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The first part of the scrubbing of the intel early microcode loader.
There's more work to come but let's unload this pile first. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJU9LsjAAoJEBLB8Bhh3lVKVIMP/0xUfRb/wV8P+HtJ6St41G8/ OygkO/D4UJcZiZP2xrxNix5/waExpegtEIqJPbO6Wlyq0N+0imCZxcsPsgmdw2Zo CQv6eu4p0on/v8EUFTJV9+ZHqs6zhch1tNQMfLuq+nXH7f8okSzbDL25RWoo8QU5 qOOHhHwjyQzivC1KpEodwVte1nT/KLNFio3moRwONKM0/1xCBHyvK4us6QqifWow hsDnVNdoXqTzqhY43u7zxNcSzo/RMCq/4sc90augdCdZFAVbKzPGM0o0Pq5FQTmv MbMuGF80LhfMFln0tBv30IGFuEc54BBD/x3d7YYadyeX0jIE4T27Pe4xbVLoTDTM T8PnaNn/sUyiBUGYO5ff5niMwzpqnuwgKi3wSe4fJ0HIHVE/SAHQogoomP1EKb59 n66RTWV5eE9KkzdZCTdXhm8aalLK8QfbSlElOrbqwr7/qfFslNpnNUzRwhaHoN1k kk5PJ8PipZR/YmWapIU7K6lEZQoRixAb+StMiOvX5n++d+Z7d2/Mu3UqebpqlvUc nVFpbPpB9FuH0XQPfICQEUvfWf+MTP9cPw5OkMu+Zo4ok8fIt7MdHCtQJVa9d0R/ 3ZMc9daDgwU8bEYoMRn6xHSGaUjtyO6AUeFhDM7b7If9YWDg59H7nufa5ySkM5KB xhWDhQYiSjhdvToKKF/e =Jlz9 -----END PGP SIGNATURE----- Merge tag 'intel_microcode_cleanup_p1' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp into x86/microcode Pull x86 microcode loader code cleanups from Borislav Petkov: "The first part of the scrubbing of the intel early microcode loader. There's more work to come but let's unload this pile first." Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar
commit
25efdcb43c
@ -75,6 +75,79 @@ static inline void __exit exit_amd_microcode(void) {}
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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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@ -56,12 +56,15 @@ struct extended_sigtable {
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#define exttable_size(et) ((et)->count * EXT_SIGNATURE_SIZE + EXT_HEADER_SIZE)
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extern int
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get_matching_microcode(unsigned int csig, int cpf, void *mc, int rev);
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extern int get_matching_microcode(unsigned int csig, int cpf, int rev, void *mc);
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extern int microcode_sanity_check(void *mc, int print_err);
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extern int get_matching_sig(unsigned int csig, int cpf, void *mc, int rev);
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extern int
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update_match_revision(struct microcode_header_intel *mc_header, int rev);
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extern int get_matching_sig(unsigned int csig, int cpf, int rev, void *mc);
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static inline int
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revision_is_newer(struct microcode_header_intel *mc_header, int rev)
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{
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return (mc_header->rev <= rev) ? 0 : 1;
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}
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#ifdef CONFIG_MICROCODE_INTEL_EARLY
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extern void __init load_ucode_intel_bsp(void);
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@ -23,57 +23,6 @@
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#include <asm/processor.h>
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#include <asm/cmdline.h>
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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 through cpuid.
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*/
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static 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 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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int x86;
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native_cpuid(&eax, &ebx, &ecx, &edx);
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x86 = (eax >> 8) & 0xf;
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if (x86 == 15)
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x86 += (eax >> 20) & 0xff;
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return x86;
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}
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static bool __init check_loader_disabled_bsp(void)
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{
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#ifdef CONFIG_X86_32
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@ -96,7 +45,7 @@ static bool __init check_loader_disabled_bsp(void)
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void __init load_ucode_bsp(void)
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{
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int vendor, x86;
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int vendor, family;
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if (check_loader_disabled_bsp())
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return;
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@ -105,15 +54,15 @@ void __init load_ucode_bsp(void)
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return;
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vendor = x86_vendor();
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x86 = x86_family();
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family = x86_family();
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switch (vendor) {
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case X86_VENDOR_INTEL:
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if (x86 >= 6)
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if (family >= 6)
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load_ucode_intel_bsp();
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break;
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case X86_VENDOR_AMD:
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if (x86 >= 0x10)
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if (family >= 0x10)
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load_ucode_amd_bsp();
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break;
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default:
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@ -132,7 +81,7 @@ static bool check_loader_disabled_ap(void)
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void load_ucode_ap(void)
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{
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int vendor, x86;
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int vendor, family;
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if (check_loader_disabled_ap())
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return;
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@ -141,15 +90,15 @@ void load_ucode_ap(void)
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return;
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vendor = x86_vendor();
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x86 = x86_family();
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family = x86_family();
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switch (vendor) {
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case X86_VENDOR_INTEL:
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if (x86 >= 6)
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if (family >= 6)
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load_ucode_intel_ap();
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break;
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case X86_VENDOR_AMD:
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if (x86 >= 0x10)
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if (family >= 0x10)
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load_ucode_amd_ap();
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break;
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default:
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@ -179,18 +128,18 @@ int __init save_microcode_in_initrd(void)
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void reload_early_microcode(void)
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{
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int vendor, x86;
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int vendor, family;
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vendor = x86_vendor();
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x86 = x86_family();
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family = x86_family();
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switch (vendor) {
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case X86_VENDOR_INTEL:
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if (x86 >= 6)
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if (family >= 6)
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reload_ucode_intel();
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break;
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case X86_VENDOR_AMD:
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if (x86 >= 0x10)
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if (family >= 0x10)
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reload_ucode_amd();
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break;
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default:
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@ -124,7 +124,7 @@ static int get_matching_mc(struct microcode_intel *mc_intel, int cpu)
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cpf = cpu_sig.pf;
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crev = cpu_sig.rev;
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return get_matching_microcode(csig, cpf, mc_intel, crev);
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return get_matching_microcode(csig, cpf, crev, mc_intel);
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}
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static int apply_microcode_intel(int cpu)
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@ -226,7 +226,7 @@ static enum ucode_state generic_load_microcode(int cpu, void *data, size_t size,
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csig = uci->cpu_sig.sig;
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cpf = uci->cpu_sig.pf;
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if (get_matching_microcode(csig, cpf, mc, new_rev)) {
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if (get_matching_microcode(csig, cpf, new_rev, mc)) {
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vfree(new_mc);
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new_rev = mc_header.rev;
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new_mc = mc;
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@ -16,6 +16,14 @@
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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/*
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* This needs to be before all headers so that pr_debug in printk.h doesn't turn
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* printk calls into no_printk().
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*
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*#define DEBUG
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*/
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#include <linux/module.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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@ -28,6 +36,9 @@
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#include <asm/tlbflush.h>
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#include <asm/setup.h>
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#undef pr_fmt
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#define pr_fmt(fmt) "microcode: " fmt
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static unsigned long mc_saved_in_initrd[MAX_UCODE_COUNT];
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static struct mc_saved_data {
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unsigned int mc_saved_count;
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@ -35,50 +46,45 @@ static struct mc_saved_data {
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} mc_saved_data;
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static enum ucode_state
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generic_load_microcode_early(struct microcode_intel **mc_saved_p,
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unsigned int mc_saved_count,
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struct ucode_cpu_info *uci)
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load_microcode_early(struct microcode_intel **saved,
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unsigned int num_saved, struct ucode_cpu_info *uci)
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{
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struct microcode_intel *ucode_ptr, *new_mc = NULL;
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int new_rev = uci->cpu_sig.rev;
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enum ucode_state state = UCODE_OK;
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unsigned int mc_size;
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struct microcode_header_intel *mc_header;
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unsigned int csig = uci->cpu_sig.sig;
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unsigned int cpf = uci->cpu_sig.pf;
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int i;
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struct microcode_header_intel *mc_hdr;
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int new_rev, ret, i;
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for (i = 0; i < mc_saved_count; i++) {
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ucode_ptr = mc_saved_p[i];
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new_rev = uci->cpu_sig.rev;
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mc_header = (struct microcode_header_intel *)ucode_ptr;
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mc_size = get_totalsize(mc_header);
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if (get_matching_microcode(csig, cpf, ucode_ptr, new_rev)) {
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new_rev = mc_header->rev;
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new_mc = ucode_ptr;
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}
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for (i = 0; i < num_saved; i++) {
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ucode_ptr = saved[i];
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mc_hdr = (struct microcode_header_intel *)ucode_ptr;
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ret = get_matching_microcode(uci->cpu_sig.sig,
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uci->cpu_sig.pf,
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new_rev,
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ucode_ptr);
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if (!ret)
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continue;
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new_rev = mc_hdr->rev;
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new_mc = ucode_ptr;
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}
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if (!new_mc) {
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state = UCODE_NFOUND;
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goto out;
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}
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if (!new_mc)
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return UCODE_NFOUND;
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uci->mc = (struct microcode_intel *)new_mc;
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out:
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return state;
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return UCODE_OK;
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}
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static void
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microcode_pointer(struct microcode_intel **mc_saved,
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unsigned long *mc_saved_in_initrd,
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unsigned long initrd_start, int mc_saved_count)
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static inline void
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copy_initrd_ptrs(struct microcode_intel **mc_saved, unsigned long *initrd,
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unsigned long off, int num_saved)
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{
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int i;
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|
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for (i = 0; i < mc_saved_count; i++)
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mc_saved[i] = (struct microcode_intel *)
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(mc_saved_in_initrd[i] + initrd_start);
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for (i = 0; i < num_saved; i++)
|
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mc_saved[i] = (struct microcode_intel *)(initrd[i] + off);
|
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}
|
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|
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#ifdef CONFIG_X86_32
|
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@ -102,55 +108,27 @@ microcode_phys(struct microcode_intel **mc_saved_tmp,
|
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#endif
|
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|
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static enum ucode_state
|
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load_microcode(struct mc_saved_data *mc_saved_data,
|
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unsigned long *mc_saved_in_initrd,
|
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unsigned long initrd_start,
|
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struct ucode_cpu_info *uci)
|
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load_microcode(struct mc_saved_data *mc_saved_data, unsigned long *initrd,
|
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unsigned long initrd_start, struct ucode_cpu_info *uci)
|
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{
|
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struct microcode_intel *mc_saved_tmp[MAX_UCODE_COUNT];
|
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unsigned int count = mc_saved_data->mc_saved_count;
|
||||
|
||||
if (!mc_saved_data->mc_saved) {
|
||||
microcode_pointer(mc_saved_tmp, mc_saved_in_initrd,
|
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initrd_start, count);
|
||||
copy_initrd_ptrs(mc_saved_tmp, initrd, initrd_start, count);
|
||||
|
||||
return generic_load_microcode_early(mc_saved_tmp, count, uci);
|
||||
return load_microcode_early(mc_saved_tmp, count, uci);
|
||||
} else {
|
||||
#ifdef CONFIG_X86_32
|
||||
microcode_phys(mc_saved_tmp, mc_saved_data);
|
||||
return generic_load_microcode_early(mc_saved_tmp, count, uci);
|
||||
return load_microcode_early(mc_saved_tmp, count, uci);
|
||||
#else
|
||||
return generic_load_microcode_early(mc_saved_data->mc_saved,
|
||||
return load_microcode_early(mc_saved_data->mc_saved,
|
||||
count, uci);
|
||||
#endif
|
||||
}
|
||||
}
|
||||
|
||||
static u8 get_x86_family(unsigned long sig)
|
||||
{
|
||||
u8 x86;
|
||||
|
||||
x86 = (sig >> 8) & 0xf;
|
||||
|
||||
if (x86 == 0xf)
|
||||
x86 += (sig >> 20) & 0xff;
|
||||
|
||||
return x86;
|
||||
}
|
||||
|
||||
static u8 get_x86_model(unsigned long sig)
|
||||
{
|
||||
u8 x86, x86_model;
|
||||
|
||||
x86 = get_x86_family(sig);
|
||||
x86_model = (sig >> 4) & 0xf;
|
||||
|
||||
if (x86 == 0x6 || x86 == 0xf)
|
||||
x86_model += ((sig >> 16) & 0xf) << 4;
|
||||
|
||||
return x86_model;
|
||||
}
|
||||
|
||||
/*
|
||||
* Given CPU signature and a microcode patch, this function finds if the
|
||||
* microcode patch has matching family and model with the CPU.
|
||||
@ -159,42 +137,40 @@ static enum ucode_state
|
||||
matching_model_microcode(struct microcode_header_intel *mc_header,
|
||||
unsigned long sig)
|
||||
{
|
||||
u8 x86, x86_model;
|
||||
u8 x86_ucode, x86_model_ucode;
|
||||
unsigned int fam, model;
|
||||
unsigned int fam_ucode, model_ucode;
|
||||
struct extended_sigtable *ext_header;
|
||||
unsigned long total_size = get_totalsize(mc_header);
|
||||
unsigned long data_size = get_datasize(mc_header);
|
||||
int ext_sigcount, i;
|
||||
struct extended_signature *ext_sig;
|
||||
|
||||
x86 = get_x86_family(sig);
|
||||
x86_model = get_x86_model(sig);
|
||||
fam = __x86_family(sig);
|
||||
model = x86_model(sig);
|
||||
|
||||
x86_ucode = get_x86_family(mc_header->sig);
|
||||
x86_model_ucode = get_x86_model(mc_header->sig);
|
||||
fam_ucode = __x86_family(mc_header->sig);
|
||||
model_ucode = x86_model(mc_header->sig);
|
||||
|
||||
if (x86 == x86_ucode && x86_model == x86_model_ucode)
|
||||
if (fam == fam_ucode && model == model_ucode)
|
||||
return UCODE_OK;
|
||||
|
||||
/* Look for ext. headers: */
|
||||
if (total_size <= data_size + MC_HEADER_SIZE)
|
||||
return UCODE_NFOUND;
|
||||
|
||||
ext_header = (struct extended_sigtable *)
|
||||
mc_header + data_size + MC_HEADER_SIZE;
|
||||
ext_header = (void *) mc_header + data_size + MC_HEADER_SIZE;
|
||||
ext_sig = (void *)ext_header + EXT_HEADER_SIZE;
|
||||
ext_sigcount = ext_header->count;
|
||||
ext_sig = (void *)ext_header + EXT_HEADER_SIZE;
|
||||
|
||||
for (i = 0; i < ext_sigcount; i++) {
|
||||
x86_ucode = get_x86_family(ext_sig->sig);
|
||||
x86_model_ucode = get_x86_model(ext_sig->sig);
|
||||
fam_ucode = __x86_family(ext_sig->sig);
|
||||
model_ucode = x86_model(ext_sig->sig);
|
||||
|
||||
if (x86 == x86_ucode && x86_model == x86_model_ucode)
|
||||
if (fam == fam_ucode && model == model_ucode)
|
||||
return UCODE_OK;
|
||||
|
||||
ext_sig++;
|
||||
}
|
||||
|
||||
return UCODE_NFOUND;
|
||||
}
|
||||
|
||||
@ -204,7 +180,7 @@ save_microcode(struct mc_saved_data *mc_saved_data,
|
||||
unsigned int mc_saved_count)
|
||||
{
|
||||
int i, j;
|
||||
struct microcode_intel **mc_saved_p;
|
||||
struct microcode_intel **saved_ptr;
|
||||
int ret;
|
||||
|
||||
if (!mc_saved_count)
|
||||
@ -213,39 +189,45 @@ save_microcode(struct mc_saved_data *mc_saved_data,
|
||||
/*
|
||||
* Copy new microcode data.
|
||||
*/
|
||||
mc_saved_p = kmalloc(mc_saved_count*sizeof(struct microcode_intel *),
|
||||
GFP_KERNEL);
|
||||
if (!mc_saved_p)
|
||||
saved_ptr = kcalloc(mc_saved_count, sizeof(struct microcode_intel *), GFP_KERNEL);
|
||||
if (!saved_ptr)
|
||||
return -ENOMEM;
|
||||
|
||||
for (i = 0; i < mc_saved_count; i++) {
|
||||
struct microcode_intel *mc = mc_saved_src[i];
|
||||
struct microcode_header_intel *mc_header = &mc->hdr;
|
||||
unsigned long mc_size = get_totalsize(mc_header);
|
||||
mc_saved_p[i] = kmalloc(mc_size, GFP_KERNEL);
|
||||
if (!mc_saved_p[i]) {
|
||||
ret = -ENOMEM;
|
||||
goto err;
|
||||
}
|
||||
struct microcode_header_intel *mc_hdr;
|
||||
struct microcode_intel *mc;
|
||||
unsigned long size;
|
||||
|
||||
if (!mc_saved_src[i]) {
|
||||
ret = -EINVAL;
|
||||
goto err;
|
||||
}
|
||||
memcpy(mc_saved_p[i], mc, mc_size);
|
||||
|
||||
mc = mc_saved_src[i];
|
||||
mc_hdr = &mc->hdr;
|
||||
size = get_totalsize(mc_hdr);
|
||||
|
||||
saved_ptr[i] = kmalloc(size, GFP_KERNEL);
|
||||
if (!saved_ptr[i]) {
|
||||
ret = -ENOMEM;
|
||||
goto err;
|
||||
}
|
||||
|
||||
memcpy(saved_ptr[i], mc, size);
|
||||
}
|
||||
|
||||
/*
|
||||
* Point to newly saved microcode.
|
||||
*/
|
||||
mc_saved_data->mc_saved = mc_saved_p;
|
||||
mc_saved_data->mc_saved = saved_ptr;
|
||||
mc_saved_data->mc_saved_count = mc_saved_count;
|
||||
|
||||
return 0;
|
||||
|
||||
err:
|
||||
for (j = 0; j <= i; j++)
|
||||
kfree(mc_saved_p[j]);
|
||||
kfree(mc_saved_p);
|
||||
kfree(saved_ptr[j]);
|
||||
kfree(saved_ptr);
|
||||
|
||||
return ret;
|
||||
}
|
||||
@ -257,48 +239,45 @@ err:
|
||||
* - or if it is a newly discovered microcode patch.
|
||||
*
|
||||
* The microcode patch should have matching model with CPU.
|
||||
*
|
||||
* Returns: The updated number @num_saved of saved microcode patches.
|
||||
*/
|
||||
static void _save_mc(struct microcode_intel **mc_saved, u8 *ucode_ptr,
|
||||
unsigned int *mc_saved_count_p)
|
||||
static unsigned int _save_mc(struct microcode_intel **mc_saved,
|
||||
u8 *ucode_ptr, unsigned int num_saved)
|
||||
{
|
||||
int i;
|
||||
int found = 0;
|
||||
unsigned int mc_saved_count = *mc_saved_count_p;
|
||||
struct microcode_header_intel *mc_header;
|
||||
struct microcode_header_intel *mc_hdr, *mc_saved_hdr;
|
||||
unsigned int sig, pf, new_rev;
|
||||
int found = 0, i;
|
||||
|
||||
mc_header = (struct microcode_header_intel *)ucode_ptr;
|
||||
for (i = 0; i < mc_saved_count; i++) {
|
||||
unsigned int sig, pf;
|
||||
unsigned int new_rev;
|
||||
struct microcode_header_intel *mc_saved_header =
|
||||
(struct microcode_header_intel *)mc_saved[i];
|
||||
sig = mc_saved_header->sig;
|
||||
pf = mc_saved_header->pf;
|
||||
new_rev = mc_header->rev;
|
||||
mc_hdr = (struct microcode_header_intel *)ucode_ptr;
|
||||
|
||||
for (i = 0; i < num_saved; i++) {
|
||||
mc_saved_hdr = (struct microcode_header_intel *)mc_saved[i];
|
||||
sig = mc_saved_hdr->sig;
|
||||
pf = mc_saved_hdr->pf;
|
||||
new_rev = mc_hdr->rev;
|
||||
|
||||
if (!get_matching_sig(sig, pf, new_rev, ucode_ptr))
|
||||
continue;
|
||||
|
||||
found = 1;
|
||||
|
||||
if (!revision_is_newer(mc_hdr, new_rev))
|
||||
continue;
|
||||
|
||||
if (get_matching_sig(sig, pf, ucode_ptr, new_rev)) {
|
||||
found = 1;
|
||||
if (update_match_revision(mc_header, new_rev)) {
|
||||
/*
|
||||
* Found an older ucode saved before.
|
||||
* Replace the older one with this newer
|
||||
* one.
|
||||
*/
|
||||
mc_saved[i] =
|
||||
(struct microcode_intel *)ucode_ptr;
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
if (i >= mc_saved_count && !found)
|
||||
/*
|
||||
* This ucode is first time discovered in ucode file.
|
||||
* Save it to memory.
|
||||
* Found an older ucode saved earlier. Replace it with
|
||||
* this newer one.
|
||||
*/
|
||||
mc_saved[mc_saved_count++] =
|
||||
(struct microcode_intel *)ucode_ptr;
|
||||
mc_saved[i] = (struct microcode_intel *)ucode_ptr;
|
||||
break;
|
||||
}
|
||||
|
||||
*mc_saved_count_p = mc_saved_count;
|
||||
/* Newly detected microcode, save it to memory. */
|
||||
if (i >= num_saved && !found)
|
||||
mc_saved[num_saved++] = (struct microcode_intel *)ucode_ptr;
|
||||
|
||||
return num_saved;
|
||||
}
|
||||
|
||||
/*
|
||||
@ -346,7 +325,7 @@ get_matching_model_microcode(int cpu, unsigned long start,
|
||||
continue;
|
||||
}
|
||||
|
||||
_save_mc(mc_saved_tmp, ucode_ptr, &mc_saved_count);
|
||||
mc_saved_count = _save_mc(mc_saved_tmp, ucode_ptr, mc_saved_count);
|
||||
|
||||
ucode_ptr += mc_size;
|
||||
}
|
||||
@ -372,7 +351,7 @@ out:
|
||||
static int collect_cpu_info_early(struct ucode_cpu_info *uci)
|
||||
{
|
||||
unsigned int val[2];
|
||||
u8 x86, x86_model;
|
||||
unsigned int family, model;
|
||||
struct cpu_signature csig;
|
||||
unsigned int eax, ebx, ecx, edx;
|
||||
|
||||
@ -387,10 +366,10 @@ static int collect_cpu_info_early(struct ucode_cpu_info *uci)
|
||||
native_cpuid(&eax, &ebx, &ecx, &edx);
|
||||
csig.sig = eax;
|
||||
|
||||
x86 = get_x86_family(csig.sig);
|
||||
x86_model = get_x86_model(csig.sig);
|
||||
family = __x86_family(csig.sig);
|
||||
model = x86_model(csig.sig);
|
||||
|
||||
if ((x86_model >= 5) || (x86 > 6)) {
|
||||
if ((model >= 5) || (family > 6)) {
|
||||
/* get processor flags from MSR 0x17 */
|
||||
native_rdmsr(MSR_IA32_PLATFORM_ID, val[0], val[1]);
|
||||
csig.pf = 1 << ((val[1] >> 18) & 7);
|
||||
@ -429,8 +408,7 @@ static void __ref show_saved_mc(void)
|
||||
sig = uci.cpu_sig.sig;
|
||||
pf = uci.cpu_sig.pf;
|
||||
rev = uci.cpu_sig.rev;
|
||||
pr_debug("CPU%d: sig=0x%x, pf=0x%x, rev=0x%x\n",
|
||||
smp_processor_id(), sig, pf, rev);
|
||||
pr_debug("CPU: sig=0x%x, pf=0x%x, rev=0x%x\n", sig, pf, rev);
|
||||
|
||||
for (i = 0; i < mc_saved_data.mc_saved_count; i++) {
|
||||
struct microcode_header_intel *mc_saved_header;
|
||||
@ -457,8 +435,7 @@ static void __ref show_saved_mc(void)
|
||||
if (total_size <= data_size + MC_HEADER_SIZE)
|
||||
continue;
|
||||
|
||||
ext_header = (struct extended_sigtable *)
|
||||
mc_saved_header + data_size + MC_HEADER_SIZE;
|
||||
ext_header = (void *) mc_saved_header + data_size + MC_HEADER_SIZE;
|
||||
ext_sigcount = ext_header->count;
|
||||
ext_sig = (void *)ext_header + EXT_HEADER_SIZE;
|
||||
|
||||
@ -515,8 +492,7 @@ int save_mc_for_early(u8 *mc)
|
||||
* Save the microcode patch mc in mc_save_tmp structure if it's a newer
|
||||
* version.
|
||||
*/
|
||||
|
||||
_save_mc(mc_saved_tmp, mc, &mc_saved_count);
|
||||
mc_saved_count = _save_mc(mc_saved_tmp, mc, mc_saved_count);
|
||||
|
||||
/*
|
||||
* Save the mc_save_tmp in global mc_saved_data.
|
||||
@ -548,12 +524,10 @@ EXPORT_SYMBOL_GPL(save_mc_for_early);
|
||||
|
||||
static __initdata char ucode_name[] = "kernel/x86/microcode/GenuineIntel.bin";
|
||||
static __init enum ucode_state
|
||||
scan_microcode(unsigned long start, unsigned long end,
|
||||
struct mc_saved_data *mc_saved_data,
|
||||
unsigned long *mc_saved_in_initrd,
|
||||
struct ucode_cpu_info *uci)
|
||||
scan_microcode(struct mc_saved_data *mc_saved_data, unsigned long *initrd,
|
||||
unsigned long start, unsigned long size,
|
||||
struct ucode_cpu_info *uci)
|
||||
{
|
||||
unsigned int size = end - start + 1;
|
||||
struct cpio_data cd;
|
||||
long offset = 0;
|
||||
#ifdef CONFIG_X86_32
|
||||
@ -569,10 +543,8 @@ scan_microcode(unsigned long start, unsigned long end,
|
||||
if (!cd.data)
|
||||
return UCODE_ERROR;
|
||||
|
||||
|
||||
return get_matching_model_microcode(0, start, cd.data, cd.size,
|
||||
mc_saved_data, mc_saved_in_initrd,
|
||||
uci);
|
||||
mc_saved_data, initrd, uci);
|
||||
}
|
||||
|
||||
/*
|
||||
@ -704,7 +676,7 @@ int __init save_microcode_in_initrd_intel(void)
|
||||
if (count == 0)
|
||||
return ret;
|
||||
|
||||
microcode_pointer(mc_saved, mc_saved_in_initrd, initrd_start, count);
|
||||
copy_initrd_ptrs(mc_saved, mc_saved_in_initrd, initrd_start, count);
|
||||
ret = save_microcode(&mc_saved_data, mc_saved, count);
|
||||
if (ret)
|
||||
pr_err("Cannot save microcode patches from initrd.\n");
|
||||
@ -716,52 +688,44 @@ int __init save_microcode_in_initrd_intel(void)
|
||||
|
||||
static void __init
|
||||
_load_ucode_intel_bsp(struct mc_saved_data *mc_saved_data,
|
||||
unsigned long *mc_saved_in_initrd,
|
||||
unsigned long initrd_start_early,
|
||||
unsigned long initrd_end_early,
|
||||
struct ucode_cpu_info *uci)
|
||||
unsigned long *initrd,
|
||||
unsigned long start, unsigned long size)
|
||||
{
|
||||
struct ucode_cpu_info uci;
|
||||
enum ucode_state ret;
|
||||
|
||||
collect_cpu_info_early(uci);
|
||||
scan_microcode(initrd_start_early, initrd_end_early, mc_saved_data,
|
||||
mc_saved_in_initrd, uci);
|
||||
collect_cpu_info_early(&uci);
|
||||
|
||||
ret = load_microcode(mc_saved_data, mc_saved_in_initrd,
|
||||
initrd_start_early, uci);
|
||||
ret = scan_microcode(mc_saved_data, initrd, start, size, &uci);
|
||||
if (ret != UCODE_OK)
|
||||
return;
|
||||
|
||||
if (ret == UCODE_OK)
|
||||
apply_microcode_early(uci, true);
|
||||
ret = load_microcode(mc_saved_data, initrd, start, &uci);
|
||||
if (ret != UCODE_OK)
|
||||
return;
|
||||
|
||||
apply_microcode_early(&uci, true);
|
||||
}
|
||||
|
||||
void __init
|
||||
load_ucode_intel_bsp(void)
|
||||
void __init load_ucode_intel_bsp(void)
|
||||
{
|
||||
u64 ramdisk_image, ramdisk_size;
|
||||
unsigned long initrd_start_early, initrd_end_early;
|
||||
struct ucode_cpu_info uci;
|
||||
u64 start, size;
|
||||
#ifdef CONFIG_X86_32
|
||||
struct boot_params *boot_params_p;
|
||||
struct boot_params *p;
|
||||
|
||||
boot_params_p = (struct boot_params *)__pa_nodebug(&boot_params);
|
||||
ramdisk_image = boot_params_p->hdr.ramdisk_image;
|
||||
ramdisk_size = boot_params_p->hdr.ramdisk_size;
|
||||
initrd_start_early = ramdisk_image;
|
||||
initrd_end_early = initrd_start_early + ramdisk_size;
|
||||
p = (struct boot_params *)__pa_nodebug(&boot_params);
|
||||
start = p->hdr.ramdisk_image;
|
||||
size = p->hdr.ramdisk_size;
|
||||
|
||||
_load_ucode_intel_bsp(
|
||||
(struct mc_saved_data *)__pa_nodebug(&mc_saved_data),
|
||||
(unsigned long *)__pa_nodebug(&mc_saved_in_initrd),
|
||||
initrd_start_early, initrd_end_early, &uci);
|
||||
(struct mc_saved_data *)__pa_nodebug(&mc_saved_data),
|
||||
(unsigned long *)__pa_nodebug(&mc_saved_in_initrd),
|
||||
start, size);
|
||||
#else
|
||||
ramdisk_image = boot_params.hdr.ramdisk_image;
|
||||
ramdisk_size = boot_params.hdr.ramdisk_size;
|
||||
initrd_start_early = ramdisk_image + PAGE_OFFSET;
|
||||
initrd_end_early = initrd_start_early + ramdisk_size;
|
||||
start = boot_params.hdr.ramdisk_image + PAGE_OFFSET;
|
||||
size = boot_params.hdr.ramdisk_size;
|
||||
|
||||
_load_ucode_intel_bsp(&mc_saved_data, mc_saved_in_initrd,
|
||||
initrd_start_early, initrd_end_early,
|
||||
&uci);
|
||||
_load_ucode_intel_bsp(&mc_saved_data, mc_saved_in_initrd, start, size);
|
||||
#endif
|
||||
}
|
||||
|
||||
@ -771,6 +735,7 @@ void load_ucode_intel_ap(void)
|
||||
struct ucode_cpu_info uci;
|
||||
unsigned long *mc_saved_in_initrd_p;
|
||||
unsigned long initrd_start_addr;
|
||||
enum ucode_state ret;
|
||||
#ifdef CONFIG_X86_32
|
||||
unsigned long *initrd_start_p;
|
||||
|
||||
@ -793,8 +758,12 @@ void load_ucode_intel_ap(void)
|
||||
return;
|
||||
|
||||
collect_cpu_info_early(&uci);
|
||||
load_microcode(mc_saved_data_p, mc_saved_in_initrd_p,
|
||||
initrd_start_addr, &uci);
|
||||
ret = load_microcode(mc_saved_data_p, mc_saved_in_initrd_p,
|
||||
initrd_start_addr, &uci);
|
||||
|
||||
if (ret != UCODE_OK)
|
||||
return;
|
||||
|
||||
apply_microcode_early(&uci, true);
|
||||
}
|
||||
|
||||
@ -808,8 +777,8 @@ void reload_ucode_intel(void)
|
||||
|
||||
collect_cpu_info_early(&uci);
|
||||
|
||||
ret = generic_load_microcode_early(mc_saved_data.mc_saved,
|
||||
mc_saved_data.mc_saved_count, &uci);
|
||||
ret = load_microcode_early(mc_saved_data.mc_saved,
|
||||
mc_saved_data.mc_saved_count, &uci);
|
||||
if (ret != UCODE_OK)
|
||||
return;
|
||||
|
||||
|
||||
@ -38,12 +38,6 @@ update_match_cpu(unsigned int csig, unsigned int cpf,
|
||||
return (!sigmatch(sig, csig, pf, cpf)) ? 0 : 1;
|
||||
}
|
||||
|
||||
int
|
||||
update_match_revision(struct microcode_header_intel *mc_header, int rev)
|
||||
{
|
||||
return (mc_header->rev <= rev) ? 0 : 1;
|
||||
}
|
||||
|
||||
int microcode_sanity_check(void *mc, int print_err)
|
||||
{
|
||||
unsigned long total_size, data_size, ext_table_size;
|
||||
@ -128,10 +122,9 @@ int microcode_sanity_check(void *mc, int print_err)
|
||||
EXPORT_SYMBOL_GPL(microcode_sanity_check);
|
||||
|
||||
/*
|
||||
* return 0 - no update found
|
||||
* return 1 - found update
|
||||
* Returns 1 if update has been found, 0 otherwise.
|
||||
*/
|
||||
int get_matching_sig(unsigned int csig, int cpf, void *mc, int rev)
|
||||
int get_matching_sig(unsigned int csig, int cpf, int rev, void *mc)
|
||||
{
|
||||
struct microcode_header_intel *mc_header = mc;
|
||||
struct extended_sigtable *ext_header;
|
||||
@ -159,16 +152,15 @@ int get_matching_sig(unsigned int csig, int cpf, void *mc, int rev)
|
||||
}
|
||||
|
||||
/*
|
||||
* return 0 - no update found
|
||||
* return 1 - found update
|
||||
* Returns 1 if update has been found, 0 otherwise.
|
||||
*/
|
||||
int get_matching_microcode(unsigned int csig, int cpf, void *mc, int rev)
|
||||
int get_matching_microcode(unsigned int csig, int cpf, int rev, void *mc)
|
||||
{
|
||||
struct microcode_header_intel *mc_header = mc;
|
||||
struct microcode_header_intel *mc_hdr = mc;
|
||||
|
||||
if (!update_match_revision(mc_header, rev))
|
||||
if (!revision_is_newer(mc_hdr, rev))
|
||||
return 0;
|
||||
|
||||
return get_matching_sig(csig, cpf, mc, rev);
|
||||
return get_matching_sig(csig, cpf, rev, mc);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(get_matching_microcode);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user