| Message ID | 20200423044057.5517-1-alistair@popple.id.au (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [1/2] powerpc: dt_cpu_ftrs: Set current thread fscr bits | expand |
| Context | Check | Description |
|---|---|---|
| snowpatch_ozlabs/apply_patch | success | Successfully applied on branch powerpc/merge (8299da600ad05b8aa0f15ec0f5f03bd40e37d6f0) |
| snowpatch_ozlabs/checkpatch | success | total: 0 errors, 0 warnings, 0 checks, 14 lines checked |
| snowpatch_ozlabs/needsstable | success | Patch has no Fixes tags |
diff --git a/arch/powerpc/kernel/dt_cpu_ftrs.c b/arch/powerpc/kernel/dt_cpu_ftrs.c index 36bc0d5c4f3a..dede8f0b678f 100644 --- a/arch/powerpc/kernel/dt_cpu_ftrs.c +++ b/arch/powerpc/kernel/dt_cpu_ftrs.c @@ -169,6 +169,7 @@ static int __init feat_try_enable_unknown(struct dt_cpu_feature *f) u64 fscr = mfspr(SPRN_FSCR); fscr |= 1UL << f->fscr_bit_nr; mtspr(SPRN_FSCR, fscr); + current->thread.fscr |= 1UL << f->fscr_bit_nr; } else { /* Does not have a known recipe */ return 0; @@ -204,6 +205,7 @@ static int __init feat_enable(struct dt_cpu_feature *f) u64 fscr = mfspr(SPRN_FSCR); fscr |= 1UL << f->fscr_bit_nr; mtspr(SPRN_FSCR, fscr); + current->thread.fscr |= 1UL << f->fscr_bit_nr; } }
Setting the FSCR bit directly in the SPR only sets it for the initial boot and early init of the kernel. When the init process is started it gets copied from the current thread_struct which does not reflect any changes made during CPU feature detection. This patch ensures the current thread_struct state is updated to match FSCR after feature detection is complete. Signed-off-by: Alistair Popple <alistair@popple.id.au> --- arch/powerpc/kernel/dt_cpu_ftrs.c | 2 ++ 1 file changed, 2 insertions(+)