diff options
author | Keir Fraser <keir.fraser@citrix.com> | 2008-09-16 11:26:19 +0100 |
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committer | Keir Fraser <keir.fraser@citrix.com> | 2008-09-16 11:26:19 +0100 |
commit | a55272716395603a9b836afa0c75c65551262cd2 (patch) | |
tree | 674002ad33a48e0188e6ff4abcace6b1c29eb0bc /xen/arch/x86/microcode_intel.c | |
parent | 689db5e9fbb77b9f968d4e8f47c26aea67faf1f3 (diff) | |
download | xen-a55272716395603a9b836afa0c75c65551262cd2.tar.gz xen-a55272716395603a9b836afa0c75c65551262cd2.tar.bz2 xen-a55272716395603a9b836afa0c75c65551262cd2.zip |
x86, microcode: Clean up for Xen coding style, and disable for now
(until allocations in irq context are fixed).
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
Diffstat (limited to 'xen/arch/x86/microcode_intel.c')
-rw-r--r-- | xen/arch/x86/microcode_intel.c | 648 |
1 files changed, 303 insertions, 345 deletions
diff --git a/xen/arch/x86/microcode_intel.c b/xen/arch/x86/microcode_intel.c index c97a695cf7..fe77af4a9a 100644 --- a/xen/arch/x86/microcode_intel.c +++ b/xen/arch/x86/microcode_intel.c @@ -1,73 +1,24 @@ /* - * Intel CPU Microcode Update Driver for Linux + * Intel CPU Microcode Update Driver for Linux * - * Copyright (C) 2000-2006 Tigran Aivazian <tigran@aivazian.fsnet.co.uk> - * 2006 Shaohua Li <shaohua.li@intel.com> * - * This driver allows to upgrade microcode on Intel processors - * belonging to IA-32 family - PentiumPro, Pentium II, - * Pentium III, Xeon, Pentium 4, etc. + * Copyright (C) 2000-2006 Tigran Aivazian <tigran@aivazian.fsnet.co.uk> + * 2006 Shaohua Li <shaohua.li@intel.com> * + * This driver allows to upgrade microcode on Intel processors + * belonging to IA-32 family - PentiumPro, Pentium II, + * Pentium III, Xeon, Pentium 4, etc. * - * Reference: Section 8.11 of Volume 3a, IA-32 Intel? Architecture - * Software Developer's Manual - * Order Number 253668 or free download from: + * Reference: Section 8.11 of Volume 3a, IA-32 Intel? Architecture + * Software Developer's Manual + * Order Number 253668 or free download from: * - * http://developer.intel.com/design/pentium4/manuals/253668.htm + * http://developer.intel.com/design/pentium4/manuals/253668.htm * - * For more information, go to http://www.urbanmyth.org/microcode + * For more information, go to http://www.urbanmyth.org/microcode * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * - * 1.0 16 Feb 2000, Tigran Aivazian <tigran@sco.com> - * Initial release. - * 1.01 18 Feb 2000, Tigran Aivazian <tigran@sco.com> - * Added read() support + cleanups. - * 1.02 21 Feb 2000, Tigran Aivazian <tigran@sco.com> - * Added 'device trimming' support. open(O_WRONLY) zeroes - * and frees the saved copy of applied microcode. - * 1.03 29 Feb 2000, Tigran Aivazian <tigran@sco.com> - * Made to use devfs (/dev/cpu/microcode) + cleanups. - * 1.04 06 Jun 2000, Simon Trimmer <simon@veritas.com> - * Added misc device support (now uses both devfs and misc). - * Added MICROCODE_IOCFREE ioctl to clear memory. - * 1.05 09 Jun 2000, Simon Trimmer <simon@veritas.com> - * Messages for error cases (non Intel & no suitable microcode). - * 1.06 03 Aug 2000, Tigran Aivazian <tigran@veritas.com> - * Removed ->release(). Removed exclusive open and status bitmap. - * Added microcode_rwsem to serialize read()/write()/ioctl(). - * Removed global kernel lock usage. - * 1.07 07 Sep 2000, Tigran Aivazian <tigran@veritas.com> - * Write 0 to 0x8B msr and then cpuid before reading revision, - * so that it works even if there were no update done by the - * BIOS. Otherwise, reading from 0x8B gives junk (which happened - * to be 0 on my machine which is why it worked even when I - * disabled update by the BIOS) - * Thanks to Eric W. Biederman <ebiederman@lnxi.com> for the fix. - * 1.08 11 Dec 2000, Richard Schaal <richard.schaal@intel.com> and - * Tigran Aivazian <tigran@veritas.com> - * Intel Pentium 4 processor support and bugfixes. - * 1.09 30 Oct 2001, Tigran Aivazian <tigran@veritas.com> - * Bugfix for HT (Hyper-Threading) enabled processors - * whereby processor resources are shared by all logical processors - * in a single CPU package. - * 1.10 28 Feb 2002 Asit K Mallick <asit.k.mallick@intel.com> and - * Tigran Aivazian <tigran@veritas.com>, - * Serialize updates as required on HT processors due to - * speculative nature of implementation. - * 1.11 22 Mar 2002 Tigran Aivazian <tigran@veritas.com> - * Fix the panic when writing zero-length microcode chunk. - * 1.12 29 Sep 2003 Nitin Kamble <nitin.a.kamble@intel.com>, - * Jun Nakajima <jun.nakajima@intel.com> - * Support for the microcode updates in the new format. - * 1.13 10 Oct 2003 Tigran Aivazian <tigran@veritas.com> - * Removed ->read() method and obsoleted MICROCODE_IOCFREE ioctl - * because we no longer hold a copy of applied microcode - * in kernel memory. - * 1.14 25 Jun 2004 Tigran Aivazian <tigran@veritas.com> - * Fix sigmatch() macro to handle old CPUs with pf == 0. - * Thanks to Stuart Swales for pointing out this bug. + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. */ #include <xen/config.h> @@ -84,35 +35,24 @@ #include <asm/microcode.h> #define pr_debug(x...) ((void)0) -#define DEFINE_MUTEX(_m) DEFINE_SPINLOCK(_m) -#define mutex_lock(_m) spin_lock(_m) -#define mutex_unlock(_m) spin_unlock(_m) -#define vmalloc(_s) xmalloc_bytes(_s) -#define vfree(_p) xfree(_p) - -#if 0 -MODULE_DESCRIPTION("Microcode Update Driver"); -MODULE_AUTHOR("Tigran Aivazian <tigran@aivazian.fsnet.co.uk>"); -MODULE_LICENSE("GPL"); -#endif - -#define DEFAULT_UCODE_DATASIZE (2000) -#define MC_HEADER_SIZE (sizeof(struct microcode_header_intel)) + +#define DEFAULT_UCODE_DATASIZE (2000) +#define MC_HEADER_SIZE (sizeof(struct microcode_header_intel)) #define DEFAULT_UCODE_TOTALSIZE (DEFAULT_UCODE_DATASIZE + MC_HEADER_SIZE) -#define EXT_HEADER_SIZE (sizeof(struct extended_sigtable)) -#define EXT_SIGNATURE_SIZE (sizeof(struct extended_signature)) -#define DWSIZE (sizeof(u32)) +#define EXT_HEADER_SIZE (sizeof(struct extended_sigtable)) +#define EXT_SIGNATURE_SIZE (sizeof(struct extended_signature)) +#define DWSIZE (sizeof(u32)) #define get_totalsize(mc) \ - (((struct microcode_intel *)mc)->hdr.totalsize ? \ - ((struct microcode_intel *)mc)->hdr.totalsize : \ - DEFAULT_UCODE_TOTALSIZE) + (((struct microcode_intel *)mc)->hdr.totalsize ? \ + ((struct microcode_intel *)mc)->hdr.totalsize : \ + DEFAULT_UCODE_TOTALSIZE) #define get_datasize(mc) \ - (((struct microcode_intel *)mc)->hdr.datasize ? \ - ((struct microcode_intel *)mc)->hdr.datasize : DEFAULT_UCODE_DATASIZE) + (((struct microcode_intel *)mc)->hdr.datasize ? \ + ((struct microcode_intel *)mc)->hdr.datasize : DEFAULT_UCODE_DATASIZE) #define sigmatch(s1, s2, p1, p2) \ - (((s1) == (s2)) && (((p1) & (p2)) || (((p1) == 0) && ((p2) == 0)))) + (((s1) == (s2)) && (((p1) & (p2)) || (((p1) == 0) && ((p2) == 0)))) #define exttable_size(et) ((et)->count * EXT_SIGNATURE_SIZE + EXT_HEADER_SIZE) @@ -121,125 +61,135 @@ static DEFINE_SPINLOCK(microcode_update_lock); static int collect_cpu_info(int cpu_num, struct cpu_signature *csig) { - struct cpuinfo_x86 *c = &cpu_data[cpu_num]; - unsigned int val[2]; - - memset(csig, 0, sizeof(*csig)); - - if (c->x86_vendor != X86_VENDOR_INTEL || c->x86 < 6 || - cpu_has(c, X86_FEATURE_IA64)) { - printk(KERN_ERR "microcode: CPU%d not a capable Intel " - "processor\n", cpu_num); - return -1; - } - - csig->sig = cpuid_eax(0x00000001); - - if ((c->x86_model >= 5) || (c->x86 > 6)) { - /* get processor flags from MSR 0x17 */ - rdmsr(MSR_IA32_PLATFORM_ID, val[0], val[1]); - csig->pf = 1 << ((val[1] >> 18) & 7); - } - - wrmsr(MSR_IA32_UCODE_REV, 0, 0); - /* see notes above for revision 1.07. Apparent chip bug */ - sync_core(); - /* get the current revision from MSR 0x8B */ - rdmsr(MSR_IA32_UCODE_REV, val[0], csig->rev); - pr_debug("microcode: collect_cpu_info : sig=0x%x, pf=0x%x, rev=0x%x\n", - csig->sig, csig->pf, csig->rev); - - return 0; + struct cpuinfo_x86 *c = &cpu_data[cpu_num]; + unsigned int val[2]; + + memset(csig, 0, sizeof(*csig)); + + if ( (c->x86_vendor != X86_VENDOR_INTEL) || (c->x86 < 6) || + cpu_has(c, X86_FEATURE_IA64) ) + { + printk(KERN_ERR "microcode: CPU%d not a capable Intel " + "processor\n", cpu_num); + return -1; + } + + csig->sig = cpuid_eax(0x00000001); + + if ( (c->x86_model >= 5) || (c->x86 > 6) ) + { + /* get processor flags from MSR 0x17 */ + rdmsr(MSR_IA32_PLATFORM_ID, val[0], val[1]); + csig->pf = 1 << ((val[1] >> 18) & 7); + } + + wrmsr(MSR_IA32_UCODE_REV, 0, 0); + /* see notes above for revision 1.07. Apparent chip bug */ + sync_core(); + /* get the current revision from MSR 0x8B */ + rdmsr(MSR_IA32_UCODE_REV, val[0], csig->rev); + pr_debug("microcode: collect_cpu_info : sig=0x%x, pf=0x%x, rev=0x%x\n", + csig->sig, csig->pf, csig->rev); + + return 0; } -static inline int microcode_update_match(int cpu_num, - struct microcode_header_intel *mc_header, int sig, int pf) +static inline int microcode_update_match( + int cpu_num, struct microcode_header_intel *mc_header, int sig, int pf) { - struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num; + struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num; - if (!sigmatch(sig, uci->cpu_sig.sig, pf, uci->cpu_sig.pf) - || mc_header->rev <= uci->cpu_sig.rev) - return 0; - return 1; + return (sigmatch(sig, uci->cpu_sig.sig, pf, uci->cpu_sig.pf) && + (mc_header->rev > uci->cpu_sig.rev)); } static int microcode_sanity_check(void *mc) { - struct microcode_header_intel *mc_header = mc; - struct extended_sigtable *ext_header = NULL; - struct extended_signature *ext_sig; - unsigned long total_size, data_size, ext_table_size; - int sum, orig_sum, ext_sigcount = 0, i; - - total_size = get_totalsize(mc_header); - data_size = get_datasize(mc_header); - if (data_size + MC_HEADER_SIZE > total_size) { - printk(KERN_ERR "microcode: error! " - "Bad data size in microcode data file\n"); - return -EINVAL; - } - - if (mc_header->ldrver != 1 || mc_header->hdrver != 1) { - printk(KERN_ERR "microcode: error! " - "Unknown microcode update format\n"); - return -EINVAL; - } - ext_table_size = total_size - (MC_HEADER_SIZE + data_size); - if (ext_table_size) { - if ((ext_table_size < EXT_HEADER_SIZE) - || ((ext_table_size - EXT_HEADER_SIZE) % EXT_SIGNATURE_SIZE)) { - printk(KERN_ERR "microcode: error! " - "Small exttable size in microcode data file\n"); - return -EINVAL; - } - ext_header = mc + MC_HEADER_SIZE + data_size; - if (ext_table_size != exttable_size(ext_header)) { - printk(KERN_ERR "microcode: error! " - "Bad exttable size in microcode data file\n"); - return -EFAULT; - } - ext_sigcount = ext_header->count; - } - - /* check extended table checksum */ - if (ext_table_size) { - int ext_table_sum = 0; - int *ext_tablep = (int *)ext_header; - - i = ext_table_size / DWSIZE; - while (i--) - ext_table_sum += ext_tablep[i]; - if (ext_table_sum) { - printk(KERN_WARNING "microcode: aborting, " - "bad extended signature table checksum\n"); - return -EINVAL; - } - } - - /* calculate the checksum */ - orig_sum = 0; - i = (MC_HEADER_SIZE + data_size) / DWSIZE; - while (i--) - orig_sum += ((int *)mc)[i]; - if (orig_sum) { - printk(KERN_ERR "microcode: aborting, bad checksum\n"); - return -EINVAL; - } - if (!ext_table_size) - return 0; - /* check extended signature checksum */ - for (i = 0; i < ext_sigcount; i++) { - ext_sig = (void *)ext_header + EXT_HEADER_SIZE + - EXT_SIGNATURE_SIZE * i; - sum = orig_sum - - (mc_header->sig + mc_header->pf + mc_header->cksum) - + (ext_sig->sig + ext_sig->pf + ext_sig->cksum); - if (sum) { - printk(KERN_ERR "microcode: aborting, bad checksum\n"); - return -EINVAL; - } - } - return 0; + struct microcode_header_intel *mc_header = mc; + struct extended_sigtable *ext_header = NULL; + struct extended_signature *ext_sig; + unsigned long total_size, data_size, ext_table_size; + int sum, orig_sum, ext_sigcount = 0, i; + + total_size = get_totalsize(mc_header); + data_size = get_datasize(mc_header); + if ( (data_size + MC_HEADER_SIZE) > total_size ) + { + printk(KERN_ERR "microcode: error! " + "Bad data size in microcode data file\n"); + return -EINVAL; + } + + if ( (mc_header->ldrver != 1) || (mc_header->hdrver != 1) ) + { + printk(KERN_ERR "microcode: error! " + "Unknown microcode update format\n"); + return -EINVAL; + } + ext_table_size = total_size - (MC_HEADER_SIZE + data_size); + if ( ext_table_size ) + { + if ( (ext_table_size < EXT_HEADER_SIZE) || + ((ext_table_size - EXT_HEADER_SIZE) % EXT_SIGNATURE_SIZE) ) + { + printk(KERN_ERR "microcode: error! " + "Small exttable size in microcode data file\n"); + return -EINVAL; + } + ext_header = mc + MC_HEADER_SIZE + data_size; + if ( ext_table_size != exttable_size(ext_header) ) + { + printk(KERN_ERR "microcode: error! " + "Bad exttable size in microcode data file\n"); + return -EFAULT; + } + ext_sigcount = ext_header->count; + } + + /* check extended table checksum */ + if ( ext_table_size ) + { + int ext_table_sum = 0; + int *ext_tablep = (int *)ext_header; + + i = ext_table_size / DWSIZE; + while ( i-- ) + ext_table_sum += ext_tablep[i]; + if ( ext_table_sum ) + { + printk(KERN_WARNING "microcode: aborting, " + "bad extended signature table checksum\n"); + return -EINVAL; + } + } + + /* calculate the checksum */ + orig_sum = 0; + i = (MC_HEADER_SIZE + data_size) / DWSIZE; + while ( i-- ) + orig_sum += ((int *)mc)[i]; + if ( orig_sum ) + { + printk(KERN_ERR "microcode: aborting, bad checksum\n"); + return -EINVAL; + } + if ( !ext_table_size ) + return 0; + /* check extended signature checksum */ + for ( i = 0; i < ext_sigcount; i++ ) + { + ext_sig = (void *)ext_header + EXT_HEADER_SIZE + + EXT_SIGNATURE_SIZE * i; + sum = orig_sum + - (mc_header->sig + mc_header->pf + mc_header->cksum) + + (ext_sig->sig + ext_sig->pf + ext_sig->cksum); + if ( sum ) + { + printk(KERN_ERR "microcode: aborting, bad checksum\n"); + return -EINVAL; + } + } + return 0; } /* @@ -249,118 +199,123 @@ static int microcode_sanity_check(void *mc) */ static int get_matching_microcode(void *mc, int cpu) { - struct ucode_cpu_info *uci = ucode_cpu_info + cpu; - struct microcode_header_intel *mc_header = mc; - struct extended_sigtable *ext_header; - unsigned long total_size = get_totalsize(mc_header); - int ext_sigcount, i; - struct extended_signature *ext_sig; - void *new_mc; - - if (microcode_update_match(cpu, mc_header, - mc_header->sig, mc_header->pf)) - goto find; - - if (total_size <= get_datasize(mc_header) + MC_HEADER_SIZE) - return 0; - - ext_header = mc + get_datasize(mc_header) + MC_HEADER_SIZE; - ext_sigcount = ext_header->count; - ext_sig = (void *)ext_header + EXT_HEADER_SIZE; - for (i = 0; i < ext_sigcount; i++) { - if (microcode_update_match(cpu, mc_header, - ext_sig->sig, ext_sig->pf)) - goto find; - ext_sig++; - } - return 0; -find: - pr_debug("microcode: CPU%d found a matching microcode update with" - " version 0x%x (current=0x%x)\n", - cpu, mc_header->rev, uci->cpu_sig.rev); - new_mc = vmalloc(total_size); - if (!new_mc) { - printk(KERN_ERR "microcode: error! Can not allocate memory\n"); - return -ENOMEM; - } - - /* free previous update file */ - vfree(uci->mc.mc_intel); - - memcpy(new_mc, mc, total_size); - uci->mc.mc_intel = new_mc; - return 1; + struct ucode_cpu_info *uci = ucode_cpu_info + cpu; + struct microcode_header_intel *mc_header = mc; + struct extended_sigtable *ext_header; + unsigned long total_size = get_totalsize(mc_header); + int ext_sigcount, i; + struct extended_signature *ext_sig; + void *new_mc; + + if ( microcode_update_match(cpu, mc_header, + mc_header->sig, mc_header->pf) ) + goto find; + + if ( total_size <= (get_datasize(mc_header) + MC_HEADER_SIZE) ) + return 0; + + ext_header = mc + get_datasize(mc_header) + MC_HEADER_SIZE; + ext_sigcount = ext_header->count; + ext_sig = (void *)ext_header + EXT_HEADER_SIZE; + for ( i = 0; i < ext_sigcount; i++ ) + { + if ( microcode_update_match(cpu, mc_header, + ext_sig->sig, ext_sig->pf) ) + goto find; + ext_sig++; + } + return 0; + find: + pr_debug("microcode: CPU%d found a matching microcode update with" + " version 0x%x (current=0x%x)\n", + cpu, mc_header->rev, uci->cpu_sig.rev); + new_mc = xmalloc_bytes(total_size); + if ( new_mc == NULL ) + { + printk(KERN_ERR "microcode: error! Can not allocate memory\n"); + return -ENOMEM; + } + + /* free previous update file */ + xfree(uci->mc.mc_intel); + + memcpy(new_mc, mc, total_size); + uci->mc.mc_intel = new_mc; + return 1; } static int apply_microcode(int cpu) { - unsigned long flags; - unsigned int val[2]; - int cpu_num = raw_smp_processor_id(); - struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num; - - /* We should bind the task to the CPU */ - BUG_ON(cpu_num != cpu); - - if (uci->mc.mc_intel == NULL) - return -EINVAL; - - /* serialize access to the physical write to MSR 0x79 */ - spin_lock_irqsave(µcode_update_lock, flags); - - /* write microcode via MSR 0x79 */ - wrmsr(MSR_IA32_UCODE_WRITE, - (unsigned long) uci->mc.mc_intel->bits, - (unsigned long) uci->mc.mc_intel->bits >> 16 >> 16); - wrmsr(MSR_IA32_UCODE_REV, 0, 0); - - /* see notes above for revision 1.07. Apparent chip bug */ - sync_core(); - - /* get the current revision from MSR 0x8B */ - rdmsr(MSR_IA32_UCODE_REV, val[0], val[1]); - - spin_unlock_irqrestore(µcode_update_lock, flags); - if (val[1] != uci->mc.mc_intel->hdr.rev) { - printk(KERN_ERR "microcode: CPU%d update from revision " - "0x%x to 0x%x failed\n", cpu_num, uci->cpu_sig.rev, val[1]); - return -EIO; - } - printk(KERN_INFO "microcode: CPU%d updated from revision " - "0x%x to 0x%x, date = %04x-%02x-%02x \n", - cpu_num, uci->cpu_sig.rev, val[1], - uci->mc.mc_intel->hdr.date & 0xffff, - uci->mc.mc_intel->hdr.date >> 24, - (uci->mc.mc_intel->hdr.date >> 16) & 0xff); - uci->cpu_sig.rev = val[1]; - - return 0; + unsigned long flags; + unsigned int val[2]; + int cpu_num = raw_smp_processor_id(); + struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num; + + /* We should bind the task to the CPU */ + BUG_ON(cpu_num != cpu); + + if ( uci->mc.mc_intel == NULL ) + return -EINVAL; + + /* serialize access to the physical write to MSR 0x79 */ + spin_lock_irqsave(µcode_update_lock, flags); + + /* write microcode via MSR 0x79 */ + wrmsr(MSR_IA32_UCODE_WRITE, + (unsigned long) uci->mc.mc_intel->bits, + (unsigned long) uci->mc.mc_intel->bits >> 16 >> 16); + wrmsr(MSR_IA32_UCODE_REV, 0, 0); + + /* see notes above for revision 1.07. Apparent chip bug */ + sync_core(); + + /* get the current revision from MSR 0x8B */ + rdmsr(MSR_IA32_UCODE_REV, val[0], val[1]); + + spin_unlock_irqrestore(µcode_update_lock, flags); + if ( val[1] != uci->mc.mc_intel->hdr.rev ) + { + printk(KERN_ERR "microcode: CPU%d update from revision " + "0x%x to 0x%x failed\n", cpu_num, uci->cpu_sig.rev, val[1]); + return -EIO; + } + printk(KERN_INFO "microcode: CPU%d updated from revision " + "0x%x to 0x%x, date = %04x-%02x-%02x \n", + cpu_num, uci->cpu_sig.rev, val[1], + uci->mc.mc_intel->hdr.date & 0xffff, + uci->mc.mc_intel->hdr.date >> 24, + (uci->mc.mc_intel->hdr.date >> 16) & 0xff); + uci->cpu_sig.rev = val[1]; + + return 0; } static long get_next_ucode_from_buffer(void **mc, const u8 *buf, - unsigned long size, long offset) + unsigned long size, long offset) { - struct microcode_header_intel *mc_header; - unsigned long total_size; - - /* No more data */ - if (offset >= size) - return 0; - mc_header = (struct microcode_header_intel *)(buf + offset); - total_size = get_totalsize(mc_header); - - if (offset + total_size > size) { - printk(KERN_ERR "microcode: error! Bad data in microcode data file\n"); - return -EINVAL; - } - - *mc = vmalloc(total_size); - if (!*mc) { - printk(KERN_ERR "microcode: error! Can not allocate memory\n"); - return -ENOMEM; - } - memcpy(*mc, (const void *)(buf + offset), total_size); - return offset + total_size; + struct microcode_header_intel *mc_header; + unsigned long total_size; + + /* No more data */ + if ( offset >= size ) + return 0; + mc_header = (struct microcode_header_intel *)(buf + offset); + total_size = get_totalsize(mc_header); + + if ( (offset + total_size) > size ) + { + printk(KERN_ERR "microcode: error! Bad data in microcode data file\n"); + return -EINVAL; + } + + *mc = xmalloc_bytes(total_size); + if ( *mc == NULL ) + { + printk(KERN_ERR "microcode: error! Can not allocate memory\n"); + return -ENOMEM; + } + memcpy(*mc, (const void *)(buf + offset), total_size); + return offset + total_size; } /* fake device for request_firmware */ @@ -368,58 +323,61 @@ extern struct platform_device *microcode_pdev; static int cpu_request_microcode(int cpu, const void *buf, size_t size) { - long offset = 0; - int error = 0; - void *mc; - - /* We should bind the task to the CPU */ - BUG_ON(cpu != raw_smp_processor_id()); - - while ((offset = get_next_ucode_from_buffer(&mc, buf, size, offset)) - > 0) { - error = microcode_sanity_check(mc); - if (error) - break; - error = get_matching_microcode(mc, cpu); - if (error < 0) - break; - /* - * It's possible the data file has multiple matching ucode, - * lets keep searching till the latest version - */ - if (error == 1) { - apply_microcode(cpu); - error = 0; - } - vfree(mc); - } - if (offset > 0) - vfree(mc); - if (offset < 0) - error = offset; - - return error; + long offset = 0; + int error = 0; + void *mc; + + /* We should bind the task to the CPU */ + BUG_ON(cpu != raw_smp_processor_id()); + + while ( (offset = get_next_ucode_from_buffer(&mc, buf, size, offset)) > 0 ) + { + error = microcode_sanity_check(mc); + if ( error ) + break; + error = get_matching_microcode(mc, cpu); + if ( error < 0 ) + break; + /* + * It's possible the data file has multiple matching ucode, + * lets keep searching till the latest version + */ + if ( error == 1 ) + { + apply_microcode(cpu); + error = 0; + } + xfree(mc); + } + if ( offset > 0 ) + xfree(mc); + if ( offset < 0 ) + error = offset; + + return error; } static void microcode_fini_cpu(int cpu) { - struct ucode_cpu_info *uci = ucode_cpu_info + cpu; + struct ucode_cpu_info *uci = ucode_cpu_info + cpu; - vfree(uci->mc.mc_intel); - uci->mc.mc_intel = NULL; + xfree(uci->mc.mc_intel); + uci->mc.mc_intel = NULL; } static struct microcode_ops microcode_intel_ops = { - .get_matching_microcode = get_matching_microcode, - .microcode_sanity_check = microcode_sanity_check, - .cpu_request_microcode = cpu_request_microcode, - .collect_cpu_info = collect_cpu_info, - .apply_microcode = apply_microcode, - .microcode_fini_cpu = microcode_fini_cpu, + .get_matching_microcode = get_matching_microcode, + .microcode_sanity_check = microcode_sanity_check, + .cpu_request_microcode = cpu_request_microcode, + .collect_cpu_info = collect_cpu_info, + .apply_microcode = apply_microcode, + .microcode_fini_cpu = microcode_fini_cpu, }; -int microcode_init_intel(struct cpuinfo_x86 *c) +static __init int microcode_init_intel(void) { - microcode_ops = µcode_intel_ops; - return 0; + if ( boot_cpu_data.x86_vendor == X86_VENDOR_INTEL ) + microcode_ops = µcode_intel_ops; + return 0; } +__initcall(microcode_init_intel); |