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| author | Nathan Lynch <nathanl@linux.ibm.com> | 2020-12-07 22:51:33 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-12-08 11:40:54 +0100 |
| commit | de0f7349a0dd072e54b5fc04c305907b22d28a5f (patch) | |
| tree | 94cd64cef84e81d102377e03f16896638eaf05bd /arch | |
| parent | powerpc/book3s64/kuap: Improve error reporting with KUAP (diff) | |
| download | linux-de0f7349a0dd072e54b5fc04c305907b22d28a5f.tar.xz linux-de0f7349a0dd072e54b5fc04c305907b22d28a5f.zip | |
powerpc/rtas: prevent suspend-related sys_rtas use on LE
While drmgr has had work in some areas to make its RTAS syscall
interactions endian-neutral, its code for performing partition
migration via the syscall has never worked on LE. While it is able to
complete ibm,suspend-me successfully, it crashes when attempting the
subsequent ibm,update-nodes call.
drmgr is the only known (or plausible) user of ibm,suspend-me,
ibm,update-nodes, and ibm,update-properties, so allow them only in
big-endian configurations.
Signed-off-by: Nathan Lynch <nathanl@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201207215200.1785968-2-nathanl@linux.ibm.com
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/kernel/rtas.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c index 954f41676f69..4ed64aba37d6 100644 --- a/arch/powerpc/kernel/rtas.c +++ b/arch/powerpc/kernel/rtas.c @@ -1050,9 +1050,11 @@ static struct rtas_filter rtas_filters[] __ro_after_init = { { "set-time-for-power-on", -1, -1, -1, -1, -1 }, { "ibm,set-system-parameter", -1, 1, -1, -1, -1 }, { "set-time-of-day", -1, -1, -1, -1, -1 }, +#ifdef CONFIG_CPU_BIG_ENDIAN { "ibm,suspend-me", -1, -1, -1, -1, -1 }, { "ibm,update-nodes", -1, 0, -1, -1, -1, 4096 }, { "ibm,update-properties", -1, 0, -1, -1, -1, 4096 }, +#endif { "ibm,physical-attestation", -1, 0, 1, -1, -1 }, }; |