diff options
| author |   Jack Steiner <steiner@sgi.com> | 2007-05-08 14:50:43 -0700 |
|---|---|---|
| committer |   Tony Luck <tony.luck@intel.com> | 2007-05-08 14:50:43 -0700 |
| commit | 3be44b9cc33d26930cb3bb014f35f582c6522481 (patch) | |
| tree | 09225c5f0fb4c6caa81bbdff216ec83a093e4d12 /arch/ia64/kernel/irq_ia64.c | |
| parent | [IA64] SPIN_LOCK_UNLOCKED macro cleanup in arch/ia64 (diff) | |
| download | wireguard-linux-3be44b9cc33d26930cb3bb014f35f582c6522481.tar.xz wireguard-linux-3be44b9cc33d26930cb3bb014f35f582c6522481.zip | |
[IA64] Optional method to purge the TLB on SN systems
This patch adds an optional method for purging the TLB on SN IA64 systems.
The change should not affect any non-SN system.
Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64/kernel/irq_ia64.c')
| -rw-r--r-- | arch/ia64/kernel/irq_ia64.c | 27 |
1 files changed, 22 insertions, 5 deletions
diff --git a/arch/ia64/kernel/irq_ia64.c b/arch/ia64/kernel/irq_ia64.c index 456f57b087ca..9a5f41be760b 100644 --- a/arch/ia64/kernel/irq_ia64.c +++ b/arch/ia64/kernel/irq_ia64.c @@ -39,6 +39,7 @@ #include <asm/machvec.h> #include <asm/pgtable.h> #include <asm/system.h> +#include <asm/tlbflush.h> #ifdef CONFIG_PERFMON # include <asm/perfmon.h> @@ -127,8 +128,10 @@ void destroy_irq(unsigned int irq) #ifdef CONFIG_SMP # define IS_RESCHEDULE(vec) (vec == IA64_IPI_RESCHEDULE) +# define IS_LOCAL_TLB_FLUSH(vec) (vec == IA64_IPI_LOCAL_TLB_FLUSH) #else # define IS_RESCHEDULE(vec) (0) +# define IS_LOCAL_TLB_FLUSH(vec) (0) #endif /* * That's where the IVT branches when we get an external @@ -180,8 +183,11 @@ ia64_handle_irq (ia64_vector vector, struct pt_regs *regs) saved_tpr = ia64_getreg(_IA64_REG_CR_TPR); ia64_srlz_d(); while (vector != IA64_SPURIOUS_INT_VECTOR) { - if (unlikely(IS_RESCHEDULE(vector))) - kstat_this_cpu.irqs[vector]++; + if (unlikely(IS_LOCAL_TLB_FLUSH(vector))) { + smp_local_flush_tlb(); + kstat_this_cpu.irqs[vector]++; + } else if (unlikely(IS_RESCHEDULE(vector))) + kstat_this_cpu.irqs[vector]++; else { ia64_setreg(_IA64_REG_CR_TPR, vector); ia64_srlz_d(); @@ -227,8 +233,11 @@ void ia64_process_pending_intr(void) * Perform normal interrupt style processing */ while (vector != IA64_SPURIOUS_INT_VECTOR) { - if (unlikely(IS_RESCHEDULE(vector))) - kstat_this_cpu.irqs[vector]++; + if (unlikely(IS_LOCAL_TLB_FLUSH(vector))) { + smp_local_flush_tlb(); + kstat_this_cpu.irqs[vector]++; + } else if (unlikely(IS_RESCHEDULE(vector))) + kstat_this_cpu.irqs[vector]++; else { struct pt_regs *old_regs = set_irq_regs(NULL); @@ -260,12 +269,12 @@ void ia64_process_pending_intr(void) #ifdef CONFIG_SMP -extern irqreturn_t handle_IPI (int irq, void *dev_id); static irqreturn_t dummy_handler (int irq, void *dev_id) { BUG(); } +extern irqreturn_t handle_IPI (int irq, void *dev_id); static struct irqaction ipi_irqaction = { .handler = handle_IPI, @@ -278,6 +287,13 @@ static struct irqaction resched_irqaction = { .flags = IRQF_DISABLED, .name = "resched" }; + +static struct irqaction tlb_irqaction = { + .handler = dummy_handler, + .flags = SA_INTERRUPT, + .name = "tlb_flush" +}; + #endif void @@ -303,6 +319,7 @@ init_IRQ (void) #ifdef CONFIG_SMP register_percpu_irq(IA64_IPI_VECTOR, &ipi_irqaction); register_percpu_irq(IA64_IPI_RESCHEDULE, &resched_irqaction); + register_percpu_irq(IA64_IPI_LOCAL_TLB_FLUSH, &tlb_irqaction); #endif #ifdef CONFIG_PERFMON pfm_init_percpu(); |