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| author | Nicholas Piggin <npiggin@gmail.com> | 2020-02-25 20:35:39 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-04-01 05:42:14 +0300 |
| commit | 5f0b6ac3905fc961f3b685a08eb4962ff071ea7d (patch) | |
| tree | d0d788504aa2587161ae1b19fa376e506303a48b /arch/powerpc/kernel/entry_64.S | |
| parent | 702f0980522239bc7fd1360b24f722a90b6b4418 (diff) | |
| download | linux-5f0b6ac3905fc961f3b685a08eb4962ff071ea7d.tar.xz | |
powerpc/64/syscall: Reconcile interrupts
This reconciles interrupts in the system call case like all other
interrupts. This allows system_call_common to be shared with the scv
system call implementation in a subsequent patch.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200225173541.1549955-31-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/kernel/entry_64.S')
| -rw-r--r-- | arch/powerpc/kernel/entry_64.S | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S index 95905ed3d86e..63f0a4414618 100644 --- a/arch/powerpc/kernel/entry_64.S +++ b/arch/powerpc/kernel/entry_64.S @@ -119,6 +119,17 @@ END_BTB_FLUSH_SECTION ld r11,exception_marker@toc(r2) std r11,-16(r10) /* "regshere" marker */ + /* + * RECONCILE_IRQ_STATE without calling trace_hardirqs_off(), which + * would clobber syscall parameters. Also we always enter with IRQs + * enabled and nothing pending. system_call_exception() will call + * trace_hardirqs_off(). + */ + li r11,IRQS_ALL_DISABLED + li r12,PACA_IRQ_HARD_DIS + stb r11,PACAIRQSOFTMASK(r13) + stb r12,PACAIRQHAPPENED(r13) + /* Calling convention has r9 = orig r0, r10 = regs */ mr r9,r0 bl system_call_exception |