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| author | Nicholas Piggin <npiggin@gmail.com> | 2020-06-11 18:12:02 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-07-22 23:00:23 +1000 |
| commit | b2dc2977cba48990df45e0a96150663d4f342700 (patch) | |
| tree | a09c1b479ed48c24cca0c217c080ec5494c2887c /Documentation/powerpc | |
| parent | 48778464bb7d346b47157d21ffde2af6b2d39110 (diff) | |
powerpc/64s/exception: treat NIA below __end_interrupts as soft-masked
The scv instruction causes an interrupt which can enter the kernel with
MSR[EE]=1, thus allowing interrupts to hit at any time. These must not
be taken as normal interrupts, because they come from MSR[PR]=0 context,
and yet the kernel stack is not yet set up and r13 is not set to the
PACA).
Treat this as a soft-masked interrupt regardless of the soft masked
state. This does not affect behaviour yet, because currently all
interrupts are taken with MSR[EE]=0.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200611081203.995112-2-npiggin@gmail.com
Diffstat (limited to 'Documentation/powerpc')
0 files changed, 0 insertions, 0 deletions