diff options
| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2019-04-30 15:38:59 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-05-02 18:20:27 +0300 |
| commit | 642770dd96cb04e7cf8f7677e35cd528cda0a97b (patch) | |
| tree | 47edb9f2d1a6334e534de732f3a58261ba4dfe7e /arch/powerpc/kernel/head_40x.S | |
| parent | f97dec21a306967edbc49ce46f3ecefa3cd16907 (diff) | |
| download | linux-642770dd96cb04e7cf8f7677e35cd528cda0a97b.tar.xz | |
powerpc/32: Enter exceptions with MSR_EE unset
All exceptions handlers know when to reenable interrupts, so
it is safer to enter all of them with MSR_EE unset, except
for syscalls.
Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
[splited out from benh RFC patch]
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/head_40x.S')
| -rw-r--r-- | arch/powerpc/kernel/head_40x.S | 44 |
1 files changed, 22 insertions, 22 deletions
diff --git a/arch/powerpc/kernel/head_40x.S b/arch/powerpc/kernel/head_40x.S index 3e1b8a85cc0d..0463f56fc7ab 100644 --- a/arch/powerpc/kernel/head_40x.S +++ b/arch/powerpc/kernel/head_40x.S @@ -332,7 +332,7 @@ _ENTRY(saved_ksp_limit) mfspr r4,SPRN_DEAR /* Grab the DEAR and save it */ stw r4,_DEAR(r11) addi r3,r1,STACK_FRAME_OVERHEAD - EXC_XFER_EE(0x600, alignment_exception) + EXC_XFER_STD(0x600, alignment_exception) /* 0x0700 - Program Exception */ START_EXCEPTION(0x0700, ProgramCheck) @@ -342,19 +342,19 @@ _ENTRY(saved_ksp_limit) addi r3,r1,STACK_FRAME_OVERHEAD EXC_XFER_STD(0x700, program_check_exception) - EXCEPTION(0x0800, Trap_08, unknown_exception, EXC_XFER_EE) - EXCEPTION(0x0900, Trap_09, unknown_exception, EXC_XFER_EE) - EXCEPTION(0x0A00, Trap_0A, unknown_exception, EXC_XFER_EE) - EXCEPTION(0x0B00, Trap_0B, unknown_exception, EXC_XFER_EE) + EXCEPTION(0x0800, Trap_08, unknown_exception, EXC_XFER_STD) + EXCEPTION(0x0900, Trap_09, unknown_exception, EXC_XFER_STD) + EXCEPTION(0x0A00, Trap_0A, unknown_exception, EXC_XFER_STD) + EXCEPTION(0x0B00, Trap_0B, unknown_exception, EXC_XFER_STD) /* 0x0C00 - System Call Exception */ START_EXCEPTION(0x0C00, SystemCall) EXCEPTION_PROLOG EXC_XFER_SYS(0xc00, DoSyscall) - EXCEPTION(0x0D00, Trap_0D, unknown_exception, EXC_XFER_EE) - EXCEPTION(0x0E00, Trap_0E, unknown_exception, EXC_XFER_EE) - EXCEPTION(0x0F00, Trap_0F, unknown_exception, EXC_XFER_EE) + EXCEPTION(0x0D00, Trap_0D, unknown_exception, EXC_XFER_STD) + EXCEPTION(0x0E00, Trap_0E, unknown_exception, EXC_XFER_STD) + EXCEPTION(0x0F00, Trap_0F, unknown_exception, EXC_XFER_STD) /* 0x1000 - Programmable Interval Timer (PIT) Exception */ . = 0x1000 @@ -571,25 +571,25 @@ _ENTRY(saved_ksp_limit) mfspr r10, SPRN_SPRG_SCRATCH0 b InstructionAccess - EXCEPTION(0x1300, Trap_13, unknown_exception, EXC_XFER_EE) - EXCEPTION(0x1400, Trap_14, unknown_exception, EXC_XFER_EE) - EXCEPTION(0x1500, Trap_15, unknown_exception, EXC_XFER_EE) - EXCEPTION(0x1600, Trap_16, unknown_exception, EXC_XFER_EE) + EXCEPTION(0x1300, Trap_13, unknown_exception, EXC_XFER_STD) + EXCEPTION(0x1400, Trap_14, unknown_exception, EXC_XFER_STD) + EXCEPTION(0x1500, Trap_15, unknown_exception, EXC_XFER_STD) + EXCEPTION(0x1600, Trap_16, unknown_exception, EXC_XFER_STD) #ifdef CONFIG_IBM405_ERR51 /* 405GP errata 51 */ START_EXCEPTION(0x1700, Trap_17) b DTLBMiss #else - EXCEPTION(0x1700, Trap_17, unknown_exception, EXC_XFER_EE) + EXCEPTION(0x1700, Trap_17, unknown_exception, EXC_XFER_STD) #endif - EXCEPTION(0x1800, Trap_18, unknown_exception, EXC_XFER_EE) - EXCEPTION(0x1900, Trap_19, unknown_exception, EXC_XFER_EE) - EXCEPTION(0x1A00, Trap_1A, unknown_exception, EXC_XFER_EE) - EXCEPTION(0x1B00, Trap_1B, unknown_exception, EXC_XFER_EE) - EXCEPTION(0x1C00, Trap_1C, unknown_exception, EXC_XFER_EE) - EXCEPTION(0x1D00, Trap_1D, unknown_exception, EXC_XFER_EE) - EXCEPTION(0x1E00, Trap_1E, unknown_exception, EXC_XFER_EE) - EXCEPTION(0x1F00, Trap_1F, unknown_exception, EXC_XFER_EE) + EXCEPTION(0x1800, Trap_18, unknown_exception, EXC_XFER_STD) + EXCEPTION(0x1900, Trap_19, unknown_exception, EXC_XFER_STD) + EXCEPTION(0x1A00, Trap_1A, unknown_exception, EXC_XFER_STD) + EXCEPTION(0x1B00, Trap_1B, unknown_exception, EXC_XFER_STD) + EXCEPTION(0x1C00, Trap_1C, unknown_exception, EXC_XFER_STD) + EXCEPTION(0x1D00, Trap_1D, unknown_exception, EXC_XFER_STD) + EXCEPTION(0x1E00, Trap_1E, unknown_exception, EXC_XFER_STD) + EXCEPTION(0x1F00, Trap_1F, unknown_exception, EXC_XFER_STD) /* Check for a single step debug exception while in an exception * handler before state has been saved. This is to catch the case @@ -665,7 +665,7 @@ Decrementer: FITException: EXCEPTION_PROLOG addi r3,r1,STACK_FRAME_OVERHEAD; - EXC_XFER_EE(0x1010, unknown_exception) + EXC_XFER_STD(0x1010, unknown_exception) /* Watchdog Timer (WDT) Exception. (from 0x1020) */ WDTException: |