[PATCH 1/3] powerpc/64s: Mask NIP before checking against SRR0

[Michael Ellerman]

On Wed, 22 Dec 2021 00:50:59 +1100, Michael Ellerman wrote:
> When CONFIG_PPC_RFI_SRR_DEBUG=y we check that NIP and SRR0 match when
> returning from interrupts. This can trigger falsely if NIP has either of
> its two low bits set via sigreturn or ptrace, while SRR0 has its low two
> bits masked in hardware.
> 
> As a quick fix make sure to mask the low bits before doing the check.
> 
> [...]

Applied to powerpc/next.

[1/3] powerpc/64s: Mask NIP before checking against SRR0
      https://git.kernel.org/powerpc/c/314f6c23dd8d417281eb9e8a516dd98036f2e7b3
[2/3] powerpc/64s: Use EMIT_WARN_ENTRY for SRR debug warnings
      https://git.kernel.org/powerpc/c/fd1eaaaaa6864b5fb8f99880fcefb49760b8fe4e
[3/3] selftests/powerpc: Add a test of sigreturning to an unaligned address
      https://git.kernel.org/powerpc/c/beeac538c366cd2828092adecd1edab28326c55b

cheers