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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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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
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#define __ARCH_ARM_FAULT_H
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/*
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* Fault status register encodings. We steal bit 31 for our own purposes.
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*/
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#define FSR_LNX_PF (1 << 31)
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#define FSR_WRITE (1 << 11)
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#define FSR_FS4 (1 << 10)
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#define FSR_FS3_0 (15)
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#define FSR_FS5_0 (0x3f)
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#ifdef CONFIG_ARM_LPAE
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static inline int fsr_fs(unsigned int fsr)
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{
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return fsr & FSR_FS5_0;
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}
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#else
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static inline int fsr_fs(unsigned int fsr)
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{
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return (fsr & FSR_FS3_0) | (fsr & FSR_FS4) >> 6;
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}
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#endif
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void do_bad_area(unsigned long addr, unsigned int fsr, struct pt_regs *regs);
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unsigned long search_exception_table(unsigned long addr);
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void early_abt_enable(void);
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#endif /* __ARCH_ARM_FAULT_H */
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