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-rw-r--r--arch/sparc64/kernel/dtlb_miss.S4
-rw-r--r--arch/sparc64/kernel/itlb_miss.S12
-rw-r--r--arch/sparc64/kernel/ktlb.S14
-rw-r--r--arch/sparc64/kernel/sun4v_tlb_miss.S39
-rw-r--r--arch/sparc64/kernel/tsb.S17
-rw-r--r--arch/sparc64/mm/init.c4
-rw-r--r--arch/sparc64/mm/tsb.c25
-rw-r--r--include/asm-sparc64/tsb.h8
-rw-r--r--include/asm-sparc64/ttable.h12
9 files changed, 78 insertions, 57 deletions
diff --git a/arch/sparc64/kernel/dtlb_miss.S b/arch/sparc64/kernel/dtlb_miss.S
index 2ef6f6e..09a6a15 100644
--- a/arch/sparc64/kernel/dtlb_miss.S
+++ b/arch/sparc64/kernel/dtlb_miss.S
@@ -2,10 +2,10 @@
ldxa [%g0] ASI_DMMU_TSB_8KB_PTR, %g1 ! Get TSB 8K pointer
ldxa [%g0] ASI_DMMU, %g6 ! Get TAG TARGET
srlx %g6, 48, %g5 ! Get context
+ sllx %g6, 22, %g6 ! Zero out context
brz,pn %g5, kvmap_dtlb ! Context 0 processing
- nop ! Delay slot (fill me)
+ srlx %g6, 22, %g6 ! Delay slot
TSB_LOAD_QUAD(%g1, %g4) ! Load TSB entry
- nop ! Push branch to next I$ line
cmp %g4, %g6 ! Compare TAG
/* DTLB ** ICACHE line 2: TSB compare and TLB load */
diff --git a/arch/sparc64/kernel/itlb_miss.S b/arch/sparc64/kernel/itlb_miss.S
index 730caa4..6dfe396 100644
--- a/arch/sparc64/kernel/itlb_miss.S
+++ b/arch/sparc64/kernel/itlb_miss.S
@@ -2,25 +2,25 @@
ldxa [%g0] ASI_IMMU_TSB_8KB_PTR, %g1 ! Get TSB 8K pointer
ldxa [%g0] ASI_IMMU, %g6 ! Get TAG TARGET
srlx %g6, 48, %g5 ! Get context
+ sllx %g6, 22, %g6 ! Zero out context
brz,pn %g5, kvmap_itlb ! Context 0 processing
- nop ! Delay slot (fill me)
+ srlx %g6, 22, %g6 ! Delay slot
TSB_LOAD_QUAD(%g1, %g4) ! Load TSB entry
cmp %g4, %g6 ! Compare TAG
- sethi %hi(PAGE_EXEC), %g4 ! Setup exec check
/* ITLB ** ICACHE line 2: TSB compare and TLB load */
+ sethi %hi(PAGE_EXEC), %g4 ! Setup exec check
ldx [%g4 + %lo(PAGE_EXEC)], %g4
bne,pn %xcc, tsb_miss_itlb ! Miss
mov FAULT_CODE_ITLB, %g3
andcc %g5, %g4, %g0 ! Executable?
be,pn %xcc, tsb_do_fault
nop ! Delay slot, fill me
- stxa %g5, [%g0] ASI_ITLB_DATA_IN ! Load TLB
- retry ! Trap done
+ nop
/* ITLB ** ICACHE line 3: */
- nop
- nop
+ stxa %g5, [%g0] ASI_ITLB_DATA_IN ! Load TLB
+ retry ! Trap done
nop
nop
nop
diff --git a/arch/sparc64/kernel/ktlb.S b/arch/sparc64/kernel/ktlb.S
index 47dfd45..ac29da9 100644
--- a/arch/sparc64/kernel/ktlb.S
+++ b/arch/sparc64/kernel/ktlb.S
@@ -52,8 +52,10 @@ kvmap_itlb_vmalloc_addr:
/* Load and check PTE. */
ldxa [%g5] ASI_PHYS_USE_EC, %g5
+ mov 1, %g7
+ sllx %g7, TSB_TAG_INVALID_BIT, %g7
brgez,a,pn %g5, kvmap_itlb_longpath
- KTSB_STORE(%g1, %g0)
+ KTSB_STORE(%g1, %g7)
KTSB_WRITE(%g1, %g5, %g6)
@@ -146,8 +148,10 @@ kvmap_dtlb_vmalloc_addr:
/* Load and check PTE. */
ldxa [%g5] ASI_PHYS_USE_EC, %g5
+ mov 1, %g7
+ sllx %g7, TSB_TAG_INVALID_BIT, %g7
brgez,a,pn %g5, kvmap_dtlb_longpath
- KTSB_STORE(%g1, %g0)
+ KTSB_STORE(%g1, %g7)
KTSB_WRITE(%g1, %g5, %g6)
@@ -215,8 +219,8 @@ kvmap_dtlb_longpath:
wrpr %g5, PSTATE_AG | PSTATE_MG, %pstate
.section .sun4v_2insn_patch, "ax"
.word 661b
- nop
- nop
+ SET_GL(1)
+ ldxa [%g0] ASI_SCRATCHPAD, %g5
.previous
rdpr %tl, %g3
@@ -226,7 +230,7 @@ kvmap_dtlb_longpath:
ldxa [%g4] ASI_DMMU, %g5
.section .sun4v_2insn_patch, "ax"
.word 661b
- mov %g4, %g5
+ ldx [%g5 + HV_FAULT_D_ADDR_OFFSET], %g5
nop
.previous
diff --git a/arch/sparc64/kernel/sun4v_tlb_miss.S b/arch/sparc64/kernel/sun4v_tlb_miss.S
index 244d50d..57ccdae 100644
--- a/arch/sparc64/kernel/sun4v_tlb_miss.S
+++ b/arch/sparc64/kernel/sun4v_tlb_miss.S
@@ -16,15 +16,14 @@
ldx [BASE + HV_FAULT_D_ADDR_OFFSET], VADDR; \
ldx [BASE + HV_FAULT_D_CTX_OFFSET], CTX;
- /* DEST = (CTX << 48) | (VADDR >> 22)
+ /* DEST = (VADDR >> 22)
*
* Branch to ZERO_CTX_LABEL is context is zero.
*/
-#define COMPUTE_TAG_TARGET(DEST, VADDR, CTX, TMP, ZERO_CTX_LABEL) \
- srlx VADDR, 22, TMP; \
- sllx CTX, 48, DEST; \
+#define COMPUTE_TAG_TARGET(DEST, VADDR, CTX, ZERO_CTX_LABEL) \
+ srlx VADDR, 22, DEST; \
brz,pn CTX, ZERO_CTX_LABEL; \
- or DEST, TMP, DEST;
+ nop;
/* Create TSB pointer. This is something like:
*
@@ -53,7 +52,7 @@ sun4v_itlb_miss:
ldxa [%g1] ASI_SCRATCHPAD, %g1
LOAD_ITLB_INFO(%g2, %g4, %g5)
- COMPUTE_TAG_TARGET(%g6, %g4, %g5, %g3, kvmap_itlb_4v)
+ COMPUTE_TAG_TARGET(%g6, %g4, %g5, kvmap_itlb_4v)
COMPUTE_TSB_PTR(%g1, %g4, %g3, %g7)
/* Load TSB tag/pte into %g2/%g3 and compare the tag. */
@@ -72,15 +71,15 @@ sun4v_itlb_miss:
*
* %g3: PTE
* %g4: vaddr
- * %g6: TAG TARGET (only "CTX << 48" part matters)
*/
sun4v_itlb_load:
+ ldxa [%g0] ASI_SCRATCHPAD, %g6
mov %o0, %g1 ! save %o0
mov %o1, %g2 ! save %o1
mov %o2, %g5 ! save %o2
mov %o3, %g7 ! save %o3
mov %g4, %o0 ! vaddr
- srlx %g6, 48, %o1 ! ctx
+ ldx [%g6 + HV_FAULT_I_CTX_OFFSET], %o1 ! ctx
mov %g3, %o2 ! PTE
mov HV_MMU_IMMU, %o3 ! flags
ta HV_MMU_MAP_ADDR_TRAP
@@ -101,7 +100,7 @@ sun4v_dtlb_miss:
ldxa [%g1] ASI_SCRATCHPAD, %g1
LOAD_DTLB_INFO(%g2, %g4, %g5)
- COMPUTE_TAG_TARGET(%g6, %g4, %g5, %g3, kvmap_dtlb_4v)
+ COMPUTE_TAG_TARGET(%g6, %g4, %g5, kvmap_dtlb_4v)
COMPUTE_TSB_PTR(%g1, %g4, %g3, %g7)
/* Load TSB tag/pte into %g2/%g3 and compare the tag. */
@@ -115,15 +114,15 @@ sun4v_dtlb_miss:
*
* %g3: PTE
* %g4: vaddr
- * %g6: TAG TARGET (only "CTX << 48" part matters)
*/
sun4v_dtlb_load:
+ ldxa [%g0] ASI_SCRATCHPAD, %g6
mov %o0, %g1 ! save %o0
mov %o1, %g2 ! save %o1
mov %o2, %g5 ! save %o2
mov %o3, %g7 ! save %o3
mov %g4, %o0 ! vaddr
- srlx %g6, 48, %o1 ! ctx
+ ldx [%g6 + HV_FAULT_D_CTX_OFFSET], %o1 ! ctx
mov %g3, %o2 ! PTE
mov HV_MMU_DMMU, %o3 ! flags
ta HV_MMU_MAP_ADDR_TRAP
@@ -136,16 +135,18 @@ sun4v_dtlb_load:
retry
sun4v_dtlb_prot:
+ SET_GL(1)
+
/* Load MMU Miss base into %g2. */
- ldxa [%g0] ASI_SCRATCHPAD, %g2
+ ldxa [%g0] ASI_SCRATCHPAD, %g5
- ldx [%g2 + HV_FAULT_D_ADDR_OFFSET], %g5
+ ldx [%g5 + HV_FAULT_D_ADDR_OFFSET], %g5
rdpr %tl, %g1
cmp %g1, 1
- bgu,pn %xcc, winfix_trampoline
+ bgu,pn %xcc, winfix_trampoline
nop
- ba,pt %xcc, sparc64_realfault_common
- mov FAULT_CODE_DTLB | FAULT_CODE_WRITE, %g4
+ ba,pt %xcc, sparc64_realfault_common
+ mov FAULT_CODE_DTLB | FAULT_CODE_WRITE, %g4
/* Called from trap table with TAG TARGET placed into
* %g6, SCRATCHPAD_UTSBREG1 contents in %g1, and
@@ -189,7 +190,8 @@ sun4v_itlb_error:
sethi %hi(sun4v_err_itlb_vaddr), %g1
stx %g4, [%g1 + %lo(sun4v_err_itlb_vaddr)]
sethi %hi(sun4v_err_itlb_ctx), %g1
- srlx %g6, 48, %o1 ! ctx
+ ldxa [%g0] ASI_SCRATCHPAD, %g6
+ ldx [%g6 + HV_FAULT_I_CTX_OFFSET], %o1
stx %o1, [%g1 + %lo(sun4v_err_itlb_ctx)]
sethi %hi(sun4v_err_itlb_pte), %g1
stx %g3, [%g1 + %lo(sun4v_err_itlb_pte)]
@@ -214,7 +216,8 @@ sun4v_dtlb_error:
sethi %hi(sun4v_err_dtlb_vaddr), %g1
stx %g4, [%g1 + %lo(sun4v_err_dtlb_vaddr)]
sethi %hi(sun4v_err_dtlb_ctx), %g1
- srlx %g6, 48, %o1 ! ctx
+ ldxa [%g0] ASI_SCRATCHPAD, %g6
+ ldx [%g6 + HV_FAULT_D_CTX_OFFSET], %o1
stx %o1, [%g1 + %lo(sun4v_err_dtlb_ctx)]
sethi %hi(sun4v_err_dtlb_pte), %g1
stx %g3, [%g1 + %lo(sun4v_err_dtlb_pte)]
diff --git a/arch/sparc64/kernel/tsb.S b/arch/sparc64/kernel/tsb.S
index a17259c..cc225c0 100644
--- a/arch/sparc64/kernel/tsb.S
+++ b/arch/sparc64/kernel/tsb.S
@@ -36,7 +36,7 @@ tsb_miss_itlb:
/* At this point we have:
* %g4 -- missing virtual address
* %g1 -- TSB entry address
- * %g6 -- TAG TARGET ((vaddr >> 22) | (ctx << 48))
+ * %g6 -- TAG TARGET (vaddr >> 22)
*/
tsb_miss_page_table_walk:
TRAP_LOAD_PGD_PHYS(%g7, %g5)
@@ -50,8 +50,10 @@ tsb_reload:
/* Load and check PTE. */
ldxa [%g5] ASI_PHYS_USE_EC, %g5
+ mov 1, %g7
+ sllx %g7, TSB_TAG_INVALID_BIT, %g7
brgez,a,pn %g5, tsb_do_fault
- TSB_STORE(%g1, %g0)
+ TSB_STORE(%g1, %g7)
/* If it is larger than the base page size, don't
* bother putting it into the TSB.
@@ -62,8 +64,10 @@ tsb_reload:
sethi %hi(_PAGE_SZBITS), %g7
ldx [%g7 + %lo(_PAGE_SZBITS)], %g7
cmp %g2, %g7
+ mov 1, %g7
+ sllx %g7, TSB_TAG_INVALID_BIT, %g7
bne,a,pn %xcc, tsb_tlb_reload
- TSB_STORE(%g1, %g0)
+ TSB_STORE(%g1, %g7)
TSB_WRITE(%g1, %g5, %g6)
@@ -136,7 +140,7 @@ tsb_do_fault:
.section .sun4v_2insn_patch, "ax"
.word 661b
SET_GL(1)
- ldxa [%g0] ASI_SCRATCHPAD, %g2
+ ldxa [%g0] ASI_SCRATCHPAD, %g4
.previous
bne,pn %xcc, tsb_do_itlb_fault
@@ -150,7 +154,7 @@ tsb_do_dtlb_fault:
ldxa [%g4] ASI_DMMU, %g5
.section .sun4v_2insn_patch, "ax"
.word 661b
- ldx [%g2 + HV_FAULT_D_ADDR_OFFSET], %g5
+ ldx [%g4 + HV_FAULT_D_ADDR_OFFSET], %g5
nop
.previous
@@ -217,8 +221,9 @@ tsb_flush:
bne,pn %icc, 1b
membar #LoadLoad
cmp %g1, %o1
+ mov 1, %o3
bne,pt %xcc, 2f
- clr %o3
+ sllx %o3, TSB_TAG_INVALID_BIT, %o3
TSB_CAS_TAG(%o0, %g1, %o3)
cmp %g1, %o3
bne,pn %xcc, 1b
diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c
index bd9e320..aa2aec6 100644
--- a/arch/sparc64/mm/init.c
+++ b/arch/sparc64/mm/init.c
@@ -296,7 +296,7 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t p
tsb = &mm->context.tsb[(address >> PAGE_SHIFT) &
(mm->context.tsb_nentries - 1UL)];
- tag = (address >> 22UL) | CTX_HWBITS(mm->context) << 48UL;
+ tag = (address >> 22UL);
tsb_insert(tsb, tag, pte_val(pte));
}
}
@@ -1110,6 +1110,8 @@ void __init paging_init(void)
kern_base = (prom_boot_mapping_phys_low >> 22UL) << 22UL;
kern_size = (unsigned long)&_end - (unsigned long)KERNBASE;
+ memset(swapper_tsb, 0x40, sizeof(swapper_tsb));
+
if (tlb_type == hypervisor)
sun4v_pgprot_init();
else
diff --git a/arch/sparc64/mm/tsb.c b/arch/sparc64/mm/tsb.c
index 3c1ff05..353cb06 100644
--- a/arch/sparc64/mm/tsb.c
+++ b/arch/sparc64/mm/tsb.c
@@ -20,9 +20,9 @@ static inline unsigned long tsb_hash(unsigned long vaddr, unsigned long nentries
return vaddr & (nentries - 1);
}
-static inline int tag_compare(unsigned long tag, unsigned long vaddr, unsigned long context)
+static inline int tag_compare(unsigned long tag, unsigned long vaddr)
{
- return (tag == ((vaddr >> 22) | (context << 48)));
+ return (tag == (vaddr >> 22));
}
/* TSB flushes need only occur on the processor initiating the address
@@ -38,8 +38,8 @@ void flush_tsb_kernel_range(unsigned long start, unsigned long end)
unsigned long hash = tsb_hash(v, KERNEL_TSB_NENTRIES);
struct tsb *ent = &swapper_tsb[hash];
- if (tag_compare(ent->tag, v, 0)) {
- ent->tag = 0UL;
+ if (tag_compare(ent->tag, v)) {
+ ent->tag = (1UL << TSB_TAG_INVALID_BIT);
membar_storeload_storestore();
}
}
@@ -50,14 +50,9 @@ void flush_tsb_user(struct mmu_gather *mp)
struct mm_struct *mm = mp->mm;
struct tsb *tsb = mm->context.tsb;
unsigned long nentries = mm->context.tsb_nentries;
- unsigned long ctx, base;
+ unsigned long base;
int i;
- if (unlikely(!CTX_VALID(mm->context)))
- return;
-
- ctx = CTX_HWBITS(mm->context);
-
if (tlb_type == cheetah_plus || tlb_type == hypervisor)
base = __pa(tsb);
else
@@ -71,7 +66,7 @@ void flush_tsb_user(struct mmu_gather *mp)
hash = tsb_hash(v, nentries);
ent = base + (hash * sizeof(struct tsb));
- tag = (v >> 22UL) | (ctx << 48UL);
+ tag = (v >> 22UL);
tsb_flush(ent, tag);
}
@@ -243,7 +238,8 @@ static void copy_tsb(struct tsb *old_tsb, unsigned long old_size,
"i" (ASI_NUCLEUS_QUAD_LDD));
}
- if (!tag || (tag & (1UL << TSB_TAG_LOCK_BIT)))
+ if (tag & ((1UL << TSB_TAG_LOCK_BIT) |
+ (1UL << TSB_TAG_INVALID_BIT)))
continue;
/* We only put base page size PTEs into the TSB,
@@ -315,10 +311,13 @@ void tsb_grow(struct mm_struct *mm, unsigned long rss, gfp_t gfp_flags)
break;
}
- page = alloc_pages(gfp_flags | __GFP_ZERO, get_order(size));
+ page = alloc_pages(gfp_flags, get_order(size));
if (unlikely(!page))
return;
+ /* Mark all tags as invalid. */
+ memset(page_address(page), 0x40, size);
+
if (size == max_tsb_size)
mm->context.tsb_rss_limit = ~0UL;
else
diff --git a/include/asm-sparc64/tsb.h b/include/asm-sparc64/tsb.h
index 7f3abc3..6e67680 100644
--- a/include/asm-sparc64/tsb.h
+++ b/include/asm-sparc64/tsb.h
@@ -12,6 +12,8 @@
*
* ldxa [%g0] ASI_{D,I}MMU_TSB_8KB_PTR, %g1
* ldxa [%g0] ASI_{D,I}MMU, %g6
+ * sllx %g6, 22, %g6
+ * srlx %g6, 22, %g6
* ldda [%g1] ASI_NUCLEUS_QUAD_LDD, %g4
* cmp %g4, %g6
* bne,pn %xcc, tsb_miss_{d,i}tlb
@@ -29,6 +31,9 @@
* -------------------------------------------------
* 63 61 60 48 47 42 41 0
*
+ * But actually, since we use per-mm TSB's, we zero out the CONTEXT
+ * field.
+ *
* Like the powerpc hashtables we need to use locking in order to
* synchronize while we update the entries. PTE updates need locking
* as well.
@@ -42,6 +47,9 @@
#define TSB_TAG_LOCK_BIT 47
#define TSB_TAG_LOCK_HIGH (1 << (TSB_TAG_LOCK_BIT - 32))
+#define TSB_TAG_INVALID_BIT 46
+#define TSB_TAG_INVALID_HIGH (1 << (TSB_TAG_INVALID_BIT - 32))
+
#define TSB_MEMBAR membar #StoreStore
/* Some cpus support physical address quad loads. We want to use
diff --git a/include/asm-sparc64/ttable.h b/include/asm-sparc64/ttable.h
index 9e28b24..2d5e3c4 100644
--- a/include/asm-sparc64/ttable.h
+++ b/include/asm-sparc64/ttable.h
@@ -184,20 +184,20 @@
ldxa [%g0] ASI_SCRATCHPAD, %g2; \
ldx [%g2 + HV_FAULT_I_ADDR_OFFSET], %g4; \
ldx [%g2 + HV_FAULT_I_CTX_OFFSET], %g5; \
- srlx %g4, 22, %g7; \
- sllx %g5, 48, %g6; \
+ srlx %g4, 22, %g6; \
ba,pt %xcc, sun4v_itsb_miss; \
- or %g6, %g7, %g6; \
+ nop; \
+ nop; \
nop;
#define SUN4V_DTSB_MISS \
ldxa [%g0] ASI_SCRATCHPAD, %g2; \
ldx [%g2 + HV_FAULT_D_ADDR_OFFSET], %g4; \
ldx [%g2 + HV_FAULT_D_CTX_OFFSET], %g5; \
- srlx %g4, 22, %g7; \
- sllx %g5, 48, %g6; \
+ srlx %g4, 22, %g6; \
ba,pt %xcc, sun4v_dtsb_miss; \
- or %g6, %g7, %g6; \
+ nop; \
+ nop; \
nop;
/* Before touching these macros, you owe it to yourself to go and
generated by cgit v0.10.2 at 2024-11-11 03:46:00 (GMT)