sgi-gru: support multiple pagesizes in GRU
Add multiple pagesize support to the GRU driver.
Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/misc/sgi-gru/grufault.c b/drivers/misc/sgi-gru/grufault.c
index 15507d3..ab11855 100644
--- a/drivers/misc/sgi-gru/grufault.c
+++ b/drivers/misc/sgi-gru/grufault.c
@@ -360,6 +360,13 @@
if (ret == -2)
goto failupm;
+ if (!(gts->ts_sizeavail & GRU_SIZEAVAIL(pageshift))) {
+ gts->ts_sizeavail |= GRU_SIZEAVAIL(pageshift);
+ if (atomic || !gru_update_cch(gts, 0)) {
+ gts->ts_force_cch_reload = 1;
+ goto failupm;
+ }
+ }
gru_cb_set_istatus_active(cb);
tfh_write_restart(tfh, gpa, GAA_RAM, vaddr, asid, write,
GRU_PAGESIZE(pageshift));
@@ -535,6 +542,14 @@
gts->ts_force_unload = 1;
}
+ /*
+ * CCH may contain stale data if ts_force_cch_reload is set.
+ */
+ if (gts->ts_gru && gts->ts_force_cch_reload) {
+ gru_update_cch(gts, 0);
+ gts->ts_force_cch_reload = 0;
+ }
+
ret = -EAGAIN;
cbrnum = thread_cbr_number(gts, ucbnum);
if (gts->ts_force_unload) {
diff --git a/drivers/misc/sgi-gru/gruhandles.c b/drivers/misc/sgi-gru/gruhandles.c
index 9dcf5d8..9b7ccb3 100644
--- a/drivers/misc/sgi-gru/gruhandles.c
+++ b/drivers/misc/sgi-gru/gruhandles.c
@@ -72,42 +72,16 @@
return status;
}
-#if defined CONFIG_IA64
-static void cch_allocate_set_asids(
- struct gru_context_configuration_handle *cch, int asidval)
+int cch_allocate(struct gru_context_configuration_handle *cch,
+ int asidval, int sizeavail, unsigned long cbrmap,
+ unsigned long dsrmap)
{
int i;
for (i = 0; i < 8; i++) {
cch->asid[i] = (asidval++);
-#if 0
- /* ZZZ hugepages not supported yet */
- if (i == RGN_HPAGE)
- cch->sizeavail[i] = GRU_SIZEAVAIL(hpage_shift);
- else
-#endif
- cch->sizeavail[i] = GRU_SIZEAVAIL(PAGE_SHIFT);
+ cch->sizeavail[i] = sizeavail;
}
-}
-#elif defined CONFIG_X86_64
-static void cch_allocate_set_asids(
- struct gru_context_configuration_handle *cch, int asidval)
-{
- int i;
-
- for (i = 0; i < 8; i++) {
- cch->asid[i] = asidval++;
- cch->sizeavail[i] = GRU_SIZEAVAIL(PAGE_SHIFT) |
- GRU_SIZEAVAIL(21);
- }
-}
-#endif
-
-int cch_allocate(struct gru_context_configuration_handle *cch,
- int asidval, unsigned long cbrmap,
- unsigned long dsrmap)
-{
- cch_allocate_set_asids(cch, asidval);
cch->dsr_allocation_map = dsrmap;
cch->cbr_allocation_map = cbrmap;
cch->opc = CCHOP_ALLOCATE;
diff --git a/drivers/misc/sgi-gru/gruhandles.h b/drivers/misc/sgi-gru/gruhandles.h
index dfce8ea..1ed74d7 100644
--- a/drivers/misc/sgi-gru/gruhandles.h
+++ b/drivers/misc/sgi-gru/gruhandles.h
@@ -496,7 +496,7 @@
#define GRUMAXINVAL 1024UL
int cch_allocate(struct gru_context_configuration_handle *cch,
- int asidval, unsigned long cbrmap, unsigned long dsrmap);
+ int asidval, int sizeavail, unsigned long cbrmap, unsigned long dsrmap);
int cch_start(struct gru_context_configuration_handle *cch);
int cch_interrupt(struct gru_context_configuration_handle *cch);
diff --git a/drivers/misc/sgi-gru/grukservices.c b/drivers/misc/sgi-gru/grukservices.c
index 6b1efe4..d8bd7d8 100644
--- a/drivers/misc/sgi-gru/grukservices.c
+++ b/drivers/misc/sgi-gru/grukservices.c
@@ -672,7 +672,7 @@
cch->tlb_int_enable = 0;
cch->tfm_done_bit_enable = 0;
cch->unmap_enable = 1;
- err = cch_allocate(cch, 0, cbr_map, dsr_map);
+ err = cch_allocate(cch, 0, 0, cbr_map, dsr_map);
if (err) {
gru_dbg(grudev,
"Unable to allocate kernel CCH: gid %d, err %d\n",
diff --git a/drivers/misc/sgi-gru/grumain.c b/drivers/misc/sgi-gru/grumain.c
index 5fc7b5e..ec3f7a1 100644
--- a/drivers/misc/sgi-gru/grumain.c
+++ b/drivers/misc/sgi-gru/grumain.c
@@ -326,6 +326,7 @@
gts->ts_vma = vma;
gts->ts_tlb_int_select = -1;
gts->ts_gms = gru_register_mmu_notifier();
+ gts->ts_sizeavail = GRU_SIZEAVAIL(PAGE_SHIFT);
if (!gts->ts_gms)
goto err;
@@ -552,7 +553,8 @@
cch->tlb_int_select = gts->ts_tlb_int_select;
}
cch->tfm_done_bit_enable = 0;
- err = cch_allocate(cch, asid, gts->ts_cbr_map, gts->ts_dsr_map);
+ err = cch_allocate(cch, asid, gts->ts_sizeavail, gts->ts_cbr_map,
+ gts->ts_dsr_map);
if (err) {
gru_dbg(grudev,
"err %d: cch %p, gts %p, cbr 0x%lx, dsr 0x%lx\n",
@@ -573,11 +575,12 @@
/*
* Update fields in an active CCH:
* - retarget interrupts on local blade
+ * - update sizeavail mask
* - force a delayed context unload by clearing the CCH asids. This
* forces TLB misses for new GRU instructions. The context is unloaded
* when the next TLB miss occurs.
*/
-static int gru_update_cch(struct gru_thread_state *gts, int int_select)
+int gru_update_cch(struct gru_thread_state *gts, int force_unload)
{
struct gru_context_configuration_handle *cch;
struct gru_state *gru = gts->ts_gru;
@@ -591,9 +594,11 @@
goto exit;
if (cch_interrupt(cch))
BUG();
- if (int_select >= 0) {
- gts->ts_tlb_int_select = int_select;
- cch->tlb_int_select = int_select;
+ if (!force_unload) {
+ for (i = 0; i < 8; i++)
+ 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();
} else {
for (i = 0; i < 8; i++)
cch->asid[i] = 0;
@@ -625,7 +630,7 @@
gru_dbg(grudev, "retarget from %d to %d\n", gts->ts_tlb_int_select,
gru_cpu_fault_map_id());
- return gru_update_cch(gts, gru_cpu_fault_map_id());
+ return gru_update_cch(gts, 0);
}
diff --git a/drivers/misc/sgi-gru/grutables.h b/drivers/misc/sgi-gru/grutables.h
index 8e5c8e5..bf1eeb7 100644
--- a/drivers/misc/sgi-gru/grutables.h
+++ b/drivers/misc/sgi-gru/grutables.h
@@ -361,6 +361,7 @@
long ts_user_options;/* misc user option flags */
pid_t ts_tgid_owner; /* task that is using the
context - for migration */
+ unsigned short ts_sizeavail; /* Pagesizes in use */
int ts_tsid; /* thread that owns the
structure */
int ts_tlb_int_select;/* target cpu if interrupts
@@ -374,6 +375,7 @@
required for contest */
char ts_blade; /* If >= 0, migrate context if
ref from diferent blade */
+ char ts_force_cch_reload;
char ts_force_unload;/* force context to be unloaded
after migration */
char ts_cbr_idx[GRU_CBR_AU];/* CBR numbers of each
@@ -597,6 +599,7 @@
extern struct gru_thread_state *gru_alloc_thread_state(struct vm_area_struct
*vma, int tsid);
extern void gru_unload_context(struct gru_thread_state *gts, int savestate);
+extern int gru_update_cch(struct gru_thread_state *gts, int force_unload);
extern void gts_drop(struct gru_thread_state *gts);
extern void gru_tgh_flush_init(struct gru_state *gru);
extern int gru_kservices_init(struct gru_state *gru);