10afacde3Sarnd@arndb.de #define DEBUG 20afacde3Sarnd@arndb.de 3ce8ab854SArnd Bergmann #include <linux/wait.h> 4ce8ab854SArnd Bergmann #include <linux/ptrace.h> 5ce8ab854SArnd Bergmann 6ce8ab854SArnd Bergmann #include <asm/spu.h> 7c6730ed4SJeremy Kerr #include <asm/spu_priv1.h> 8c6730ed4SJeremy Kerr #include <asm/io.h> 9cfff5b23SDave Jones #include <asm/unistd.h> 10ce8ab854SArnd Bergmann 11ce8ab854SArnd Bergmann #include "spufs.h" 12ce8ab854SArnd Bergmann 13ce8ab854SArnd Bergmann /* interrupt-level stop callback function. */ 14ce8ab854SArnd Bergmann void spufs_stop_callback(struct spu *spu) 15ce8ab854SArnd Bergmann { 16ce8ab854SArnd Bergmann struct spu_context *ctx = spu->ctx; 17ce8ab854SArnd Bergmann 18ce8ab854SArnd Bergmann wake_up_all(&ctx->stop_wq); 19ce8ab854SArnd Bergmann } 20ce8ab854SArnd Bergmann 21ce8ab854SArnd Bergmann static inline int spu_stopped(struct spu_context *ctx, u32 * stat) 22ce8ab854SArnd Bergmann { 23ce8ab854SArnd Bergmann struct spu *spu; 24ce8ab854SArnd Bergmann u64 pte_fault; 25ce8ab854SArnd Bergmann 26ce8ab854SArnd Bergmann *stat = ctx->ops->status_read(ctx); 27ce8ab854SArnd Bergmann if (ctx->state != SPU_STATE_RUNNABLE) 28ce8ab854SArnd Bergmann return 1; 29ce8ab854SArnd Bergmann spu = ctx->spu; 30ce8ab854SArnd Bergmann pte_fault = spu->dsisr & 31ce8ab854SArnd Bergmann (MFC_DSISR_PTE_NOT_FOUND | MFC_DSISR_ACCESS_DENIED); 32be703177SSebastian Siewior return (!(*stat & SPU_STATUS_RUNNING) || pte_fault || spu->class_0_pending) ? 33be703177SSebastian Siewior 1 : 0; 34ce8ab854SArnd Bergmann } 35ce8ab854SArnd Bergmann 36c6730ed4SJeremy Kerr static int spu_setup_isolated(struct spu_context *ctx) 37c6730ed4SJeremy Kerr { 38c6730ed4SJeremy Kerr int ret; 39c6730ed4SJeremy Kerr u64 __iomem *mfc_cntl; 40c6730ed4SJeremy Kerr u64 sr1; 41c6730ed4SJeremy Kerr u32 status; 42c6730ed4SJeremy Kerr unsigned long timeout; 43c6730ed4SJeremy Kerr const u32 status_loading = SPU_STATUS_RUNNING 44c6730ed4SJeremy Kerr | SPU_STATUS_ISOLATED_STATE | SPU_STATUS_ISOLATED_LOAD_STATUS; 45c6730ed4SJeremy Kerr 467ec18ab9SChristoph Hellwig ret = -ENODEV; 47c6730ed4SJeremy Kerr if (!isolated_loader) 48c6730ed4SJeremy Kerr goto out; 49c6730ed4SJeremy Kerr 507ec18ab9SChristoph Hellwig /* 517ec18ab9SChristoph Hellwig * We need to exclude userspace access to the context. 527ec18ab9SChristoph Hellwig * 537ec18ab9SChristoph Hellwig * To protect against memory access we invalidate all ptes 547ec18ab9SChristoph Hellwig * and make sure the pagefault handlers block on the mutex. 557ec18ab9SChristoph Hellwig */ 567ec18ab9SChristoph Hellwig spu_unmap_mappings(ctx); 577ec18ab9SChristoph Hellwig 58c6730ed4SJeremy Kerr mfc_cntl = &ctx->spu->priv2->mfc_control_RW; 59c6730ed4SJeremy Kerr 60c6730ed4SJeremy Kerr /* purge the MFC DMA queue to ensure no spurious accesses before we 61c6730ed4SJeremy Kerr * enter kernel mode */ 62c6730ed4SJeremy Kerr timeout = jiffies + HZ; 63c6730ed4SJeremy Kerr out_be64(mfc_cntl, MFC_CNTL_PURGE_DMA_REQUEST); 64c6730ed4SJeremy Kerr while ((in_be64(mfc_cntl) & MFC_CNTL_PURGE_DMA_STATUS_MASK) 65c6730ed4SJeremy Kerr != MFC_CNTL_PURGE_DMA_COMPLETE) { 66c6730ed4SJeremy Kerr if (time_after(jiffies, timeout)) { 67c6730ed4SJeremy Kerr printk(KERN_ERR "%s: timeout flushing MFC DMA queue\n", 68c6730ed4SJeremy Kerr __FUNCTION__); 69c6730ed4SJeremy Kerr ret = -EIO; 707ec18ab9SChristoph Hellwig goto out; 71c6730ed4SJeremy Kerr } 72c6730ed4SJeremy Kerr cond_resched(); 73c6730ed4SJeremy Kerr } 74c6730ed4SJeremy Kerr 75c6730ed4SJeremy Kerr /* put the SPE in kernel mode to allow access to the loader */ 76c6730ed4SJeremy Kerr sr1 = spu_mfc_sr1_get(ctx->spu); 77c6730ed4SJeremy Kerr sr1 &= ~MFC_STATE1_PROBLEM_STATE_MASK; 78c6730ed4SJeremy Kerr spu_mfc_sr1_set(ctx->spu, sr1); 79c6730ed4SJeremy Kerr 80c6730ed4SJeremy Kerr /* start the loader */ 81c6730ed4SJeremy Kerr ctx->ops->signal1_write(ctx, (unsigned long)isolated_loader >> 32); 82c6730ed4SJeremy Kerr ctx->ops->signal2_write(ctx, 83c6730ed4SJeremy Kerr (unsigned long)isolated_loader & 0xffffffff); 84c6730ed4SJeremy Kerr 85c6730ed4SJeremy Kerr ctx->ops->runcntl_write(ctx, 86c6730ed4SJeremy Kerr SPU_RUNCNTL_RUNNABLE | SPU_RUNCNTL_ISOLATE); 87c6730ed4SJeremy Kerr 88c6730ed4SJeremy Kerr ret = 0; 89c6730ed4SJeremy Kerr timeout = jiffies + HZ; 90c6730ed4SJeremy Kerr while (((status = ctx->ops->status_read(ctx)) & status_loading) == 91c6730ed4SJeremy Kerr status_loading) { 92c6730ed4SJeremy Kerr if (time_after(jiffies, timeout)) { 93c6730ed4SJeremy Kerr printk(KERN_ERR "%s: timeout waiting for loader\n", 94c6730ed4SJeremy Kerr __FUNCTION__); 95c6730ed4SJeremy Kerr ret = -EIO; 96c6730ed4SJeremy Kerr goto out_drop_priv; 97c6730ed4SJeremy Kerr } 98c6730ed4SJeremy Kerr cond_resched(); 99c6730ed4SJeremy Kerr } 100c6730ed4SJeremy Kerr 101c6730ed4SJeremy Kerr if (!(status & SPU_STATUS_RUNNING)) { 102c6730ed4SJeremy Kerr /* If isolated LOAD has failed: run SPU, we will get a stop-and 103c6730ed4SJeremy Kerr * signal later. */ 104c6730ed4SJeremy Kerr pr_debug("%s: isolated LOAD failed\n", __FUNCTION__); 105c6730ed4SJeremy Kerr ctx->ops->runcntl_write(ctx, SPU_RUNCNTL_RUNNABLE); 106c6730ed4SJeremy Kerr ret = -EACCES; 1077ec18ab9SChristoph Hellwig goto out_drop_priv; 1087ec18ab9SChristoph Hellwig } 109c6730ed4SJeremy Kerr 1107ec18ab9SChristoph Hellwig if (!(status & SPU_STATUS_ISOLATED_STATE)) { 111c6730ed4SJeremy Kerr /* This isn't allowed by the CBEA, but check anyway */ 112c6730ed4SJeremy Kerr pr_debug("%s: SPU fell out of isolated mode?\n", __FUNCTION__); 113c6730ed4SJeremy Kerr ctx->ops->runcntl_write(ctx, SPU_RUNCNTL_STOP); 114c6730ed4SJeremy Kerr ret = -EINVAL; 1157ec18ab9SChristoph Hellwig goto out_drop_priv; 116c6730ed4SJeremy Kerr } 117c6730ed4SJeremy Kerr 118c6730ed4SJeremy Kerr out_drop_priv: 119c6730ed4SJeremy Kerr /* Finished accessing the loader. Drop kernel mode */ 120c6730ed4SJeremy Kerr sr1 |= MFC_STATE1_PROBLEM_STATE_MASK; 121c6730ed4SJeremy Kerr spu_mfc_sr1_set(ctx->spu, sr1); 122c6730ed4SJeremy Kerr 123c6730ed4SJeremy Kerr out: 124c6730ed4SJeremy Kerr return ret; 125c6730ed4SJeremy Kerr } 126c6730ed4SJeremy Kerr 127aa45e256SChristoph Hellwig static int spu_run_init(struct spu_context *ctx, u32 * npc) 128ce8ab854SArnd Bergmann { 129aa45e256SChristoph Hellwig if (ctx->flags & SPU_CREATE_ISOLATE) { 130aa45e256SChristoph Hellwig unsigned long runcntl; 131ce8ab854SArnd Bergmann 132aa45e256SChristoph Hellwig if (!(ctx->ops->status_read(ctx) & SPU_STATUS_ISOLATED_STATE)) { 133aa45e256SChristoph Hellwig int ret = spu_setup_isolated(ctx); 134c6730ed4SJeremy Kerr if (ret) 135ce8ab854SArnd Bergmann return ret; 1360afacde3Sarnd@arndb.de } 137c6730ed4SJeremy Kerr 138c6730ed4SJeremy Kerr /* if userspace has set the runcntrl register (eg, to issue an 139c6730ed4SJeremy Kerr * isolated exit), we need to re-set it here */ 140c6730ed4SJeremy Kerr runcntl = ctx->ops->runcntl_read(ctx) & 141c6730ed4SJeremy Kerr (SPU_RUNCNTL_RUNNABLE | SPU_RUNCNTL_ISOLATE); 142c6730ed4SJeremy Kerr if (runcntl == 0) 143c6730ed4SJeremy Kerr runcntl = SPU_RUNCNTL_RUNNABLE; 144aa45e256SChristoph Hellwig ctx->ops->runcntl_write(ctx, runcntl); 1452eb1b120SChristoph Hellwig } else { 14605169237SBenjamin Herrenschmidt unsigned long mode = SPU_PRIVCNTL_MODE_NORMAL; 147c6730ed4SJeremy Kerr ctx->ops->npc_write(ctx, *npc); 14805169237SBenjamin Herrenschmidt if (test_thread_flag(TIF_SINGLESTEP)) 14905169237SBenjamin Herrenschmidt mode = SPU_PRIVCNTL_MODE_SINGLE_STEP; 15005169237SBenjamin Herrenschmidt out_be64(&ctx->spu->priv2->spu_privcntl_RW, mode); 151aa45e256SChristoph Hellwig ctx->ops->runcntl_write(ctx, SPU_RUNCNTL_RUNNABLE); 1522eb1b120SChristoph Hellwig } 153c6730ed4SJeremy Kerr 154aa45e256SChristoph Hellwig return 0; 155ce8ab854SArnd Bergmann } 156ce8ab854SArnd Bergmann 157aa45e256SChristoph Hellwig static int spu_run_fini(struct spu_context *ctx, u32 * npc, 158ce8ab854SArnd Bergmann u32 * status) 159ce8ab854SArnd Bergmann { 160ce8ab854SArnd Bergmann int ret = 0; 161ce8ab854SArnd Bergmann 162ce8ab854SArnd Bergmann *status = ctx->ops->status_read(ctx); 163ce8ab854SArnd Bergmann *npc = ctx->ops->npc_read(ctx); 164ce8ab854SArnd Bergmann spu_release(ctx); 165ce8ab854SArnd Bergmann 166ce8ab854SArnd Bergmann if (signal_pending(current)) 167ce8ab854SArnd Bergmann ret = -ERESTARTSYS; 1682ebb2477SMasato Noguchi 169ce8ab854SArnd Bergmann return ret; 170ce8ab854SArnd Bergmann } 171ce8ab854SArnd Bergmann 172aa45e256SChristoph Hellwig static int spu_reacquire_runnable(struct spu_context *ctx, u32 *npc, 173ce8ab854SArnd Bergmann u32 *status) 174ce8ab854SArnd Bergmann { 175ce8ab854SArnd Bergmann int ret; 176ce8ab854SArnd Bergmann 177aa45e256SChristoph Hellwig ret = spu_run_fini(ctx, npc, status); 178aa45e256SChristoph Hellwig if (ret) 179ce8ab854SArnd Bergmann return ret; 180aa45e256SChristoph Hellwig 181aa45e256SChristoph Hellwig if (*status & (SPU_STATUS_STOPPED_BY_STOP | SPU_STATUS_STOPPED_BY_HALT)) 182ce8ab854SArnd Bergmann return *status; 183aa45e256SChristoph Hellwig 184aa45e256SChristoph Hellwig ret = spu_acquire_runnable(ctx, 0); 185aa45e256SChristoph Hellwig if (ret) 186ce8ab854SArnd Bergmann return ret; 187aa45e256SChristoph Hellwig 188aa45e256SChristoph Hellwig ret = spu_run_init(ctx, npc); 189aa45e256SChristoph Hellwig if (ret) { 190aa45e256SChristoph Hellwig spu_release(ctx); 191aa45e256SChristoph Hellwig return ret; 192aa45e256SChristoph Hellwig } 193ce8ab854SArnd Bergmann return 0; 194ce8ab854SArnd Bergmann } 195ce8ab854SArnd Bergmann 1962dd14934SArnd Bergmann /* 1972dd14934SArnd Bergmann * SPU syscall restarting is tricky because we violate the basic 1982dd14934SArnd Bergmann * assumption that the signal handler is running on the interrupted 1992dd14934SArnd Bergmann * thread. Here instead, the handler runs on PowerPC user space code, 2002dd14934SArnd Bergmann * while the syscall was called from the SPU. 2012dd14934SArnd Bergmann * This means we can only do a very rough approximation of POSIX 2022dd14934SArnd Bergmann * signal semantics. 2032dd14934SArnd Bergmann */ 2042dd14934SArnd Bergmann int spu_handle_restartsys(struct spu_context *ctx, long *spu_ret, 2052dd14934SArnd Bergmann unsigned int *npc) 2062dd14934SArnd Bergmann { 2072dd14934SArnd Bergmann int ret; 2082dd14934SArnd Bergmann 2092dd14934SArnd Bergmann switch (*spu_ret) { 2102dd14934SArnd Bergmann case -ERESTARTSYS: 2112dd14934SArnd Bergmann case -ERESTARTNOINTR: 2122dd14934SArnd Bergmann /* 2132dd14934SArnd Bergmann * Enter the regular syscall restarting for 2142dd14934SArnd Bergmann * sys_spu_run, then restart the SPU syscall 2152dd14934SArnd Bergmann * callback. 2162dd14934SArnd Bergmann */ 2172dd14934SArnd Bergmann *npc -= 8; 2182dd14934SArnd Bergmann ret = -ERESTARTSYS; 2192dd14934SArnd Bergmann break; 2202dd14934SArnd Bergmann case -ERESTARTNOHAND: 2212dd14934SArnd Bergmann case -ERESTART_RESTARTBLOCK: 2222dd14934SArnd Bergmann /* 2232dd14934SArnd Bergmann * Restart block is too hard for now, just return -EINTR 2242dd14934SArnd Bergmann * to the SPU. 2252dd14934SArnd Bergmann * ERESTARTNOHAND comes from sys_pause, we also return 2262dd14934SArnd Bergmann * -EINTR from there. 2272dd14934SArnd Bergmann * Assume that we need to be restarted ourselves though. 2282dd14934SArnd Bergmann */ 2292dd14934SArnd Bergmann *spu_ret = -EINTR; 2302dd14934SArnd Bergmann ret = -ERESTARTSYS; 2312dd14934SArnd Bergmann break; 2322dd14934SArnd Bergmann default: 2332dd14934SArnd Bergmann printk(KERN_WARNING "%s: unexpected return code %ld\n", 2342dd14934SArnd Bergmann __FUNCTION__, *spu_ret); 2352dd14934SArnd Bergmann ret = 0; 2362dd14934SArnd Bergmann } 2372dd14934SArnd Bergmann return ret; 2382dd14934SArnd Bergmann } 2392dd14934SArnd Bergmann 2402dd14934SArnd Bergmann int spu_process_callback(struct spu_context *ctx) 2412dd14934SArnd Bergmann { 2422dd14934SArnd Bergmann struct spu_syscall_block s; 2432dd14934SArnd Bergmann u32 ls_pointer, npc; 2449e2fe2ceSAkinobu Mita void __iomem *ls; 2452dd14934SArnd Bergmann long spu_ret; 2462dd14934SArnd Bergmann int ret; 2472dd14934SArnd Bergmann 2482dd14934SArnd Bergmann /* get syscall block from local store */ 2499e2fe2ceSAkinobu Mita npc = ctx->ops->npc_read(ctx) & ~3; 2509e2fe2ceSAkinobu Mita ls = (void __iomem *)ctx->ops->get_ls(ctx); 2519e2fe2ceSAkinobu Mita ls_pointer = in_be32(ls + npc); 2522dd14934SArnd Bergmann if (ls_pointer > (LS_SIZE - sizeof(s))) 2532dd14934SArnd Bergmann return -EFAULT; 2549e2fe2ceSAkinobu Mita memcpy_fromio(&s, ls + ls_pointer, sizeof(s)); 2552dd14934SArnd Bergmann 2562dd14934SArnd Bergmann /* do actual syscall without pinning the spu */ 2572dd14934SArnd Bergmann ret = 0; 2582dd14934SArnd Bergmann spu_ret = -ENOSYS; 2592dd14934SArnd Bergmann npc += 4; 2602dd14934SArnd Bergmann 2612dd14934SArnd Bergmann if (s.nr_ret < __NR_syscalls) { 2622dd14934SArnd Bergmann spu_release(ctx); 2632dd14934SArnd Bergmann /* do actual system call from here */ 2642dd14934SArnd Bergmann spu_ret = spu_sys_callback(&s); 2652dd14934SArnd Bergmann if (spu_ret <= -ERESTARTSYS) { 2662dd14934SArnd Bergmann ret = spu_handle_restartsys(ctx, &spu_ret, &npc); 2672dd14934SArnd Bergmann } 2682dd14934SArnd Bergmann spu_acquire(ctx); 2692dd14934SArnd Bergmann if (ret == -ERESTARTSYS) 2702dd14934SArnd Bergmann return ret; 2712dd14934SArnd Bergmann } 2722dd14934SArnd Bergmann 2732dd14934SArnd Bergmann /* write result, jump over indirect pointer */ 2749e2fe2ceSAkinobu Mita memcpy_toio(ls + ls_pointer, &spu_ret, sizeof(spu_ret)); 2752dd14934SArnd Bergmann ctx->ops->npc_write(ctx, npc); 2762dd14934SArnd Bergmann ctx->ops->runcntl_write(ctx, SPU_RUNCNTL_RUNNABLE); 2772dd14934SArnd Bergmann return ret; 2782dd14934SArnd Bergmann } 2792dd14934SArnd Bergmann 280ce8ab854SArnd Bergmann static inline int spu_process_events(struct spu_context *ctx) 281ce8ab854SArnd Bergmann { 282ce8ab854SArnd Bergmann struct spu *spu = ctx->spu; 283ce8ab854SArnd Bergmann int ret = 0; 284ce8ab854SArnd Bergmann 285ce8ab854SArnd Bergmann if (spu->class_0_pending) 286ce8ab854SArnd Bergmann ret = spu_irq_class_0_bottom(spu); 287ce8ab854SArnd Bergmann if (!ret && signal_pending(current)) 288ce8ab854SArnd Bergmann ret = -ERESTARTSYS; 289ce8ab854SArnd Bergmann return ret; 290ce8ab854SArnd Bergmann } 291ce8ab854SArnd Bergmann 292ce8ab854SArnd Bergmann long spufs_run_spu(struct file *file, struct spu_context *ctx, 2939add11daSArnd Bergmann u32 *npc, u32 *event) 294ce8ab854SArnd Bergmann { 295ce8ab854SArnd Bergmann int ret; 2969add11daSArnd Bergmann u32 status; 297ce8ab854SArnd Bergmann 298e45d48a3SChristoph Hellwig if (mutex_lock_interruptible(&ctx->run_mutex)) 299ce8ab854SArnd Bergmann return -ERESTARTSYS; 300ce8ab854SArnd Bergmann 301ee2d7340SArnd Bergmann ctx->ops->master_start(ctx); 3029add11daSArnd Bergmann ctx->event_return = 0; 303aa45e256SChristoph Hellwig 3042cf2b3b4SChristoph Hellwig spu_acquire(ctx); 3052cf2b3b4SChristoph Hellwig if (ctx->state == SPU_STATE_SAVED) { 3062cf2b3b4SChristoph Hellwig __spu_update_sched_info(ctx); 3072cf2b3b4SChristoph Hellwig 3082cf2b3b4SChristoph Hellwig ret = spu_activate(ctx, 0); 3092cf2b3b4SChristoph Hellwig if (ret) { 3102cf2b3b4SChristoph Hellwig spu_release(ctx); 3112cf2b3b4SChristoph Hellwig goto out; 3122cf2b3b4SChristoph Hellwig } 3132cf2b3b4SChristoph Hellwig } else { 3142cf2b3b4SChristoph Hellwig /* 3152cf2b3b4SChristoph Hellwig * We have to update the scheduling priority under active_mutex 3162cf2b3b4SChristoph Hellwig * to protect against find_victim(). 3172cf2b3b4SChristoph Hellwig */ 3182cf2b3b4SChristoph Hellwig spu_update_sched_info(ctx); 3192cf2b3b4SChristoph Hellwig } 320aa45e256SChristoph Hellwig 321aa45e256SChristoph Hellwig ret = spu_run_init(ctx, npc); 322aa45e256SChristoph Hellwig if (ret) { 323aa45e256SChristoph Hellwig spu_release(ctx); 324ce8ab854SArnd Bergmann goto out; 325aa45e256SChristoph Hellwig } 326ce8ab854SArnd Bergmann 327ce8ab854SArnd Bergmann do { 3289add11daSArnd Bergmann ret = spufs_wait(ctx->stop_wq, spu_stopped(ctx, &status)); 329ce8ab854SArnd Bergmann if (unlikely(ret)) 330ce8ab854SArnd Bergmann break; 3319add11daSArnd Bergmann if ((status & SPU_STATUS_STOPPED_BY_STOP) && 3329add11daSArnd Bergmann (status >> SPU_STOP_STATUS_SHIFT == 0x2104)) { 3332dd14934SArnd Bergmann ret = spu_process_callback(ctx); 3342dd14934SArnd Bergmann if (ret) 3352dd14934SArnd Bergmann break; 3369add11daSArnd Bergmann status &= ~SPU_STATUS_STOPPED_BY_STOP; 3372dd14934SArnd Bergmann } 33857dace23SArnd Bergmann ret = spufs_handle_class1(ctx); 33957dace23SArnd Bergmann if (ret) 34057dace23SArnd Bergmann break; 34157dace23SArnd Bergmann 342ce8ab854SArnd Bergmann if (unlikely(ctx->state != SPU_STATE_RUNNABLE)) { 3439add11daSArnd Bergmann ret = spu_reacquire_runnable(ctx, npc, &status); 34437901802SChristoph Hellwig if (ret) 3452ebb2477SMasato Noguchi goto out2; 346ce8ab854SArnd Bergmann continue; 347ce8ab854SArnd Bergmann } 348ce8ab854SArnd Bergmann ret = spu_process_events(ctx); 349ce8ab854SArnd Bergmann 3509add11daSArnd Bergmann } while (!ret && !(status & (SPU_STATUS_STOPPED_BY_STOP | 35105169237SBenjamin Herrenschmidt SPU_STATUS_STOPPED_BY_HALT | 35205169237SBenjamin Herrenschmidt SPU_STATUS_SINGLE_STEP))); 353ce8ab854SArnd Bergmann 354e9f8a0b6SChristoph Hellwig if ((status & SPU_STATUS_STOPPED_BY_STOP) && 355fe2f896dSChristoph Hellwig (((status >> SPU_STOP_STATUS_SHIFT) & 0x3f00) == 0x2100) && 356fe2f896dSChristoph Hellwig (ctx->state == SPU_STATE_RUNNABLE)) 357e9f8a0b6SChristoph Hellwig ctx->stats.libassist++; 358e9f8a0b6SChristoph Hellwig 359ee2d7340SArnd Bergmann ctx->ops->master_stop(ctx); 3609add11daSArnd Bergmann ret = spu_run_fini(ctx, npc, &status); 361ce8ab854SArnd Bergmann spu_yield(ctx); 362ce8ab854SArnd Bergmann 3632ebb2477SMasato Noguchi out2: 3642ebb2477SMasato Noguchi if ((ret == 0) || 3652ebb2477SMasato Noguchi ((ret == -ERESTARTSYS) && 3662ebb2477SMasato Noguchi ((status & SPU_STATUS_STOPPED_BY_HALT) || 36705169237SBenjamin Herrenschmidt (status & SPU_STATUS_SINGLE_STEP) || 3682ebb2477SMasato Noguchi ((status & SPU_STATUS_STOPPED_BY_STOP) && 3692ebb2477SMasato Noguchi (status >> SPU_STOP_STATUS_SHIFT != 0x2104))))) 3702ebb2477SMasato Noguchi ret = status; 3712ebb2477SMasato Noguchi 37205169237SBenjamin Herrenschmidt /* Note: we don't need to force_sig SIGTRAP on single-step 37305169237SBenjamin Herrenschmidt * since we have TIF_SINGLESTEP set, thus the kernel will do 37405169237SBenjamin Herrenschmidt * it upon return from the syscall anyawy 37505169237SBenjamin Herrenschmidt */ 3762ebb2477SMasato Noguchi if ((status & SPU_STATUS_STOPPED_BY_STOP) 3772ebb2477SMasato Noguchi && (status >> SPU_STOP_STATUS_SHIFT) == 0x3fff) { 3782ebb2477SMasato Noguchi force_sig(SIGTRAP, current); 3792ebb2477SMasato Noguchi ret = -ERESTARTSYS; 3802ebb2477SMasato Noguchi } 3812ebb2477SMasato Noguchi 382ce8ab854SArnd Bergmann out: 3839add11daSArnd Bergmann *event = ctx->event_return; 384e45d48a3SChristoph Hellwig mutex_unlock(&ctx->run_mutex); 385ce8ab854SArnd Bergmann return ret; 386ce8ab854SArnd Bergmann } 387