This series aims at porting interrupt entry/exit in C on PPC32, using
the work already merged for PPC64.
First patch is an optimisation around unrecoverable_exception() function.
Six following patches do minimal changes in 40x in order to be able to enable
MMU
earlier in exception entry.
Second part of the series prepares and switches interrupt exit in C.
Third part moves more and more things in C, ending with KUAP management.
v3 is tested on 8xx and 83xx and qemu mac99 and qemu bamboo.
Changes in v3:
- Remove the WARN in first patch
- Fix oopses due fast_interrupt_return clobering registers after FPunavailable
expection.
- Only call restore_math if PPC64
- Rename C version of kuap_{get_and_}check() into
kuap_{get_and_}assert_locked().
- Drop the patch to call bad_page_fault() from do_page_fault() on book3e/64
- Remove the unneeded setting of current->thread.regs on every interrupt entry
from user.
Changes in v2:
- Two first patches are new.
- Mainly build fixes, nothing much new.
Christophe Leroy (41):
powerpc/traps: Declare unrecoverable_exception() as __noreturn
powerpc/40x: Don't use SPRN_SPRG_SCRATCH0/1 in TLB miss handlers
powerpc/40x: Change CRITICAL_EXCEPTION_PROLOG macro to a gas macro
powerpc/40x: Save SRR0/SRR1 and r10/r11 earlier in critical exception
powerpc/40x: Reorder a few instructions in critical exception prolog
powerpc/40x: Prepare for enabling MMU in critical exception prolog
powerpc/40x: Prepare normal exception handler for enabling MMU early
powerpc/32: Reconcile interrupts in C
powerpc/32: Entry cpu time accounting in C
powerpc/32: Handle bookE debugging in C in exception entry
powerpc/32: Use fast instruction to set MSR RI in exception prolog on
8xx
powerpc/32: Remove ksp_limit
powerpc/32: Always enable data translation in exception prolog
powerpc/32: Tag DAR in EXCEPTION_PROLOG_2 for the 8xx
powerpc/32: Enable instruction translation at the same time as data
translation
powerpc/32: Statically initialise first emergency context
powerpc/32: Add vmap_stack_overflow label inside the macro
powerpc/32: Use START_EXCEPTION() as much as possible
powerpc/32: Move exception prolog code into .text once MMU is back on
powerpc/32: Provide a name to exception prolog continuation in virtual
mode
powerpc/32: Refactor booke critical registers saving
powerpc/32: Perform normal function call in exception entry
powerpc/32: Always save non volatile registers on exception entry
powerpc/32: Replace ASM exception exit by C exception exit from ppc64
powerpc/32: Don't save thread.regs on interrupt entry
powerpc/32: Set regs parameter in r3 in transfer_to_handler
powerpc/32: Call bad_page_fault() from do_page_fault()
powerpc/32: Save trap number on stack in exception prolog
powerpc/32: Add a prepare_transfer_to_handler macro for exception
prologs
powerpc/32: Only restore non volatile registers when required
powerpc/32: Dismantle EXC_XFER_STD/LITE/TEMPLATE
powerpc/32: Remove the xfer parameter in EXCEPTION() macro
powerpc/32: Refactor saving of volatile registers in exception prologs
powerpc/32: Save remaining registers in exception prolog
powerpc/32: Return directly from power_save_ppc32_restore()
powerpc/32: Only use prepare_transfer_to_handler function on book3s/32
and e500
powerpc/32s: Move KUEP locking/unlocking in C
powerpc/64s: Make kuap_check_amr() and kuap_get_and_check_amr()
generic
powerpc/32s: Create C version of kuap save/restore/check helpers
powerpc/8xx: Create C version of kuap save/restore/check helpers
powerpc/32: Manage KUAP in C
arch/powerpc/include/asm/book3s/32/kup.h | 126 ++-
arch/powerpc/include/asm/book3s/64/kup.h | 24 +-
arch/powerpc/include/asm/interrupt.h | 17 +-
arch/powerpc/include/asm/kup.h | 27 +-
arch/powerpc/include/asm/nohash/32/kup-8xx.h | 56 +-
arch/powerpc/include/asm/ppc_asm.h | 10 -
arch/powerpc/include/asm/processor.h | 6 +-
arch/powerpc/include/asm/ptrace.h | 6 +-
arch/powerpc/kernel/asm-offsets.c | 4 -
arch/powerpc/kernel/entry_32.S | 796 ++++---------------
arch/powerpc/kernel/fpu.S | 2 -
arch/powerpc/kernel/head_32.h | 198 ++---
arch/powerpc/kernel/head_40x.S | 271 ++++---
arch/powerpc/kernel/head_44x.S | 10 +-
arch/powerpc/kernel/head_8xx.S | 151 ++--
arch/powerpc/kernel/head_book3s_32.S | 233 +++---
arch/powerpc/kernel/head_booke.h | 203 +++--
arch/powerpc/kernel/head_fsl_booke.S | 64 +-
arch/powerpc/kernel/idle_6xx.S | 14 +-
arch/powerpc/kernel/idle_e500.S | 14 +-
arch/powerpc/kernel/interrupt.c | 41 +-
arch/powerpc/kernel/irq.c | 2 +-
arch/powerpc/kernel/misc_32.S | 14 -
arch/powerpc/kernel/process.c | 6 +-
arch/powerpc/kernel/setup_32.c | 2 +-
arch/powerpc/kernel/traps.c | 14 +-
arch/powerpc/kernel/vector.S | 2 -
arch/powerpc/lib/sstep.c | 9 -
arch/powerpc/mm/book3s32/Makefile | 1 +
arch/powerpc/mm/book3s32/hash_low.S | 14 -
arch/powerpc/mm/book3s32/kuep.c | 38 +
arch/powerpc/mm/fault.c | 2 +-
32 files changed, 887 insertions(+), 1490 deletions(-)
create mode 100644 arch/powerpc/mm/book3s32/kuep.c
--
2.25.0
