[SPARC64]: SUN4V hypervisor TLB flush support code.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc64/mm/ultra.S b/arch/sparc64/mm/ultra.S
index 269ed57..cac58d6 100644
--- a/arch/sparc64/mm/ultra.S
+++ b/arch/sparc64/mm/ultra.S
@@ -15,6 +15,7 @@
#include <asm/head.h>
#include <asm/thread_info.h>
#include <asm/cacheflush.h>
+#include <asm/hypervisor.h>
/* Basically, most of the Spitfire vs. Cheetah madness
* has to do with the fact that Cheetah does not support
@@ -29,7 +30,8 @@
.text
.align 32
.globl __flush_tlb_mm
-__flush_tlb_mm: /* %o0=(ctx & TAG_CONTEXT_BITS), %o1=SECONDARY_CONTEXT */
+__flush_tlb_mm: /* 18 insns */
+ /* %o0=(ctx & TAG_CONTEXT_BITS), %o1=SECONDARY_CONTEXT */
ldxa [%o1] ASI_DMMU, %g2
cmp %g2, %o0
bne,pn %icc, __spitfire_flush_tlb_mm_slow
@@ -52,7 +54,7 @@
.align 32
.globl __flush_tlb_pending
-__flush_tlb_pending:
+__flush_tlb_pending: /* 26 insns */
/* %o0 = context, %o1 = nr, %o2 = vaddrs[] */
rdpr %pstate, %g7
sllx %o1, 3, %o1
@@ -84,7 +86,8 @@
.align 32
.globl __flush_tlb_kernel_range
-__flush_tlb_kernel_range: /* %o0=start, %o1=end */
+__flush_tlb_kernel_range: /* 14 insns */
+ /* %o0=start, %o1=end */
cmp %o0, %o1
be,pn %xcc, 2f
sethi %hi(PAGE_SIZE), %o4
@@ -100,6 +103,7 @@
flush %o3
retl
nop
+ nop
__spitfire_flush_tlb_mm_slow:
rdpr %pstate, %g1
@@ -252,7 +256,63 @@
nop
#endif /* DCACHE_ALIASING_POSSIBLE */
-cheetah_patch_one:
+ /* Hypervisor specific versions, patched at boot time. */
+__hypervisor_flush_tlb_mm: /* 8 insns */
+ mov %o0, %o2 /* ARG2: mmu context */
+ mov 0, %o0 /* ARG0: CPU lists unimplemented */
+ mov 0, %o1 /* ARG1: CPU lists unimplemented */
+ mov HV_MMU_ALL, %o3 /* ARG3: flags */
+ mov HV_FAST_MMU_DEMAP_CTX, %o5
+ ta HV_FAST_TRAP
+ retl
+ nop
+
+__hypervisor_flush_tlb_pending: /* 15 insns */
+ /* %o0 = context, %o1 = nr, %o2 = vaddrs[] */
+ sllx %o1, 3, %g1
+ mov %o2, %g2
+ mov %o0, %g3
+1: sub %g1, (1 << 3), %g1
+ ldx [%g2 + %g1], %o0 /* ARG0: vaddr + IMMU-bit */
+ mov %g3, %o1 /* ARG1: mmu context */
+ mov HV_MMU_DMMU, %o2
+ andcc %o0, 1, %g0
+ movne %icc, HV_MMU_ALL, %o2 /* ARG2: flags */
+ andn %o0, 1, %o0
+ ta HV_MMU_UNMAP_ADDR_TRAP
+ brnz,pt %g1, 1b
+ nop
+ retl
+ nop
+
+__hypervisor_flush_tlb_kernel_range: /* 14 insns */
+ /* %o0=start, %o1=end */
+ cmp %o0, %o1
+ be,pn %xcc, 2f
+ sethi %hi(PAGE_SIZE), %g3
+ mov %o0, %g1
+ sub %o1, %g1, %g2
+ sub %g2, %g3, %g2
+1: add %g1, %g2, %o0 /* ARG0: virtual address */
+ mov 0, %o1 /* ARG1: mmu context */
+ mov HV_MMU_ALL, %o2 /* ARG2: flags */
+ ta HV_MMU_UNMAP_ADDR_TRAP
+ brnz,pt %g2, 1b
+ sub %g2, %g3, %g2
+2: retl
+ nop
+
+#ifdef DCACHE_ALIASING_POSSIBLE
+ /* XXX Niagara and friends have an 8K cache, so no aliasing is
+ * XXX possible, but nothing explicit in the Hypervisor API
+ * XXX guarantees this.
+ */
+__hypervisor_flush_dcache_page: /* 2 insns */
+ retl
+ nop
+#endif
+
+tlb_patch_one:
1: lduw [%o1], %g1
stw %g1, [%o0]
flush %o0
@@ -271,14 +331,14 @@
or %o0, %lo(__flush_tlb_mm), %o0
sethi %hi(__cheetah_flush_tlb_mm), %o1
or %o1, %lo(__cheetah_flush_tlb_mm), %o1
- call cheetah_patch_one
+ call tlb_patch_one
mov 19, %o2
sethi %hi(__flush_tlb_pending), %o0
or %o0, %lo(__flush_tlb_pending), %o0
sethi %hi(__cheetah_flush_tlb_pending), %o1
or %o1, %lo(__cheetah_flush_tlb_pending), %o1
- call cheetah_patch_one
+ call tlb_patch_one
mov 27, %o2
#ifdef DCACHE_ALIASING_POSSIBLE
@@ -286,7 +346,7 @@
or %o0, %lo(__flush_dcache_page), %o0
sethi %hi(__cheetah_flush_dcache_page), %o1
or %o1, %lo(__cheetah_flush_dcache_page), %o1
- call cheetah_patch_one
+ call tlb_patch_one
mov 11, %o2
#endif /* DCACHE_ALIASING_POSSIBLE */
@@ -309,7 +369,7 @@
*/
.align 32
.globl xcall_flush_tlb_mm
-xcall_flush_tlb_mm:
+xcall_flush_tlb_mm: /* 18 insns */
mov PRIMARY_CONTEXT, %g2
ldxa [%g2] ASI_DMMU, %g3
srlx %g3, CTX_PGSZ1_NUC_SHIFT, %g4
@@ -321,9 +381,16 @@
stxa %g0, [%g4] ASI_IMMU_DEMAP
stxa %g3, [%g2] ASI_DMMU
retry
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
.globl xcall_flush_tlb_pending
-xcall_flush_tlb_pending:
+xcall_flush_tlb_pending: /* 20 insns */
/* %g5=context, %g1=nr, %g7=vaddrs[] */
sllx %g1, 3, %g1
mov PRIMARY_CONTEXT, %g4
@@ -348,7 +415,7 @@
retry
.globl xcall_flush_tlb_kernel_range
-xcall_flush_tlb_kernel_range:
+xcall_flush_tlb_kernel_range: /* 22 insns */
sethi %hi(PAGE_SIZE - 1), %g2
or %g2, %lo(PAGE_SIZE - 1), %g2
andn %g1, %g2, %g1
@@ -365,6 +432,12 @@
retry
nop
nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
/* This runs in a very controlled environment, so we do
* not need to worry about BH races etc.
@@ -458,6 +531,76 @@
nop
nop
+ .globl __hypervisor_xcall_flush_tlb_mm
+__hypervisor_xcall_flush_tlb_mm: /* 18 insns */
+ /* %g5=ctx, g1,g2,g3,g4,g7=scratch, %g6=unusable */
+ mov %o0, %g2
+ mov %o1, %g3
+ mov %o2, %g4
+ mov %o3, %g1
+ mov %o5, %g7
+ clr %o0 /* ARG0: CPU lists unimplemented */
+ clr %o1 /* ARG1: CPU lists unimplemented */
+ mov %g5, %o2 /* ARG2: mmu context */
+ mov HV_MMU_ALL, %o3 /* ARG3: flags */
+ mov HV_FAST_MMU_DEMAP_CTX, %o5
+ ta HV_FAST_TRAP
+ mov %g2, %o0
+ mov %g3, %o1
+ mov %g4, %o2
+ mov %g1, %o3
+ mov %g7, %o5
+ membar #Sync
+ retry
+
+ .globl __hypervisor_xcall_flush_tlb_pending
+__hypervisor_xcall_flush_tlb_pending: /* 18 insns */
+ /* %g5=ctx, %g1=nr, %g7=vaddrs[], %g2,%g3,%g4=scratch, %g6=unusable */
+ sllx %g1, 3, %g1
+ mov %o0, %g2
+ mov %o1, %g3
+ mov %o2, %g4
+1: sub %g1, (1 << 3), %g1
+ ldx [%g7 + %g1], %o0 /* ARG0: virtual address */
+ mov %g5, %o1 /* ARG1: mmu context */
+ mov HV_MMU_DMMU, %o2
+ andcc %o0, 1, %g0
+ movne %icc, HV_MMU_ALL, %o2 /* ARG2: flags */
+ ta HV_MMU_UNMAP_ADDR_TRAP
+ brnz,pt %g1, 1b
+ nop
+ mov %g2, %o0
+ mov %g3, %o1
+ mov %g4, %o2
+ membar #Sync
+ retry
+
+ .globl __hypervisor_xcall_flush_tlb_kernel_range
+__hypervisor_xcall_flush_tlb_kernel_range: /* 22 insns */
+ /* %g1=start, %g7=end, g2,g3,g4,g5=scratch, g6=unusable */
+ sethi %hi(PAGE_SIZE - 1), %g2
+ or %g2, %lo(PAGE_SIZE - 1), %g2
+ andn %g1, %g2, %g1
+ andn %g7, %g2, %g7
+ sub %g7, %g1, %g3
+ add %g2, 1, %g2
+ sub %g3, %g2, %g3
+ mov %o0, %g2
+ mov %o1, %g4
+ mov %o2, %g5
+1: add %g1, %g3, %o0 /* ARG0: virtual address */
+ mov 0, %o1 /* ARG1: mmu context */
+ mov HV_MMU_ALL, %o2 /* ARG2: flags */
+ ta HV_MMU_UNMAP_ADDR_TRAP
+ sethi %hi(PAGE_SIZE), %o2
+ brnz,pt %g3, 1b
+ sub %g3, %o2, %g3
+ mov %g2, %o0
+ mov %g4, %o1
+ mov %g5, %o2
+ membar #Sync
+ retry
+
/* These just get rescheduled to PIL vectors. */
.globl xcall_call_function
xcall_call_function:
@@ -475,3 +618,64 @@
retry
#endif /* CONFIG_SMP */
+
+
+ .globl hypervisor_patch_cachetlbops
+hypervisor_patch_cachetlbops:
+ save %sp, -128, %sp
+
+ sethi %hi(__flush_tlb_mm), %o0
+ or %o0, %lo(__flush_tlb_mm), %o0
+ sethi %hi(__hypervisor_flush_tlb_mm), %o1
+ or %o1, %lo(__hypervisor_flush_tlb_mm), %o1
+ call tlb_patch_one
+ mov 8, %o2
+
+ sethi %hi(__flush_tlb_pending), %o0
+ or %o0, %lo(__flush_tlb_pending), %o0
+ sethi %hi(__hypervisor_flush_tlb_pending), %o1
+ or %o1, %lo(__hypervisor_flush_tlb_pending), %o1
+ call tlb_patch_one
+ mov 15, %o2
+
+ sethi %hi(__flush_tlb_kernel_range), %o0
+ or %o0, %lo(__flush_tlb_kernel_range), %o0
+ sethi %hi(__hypervisor_flush_tlb_kernel_range), %o1
+ or %o1, %lo(__hypervisor_flush_tlb_kernel_range), %o1
+ call tlb_patch_one
+ mov 14, %o2
+
+#ifdef DCACHE_ALIASING_POSSIBLE
+ sethi %hi(__flush_dcache_page), %o0
+ or %o0, %lo(__flush_dcache_page), %o0
+ sethi %hi(__hypervisor_flush_dcache_page), %o1
+ or %o1, %lo(__hypervisor_flush_dcache_page), %o1
+ call tlb_patch_one
+ mov 2, %o2
+#endif /* DCACHE_ALIASING_POSSIBLE */
+
+#ifdef CONFIG_SMP
+ sethi %hi(xcall_flush_tlb_mm), %o0
+ or %o0, %lo(xcall_flush_tlb_mm), %o0
+ sethi %hi(__hypervisor_xcall_flush_tlb_mm), %o1
+ or %o1, %lo(__hypervisor_xcall_flush_tlb_mm), %o1
+ call tlb_patch_one
+ mov 18, %o2
+
+ sethi %hi(xcall_flush_tlb_pending), %o0
+ or %o0, %lo(xcall_flush_tlb_pending), %o0
+ sethi %hi(__hypervisor_xcall_flush_tlb_pending), %o1
+ or %o1, %lo(__hypervisor_xcall_flush_tlb_pending), %o1
+ call tlb_patch_one
+ mov 18, %o2
+
+ sethi %hi(xcall_flush_tlb_kernel_range), %o0
+ or %o0, %lo(xcall_flush_tlb_kernel_range), %o0
+ sethi %hi(__hypervisor_xcall_flush_tlb_kernel_range), %o1
+ or %o1, %lo(__hypervisor_xcall_flush_tlb_kernel_range), %o1
+ call tlb_patch_one
+ mov 22, %o2
+#endif /* CONFIG_SMP */
+
+ ret
+ restore