diff options
author | David S. Miller <davem@sunset.davemloft.net> | 2006-02-08 16:41:20 -0800 |
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committer | David S. Miller <davem@sunset.davemloft.net> | 2006-03-20 01:12:02 -0800 |
commit | 1d2f1f90a1e004b0c1b8a73ed4394a93f09104b3 (patch) | |
tree | 2fcc0840b52218631020311d7b6d785e9a15db6a /arch/sparc64 | |
parent | 5b0c0572fcd6204675c5f7ddfa572b5017f817dd (diff) |
[SPARC64]: Sun4v cross-call sending support.
Technically the hypervisor call supports sending in a list
of all cpus to get the cross-call, but I only pass in one
cpu at a time for now.
The multi-cpu support is there, just ifdef'd out so it's easy to
enable or delete it later.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64')
-rw-r--r-- | arch/sparc64/kernel/irq.c | 22 | ||||
-rw-r--r-- | arch/sparc64/kernel/smp.c | 125 | ||||
-rw-r--r-- | arch/sparc64/kernel/traps.c | 6 |
3 files changed, 151 insertions, 2 deletions
diff --git a/arch/sparc64/kernel/irq.c b/arch/sparc64/kernel/irq.c index ff201c007e0..c80d2531ec4 100644 --- a/arch/sparc64/kernel/irq.c +++ b/arch/sparc64/kernel/irq.c @@ -900,6 +900,24 @@ static void __cpuinit init_one_kbuf(unsigned long *pa_ptr) *pa_ptr = __pa(page); } +static void __cpuinit init_cpu_send_mondo_info(struct trap_per_cpu *tb) +{ +#ifdef CONFIG_SMP + unsigned long page; + + BUILD_BUG_ON((NR_CPUS * sizeof(u16)) > (PAGE_SIZE - 64)); + + page = get_zeroed_page(GFP_ATOMIC); + if (!page) { + prom_printf("SUN4V: Error, cannot allocate cpu mondo page.\n"); + prom_halt(); + } + + tb->cpu_mondo_block_pa = __pa(page); + tb->cpu_list_pa = __pa(page + 64); +#endif +} + /* Allocate and init the mondo and error queues for this cpu. */ void __cpuinit sun4v_init_mondo_queues(void) { @@ -908,10 +926,14 @@ void __cpuinit sun4v_init_mondo_queues(void) init_one_mondo(&tb->cpu_mondo_pa, HV_CPU_QUEUE_CPU_MONDO); init_one_mondo(&tb->dev_mondo_pa, HV_CPU_QUEUE_DEVICE_MONDO); + init_one_mondo(&tb->resum_mondo_pa, HV_CPU_QUEUE_RES_ERROR); init_one_kbuf(&tb->resum_kernel_buf_pa); + init_one_mondo(&tb->nonresum_mondo_pa, HV_CPU_QUEUE_NONRES_ERROR); init_one_kbuf(&tb->nonresum_kernel_buf_pa); + + init_cpu_send_mondo_info(tb); } /* Only invoked on boot processor. */ diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c index 223cc6bd369..c10a3a8639e 100644 --- a/arch/sparc64/kernel/smp.c +++ b/arch/sparc64/kernel/smp.c @@ -531,10 +531,133 @@ retry: } } +#if 0 +/* Multi-cpu list version. */ +static int init_cpu_list(u16 *list, cpumask_t mask) +{ + int i, cnt; + + cnt = 0; + for_each_cpu_mask(i, mask) + list[cnt++] = i; + + return cnt; +} + +static int update_cpu_list(u16 *list, int orig_cnt, cpumask_t mask) +{ + int i; + + for (i = 0; i < orig_cnt; i++) { + if (list[i] == 0xffff) + cpu_clear(i, mask); + } + + return init_cpu_list(list, mask); +} + +static void hypervisor_xcall_deliver(u64 data0, u64 data1, u64 data2, cpumask_t mask) +{ + int this_cpu = get_cpu(); + struct trap_per_cpu *tb = &trap_block[this_cpu]; + u64 *mondo = __va(tb->cpu_mondo_block_pa); + u16 *cpu_list = __va(tb->cpu_list_pa); + int cnt, retries; + + mondo[0] = data0; + mondo[1] = data1; + mondo[2] = data2; + wmb(); + + retries = 0; + cnt = init_cpu_list(cpu_list, mask); + do { + register unsigned long func __asm__("%o0"); + register unsigned long arg0 __asm__("%o1"); + register unsigned long arg1 __asm__("%o2"); + register unsigned long arg2 __asm__("%o3"); + + func = HV_FAST_CPU_MONDO_SEND; + arg0 = cnt; + arg1 = tb->cpu_list_pa; + arg2 = tb->cpu_mondo_block_pa; + + __asm__ __volatile__("ta %8" + : "=&r" (func), "=&r" (arg0), + "=&r" (arg1), "=&r" (arg2) + : "0" (func), "1" (arg0), + "2" (arg1), "3" (arg2), + "i" (HV_FAST_TRAP) + : "memory"); + if (likely(func == HV_EOK)) + break; + + if (unlikely(++retries > 100)) { + printk("CPU[%d]: sun4v mondo error %lu\n", + this_cpu, func); + break; + } + + cnt = update_cpu_list(cpu_list, cnt, mask); + + udelay(2 * cnt); + } while (1); + + put_cpu(); +} +#else +/* Single-cpu list version. */ static void hypervisor_xcall_deliver(u64 data0, u64 data1, u64 data2, cpumask_t mask) { - /* XXX implement me */ + int this_cpu = get_cpu(); + struct trap_per_cpu *tb = &trap_block[this_cpu]; + u64 *mondo = __va(tb->cpu_mondo_block_pa); + u16 *cpu_list = __va(tb->cpu_list_pa); + int i; + + mondo[0] = data0; + mondo[1] = data1; + mondo[2] = data2; + wmb(); + + for_each_cpu_mask(i, mask) { + int retries = 0; + + do { + register unsigned long func __asm__("%o0"); + register unsigned long arg0 __asm__("%o1"); + register unsigned long arg1 __asm__("%o2"); + register unsigned long arg2 __asm__("%o3"); + + cpu_list[0] = i; + func = HV_FAST_CPU_MONDO_SEND; + arg0 = 1; + arg1 = tb->cpu_list_pa; + arg2 = tb->cpu_mondo_block_pa; + + __asm__ __volatile__("ta %8" + : "=&r" (func), "=&r" (arg0), + "=&r" (arg1), "=&r" (arg2) + : "0" (func), "1" (arg0), + "2" (arg1), "3" (arg2), + "i" (HV_FAST_TRAP) + : "memory"); + if (likely(func == HV_EOK)) + break; + + if (unlikely(++retries > 100)) { + printk("CPU[%d]: sun4v mondo error %lu\n", + this_cpu, func); + break; + } + + udelay(2 * i); + } while (1); + } + + put_cpu(); } +#endif /* Send cross call to all processors mentioned in MASK * except self. diff --git a/arch/sparc64/kernel/traps.c b/arch/sparc64/kernel/traps.c index 5417ff1b934..ac171161e79 100644 --- a/arch/sparc64/kernel/traps.c +++ b/arch/sparc64/kernel/traps.c @@ -2377,7 +2377,11 @@ void __init trap_init(void) (TRAP_PER_CPU_NONRESUM_KBUF_PA != offsetof(struct trap_per_cpu, nonresum_kernel_buf_pa)) || (TRAP_PER_CPU_FAULT_INFO != - offsetof(struct trap_per_cpu, fault_info))) + offsetof(struct trap_per_cpu, fault_info)) || + (TRAP_PER_CPU_CPU_MONDO_BLOCK_PA != + offsetof(struct trap_per_cpu, cpu_mondo_block_pa)) || + (TRAP_PER_CPU_CPU_LIST_PA != + offsetof(struct trap_per_cpu, cpu_list_pa))) trap_per_cpu_offsets_are_bolixed_dave(); /* Attach to the address space of init_task. On SMP we |