forked from Minki/linux
x86: add is_errata100 helper to fault_32|64.c
Further towards unifying these files, add another helper in same spirit as is_errata93. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
parent
29caf2f98c
commit
35f3266ffb
@ -286,6 +286,22 @@ static int is_errata93(struct pt_regs *regs, unsigned long address)
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Work around K8 erratum #100 K8 in compat mode occasionally jumps to illegal
|
||||
* addresses >4GB. We catch this in the page fault handler because these
|
||||
* addresses are not reachable. Just detect this case and return. Any code
|
||||
* segment in LDT is compatibility mode.
|
||||
*/
|
||||
static int is_errata100(struct pt_regs *regs, unsigned long address)
|
||||
{
|
||||
#ifdef CONFIG_X86_64
|
||||
if ((regs->cs == __USER32_CS || (regs->cs & (1<<2))) &&
|
||||
(address >> 32))
|
||||
return 1;
|
||||
#endif
|
||||
return 0;
|
||||
}
|
||||
|
||||
void do_invalid_op(struct pt_regs *, unsigned long);
|
||||
|
||||
static int is_f00f_bug(struct pt_regs *regs, unsigned long address)
|
||||
@ -566,6 +582,9 @@ bad_area_nosemaphore:
|
||||
if (is_prefetch(regs, address, error_code))
|
||||
return;
|
||||
|
||||
if (is_errata100(regs, address))
|
||||
return;
|
||||
|
||||
if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
|
||||
printk_ratelimit()) {
|
||||
printk(
|
||||
|
@ -256,6 +256,22 @@ static int is_errata93(struct pt_regs *regs, unsigned long address)
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Work around K8 erratum #100 K8 in compat mode occasionally jumps to illegal
|
||||
* addresses >4GB. We catch this in the page fault handler because these
|
||||
* addresses are not reachable. Just detect this case and return. Any code
|
||||
* segment in LDT is compatibility mode.
|
||||
*/
|
||||
static int is_errata100(struct pt_regs *regs, unsigned long address)
|
||||
{
|
||||
#ifdef CONFIG_X86_64
|
||||
if ((regs->cs == __USER32_CS || (regs->cs & (1<<2))) &&
|
||||
(address >> 32))
|
||||
return 1;
|
||||
#endif
|
||||
return 0;
|
||||
}
|
||||
|
||||
void do_invalid_op(struct pt_regs *, unsigned long);
|
||||
|
||||
static int is_f00f_bug(struct pt_regs *regs, unsigned long address)
|
||||
@ -568,14 +584,7 @@ bad_area_nosemaphore:
|
||||
if (is_prefetch(regs, address, error_code))
|
||||
return;
|
||||
|
||||
/* Work around K8 erratum #100 K8 in compat mode
|
||||
occasionally jumps to illegal addresses >4GB. We
|
||||
catch this here in the page fault handler because
|
||||
these addresses are not reachable. Just detect this
|
||||
case and return. Any code segment in LDT is
|
||||
compatibility mode. */
|
||||
if ((regs->cs == __USER32_CS || (regs->cs & (1<<2))) &&
|
||||
(address >> 32))
|
||||
if (is_errata100(regs, address))
|
||||
return;
|
||||
|
||||
if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
|
||||
|
Loading…
Reference in New Issue
Block a user