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| author | Benjamin Gray <bgray@linux.ibm.com> | 2023-06-19 17:36:25 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2023-06-19 17:36:26 +1000 |
| commit | 5bcba4e6c13f0c889da1f9e67ee10accd9ca4c19 (patch) | |
| tree | da6844eb74b2f2a374adf652893f3b6b56f5e952 /arch/powerpc/kernel/process.c | |
| parent | 0ffd60b782ed79349baf28dd3259c872f39274e9 (diff) | |
powerpc/dexcr: Handle hashchk exception
Recognise and pass the appropriate signal to the user program when a
hashchk instruction triggers. This is independent of allowing
configuration of DEXCR[NPHIE], as a hypervisor can enforce this aspect
regardless of the kernel.
The signal mirrors how ARM reports their similar check failure. For
example, their FPAC handler in arch/arm64/kernel/traps.c do_el0_fpac()
does this. When we fail to read the instruction that caused the fault
we send a segfault, similar to how emulate_math() does it.
Signed-off-by: Benjamin Gray <bgray@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230616034846.311705-5-bgray@linux.ibm.com
Diffstat (limited to 'arch/powerpc/kernel/process.c')
0 files changed, 0 insertions, 0 deletions