starfive-tech/linux.git/arch/powerpc/kernel/interrupt.c, branch master

powerpc/traps: Enhance readability for trap types

2021-04-17T12:20:19+00:00

Define macros to list ppc interrupt types in interttupt.h, replace the reference of the trap hex values with these macros. Referred the hex numbers in arch/powerpc/kernel/exceptions-64e.S, arch/powerpc/kernel/exceptions-64s.S, arch/powerpc/kernel/head_*.S, arch/powerpc/kernel/head_booke.h and arch/powerpc/include/asm/kvm_asm.h. Signed-off-by: Xiongwei Song [mpe: Resolve conflicts in nmi_disables_ftrace(), fix 40x build] Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/1618398033-13025-1-git-send-email-sxwjean@me.com

powerpc: remove partial register save logic

2021-04-14T13:04:44+00:00

All subarchitectures always save all GPRs to pt_regs interrupt frames now. Remove FULL_REGS and associated bits. Signed-off-by: Nicholas Piggin Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20210316104206.407354-11-npiggin@gmail.com

powerpc/64e/interrupt: Use new interrupt context tracking scheme

2021-04-14T13:04:43+00:00

With the new interrupt exit code, context tracking can be managed more precisely, so remove the last of the 64e workarounds and switch to the new context tracking code already used by 64s. Signed-off-by: Nicholas Piggin Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20210316104206.407354-8-npiggin@gmail.com

powerpc/interrupt: update common interrupt code for

2021-04-14T13:04:20+00:00

This makes adjustments to 64-bit asm and common C interrupt return code to be usable by the 64e subarchitecture. Signed-off-by: Nicholas Piggin Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20210316104206.407354-4-npiggin@gmail.com

powerpc/syscall: switch user_exit_irqoff and trace_hardirqs_off order

2021-04-14T13:04:19+00:00

user_exit_irqoff() -> __context_tracking_exit -> vtime_user_exit warns in __seqprop_assert due to lockdep thinking preemption is enabled because trace_hardirqs_off() has not yet been called. Switch the order of these two calls, which matches their ordering in interrupt_enter_prepare. Fixes: 5f0b6ac3905f ("powerpc/64/syscall: Reconcile interrupts") Signed-off-by: Nicholas Piggin Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20210316104206.407354-2-npiggin@gmail.com

powerpc/32: Manage KUAP in C

2021-03-29T02:22:11+00:00

Move all KUAP management in C. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/199365ddb58d579daf724815f2d0acb91cc49d19.1615552867.git.christophe.leroy@csgroup.eu

powerpc/64s: Make kuap_check_amr() and kuap_get_and_check_amr() generic

2021-03-29T02:22:11+00:00

In preparation of porting powerpc32 to C syscall entry/exit, rename kuap_check_amr() and kuap_get_and_check_amr() as kuap_assert_locked() and kuap_get_and_assert_locked(), and move in the generic asm/kup.h the stub for when CONFIG_PPC_KUAP is not selected. Signed-off-by: Christophe Leroy Reviewed-by: Nicholas Piggin Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/f82614d9b17b83abd739aa18fc08811815d0c2e3.1615552867.git.christophe.leroy@csgroup.eu

powerpc/32s: Move KUEP locking/unlocking in C

2021-03-29T02:22:10+00:00

This can be done in C, do it. Unrolling the loop gains approx. 15% performance. From now on, prepare_transfer_to_handler() is only for interrupts from kernel. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/4eadd873927e9a73c3d1dfe2f9497353465514cf.1615552867.git.christophe.leroy@csgroup.eu

powerpc/32: Replace ASM exception exit by C exception exit from ppc64

2021-03-29T02:22:07+00:00

This patch replaces the PPC32 ASM exception exit by C exception exit. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/48f8bae91da899d8e73fc0d75c9af66cc97b4d5b.1615552867.git.christophe.leroy@csgroup.eu

powerpc/traps: unrecoverable_exception() is not an interrupt handler

2021-03-12T00:02:12+00:00

unrecoverable_exception() is called from interrupt handlers or after an interrupt handler has failed. Make it a standard function to avoid doubling the actions performed on interrupt entry (e.g.: user time accounting). Fixes: 3a96570ffceb ("powerpc: convert interrupt handlers to use wrappers") Signed-off-by: Christophe Leroy Reviewed-by: Nicholas Piggin Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/ae96c59fa2cb7f24a8929c58cfa2c909cb8ff1f1.1615291471.git.christophe.leroy@csgroup.eu