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| author | Zhigang Lu <zlu@tilera.com> | 2014-01-27 16:25:28 +0800 |
|---|---|---|
| committer | Chris Metcalf <cmetcalf@tilera.com> | 2014-03-07 11:19:48 -0500 |
| commit | ba67823163c963de7f1f2d87526c9c87f3a3ea0b (patch) | |
| tree | 908c8edc92f82b4565ee0d36003d4b3b2afb0c63 /arch/tile/kernel | |
| parent | 8e3441ebab48c3537b1a9ae06fb7616a3332bd35 (diff) | |
| download | linux-0-day-ba67823163c963de7f1f2d87526c9c87f3a3ea0b.tar.gz linux-0-day-ba67823163c963de7f1f2d87526c9c87f3a3ea0b.tar.xz | |
tile: Enable NMIs on return from handle_nmi() without errors
NMI interrupts mask ALL interrupts before calling the handler,
so we need to unmask NMIs according to the value handle_nmi() returns.
If it returns zero, the NMIs should be re-enabled; if it returns
a non-zero error, the NMIs should be disabled.
Signed-off-by: Zhigang Lu <zlu@tilera.com>
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Diffstat (limited to 'arch/tile/kernel')
| -rw-r--r-- | arch/tile/kernel/intvec_32.S | 11 | ||||
| -rw-r--r-- | arch/tile/kernel/intvec_64.S | 11 |
2 files changed, 21 insertions, 1 deletions
diff --git a/arch/tile/kernel/intvec_32.S b/arch/tile/kernel/intvec_32.S index 605ffbda44ffa..cdbda45a4e4bb 100644 --- a/arch/tile/kernel/intvec_32.S +++ b/arch/tile/kernel/intvec_32.S @@ -946,6 +946,13 @@ STD_ENTRY(interrupt_return) bzt r30, .Lrestore_regs 3: + /* We are relying on INT_PERF_COUNT at 33, and AUX_PERF_COUNT at 48 */ + { + moveli r0, lo16(1 << (INT_PERF_COUNT - 32)) + bz r31, .Lrestore_regs + } + auli r0, r0, ha16(1 << (INT_AUX_PERF_COUNT - 32)) + mtspr SPR_INTERRUPT_MASK_RESET_K_1, r0 /* * We now commit to returning from this interrupt, since we will be @@ -1171,6 +1178,10 @@ handle_nmi: PTREGS_PTR(r0, PTREGS_OFFSET_BASE) } FEEDBACK_REENTER(handle_nmi) + { + movei r30, 1 + seq r31, r0, zero + } j interrupt_return STD_ENDPROC(handle_nmi) diff --git a/arch/tile/kernel/intvec_64.S b/arch/tile/kernel/intvec_64.S index 8f892a58afd41..5b67efcecabd1 100644 --- a/arch/tile/kernel/intvec_64.S +++ b/arch/tile/kernel/intvec_64.S @@ -971,6 +971,15 @@ STD_ENTRY(interrupt_return) beqzt r30, .Lrestore_regs 3: +#if INT_PERF_COUNT + 1 != INT_AUX_PERF_COUNT +# error Bad interrupt assumption +#endif + { + movei r0, 3 /* two adjacent bits for the PERF_COUNT mask */ + beqz r31, .Lrestore_regs + } + shli r0, r0, INT_PERF_COUNT + mtspr SPR_INTERRUPT_MASK_RESET_K, r0 /* * We now commit to returning from this interrupt, since we will be @@ -1187,7 +1196,7 @@ handle_nmi: FEEDBACK_REENTER(handle_nmi) { movei r30, 1 - move r31, r0 + cmpeq r31, r0, zero } j interrupt_return STD_ENDPROC(handle_nmi) |