From 96651896b8d9ad4244a1c3ed9691faa3e382f503 Mon Sep 17 00:00:00 2001 From: Xiantao Zhang Date: Thu, 3 Apr 2008 11:02:58 -0700 Subject: [IA64] Add API for allocating Dynamic TR resource. Dynamic TR resource should be managed in the uniform way. Add two interfaces for kernel: ia64_itr_entry: Allocate a (pair of) TR for caller. ia64_ptr_entry: Purge a (pair of ) TR by caller. Signed-off-by: Xiantao Zhang Signed-off-by: Anthony Xu Signed-off-by: Tony Luck --- arch/ia64/kernel/mca.c | 49 ++++++++++++ arch/ia64/kernel/mca_asm.S | 5 ++ arch/ia64/mm/tlb.c | 196 +++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 250 insertions(+) (limited to 'arch') diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c index 6c18221dba3..607006a6a97 100644 --- a/arch/ia64/kernel/mca.c +++ b/arch/ia64/kernel/mca.c @@ -97,6 +97,7 @@ #include #include +#include #include "mca_drv.h" #include "entry.h" @@ -112,6 +113,7 @@ DEFINE_PER_CPU(u64, ia64_mca_data); /* == __per_cpu_mca[smp_processor_id()] */ DEFINE_PER_CPU(u64, ia64_mca_per_cpu_pte); /* PTE to map per-CPU area */ DEFINE_PER_CPU(u64, ia64_mca_pal_pte); /* PTE to map PAL code */ DEFINE_PER_CPU(u64, ia64_mca_pal_base); /* vaddr PAL code granule */ +DEFINE_PER_CPU(u64, ia64_mca_tr_reload); /* Flag for TR reload */ unsigned long __per_cpu_mca[NR_CPUS]; @@ -1182,6 +1184,49 @@ all_in: return; } +/* mca_insert_tr + * + * Switch rid when TR reload and needed! + * iord: 1: itr, 2: itr; + * +*/ +static void mca_insert_tr(u64 iord) +{ + + int i; + u64 old_rr; + struct ia64_tr_entry *p; + unsigned long psr; + int cpu = smp_processor_id(); + + psr = ia64_clear_ic(); + for (i = IA64_TR_ALLOC_BASE; i < IA64_TR_ALLOC_MAX; i++) { + p = &__per_cpu_idtrs[cpu][iord-1][i]; + if (p->pte & 0x1) { + old_rr = ia64_get_rr(p->ifa); + if (old_rr != p->rr) { + ia64_set_rr(p->ifa, p->rr); + ia64_srlz_d(); + } + ia64_ptr(iord, p->ifa, p->itir >> 2); + ia64_srlz_i(); + if (iord & 0x1) { + ia64_itr(0x1, i, p->ifa, p->pte, p->itir >> 2); + ia64_srlz_i(); + } + if (iord & 0x2) { + ia64_itr(0x2, i, p->ifa, p->pte, p->itir >> 2); + ia64_srlz_i(); + } + if (old_rr != p->rr) { + ia64_set_rr(p->ifa, old_rr); + ia64_srlz_d(); + } + } + } + ia64_set_psr(psr); +} + /* * ia64_mca_handler * @@ -1271,6 +1316,10 @@ ia64_mca_handler(struct pt_regs *regs, struct switch_stack *sw, monarch_cpu = -1; #endif } + if (__get_cpu_var(ia64_mca_tr_reload)) { + mca_insert_tr(0x1); /*Reload dynamic itrs*/ + mca_insert_tr(0x2); /*Reload dynamic itrs*/ + } if (notify_die(DIE_MCA_MONARCH_LEAVE, "MCA", regs, (long)&nd, 0, recover) == NOTIFY_STOP) ia64_mca_spin(__func__); diff --git a/arch/ia64/kernel/mca_asm.S b/arch/ia64/kernel/mca_asm.S index 8bc7d259e0c..a06d46548ff 100644 --- a/arch/ia64/kernel/mca_asm.S +++ b/arch/ia64/kernel/mca_asm.S @@ -219,8 +219,13 @@ ia64_reload_tr: mov r20=IA64_TR_CURRENT_STACK ;; itr.d dtr[r20]=r16 + GET_THIS_PADDR(r2, ia64_mca_tr_reload) + mov r18 = 1 ;; srlz.d + ;; + st8 [r2] =r18 + ;; done_tlb_purge_and_reload: diff --git a/arch/ia64/mm/tlb.c b/arch/ia64/mm/tlb.c index 655da240d13..3d8903f936a 100644 --- a/arch/ia64/mm/tlb.c +++ b/arch/ia64/mm/tlb.c @@ -26,6 +26,8 @@ #include #include #include +#include +#include static struct { unsigned long mask; /* mask of supported purge page-sizes */ @@ -39,6 +41,10 @@ struct ia64_ctx ia64_ctx = { }; DEFINE_PER_CPU(u8, ia64_need_tlb_flush); +DEFINE_PER_CPU(u8, ia64_tr_num); /*Number of TR slots in current processor*/ +DEFINE_PER_CPU(u8, ia64_tr_used); /*Max Slot number used by kernel*/ + +struct ia64_tr_entry __per_cpu_idtrs[NR_CPUS][2][IA64_TR_ALLOC_MAX]; /* * Initializes the ia64_ctx.bitmap array based on max_ctx+1. @@ -190,6 +196,9 @@ ia64_tlb_init (void) ia64_ptce_info_t uninitialized_var(ptce_info); /* GCC be quiet */ unsigned long tr_pgbits; long status; + pal_vm_info_1_u_t vm_info_1; + pal_vm_info_2_u_t vm_info_2; + int cpu = smp_processor_id(); if ((status = ia64_pal_vm_page_size(&tr_pgbits, &purge.mask)) != 0) { printk(KERN_ERR "PAL_VM_PAGE_SIZE failed with status=%ld; " @@ -206,4 +215,191 @@ ia64_tlb_init (void) local_cpu_data->ptce_stride[1] = ptce_info.stride[1]; local_flush_tlb_all(); /* nuke left overs from bootstrapping... */ + status = ia64_pal_vm_summary(&vm_info_1, &vm_info_2); + + if (status) { + printk(KERN_ERR "ia64_pal_vm_summary=%ld\n", status); + per_cpu(ia64_tr_num, cpu) = 8; + return; + } + per_cpu(ia64_tr_num, cpu) = vm_info_1.pal_vm_info_1_s.max_itr_entry+1; + if (per_cpu(ia64_tr_num, cpu) > + (vm_info_1.pal_vm_info_1_s.max_dtr_entry+1)) + per_cpu(ia64_tr_num, cpu) = + vm_info_1.pal_vm_info_1_s.max_dtr_entry+1; + if (per_cpu(ia64_tr_num, cpu) > IA64_TR_ALLOC_MAX) { + per_cpu(ia64_tr_num, cpu) = IA64_TR_ALLOC_MAX; + printk(KERN_DEBUG "TR register number exceeds IA64_TR_ALLOC_MAX!" + "IA64_TR_ALLOC_MAX should be extended\n"); + } +} + +/* + * is_tr_overlap + * + * Check overlap with inserted TRs. + */ +static int is_tr_overlap(struct ia64_tr_entry *p, u64 va, u64 log_size) +{ + u64 tr_log_size; + u64 tr_end; + u64 va_rr = ia64_get_rr(va); + u64 va_rid = RR_TO_RID(va_rr); + u64 va_end = va + (1<rr)) + return 0; + tr_log_size = (p->itir & 0xff) >> 2; + tr_end = p->ifa + (1< tr_end || p->ifa > va_end) + return 0; + return 1; + +} + +/* + * ia64_insert_tr in virtual mode. Allocate a TR slot + * + * target_mask : 0x1 : itr, 0x2 : dtr, 0x3 : idtr + * + * va : virtual address. + * pte : pte entries inserted. + * log_size: range to be covered. + * + * Return value: <0 : error No. + * + * >=0 : slot number allocated for TR. + * Must be called with preemption disabled. + */ +int ia64_itr_entry(u64 target_mask, u64 va, u64 pte, u64 log_size) +{ + int i, r; + unsigned long psr; + struct ia64_tr_entry *p; + int cpu = smp_processor_id(); + + r = -EINVAL; + /*Check overlap with existing TR entries*/ + if (target_mask & 0x1) { + p = &__per_cpu_idtrs[cpu][0][0]; + for (i = IA64_TR_ALLOC_BASE; i <= per_cpu(ia64_tr_used, cpu); + i++, p++) { + if (p->pte & 0x1) + if (is_tr_overlap(p, va, log_size)) { + printk(KERN_DEBUG "Overlapped Entry" + "Inserted for TR Reigster!!\n"); + goto out; + } + } + } + if (target_mask & 0x2) { + p = &__per_cpu_idtrs[cpu][1][0]; + for (i = IA64_TR_ALLOC_BASE; i <= per_cpu(ia64_tr_used, cpu); + i++, p++) { + if (p->pte & 0x1) + if (is_tr_overlap(p, va, log_size)) { + printk(KERN_DEBUG "Overlapped Entry" + "Inserted for TR Reigster!!\n"); + goto out; + } + } + } + + for (i = IA64_TR_ALLOC_BASE; i < per_cpu(ia64_tr_num, cpu); i++) { + switch (target_mask & 0x3) { + case 1: + if (!(__per_cpu_idtrs[cpu][0][i].pte & 0x1)) + goto found; + continue; + case 2: + if (!(__per_cpu_idtrs[cpu][1][i].pte & 0x1)) + goto found; + continue; + case 3: + if (!(__per_cpu_idtrs[cpu][0][i].pte & 0x1) && + !(__per_cpu_idtrs[cpu][1][i].pte & 0x1)) + goto found; + continue; + default: + r = -EINVAL; + goto out; + } + } +found: + if (i >= per_cpu(ia64_tr_num, cpu)) + return -EBUSY; + + /*Record tr info for mca hander use!*/ + if (i > per_cpu(ia64_tr_used, cpu)) + per_cpu(ia64_tr_used, cpu) = i; + + psr = ia64_clear_ic(); + if (target_mask & 0x1) { + ia64_itr(0x1, i, va, pte, log_size); + ia64_srlz_i(); + p = &__per_cpu_idtrs[cpu][0][i]; + p->ifa = va; + p->pte = pte; + p->itir = log_size << 2; + p->rr = ia64_get_rr(va); + } + if (target_mask & 0x2) { + ia64_itr(0x2, i, va, pte, log_size); + ia64_srlz_i(); + p = &__per_cpu_idtrs[cpu][1][i]; + p->ifa = va; + p->pte = pte; + p->itir = log_size << 2; + p->rr = ia64_get_rr(va); + } + ia64_set_psr(psr); + r = i; +out: + return r; +} +EXPORT_SYMBOL_GPL(ia64_itr_entry); + +/* + * ia64_purge_tr + * + * target_mask: 0x1: purge itr, 0x2 : purge dtr, 0x3 purge idtr. + * slot: slot number to be freed. + * + * Must be called with preemption disabled. + */ +void ia64_ptr_entry(u64 target_mask, int slot) +{ + int cpu = smp_processor_id(); + int i; + struct ia64_tr_entry *p; + + if (slot < IA64_TR_ALLOC_BASE || slot >= per_cpu(ia64_tr_num, cpu)) + return; + + if (target_mask & 0x1) { + p = &__per_cpu_idtrs[cpu][0][slot]; + if ((p->pte&0x1) && is_tr_overlap(p, p->ifa, p->itir>>2)) { + p->pte = 0; + ia64_ptr(0x1, p->ifa, p->itir>>2); + ia64_srlz_i(); + } + } + + if (target_mask & 0x2) { + p = &__per_cpu_idtrs[cpu][1][slot]; + if ((p->pte & 0x1) && is_tr_overlap(p, p->ifa, p->itir>>2)) { + p->pte = 0; + ia64_ptr(0x2, p->ifa, p->itir>>2); + ia64_srlz_i(); + } + } + + for (i = per_cpu(ia64_tr_used, cpu); i >= IA64_TR_ALLOC_BASE; i--) { + if ((__per_cpu_idtrs[cpu][0][i].pte & 0x1) || + (__per_cpu_idtrs[cpu][1][i].pte & 0x1)) + break; + } + per_cpu(ia64_tr_used, cpu) = i; } +EXPORT_SYMBOL_GPL(ia64_ptr_entry); -- cgit v1.2.3 From 31a6b11fed6ceec07ec4bdfefae56b8252d450cf Mon Sep 17 00:00:00 2001 From: Xiantao Zhang Date: Thu, 3 Apr 2008 11:39:43 -0700 Subject: [IA64] Implement smp_call_function_mask for ia64 This interface provides more flexible functionality for smp infrastructure ... e.g. KVM frequently needs to operate on a subset of cpus. Signed-off-by: Xiantao Zhang Signed-off-by: Tony Luck --- arch/ia64/kernel/smp.c | 82 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 82 insertions(+) (limited to 'arch') diff --git a/arch/ia64/kernel/smp.c b/arch/ia64/kernel/smp.c index 4e446aa5f4a..9a9d4c48933 100644 --- a/arch/ia64/kernel/smp.c +++ b/arch/ia64/kernel/smp.c @@ -209,6 +209,19 @@ send_IPI_allbutself (int op) } } +/* + * Called with preemption disabled. + */ +static inline void +send_IPI_mask(cpumask_t mask, int op) +{ + unsigned int cpu; + + for_each_cpu_mask(cpu, mask) { + send_IPI_single(cpu, op); + } +} + /* * Called with preemption disabled. */ @@ -401,6 +414,75 @@ smp_call_function_single (int cpuid, void (*func) (void *info), void *info, int } EXPORT_SYMBOL(smp_call_function_single); +/** + * smp_call_function_mask(): Run a function on a set of other CPUs. + * The set of cpus to run on. Must not include the current cpu. + * The function to run. This must be fast and non-blocking. + * An arbitrary pointer to pass to the function. + * If true, wait (atomically) until function + * has completed on other CPUs. + * + * Returns 0 on success, else a negative status code. + * + * If @wait is true, then returns once @func has returned; otherwise + * it returns just before the target cpu calls @func. + * + * You must not call this function with disabled interrupts or from a + * hardware interrupt handler or from a bottom half handler. + */ +int smp_call_function_mask(cpumask_t mask, + void (*func)(void *), void *info, + int wait) +{ + struct call_data_struct data; + cpumask_t allbutself; + int cpus; + + spin_lock(&call_lock); + allbutself = cpu_online_map; + cpu_clear(smp_processor_id(), allbutself); + + cpus_and(mask, mask, allbutself); + cpus = cpus_weight(mask); + if (!cpus) { + spin_unlock(&call_lock); + return 0; + } + + /* Can deadlock when called with interrupts disabled */ + WARN_ON(irqs_disabled()); + + data.func = func; + data.info = info; + atomic_set(&data.started, 0); + data.wait = wait; + if (wait) + atomic_set(&data.finished, 0); + + call_data = &data; + mb(); /* ensure store to call_data precedes setting of IPI_CALL_FUNC*/ + + /* Send a message to other CPUs */ + if (cpus_equal(mask, allbutself)) + send_IPI_allbutself(IPI_CALL_FUNC); + else + send_IPI_mask(mask, IPI_CALL_FUNC); + + /* Wait for response */ + while (atomic_read(&data.started) != cpus) + cpu_relax(); + + if (wait) + while (atomic_read(&data.finished) != cpus) + cpu_relax(); + call_data = NULL; + + spin_unlock(&call_lock); + return 0; + +} +EXPORT_SYMBOL(smp_call_function_mask); + /* * this function sends a 'generic call function' IPI to all other CPUs * in the system. -- cgit v1.2.3