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-rw-r--r--drivers/misc/sgi-gru/gru_instructions.h20
-rw-r--r--drivers/misc/sgi-gru/grufault.c25
-rw-r--r--drivers/misc/sgi-gru/gruhandles.h23
-rw-r--r--drivers/misc/sgi-gru/grumain.c3
-rw-r--r--drivers/misc/sgi-gru/gruprocfs.c5
-rw-r--r--drivers/misc/sgi-gru/grutables.h2
6 files changed, 52 insertions, 26 deletions
diff --git a/drivers/misc/sgi-gru/gru_instructions.h b/drivers/misc/sgi-gru/gru_instructions.h
index 3fde33c1e8f3..2feb885ca96f 100644
--- a/drivers/misc/sgi-gru/gru_instructions.h
+++ b/drivers/misc/sgi-gru/gru_instructions.h
@@ -81,6 +81,8 @@ struct control_block_extended_exc_detail {
int exopc;
long exceptdet0;
int exceptdet1;
+ int cbrstate;
+ int cbrexecstatus;
};
/*
@@ -107,7 +109,8 @@ struct gru_instruction_bits {
unsigned char reserved2: 2;
unsigned char istatus: 2;
unsigned char isubstatus:4;
- unsigned char reserved3: 2;
+ unsigned char reserved3: 1;
+ unsigned char tlb_fault_color: 1;
/* DW 1 */
unsigned long idef4; /* 42 bits: TRi1, BufSize */
/* DW 2-6 */
@@ -253,6 +256,21 @@ struct gru_instruction {
#define CBE_CAUSE_RESPONSE_DATA_ERROR (1 << 16)
#define CBE_CAUSE_PROTOCOL_STATE_DATA_ERROR (1 << 17)
+/* CBE cbrexecstatus bits */
+#define CBR_EXS_ABORT_OCC_BIT 0
+#define CBR_EXS_INT_OCC_BIT 1
+#define CBR_EXS_PENDING_BIT 2
+#define CBR_EXS_QUEUED_BIT 3
+#define CBR_EXS_TLBHW_BIT 4
+#define CBR_EXS_EXCEPTION_BIT 5
+
+#define CBR_EXS_ABORT_OCC (1 << CBR_EXS_ABORT_OCC_BIT)
+#define CBR_EXS_INT_OCC (1 << CBR_EXS_INT_OCC_BIT)
+#define CBR_EXS_PENDING (1 << CBR_EXS_PENDING_BIT)
+#define CBR_EXS_QUEUED (1 << CBR_EXS_QUEUED_BIT)
+#define CBR_EXS_TLBHW (1 << CBR_EXS_TLBHW_BIT)
+#define CBR_EXS_EXCEPTION (1 << CBR_EXS_EXCEPTION_BIT)
+
/*
* Exceptions are retried for the following cases. If any OTHER bits are set
* in ecause, the exception is not retryable.
diff --git a/drivers/misc/sgi-gru/grufault.c b/drivers/misc/sgi-gru/grufault.c
index ab118558552e..4089f862aa29 100644
--- a/drivers/misc/sgi-gru/grufault.c
+++ b/drivers/misc/sgi-gru/grufault.c
@@ -334,6 +334,8 @@ static int gru_try_dropin(struct gru_thread_state *gts,
* Might be a hardware race OR a stupid user. Ignore FMM because FMM
* is a transient state.
*/
+ if (tfh->status != TFHSTATUS_EXCEPTION)
+ goto failnoexception;
if (tfh->state == TFHSTATE_IDLE)
goto failidle;
if (tfh->state == TFHSTATE_MISS_FMM && cb)
@@ -401,8 +403,17 @@ failfmm:
gru_dbg(grudev, "FAILED fmm tfh: 0x%p, state %d\n", tfh, tfh->state);
return 0;
+failnoexception:
+ /* TFH status did not show exception pending */
+ gru_flush_cache(tfh);
+ if (cb)
+ gru_flush_cache(cb);
+ STAT(tlb_dropin_fail_no_exception);
+ gru_dbg(grudev, "FAILED non-exception tfh: 0x%p, status %d, state %d\n", tfh, tfh->status, tfh->state);
+ return 0;
+
failidle:
- /* TFH was idle - no miss pending */
+ /* TFH state was idle - no miss pending */
gru_flush_cache(tfh);
if (cb)
gru_flush_cache(cb);
@@ -472,7 +483,8 @@ irqreturn_t gru_intr(int irq, void *dev_id)
* This is running in interrupt context. Trylock the mmap_sem.
* If it fails, retry the fault in user context.
*/
- if (down_read_trylock(&gts->ts_mm->mmap_sem)) {
+ if (!gts->ts_force_cch_reload &&
+ down_read_trylock(&gts->ts_mm->mmap_sem)) {
gru_try_dropin(gts, tfh, NULL);
up_read(&gts->ts_mm->mmap_sem);
} else {
@@ -595,14 +607,19 @@ int gru_get_exception_detail(unsigned long arg)
excdet.ecause = cbe->ecause;
excdet.exceptdet0 = cbe->idef1upd;
excdet.exceptdet1 = cbe->idef3upd;
+ excdet.cbrstate = cbe->cbrstate;
+ excdet.cbrexecstatus = cbe->cbrexecstatus;
ret = 0;
} else {
ret = -EAGAIN;
}
gru_unlock_gts(gts);
- gru_dbg(grudev, "address 0x%lx, ecause 0x%x\n", excdet.cb,
- excdet.ecause);
+ gru_dbg(grudev,
+ "cb 0x%lx, op %d, exopc %d, cbrstate %d, cbrexecstatus 0x%x, ecause 0x%x, "
+ "exdet0 0x%lx, exdet1 0x%x\n",
+ excdet.cb, excdet.opc, excdet.exopc, excdet.cbrstate, excdet.cbrexecstatus,
+ excdet.ecause, excdet.exceptdet0, excdet.exceptdet1);
if (!ret && copy_to_user((void __user *)arg, &excdet, sizeof(excdet)))
ret = -EFAULT;
return ret;
diff --git a/drivers/misc/sgi-gru/gruhandles.h b/drivers/misc/sgi-gru/gruhandles.h
index 1ed74d7508c8..03b76a1993c3 100644
--- a/drivers/misc/sgi-gru/gruhandles.h
+++ b/drivers/misc/sgi-gru/gruhandles.h
@@ -251,15 +251,14 @@ struct gru_tlb_fault_handle {
unsigned int fill1:9;
unsigned int status:2;
- unsigned int fill2:1;
- unsigned int color:1;
+ unsigned int fill2:2;
unsigned int state:3;
unsigned int fill3:1;
- unsigned int cause:7; /* DW 0 - high 32 */
+ unsigned int cause:7;
unsigned int fill4:1;
- unsigned int indexway:12;
+ unsigned int indexway:12; /* DW 0 - high 32 */
unsigned int fill5:4;
unsigned int ctxnum:4;
@@ -457,21 +456,7 @@ enum gru_cbr_state {
CBRSTATE_BUSY_INTERRUPT,
};
-/* CBE cbrexecstatus bits */
-#define CBR_EXS_ABORT_OCC_BIT 0
-#define CBR_EXS_INT_OCC_BIT 1
-#define CBR_EXS_PENDING_BIT 2
-#define CBR_EXS_QUEUED_BIT 3
-#define CBR_EXS_TLBHW_BIT 4
-#define CBR_EXS_EXCEPTION_BIT 5
-
-#define CBR_EXS_ABORT_OCC (1 << CBR_EXS_ABORT_OCC_BIT)
-#define CBR_EXS_INT_OCC (1 << CBR_EXS_INT_OCC_BIT)
-#define CBR_EXS_PENDING (1 << CBR_EXS_PENDING_BIT)
-#define CBR_EXS_QUEUED (1 << CBR_EXS_QUEUED_BIT)
-#define CBR_EXS_TLBHW (1 << CBR_EXS_TLBHW_BIT)
-#define CBR_EXS_EXCEPTION (1 << CBR_EXS_EXCEPTION_BIT)
-
+/* CBE cbrexecstatus bits - defined in gru_instructions.h*/
/* CBE ecause bits - defined in gru_instructions.h */
/*
diff --git a/drivers/misc/sgi-gru/grumain.c b/drivers/misc/sgi-gru/grumain.c
index ec3f7a17d221..374af38862e6 100644
--- a/drivers/misc/sgi-gru/grumain.c
+++ b/drivers/misc/sgi-gru/grumain.c
@@ -599,6 +599,9 @@ int gru_update_cch(struct gru_thread_state *gts, int force_unload)
cch->sizeavail[i] = gts->ts_sizeavail;
gts->ts_tlb_int_select = gru_cpu_fault_map_id();
cch->tlb_int_select = gru_cpu_fault_map_id();
+ cch->tfm_fault_bit_enable =
+ (gts->ts_user_options == GRU_OPT_MISS_FMM_POLL
+ || gts->ts_user_options == GRU_OPT_MISS_FMM_INTR);
} else {
for (i = 0; i < 8; i++)
cch->asid[i] = 0;
diff --git a/drivers/misc/sgi-gru/gruprocfs.c b/drivers/misc/sgi-gru/gruprocfs.c
index ee74821b171c..c46c1c5f0c73 100644
--- a/drivers/misc/sgi-gru/gruprocfs.c
+++ b/drivers/misc/sgi-gru/gruprocfs.c
@@ -84,6 +84,8 @@ static int statistics_show(struct seq_file *s, void *p)
printstat(s, tlb_dropin_fail_range_active);
printstat(s, tlb_dropin_fail_idle);
printstat(s, tlb_dropin_fail_fmm);
+ printstat(s, tlb_dropin_fail_no_exception);
+ printstat(s, tlb_dropin_fail_no_exception_war);
printstat(s, mmu_invalidate_range);
printstat(s, mmu_invalidate_page);
printstat(s, mmu_clear_flush_young);
@@ -158,8 +160,7 @@ static ssize_t options_write(struct file *file, const char __user *userbuf,
unsigned long val;
char buf[80];
- if (copy_from_user
- (buf, userbuf, count < sizeof(buf) ? count : sizeof(buf)))
+ if (strncpy_from_user(buf, userbuf, sizeof(buf) - 1) < 0)
return -EFAULT;
buf[count - 1] = '\0';
if (!strict_strtoul(buf, 10, &val))
diff --git a/drivers/misc/sgi-gru/grutables.h b/drivers/misc/sgi-gru/grutables.h
index bf1eeb7553ed..ebf6183c1635 100644
--- a/drivers/misc/sgi-gru/grutables.h
+++ b/drivers/misc/sgi-gru/grutables.h
@@ -207,6 +207,8 @@ struct gru_stats_s {
atomic_long_t tlb_dropin_fail_range_active;
atomic_long_t tlb_dropin_fail_idle;
atomic_long_t tlb_dropin_fail_fmm;
+ atomic_long_t tlb_dropin_fail_no_exception;
+ atomic_long_t tlb_dropin_fail_no_exception_war;
atomic_long_t mmu_invalidate_range;
atomic_long_t mmu_invalidate_page;
atomic_long_t mmu_clear_flush_young;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 15:21:17 +0100