm/cpu_device_id.h | 13 | ||||
| -rw-r--r-- | arch/x86/include/asm/cpufeature.h | 1 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/Makefile | 1 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/match.c | 91 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/scattered.c | 1 | ||||
| -rw-r--r-- | arch/x86/kernel/microcode_core.c | 15 |
10 files changed, 150 insertions, 10 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 09675d3..d523a6c 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -180,6 +180,9 @@ config ARCH_HAS_DEFAULT_IDLE config ARCH_HAS_CACHE_LINE_SIZE def_bool y +config ARCH_HAS_CPU_AUTOPROBE + def_bool y + config HAVE_SETUP_PER_CPU_AREA def_bool y diff --git a/arch/x86/crypto/aesni-intel_glue.c b/arch/x86/crypto/aesni-intel_glue.c index 545d0ce..b3350bd 100644 --- a/arch/x86/crypto/aesni-intel_glue.c +++ b/arch/x86/crypto/aesni-intel_glue.c @@ -28,6 +28,7 @@ #include <crypto/aes.h> #include <crypto/cryptd.h> #include <crypto/ctr.h> +#include <asm/cpu_device_id.h> #include <asm/i387.h> #include <asm/aes.h> #include <crypto/scatterwalk.h> @@ -1253,14 +1254,19 @@ static struct crypto_alg __rfc4106_alg = { }; #endif + +static const struct x86_cpu_id aesni_cpu_id[] = { + X86_FEATURE_MATCH(X86_FEATURE_AES), + {} +}; +MODULE_DEVICE_TABLE(x86cpu, aesni_cpu_id); + static int __init aesni_init(void) { int err; - if (!cpu_has_aes) { - printk(KERN_INFO "Intel AES-NI instructions are not detected.\n"); + if (!x86_match_cpu(aesni_cpu_id)) return -ENODEV; - } if ((err = crypto_fpu_init())) goto fpu_err; diff --git a/arch/x86/crypto/crc32c-intel.c b/arch/x86/crypto/crc32c-intel.c index b9d0026..493f959 100644 --- a/arch/x86/crypto/crc32c-intel.c +++ b/arch/x86/crypto/crc32c-intel.c @@ -31,6 +31,7 @@ #include <crypto/internal/hash.h> #include <asm/cpufeature.h> +#include <asm/cpu_device_id.h> #define CHKSUM_BLOCK_SIZE 1 #define CHKSUM_DIGEST_SIZE 4 @@ -173,13 +174,17 @@ static struct shash_alg alg = { } }; +static const struct x86_cpu_id crc32c_cpu_id[] = { + X86_FEATURE_MATCH(X86_FEATURE_XMM4_2), + {} +}; +MODULE_DEVICE_TABLE(x86cpu, crc32c_cpu_id); static int __init crc32c_intel_mod_init(void) { - if (cpu_has_xmm4_2) - return crypto_register_shash(&alg); - else + if (!x86_match_cpu(crc32c_cpu_id)) return -ENODEV; + return crypto_register_shash(&alg); } static void __exit crc32c_intel_mod_fini(void) diff --git a/arch/x86/crypto/ghash-clmulni-intel_glue.c b/arch/x86/crypto/ghash-clmulni-intel_glue.c index 976aa64..b4bf0a6 100644 --- a/arch/x86/crypto/ghash-clmulni-intel_glue.c +++ b/arch/x86/crypto/ghash-clmulni-intel_glue.c @@ -20,6 +20,7 @@ #include <crypto/gf128mul.h> #include <crypto/internal/hash.h> #include <asm/i387.h> +#include <asm/cpu_device_id.h> #define GHASH_BLOCK_SIZE 16 #define GHASH_DIGEST_SIZE 16 @@ -294,15 +295,18 @@ static struct ahash_alg ghash_async_alg = { }, }; +static const struct x86_cpu_id pcmul_cpu_id[] = { + X86_FEATURE_MATCH(X86_FEATURE_PCLMULQDQ), /* Pickle-Mickle-Duck */ + {} +}; +MODULE_DEVICE_TABLE(x86cpu, pcmul_cpu_id); + static int __init ghash_pclmulqdqni_mod_init(void) { int err; - if (!cpu_has_pclmulqdq) { - printk(KERN_INFO "Intel PCLMULQDQ-NI instructions are not" - " detected.\n"); + if (!x86_match_cpu(pcmul_cpu_id)) return -ENODEV; - } err = crypto_register_shash(&ghash_alg); if (err) diff --git a/arch/x86/include/asm/cpu_device_id.h b/arch/x86/include/asm/cpu_device_id.h new file mode 100644 index 0000000..ff501e5 --- /dev/null +++ b/arch/x86/include/asm/cpu_device_id.h @@ -0,0 +1,13 @@ +#ifndef _CPU_DEVICE_ID +#define _CPU_DEVICE_ID 1 + +/* + * Declare drivers belonging to specific x86 CPUs + * Similar in spirit to pci_device_id and related PCI functions + */ + +#include <linux/mod_devicetable.h> + +extern const struct x86_cpu_id *x86_match_cpu(const struct x86_cpu_id *match); + +#endif diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h index 8d67d42..dcb839e 100644 --- a/arch/x86/include/asm/cpufeature.h +++ b/arch/x86/include/asm/cpufeature.h @@ -177,6 +177,7 @@ #define X86_FEATURE_PLN (7*32+ 5) /* Intel Power Limit Notification */ #define X86_FEATURE_PTS (7*32+ 6) /* Intel Package Thermal Status */ #define X86_FEATURE_DTS (7*32+ 7) /* Digital Thermal Sensor */ +#define X86_FEATURE_HW_PSTATE (7*32+ 8) /* AMD HW-PState */ /* Virtualization flags: Linux defined, word 8 */ #define X86_FEATURE_TPR_SHADOW (8*32+ 0) /* Intel TPR Shadow */ diff --git a/arch/x86/kernel/cpu/Makefile b/arch/x86/kernel/cpu/Makefile index 25f24dc..6ab6aa2 100644 --- a/arch/x86/kernel/cpu/Makefile +++ b/arch/x86/kernel/cpu/Makefile @@ -16,6 +16,7 @@ obj-y := intel_cacheinfo.o scattered.o topology.o obj-y += proc.o capflags.o powerflags.o common.o obj-y += vmware.o hypervisor.o sched.o mshyperv.o obj-y += rdrand.o +obj-y += match.o obj-$(CONFIG_X86_32) += bugs.o obj-$(CONFIG_X86_64) += bugs_64.o diff --git a/arch/x86/kernel/cpu/match.c b/arch/x86/kernel/cpu/match.c new file mode 100644 index 0000000..5502b28 --- /dev/null +++ b/arch/x86/kernel/cpu/match.c @@ -0,0 +1,91 @@ +#include <asm/cpu_device_id.h> +#include <asm/processor.h> +#include <linux/cpu.h> +#include <linux/module.h> +#include <linux/slab.h> + +/** + * x86_match_cpu - match current CPU again an array of x86_cpu_ids + * @match: Pointer to array of x86_cpu_ids. Last entry terminated with + * {}. + * + * Return the entry if the current CPU matches the entries in the + * passed x86_cpu_id match table. Otherwise NULL. The match table + * contains vendor (X86_VENDOR_*), family, model and feature bits or + * respective wildcard entries. + * + * A typical table entry would be to match a specific CPU + * { X86_VENDOR_INTEL, 6, 0x12 } + * or to match a specific CPU feature + * { X86_FEATURE_MATCH(X86_FEATURE_FOOBAR) } + * + * Fields can be wildcarded with %X86_VENDOR_ANY, %X86_FAMILY_ANY, + * %X86_MODEL_ANY, %X86_FEATURE_ANY or 0 (except for vendor) + * + * Arrays used to match for this should also be declared using + * MODULE_DEVICE_TABLE(x86_cpu, ...) + * + * This always matches against the boot cpu, assuming models and features are + * consistent over all CPUs. + */ +const struct x86_cpu_id *x86_match_cpu(const struct x86_cpu_id *match) +{ + const struct x86_cpu_id *m; + struct cpuinfo_x86 *c = &boot_cpu_data; + + for (m = match; m->vendor | m->family | m->model | m->feature; m++) { + if (m->vendor != X86_VENDOR_ANY && c->x86_vendor != m->vendor) + continue; + if (m->family != X86_FAMILY_ANY && c->x86 != m->family) + continue; + if (m->model != X86_MODEL_ANY && c->x86_model != m->model) + continue; + if (m->feature != X86_FEATURE_ANY && !cpu_has(c, m->feature)) + continue; + return m; + } + return NULL; +} +EXPORT_SYMBOL(x86_match_cpu); + +ssize_t arch_print_cpu_modalias(struct device *dev, + struct device_attribute *attr, + char *bufptr) +{ + int size = PAGE_SIZE; + int i, n; + char *buf = bufptr; + + n = snprintf(buf, size, "x86cpu:vendor:%04X:family:%04X:" + "model:%04X:feature:", + boot_cpu_data.x86_vendor, + boot_cpu_data.x86, + boot_cpu_data.x86_model); + size -= n; + buf += n; + size -= 1; + for (i = 0; i < NCAPINTS*32; i++) { + if (boot_cpu_has(i)) { + n = snprintf(buf, size, ",%04X", i); + if (n >= size) { + WARN(1, "x86 features overflow page\n"); + break; + } + size -= n; + buf += n; + } + } + *buf++ = '\n'; + return buf - bufptr; +} + +int arch_cpu_uevent(struct device *dev, struct kobj_uevent_env *env) +{ + char *buf = kzalloc(PAGE_SIZE, GFP_KERNEL); + if (buf) { + arch_print_cpu_modalias(NULL, NULL, buf); + add_uevent_var(env, "MODALIAS=%s", buf); + kfree(buf); + } + return 0; +} diff --git a/arch/x86/kernel/cpu/scattered.c b/arch/x86/kernel/cpu/scattered.c index c7f64e6..addf9e8 100644 --- a/arch/x86/kernel/cpu/scattered.c +++ b/arch/x86/kernel/cpu/scattered.c @@ -40,6 +40,7 @@ void __cpuinit init_scattered_cpuid_features(struct cpuinfo_x86 *c) { X86_FEATURE_EPB, CR_ECX, 3, 0x00000006, 0 }, { X86_FEATURE_XSAVEOPT, CR_EAX, 0, 0x0000000d, 1 }, { X86_FEATURE_CPB, CR_EDX, 9, 0x80000007, 0 }, + { X86_FEATURE_HW_PSTATE, CR_EDX, 7, 0x80000007, 0 }, { X86_FEATURE_NPT, CR_EDX, 0, 0x8000000a, 0 }, { X86_FEATURE_LBRV, CR_EDX, 1, 0x8000000a, 0 }, { X86_FEATURE_SVML, CR_EDX, 2, 0x8000000a, 0 }, diff --git a/arch/x86/kernel/microcode_core.c b/arch/x86/kernel/microcode_core.c index fda91c3..87a0f86 100644 --- a/arch/x86/kernel/microcode_core.c +++ b/arch/x86/kernel/microcode_core.c @@ -86,6 +86,7 @@ #include <asm/microcode.h> #include <asm/processor.h> +#include <asm/cpu_device_id.h> MODULE_DESCRIPTION("Microcode Update Driver"); MODULE_AUTHOR("Tigran Aivazian <tigran@aivazian.fsnet.co.uk>"); @@ -504,6 +505,20 @@ static struct notifier_block __refdata mc_cpu_notifier = { .notifier_call = mc_cpu_callback, }; +#ifdef MODULE +/* Autoload on Intel and AMD systems */ +static const struct x86_cpu_id microcode_id[] = { +#ifdef CONFIG_MICROCODE_INTEL + { X86_VENDOR_INTEL, X86_FAMILY_ANY, X86_MODEL_ANY, }, +#endif +#ifdef CONFIG_MICROCODE_AMD + { X86_VENDOR_AMD, X86_FAMILY_ANY, X86_MODEL_ANY, }, +#endif + {} +}; +MODULE_DEVICE_TABLE(x86cpu, microcode_id); +#endif + static int __init microcode_init(void) { struct cpuinfo_x86 *c = &cpu_data(0); |
