diff options
| author | Wei Wang <wvw@google.com> | 2026-11-03 17:59:41 +0000 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2026-11-04 18:21:16 +0000 |
| commit | beeec04046227eba42b7cc5ab32498aa43da9632 (patch) | |
| tree | ef326da43e491b52bdac0aa0ece2650d3c38e29c /scripts/subarch.include | |
| parent | 6628e7d4c6b25c8d18f1345e3a20d21829aae7e4 (diff) | |
arm64: suspend: Save and restore TPIDR2_EL0 across CPU suspend
TPIDR2_EL0 is a live EL0 register on systems with SME, but
cpu_do_suspend()/cpu_do_resume() don't preserve it. Its value is
UNKNOWN after a warm reset, so the task that initiates suspend can
return to userspace with a corrupted TPIDR2_EL0.
Save and restore it alongside TPIDR_EL0 and TPIDRRO_EL0. The new slot
fits in existing padding, so sizeof(struct cpu_suspend_ctx) is
unchanged.
Fixes: a9d691585950 ("arm64/sme: Implement support for TPIDR2")
Cc: stable@vger.kernel.org
Acked-by: Will Deacon <will@kernel.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Wei Wang <wvw@google.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'scripts/subarch.include')
0 files changed, 0 insertions, 0 deletions