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58ce8d6d3a
... to the header. Split the family acquiring function into a
main one, doing CPUID and a helper which computes the extended
family and is used in multiple places. Get rid of the locally-grown
get_x86_{family,model}().
While at it, rename local variables to something more descriptive and
vertically align assignments for better readability.
There should be no functionality change resulting from this patch.
Signed-off-by: Borislav Petkov <bp@suse.de>
166 lines
3.9 KiB
C
166 lines
3.9 KiB
C
#ifndef _ASM_X86_MICROCODE_H
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#define _ASM_X86_MICROCODE_H
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#define native_rdmsr(msr, val1, val2) \
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do { \
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u64 __val = native_read_msr((msr)); \
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(void)((val1) = (u32)__val); \
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(void)((val2) = (u32)(__val >> 32)); \
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} while (0)
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#define native_wrmsr(msr, low, high) \
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native_write_msr(msr, low, high)
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#define native_wrmsrl(msr, val) \
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native_write_msr((msr), \
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(u32)((u64)(val)), \
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(u32)((u64)(val) >> 32))
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struct cpu_signature {
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unsigned int sig;
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unsigned int pf;
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unsigned int rev;
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};
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struct device;
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enum ucode_state { UCODE_ERROR, UCODE_OK, UCODE_NFOUND };
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extern bool dis_ucode_ldr;
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struct microcode_ops {
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enum ucode_state (*request_microcode_user) (int cpu,
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const void __user *buf, size_t size);
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enum ucode_state (*request_microcode_fw) (int cpu, struct device *,
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bool refresh_fw);
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void (*microcode_fini_cpu) (int cpu);
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/*
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* The generic 'microcode_core' part guarantees that
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* the callbacks below run on a target cpu when they
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* are being called.
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* See also the "Synchronization" section in microcode_core.c.
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*/
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int (*apply_microcode) (int cpu);
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int (*collect_cpu_info) (int cpu, struct cpu_signature *csig);
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};
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struct ucode_cpu_info {
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struct cpu_signature cpu_sig;
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int valid;
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void *mc;
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};
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extern struct ucode_cpu_info ucode_cpu_info[];
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#ifdef CONFIG_MICROCODE_INTEL
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extern struct microcode_ops * __init init_intel_microcode(void);
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#else
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static inline struct microcode_ops * __init init_intel_microcode(void)
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{
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return NULL;
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}
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#endif /* CONFIG_MICROCODE_INTEL */
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#ifdef CONFIG_MICROCODE_AMD
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extern struct microcode_ops * __init init_amd_microcode(void);
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extern void __exit exit_amd_microcode(void);
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#else
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static inline struct microcode_ops * __init init_amd_microcode(void)
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{
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return NULL;
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}
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static inline void __exit exit_amd_microcode(void) {}
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#endif
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#ifdef CONFIG_MICROCODE_EARLY
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#define MAX_UCODE_COUNT 128
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#define QCHAR(a, b, c, d) ((a) + ((b) << 8) + ((c) << 16) + ((d) << 24))
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#define CPUID_INTEL1 QCHAR('G', 'e', 'n', 'u')
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#define CPUID_INTEL2 QCHAR('i', 'n', 'e', 'I')
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#define CPUID_INTEL3 QCHAR('n', 't', 'e', 'l')
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#define CPUID_AMD1 QCHAR('A', 'u', 't', 'h')
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#define CPUID_AMD2 QCHAR('e', 'n', 't', 'i')
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#define CPUID_AMD3 QCHAR('c', 'A', 'M', 'D')
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#define CPUID_IS(a, b, c, ebx, ecx, edx) \
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(!((ebx ^ (a))|(edx ^ (b))|(ecx ^ (c))))
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/*
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* In early loading microcode phase on BSP, boot_cpu_data is not set up yet.
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* x86_vendor() gets vendor id for BSP.
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*
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* In 32 bit AP case, accessing boot_cpu_data needs linear address. To simplify
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* coding, we still use x86_vendor() to get vendor id for AP.
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*
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* x86_vendor() gets vendor information directly from CPUID.
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*/
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static inline int x86_vendor(void)
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{
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u32 eax = 0x00000000;
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u32 ebx, ecx = 0, edx;
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native_cpuid(&eax, &ebx, &ecx, &edx);
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if (CPUID_IS(CPUID_INTEL1, CPUID_INTEL2, CPUID_INTEL3, ebx, ecx, edx))
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return X86_VENDOR_INTEL;
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if (CPUID_IS(CPUID_AMD1, CPUID_AMD2, CPUID_AMD3, ebx, ecx, edx))
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return X86_VENDOR_AMD;
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return X86_VENDOR_UNKNOWN;
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}
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static inline unsigned int __x86_family(unsigned int sig)
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{
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unsigned int x86;
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x86 = (sig >> 8) & 0xf;
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if (x86 == 0xf)
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x86 += (sig >> 20) & 0xff;
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return x86;
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}
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static inline unsigned int x86_family(void)
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{
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u32 eax = 0x00000001;
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u32 ebx, ecx = 0, edx;
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native_cpuid(&eax, &ebx, &ecx, &edx);
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return __x86_family(eax);
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}
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static inline unsigned int x86_model(unsigned int sig)
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{
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unsigned int x86, model;
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x86 = __x86_family(sig);
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model = (sig >> 4) & 0xf;
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if (x86 == 0x6 || x86 == 0xf)
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model += ((sig >> 16) & 0xf) << 4;
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return model;
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}
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extern void __init load_ucode_bsp(void);
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extern void load_ucode_ap(void);
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extern int __init save_microcode_in_initrd(void);
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void reload_early_microcode(void);
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#else
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static inline void __init load_ucode_bsp(void) {}
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static inline void load_ucode_ap(void) {}
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static inline int __init save_microcode_in_initrd(void)
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{
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return 0;
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}
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static inline void reload_early_microcode(void) {}
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#endif
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#endif /* _ASM_X86_MICROCODE_H */
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