From: Christophe Leroy <christophe.leroy@csgroup.eu> To: Benjamin Herrenschmidt <benh@kernel.crashing.org>, Paul Mackerras <paulus@samba.org>, Michael Ellerman <mpe@ellerman.id.au>, npiggin@gmail.com Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: [PATCH v3 00/41] powerpc/32: Switch to interrupt entry/exit in C Date: Fri, 12 Mar 2021 12:50:09 +0000 (UTC) [thread overview] Message-ID: <cover.1615552866.git.christophe.leroy@csgroup.eu> (raw) 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
WARNING: multiple messages have this Message-ID (diff)
From: Christophe Leroy <christophe.leroy@csgroup.eu> To: Benjamin Herrenschmidt <benh@kernel.crashing.org>, Paul Mackerras <paulus@samba.org>, Michael Ellerman <mpe@ellerman.id.au>, npiggin@gmail.com Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 00/41] powerpc/32: Switch to interrupt entry/exit in C Date: Fri, 12 Mar 2021 12:50:09 +0000 (UTC) [thread overview] Message-ID: <cover.1615552866.git.christophe.leroy@csgroup.eu> (raw) 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
next reply other threads:[~2021-03-12 12:51 UTC|newest] Thread overview: 106+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-03-12 12:50 Christophe Leroy [this message] 2021-03-12 12:50 ` [PATCH v3 00/41] powerpc/32: Switch to interrupt entry/exit in C Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 01/41] powerpc/traps: Declare unrecoverable_exception() as __noreturn Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 02/41] powerpc/40x: Don't use SPRN_SPRG_SCRATCH0/1 in TLB miss handlers Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 03/41] powerpc/40x: Change CRITICAL_EXCEPTION_PROLOG macro to a gas macro Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 04/41] powerpc/40x: Save SRR0/SRR1 and r10/r11 earlier in critical exception Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 05/41] powerpc/40x: Reorder a few instructions in critical exception prolog Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 06/41] powerpc/40x: Prepare for enabling MMU " Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 07/41] powerpc/40x: Prepare normal exception handler for enabling MMU early Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 08/41] powerpc/32: Reconcile interrupts in C Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 09/41] powerpc/32: Entry cpu time accounting " Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 10/41] powerpc/32: Handle bookE debugging in C in exception entry Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 11/41] powerpc/32: Use fast instruction to set MSR RI in exception prolog on 8xx Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 12/41] powerpc/32: Remove ksp_limit Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 13/41] powerpc/32: Always enable data translation in exception prolog Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 14/41] powerpc/32: Tag DAR in EXCEPTION_PROLOG_2 for the 8xx Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 15/41] powerpc/32: Enable instruction translation at the same time as data translation Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 16/41] powerpc/32: Statically initialise first emergency context Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 17/41] powerpc/32: Add vmap_stack_overflow label inside the macro Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 18/41] powerpc/32: Use START_EXCEPTION() as much as possible Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 19/41] powerpc/32: Move exception prolog code into .text once MMU is back on Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 20/41] powerpc/32: Provide a name to exception prolog continuation in virtual mode Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 21/41] powerpc/32: Refactor booke critical registers saving Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 22/41] powerpc/32: Perform normal function call in exception entry Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 23/41] powerpc/32: Always save non volatile registers on " Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 24/41] powerpc/32: Replace ASM exception exit by C exception exit from ppc64 Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 25/41] powerpc/32: Don't save thread.regs on interrupt entry Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 26/41] powerpc/32: Set regs parameter in r3 in transfer_to_handler Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 27/41] powerpc/32: Call bad_page_fault() from do_page_fault() Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 28/41] powerpc/32: Save trap number on stack in exception prolog Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 29/41] powerpc/32: Add a prepare_transfer_to_handler macro for exception prologs Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 30/41] powerpc/32: Only restore non volatile registers when required Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 31/41] powerpc/32: Dismantle EXC_XFER_STD/LITE/TEMPLATE Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-07-31 10:12 ` Finn Thain 2021-07-31 10:12 ` Finn Thain 2021-07-31 15:39 ` Christophe Leroy 2021-07-31 15:39 ` Christophe Leroy 2021-08-01 1:21 ` Finn Thain 2021-08-01 1:21 ` Finn Thain 2021-08-01 6:57 ` Stan Johnson 2021-08-01 23:48 ` Finn Thain 2021-08-01 23:48 ` Finn Thain 2021-08-02 15:19 ` LEROY Christophe 2021-08-02 15:19 ` LEROY Christophe 2021-08-03 0:43 ` Finn Thain 2021-08-03 0:43 ` Finn Thain [not found] ` <62d36dbb-4b39-f5bd-7962-4dcfbea729b3@linux-m68k.org> [not found] ` <683c8156-97b0-5ba7-ce31-2e8613089836@yahoo.com> 2021-08-04 4:57 ` Finn Thain 2021-08-04 4:57 ` Finn Thain 2021-07-31 16:40 ` Christophe Leroy 2021-07-31 16:40 ` Christophe Leroy 2021-08-01 1:39 ` Finn Thain 2021-08-01 1:39 ` Finn Thain 2021-03-12 12:50 ` [PATCH v3 32/41] powerpc/32: Remove the xfer parameter in EXCEPTION() macro Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 33/41] powerpc/32: Refactor saving of volatile registers in exception prologs Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 34/41] powerpc/32: Save remaining registers in exception prolog Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 35/41] powerpc/32: Return directly from power_save_ppc32_restore() Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 36/41] powerpc/32: Only use prepare_transfer_to_handler function on book3s/32 and e500 Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 37/41] powerpc/32s: Move KUEP locking/unlocking in C Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-27 17:24 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 38/41] powerpc/64s: Make kuap_check_amr() and kuap_get_and_check_amr() generic Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 39/41] powerpc/32s: Create C version of kuap save/restore/check helpers Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 40/41] powerpc/8xx: " Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-12 12:50 ` [PATCH v3 41/41] powerpc/32: Manage KUAP in C Christophe Leroy 2021-03-12 12:50 ` Christophe Leroy 2021-03-31 1:09 ` [PATCH v3 00/41] powerpc/32: Switch to interrupt entry/exit " Michael Ellerman 2021-03-31 1:09 ` Michael Ellerman
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