| Message ID | 20210922145452.352571-1-npiggin@gmail.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | powerpc/64s: interrupt speedups | expand |
On Thu, 23 Sep 2021 00:54:46 +1000, Nicholas Piggin wrote: > Here's a few stragglers. The first patch was submitted already but had > some bugs with unrecoverable exceptions on HPT (current->blah being > accessed before MSR[RI] was enabled). Those should be fixed now. > > The others are generally for helping asynch interrupts, which are a bit > harder to measure well but important for IO and IPIs. > > [...] Applied to powerpc/next. [1/6] powerpc/64/interrupt: make normal synchronous interrupts enable MSR[EE] if possible https://git.kernel.org/powerpc/c/4423eb5ae32ec613af3fceee2fe84234e417ee55 [2/6] powerpc/64s/interrupt: handle MSR EE and RI in interrupt entry wrapper https://git.kernel.org/powerpc/c/ff0b0d6e1a7bc202241a9b1e28d1da4b744e0312 [3/6] powerpc/64s/perf: add power_pmu_wants_prompt_pmi to say whether perf wants PMIs to be soft-NMI https://git.kernel.org/powerpc/c/5a7745b96f43c69f9b4875bcf516a0341acbc3fb [4/6] powerpc/64s/interrupt: Don't enable MSR[EE] in irq handlers unless perf is in use https://git.kernel.org/powerpc/c/0faf20a1ad1647c0fc0f5a367c71e5e84deaf899 [5/6] powerpc/64/interrupt: reduce expensive debug tests https://git.kernel.org/powerpc/c/ecb1057c0f9a0f3f052294de6cc2eb43ecf7547b [6/6] powerpc/64s/interrupt: avoid saving CFAR in some asynchronous interrupts https://git.kernel.org/powerpc/c/af47d79b041deccc31e0dddc6310a654c13d04b6 cheers
Here's a few stragglers. The first patch was submitted already but had some bugs with unrecoverable exceptions on HPT (current->blah being accessed before MSR[RI] was enabled). Those should be fixed now. The others are generally for helping asynch interrupts, which are a bit harder to measure well but important for IO and IPIs. After this series, the SPR accesses of the interrupt handlers for radix are becoming pretty optimal except for PPR which we could improve on, and virt CPU accounting which is very costly -- we might disable that by default unless someone comes up with a good reason to keep it. Since v1: - Compile fixes for 64e. - Fixed a SOFT_MASK_DEBUG false positive. - Improve function name and comments explaining why patch 2 does not need to hard enable when PMU is enabled via sysfs. Since v2: - Split first patch into patch 1 and 2, improve on the changelogs. - More compile fixes. - Fixed several review comments from Daniel. - Added patch 5. Thanks, Nick Nicholas Piggin (6): powerpc/64/interrupt: make normal synchronous interrupts enable MSR[EE] if possible powerpc/64s/interrupt: handle MSR EE and RI in interrupt entry wrapper powerpc/64s/perf: add power_pmu_wants_prompt_pmi to say whether perf wants PMIs to be soft-NMI powerpc/64s/interrupt: Don't enable MSR[EE] in irq handlers unless perf is in use powerpc/64/interrupt: reduce expensive debug tests powerpc/64s/interrupt: avoid saving CFAR in some asynchronous interrupts arch/powerpc/include/asm/hw_irq.h | 59 +++++++++++++--- arch/powerpc/include/asm/interrupt.h | 58 ++++++++++++--- arch/powerpc/kernel/dbell.c | 3 +- arch/powerpc/kernel/exceptions-64s.S | 101 ++++++++++++++++++--------- arch/powerpc/kernel/fpu.S | 5 ++ arch/powerpc/kernel/irq.c | 3 +- arch/powerpc/kernel/time.c | 31 ++++---- arch/powerpc/kernel/vector.S | 10 +++ arch/powerpc/perf/core-book3s.c | 31 ++++++++ 9 files changed, 232 insertions(+), 69 deletions(-)