mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-26 11:15:10 +07:00
9254970cbb
Install a non-faulting handler just before unmasking imprecise aborts and switch back to the regular one after unmasking is done. This catches any pending imprecise abort that the firmware/bootloader may have left behind that would normally crash the kernel at that point. As there are apparently a lot of bootlaoders out there that do such a thing it makes sense to handle it in the common startup code. Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Tested-by: Tyler Baker <tyler.baker@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
30 lines
679 B
C
30 lines
679 B
C
#ifndef __ARCH_ARM_FAULT_H
|
|
#define __ARCH_ARM_FAULT_H
|
|
|
|
/*
|
|
* Fault status register encodings. We steal bit 31 for our own purposes.
|
|
*/
|
|
#define FSR_LNX_PF (1 << 31)
|
|
#define FSR_WRITE (1 << 11)
|
|
#define FSR_FS4 (1 << 10)
|
|
#define FSR_FS3_0 (15)
|
|
#define FSR_FS5_0 (0x3f)
|
|
|
|
#ifdef CONFIG_ARM_LPAE
|
|
static inline int fsr_fs(unsigned int fsr)
|
|
{
|
|
return fsr & FSR_FS5_0;
|
|
}
|
|
#else
|
|
static inline int fsr_fs(unsigned int fsr)
|
|
{
|
|
return (fsr & FSR_FS3_0) | (fsr & FSR_FS4) >> 6;
|
|
}
|
|
#endif
|
|
|
|
void do_bad_area(unsigned long addr, unsigned int fsr, struct pt_regs *regs);
|
|
unsigned long search_exception_table(unsigned long addr);
|
|
void early_abt_enable(void);
|
|
|
|
#endif /* __ARCH_ARM_FAULT_H */
|