| fault.c (8decf868790b48a727d7e7ca164f2bcd3c1389c0) | fault.c (e05139f2569ecf699b229a6473a86cdffed62956) |
|---|---|
| 1/* 2 * Copyright (C) 1995 Linus Torvalds 3 * Copyright (C) 2001, 2002 Andi Kleen, SuSE Labs. 4 * Copyright (C) 2008-2009, Red Hat Inc., Ingo Molnar 5 */ 6#include <linux/magic.h> /* STACK_END_MAGIC */ 7#include <linux/sched.h> /* test_thread_flag(), ... */ 8#include <linux/kdebug.h> /* oops_begin/end, ... */ --- 406 unchanged lines hidden (view full) --- 415 * that: 416 */ 417 if (!pte_present(*pte) || pte_pfn(*pte) != pte_pfn(*pte_ref)) 418 BUG(); 419 420 return 0; 421} 422 | 1/* 2 * Copyright (C) 1995 Linus Torvalds 3 * Copyright (C) 2001, 2002 Andi Kleen, SuSE Labs. 4 * Copyright (C) 2008-2009, Red Hat Inc., Ingo Molnar 5 */ 6#include <linux/magic.h> /* STACK_END_MAGIC */ 7#include <linux/sched.h> /* test_thread_flag(), ... */ 8#include <linux/kdebug.h> /* oops_begin/end, ... */ --- 406 unchanged lines hidden (view full) --- 415 * that: 416 */ 417 if (!pte_present(*pte) || pte_pfn(*pte) != pte_pfn(*pte_ref)) 418 BUG(); 419 420 return 0; 421} 422 |
| 423#ifdef CONFIG_CPU_SUP_AMD |
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| 423static const char errata93_warning[] = 424KERN_ERR 425"******* Your BIOS seems to not contain a fix for K8 errata #93\n" 426"******* Working around it, but it may cause SEGVs or burn power.\n" 427"******* Please consider a BIOS update.\n" 428"******* Disabling USB legacy in the BIOS may also help.\n"; | 424static const char errata93_warning[] = 425KERN_ERR 426"******* Your BIOS seems to not contain a fix for K8 errata #93\n" 427"******* Working around it, but it may cause SEGVs or burn power.\n" 428"******* Please consider a BIOS update.\n" 429"******* Disabling USB legacy in the BIOS may also help.\n"; |
| 430#endif |
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| 429 430/* 431 * No vm86 mode in 64-bit mode: 432 */ 433static inline void 434check_v8086_mode(struct pt_regs *regs, unsigned long address, 435 struct task_struct *tsk) 436{ --- 63 unchanged lines hidden (view full) --- 500 * The OS sees this as a page fault with the upper 32bits of RIP cleared. 501 * Try to work around it here. 502 * 503 * Note we only handle faults in kernel here. 504 * Does nothing on 32-bit. 505 */ 506static int is_errata93(struct pt_regs *regs, unsigned long address) 507{ | 431 432/* 433 * No vm86 mode in 64-bit mode: 434 */ 435static inline void 436check_v8086_mode(struct pt_regs *regs, unsigned long address, 437 struct task_struct *tsk) 438{ --- 63 unchanged lines hidden (view full) --- 502 * The OS sees this as a page fault with the upper 32bits of RIP cleared. 503 * Try to work around it here. 504 * 505 * Note we only handle faults in kernel here. 506 * Does nothing on 32-bit. 507 */ 508static int is_errata93(struct pt_regs *regs, unsigned long address) 509{ |
| 508#ifdef CONFIG_X86_64 | 510#if defined(CONFIG_X86_64) && defined(CONFIG_CPU_SUP_AMD) 511 if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD 512 || boot_cpu_data.x86 != 0xf) 513 return 0; 514 |
| 509 if (address != regs->ip) 510 return 0; 511 512 if ((address >> 32) != 0) 513 return 0; 514 515 address |= 0xffffffffUL << 32; 516 if ((address >= (u64)_stext && address <= (u64)_etext) || --- 679 unchanged lines hidden --- | 515 if (address != regs->ip) 516 return 0; 517 518 if ((address >> 32) != 0) 519 return 0; 520 521 address |= 0xffffffffUL << 32; 522 if ((address >= (u64)_stext && address <= (u64)_etext) || --- 679 unchanged lines hidden --- |