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| author |   Nicholas Piggin <npiggin@gmail.com> | 2022-09-26 15:56:17 +1000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2022-09-28 19:22:13 +1000 |
| commit | 2f5182cffa43f31c241131a2c10a4ecd8e90fb3e (patch) | |
| tree | a7393ae14c674e9b50b754a75c500070ccb15fe2 /arch/powerpc/include/asm | |
| parent | powerpc/64s/interrupt: move early boot ILE fixup into a macro (diff) | |
| download | linux-dev-2f5182cffa43f31c241131a2c10a4ecd8e90fb3e.tar.xz linux-dev-2f5182cffa43f31c241131a2c10a4ecd8e90fb3e.zip | |
powerpc/64s: early boot machine check handler
Use the early boot interrupt fixup in the machine check handler to allow
the machine check handler to run before interrupt endian is set up.
Branch to an early boot handler that just does a basic crash, which
allows it to run before ppc_md is set up. MSR[ME] is enabled on the boot
CPU earlier, and the machine check stack is temporarily set to the
middle of the init task stack.
This allows machine checks (e.g., due to invalid data access in real
mode) to print something useful earlier in boot (as soon as udbg is set
up, if CONFIG_PPC_EARLY_DEBUG=y).
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220926055620.2676869-3-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/include/asm')
| -rw-r--r-- | arch/powerpc/include/asm/asm-prototypes.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/asm-prototypes.h b/arch/powerpc/include/asm/asm-prototypes.h index e1b3e90eec94..274bce76f5da 100644 --- a/arch/powerpc/include/asm/asm-prototypes.h +++ b/arch/powerpc/include/asm/asm-prototypes.h @@ -36,6 +36,7 @@ int64_t __opal_call(int64_t a0, int64_t a1, int64_t a2, int64_t a3, int64_t opcode, uint64_t msr); /* misc runtime */ +void enable_machine_check(void); extern u64 __bswapdi2(u64); extern s64 __lshrdi3(s64, int); extern s64 __ashldi3(s64, int); |