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| author | Chris Metcalf <cmetcalf@tilera.com> | 2010-09-15 11:16:10 -0400 |
|---|---|---|
| committer | Chris Metcalf <cmetcalf@tilera.com> | 2010-09-15 11:16:10 -0400 |
| commit | a802fc685426303ab627b7ad3fd5c97b5dea7e00 (patch) | |
| tree | 29a4ae60405318129efc0897f311a6ac4b1328d2 /arch/tile/kernel | |
| parent | 74fca9da097b74117ae2cef9e5f0d9b0e28ccbb7 (diff) | |
| download | linux-a802fc685426303ab627b7ad3fd5c97b5dea7e00.tar.bz2 | |
arch/tile: Save and restore extra user state for tilegx
During context switch, save and restore a couple of additional bits of
tilegx user state that can be persistently modified by userspace.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Diffstat (limited to 'arch/tile/kernel')
| -rw-r--r-- | arch/tile/kernel/process.c | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/arch/tile/kernel/process.c b/arch/tile/kernel/process.c index 88be49e3aa25..c37b6e3873c1 100644 --- a/arch/tile/kernel/process.c +++ b/arch/tile/kernel/process.c @@ -408,6 +408,15 @@ static void save_arch_state(struct thread_struct *t) #if CHIP_HAS_PROC_STATUS_SPR() t->proc_status = __insn_mfspr(SPR_PROC_STATUS); #endif +#if !CHIP_HAS_FIXED_INTVEC_BASE() + t->interrupt_vector_base = __insn_mfspr(SPR_INTERRUPT_VECTOR_BASE_0); +#endif +#if CHIP_HAS_TILE_RTF_HWM() + t->tile_rtf_hwm = __insn_mfspr(SPR_TILE_RTF_HWM); +#endif +#if CHIP_HAS_DSTREAM_PF() + t->dstream_pf = __insn_mfspr(SPR_DSTREAM_PF); +#endif } static void restore_arch_state(const struct thread_struct *t) @@ -428,14 +437,14 @@ static void restore_arch_state(const struct thread_struct *t) #if CHIP_HAS_PROC_STATUS_SPR() __insn_mtspr(SPR_PROC_STATUS, t->proc_status); #endif +#if !CHIP_HAS_FIXED_INTVEC_BASE() + __insn_mtspr(SPR_INTERRUPT_VECTOR_BASE_0, t->interrupt_vector_base); +#endif #if CHIP_HAS_TILE_RTF_HWM() - /* - * Clear this whenever we switch back to a process in case - * the previous process was monkeying with it. Even if enabled - * in CBOX_MSR1 via TILE_RTF_HWM_MIN, it's still just a - * performance hint, so isn't worth a full save/restore. - */ - __insn_mtspr(SPR_TILE_RTF_HWM, 0); + __insn_mtspr(SPR_TILE_RTF_HWM, t->tile_rtf_hwm); +#endif +#if CHIP_HAS_DSTREAM_PF() + __insn_mtspr(SPR_DSTREAM_PF, t->dstream_pf); #endif } |