Commit 52bf082f authored by David S. Miller's avatar David S. Miller

[SPARC64]: SUN4V hypervisor TLB flush support code.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 766f861f
......@@ -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 @@ __flush_tlb_mm: /* %o0=(ctx & TAG_CONTEXT_BITS), %o1=SECONDARY_CONTEXT */
.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 @@ __flush_tlb_pending:
.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_tlb_kernel_range: /* %o0=start, %o1=end */
flush %o3
retl
nop
nop
__spitfire_flush_tlb_mm_slow:
rdpr %pstate, %g1
......@@ -252,7 +256,63 @@ __cheetah_flush_dcache_page: /* 11 insns */
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 @@ cheetah_patch_cachetlbops:
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 @@ cheetah_patch_cachetlbops:
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 @@ cheetah_patch_cachetlbops:
*/
.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 @@ xcall_flush_tlb_mm:
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 @@ xcall_flush_tlb_pending:
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 @@ xcall_flush_tlb_kernel_range:
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 @@ xcall_flush_dcache_page_spitfire: /* %g1 == physical page address
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 @@ xcall_capture:
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
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