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Commit 2a3a5f5d authored by David S. Miller's avatar David S. Miller
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[SPARC64]: Bulletproof hypervisor TLB flushing. 

Check TLB flush hypervisor calls for errors and report them.

Pass HV_MMU_ALL always for now, we can add back the optimization
to avoid the I-TLB flush later.

Always explicitly page align the virtual address arguments.
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 6cc80cfa
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Showing with 80 additions and 26 deletions
arch/sparc64/kernel/traps.c
View file @ 2a3a5f5d
......@@ -1968,6 +1968,18 @@ void sun4v_dtlb_error_report(struct pt_regs *regs, int tl)
prom_halt();
}
void hypervisor_tlbop_error(unsigned long err, unsigned long op)
{
printk(KERN_CRIT "SUN4V: TLB hv call error %lu for op %lu\n",
err, op);
}
void hypervisor_tlbop_error_xcall(unsigned long err, unsigned long op)
{
printk(KERN_CRIT "SUN4V: XCALL TLB hv call error %lu for op %lu\n",
err, op);
}
void do_fpe_common(struct pt_regs *regs)
{
if (regs->tstate & TSTATE_PRIV) {
......
arch/sparc64/mm/ultra.S
View file @ 2a3a5f5d
......@@ -257,17 +257,27 @@ __cheetah_flush_dcache_page: /* 11 insns */
#endif /* DCACHE_ALIASING_POSSIBLE */
/* Hypervisor specific versions, patched at boot time. */
__hypervisor_flush_tlb_mm: /* 8 insns */
__hypervisor_tlb_tl0_error:
save %sp, -192, %sp
mov %i0, %o0
call hypervisor_tlbop_error
mov %i1, %o1
ret
restore
__hypervisor_flush_tlb_mm: /* 10 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
brnz,pn %o0, __hypervisor_tlb_tl0_error
mov HV_FAST_MMU_DEMAP_CTX, %o1
retl
nop
__hypervisor_flush_tlb_pending: /* 15 insns */
__hypervisor_flush_tlb_pending: /* 16 insns */
/* %o0 = context, %o1 = nr, %o2 = vaddrs[] */
sllx %o1, 3, %g1
mov %o2, %g2
......@@ -275,17 +285,18 @@ __hypervisor_flush_tlb_pending: /* 15 insns */
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
mov HV_MMU_ALL, %o2 /* ARG2: flags */
srlx %o0, PAGE_SHIFT, %o0
sllx %o0, PAGE_SHIFT, %o0
ta HV_MMU_UNMAP_ADDR_TRAP
brnz,pn %o0, __hypervisor_tlb_tl0_error
mov HV_MMU_UNMAP_ADDR_TRAP, %o1
brnz,pt %g1, 1b
nop
retl
nop
__hypervisor_flush_tlb_kernel_range: /* 14 insns */
__hypervisor_flush_tlb_kernel_range: /* 16 insns */
/* %o0=start, %o1=end */
cmp %o0, %o1
be,pn %xcc, 2f
......@@ -297,6 +308,8 @@ __hypervisor_flush_tlb_kernel_range: /* 14 insns */
mov 0, %o1 /* ARG1: mmu context */
mov HV_MMU_ALL, %o2 /* ARG2: flags */
ta HV_MMU_UNMAP_ADDR_TRAP
brnz,pn %o0, __hypervisor_tlb_tl0_error
mov HV_MMU_UNMAP_ADDR_TRAP, %o1
brnz,pt %g2, 1b
sub %g2, %g3, %g2
2: retl
......@@ -369,7 +382,7 @@ cheetah_patch_cachetlbops:
*/
.align 32
.globl xcall_flush_tlb_mm
xcall_flush_tlb_mm: /* 18 insns */
xcall_flush_tlb_mm: /* 21 insns */
mov PRIMARY_CONTEXT, %g2
ldxa [%g2] ASI_DMMU, %g3
srlx %g3, CTX_PGSZ1_NUC_SHIFT, %g4
......@@ -388,9 +401,12 @@ xcall_flush_tlb_mm: /* 18 insns */
nop
nop
nop
nop
nop
nop
.globl xcall_flush_tlb_pending
xcall_flush_tlb_pending: /* 20 insns */
xcall_flush_tlb_pending: /* 21 insns */
/* %g5=context, %g1=nr, %g7=vaddrs[] */
sllx %g1, 3, %g1
mov PRIMARY_CONTEXT, %g4
......@@ -413,9 +429,10 @@ xcall_flush_tlb_pending: /* 20 insns */
nop
stxa %g2, [%g4] ASI_DMMU
retry
nop
.globl xcall_flush_tlb_kernel_range
xcall_flush_tlb_kernel_range: /* 22 insns */
xcall_flush_tlb_kernel_range: /* 25 insns */
sethi %hi(PAGE_SIZE - 1), %g2
or %g2, %lo(PAGE_SIZE - 1), %g2
andn %g1, %g2, %g1
......@@ -438,6 +455,9 @@ xcall_flush_tlb_kernel_range: /* 22 insns */
nop
nop
nop
nop
nop
nop
/* This runs in a very controlled environment, so we do
* not need to worry about BH races etc.
......@@ -545,8 +565,21 @@ xcall_flush_dcache_page_spitfire: /* %g1 == physical page address
nop
nop
/* %g5: error
* %g6: tlb op
*/
__hypervisor_tlb_xcall_error:
mov %g5, %g4
mov %g6, %g5
ba,pt %xcc, etrap
rd %pc, %g7
mov %l4, %o0
call hypervisor_tlbop_error_xcall
mov %l5, %o1
ba,a,pt %xcc, rtrap_clr_l6
.globl __hypervisor_xcall_flush_tlb_mm
__hypervisor_xcall_flush_tlb_mm: /* 18 insns */
__hypervisor_xcall_flush_tlb_mm: /* 21 insns */
/* %g5=ctx, g1,g2,g3,g4,g7=scratch, %g6=unusable */
mov %o0, %g2
mov %o1, %g3
......@@ -559,6 +592,9 @@ __hypervisor_xcall_flush_tlb_mm: /* 18 insns */
mov HV_MMU_ALL, %o3 /* ARG3: flags */
mov HV_FAST_MMU_DEMAP_CTX, %o5
ta HV_FAST_TRAP
mov HV_FAST_MMU_DEMAP_CTX, %g6
brnz,pn %o0, __hypervisor_tlb_xcall_error
mov %o0, %g5
mov %g2, %o0
mov %g3, %o1
mov %g4, %o2
......@@ -568,8 +604,8 @@ __hypervisor_xcall_flush_tlb_mm: /* 18 insns */
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 */
__hypervisor_xcall_flush_tlb_pending: /* 21 insns */
/* %g5=ctx, %g1=nr, %g7=vaddrs[], %g2,%g3,%g4,g6=scratch */
sllx %g1, 3, %g1
mov %o0, %g2
mov %o1, %g3
......@@ -577,10 +613,13 @@ __hypervisor_xcall_flush_tlb_pending: /* 18 insns */
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 */
mov HV_MMU_ALL, %o2 /* ARG2: flags */
srlx %o0, PAGE_SHIFT, %o0
sllx %o0, PAGE_SHIFT, %o0
ta HV_MMU_UNMAP_ADDR_TRAP
mov HV_MMU_UNMAP_ADDR_TRAP, %g6
brnz,a,pn %o0, __hypervisor_tlb_xcall_error
mov %o0, %g5
brnz,pt %g1, 1b
nop
mov %g2, %o0
......@@ -590,8 +629,8 @@ __hypervisor_xcall_flush_tlb_pending: /* 18 insns */
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 */
__hypervisor_xcall_flush_tlb_kernel_range: /* 25 insns */
/* %g1=start, %g7=end, g2,g3,g4,g5,g6=scratch */
sethi %hi(PAGE_SIZE - 1), %g2
or %g2, %lo(PAGE_SIZE - 1), %g2
andn %g1, %g2, %g1
......@@ -601,17 +640,20 @@ __hypervisor_xcall_flush_tlb_kernel_range: /* 22 insns */
sub %g3, %g2, %g3
mov %o0, %g2
mov %o1, %g4
mov %o2, %g5
mov %o2, %g7
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
mov HV_MMU_UNMAP_ADDR_TRAP, %g6
brnz,pn %o0, __hypervisor_tlb_xcall_error
mov %o0, %g5
sethi %hi(PAGE_SIZE), %o2
brnz,pt %g3, 1b
sub %g3, %o2, %g3
mov %g2, %o0
mov %g4, %o1
mov %g5, %o2
mov %g7, %o2
membar #Sync
retry
......@@ -643,21 +685,21 @@ hypervisor_patch_cachetlbops:
sethi %hi(__hypervisor_flush_tlb_mm), %o1
or %o1, %lo(__hypervisor_flush_tlb_mm), %o1
call tlb_patch_one
mov 8, %o2
mov 10, %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
mov 16, %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
mov 16, %o2
#ifdef DCACHE_ALIASING_POSSIBLE
sethi %hi(__flush_dcache_page), %o0
......@@ -674,21 +716,21 @@ hypervisor_patch_cachetlbops:
sethi %hi(__hypervisor_xcall_flush_tlb_mm), %o1
or %o1, %lo(__hypervisor_xcall_flush_tlb_mm), %o1
call tlb_patch_one
mov 18, %o2
mov 21, %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
mov 21, %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
mov 25, %o2
#endif /* CONFIG_SMP */
ret
......
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