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[SPARC64]: SUN4V memory exception trap handlers.

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Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2006-02-09 20:20:34 -08:00
parent 618e9ed98a
commit ed6b0b4543
4 changed files with 325 additions and 24 deletions
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170
arch/sparc64/kernel/sun4v_tlb_miss.S
View File

@ -237,6 +237,167 @@ sun4v_tsb_miss_common:
ba,pt %xcc, tsb_miss_page_table_walk
add %g1, %g2, %g1
/* Instruction Access Exception, tl0. */
sun4v_iacc:
mov SCRATCHPAD_CPUID, %g1
ldxa [%g1] ASI_SCRATCHPAD, %g3
sethi %hi(trap_block), %g2
or %g2, %lo(trap_block), %g2
sllx %g3, TRAP_BLOCK_SZ_SHIFT, %g3
add %g2, %g3, %g2
ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_I_TYPE_OFFSET], %g3
ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_I_ADDR_OFFSET], %g4
ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_I_CTX_OFFSET], %g5
sllx %g3, 16, %g3
or %g5, %g3, %g5
ba,pt %xcc, etrap
rd %pc, %g7
mov %l4, %o1
mov %l5, %o2
call sun4v_insn_access_exception
add %sp, PTREGS_OFF, %o0
ba,a,pt %xcc, rtrap_clr_l6
/* Instruction Access Exception, tl1. */
sun4v_iacc_tl1:
mov SCRATCHPAD_CPUID, %g1
ldxa [%g1] ASI_SCRATCHPAD, %g3
sethi %hi(trap_block), %g2
or %g2, %lo(trap_block), %g2
sllx %g3, TRAP_BLOCK_SZ_SHIFT, %g3
add %g2, %g3, %g2
ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_I_TYPE_OFFSET], %g3
ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_I_ADDR_OFFSET], %g4
ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_I_CTX_OFFSET], %g5
sllx %g3, 16, %g3
or %g5, %g3, %g5
ba,pt %xcc, etraptl1
rd %pc, %g7
mov %l4, %o1
mov %l5, %o2
call sun4v_insn_access_exception_tl1
add %sp, PTREGS_OFF, %o0
ba,a,pt %xcc, rtrap_clr_l6
/* Data Access Exception, tl0. */
sun4v_dacc:
mov SCRATCHPAD_CPUID, %g1
ldxa [%g1] ASI_SCRATCHPAD, %g3
sethi %hi(trap_block), %g2
or %g2, %lo(trap_block), %g2
sllx %g3, TRAP_BLOCK_SZ_SHIFT, %g3
add %g2, %g3, %g2
ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_TYPE_OFFSET], %g3
ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_ADDR_OFFSET], %g4
ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_CTX_OFFSET], %g5
sllx %g3, 16, %g3
or %g5, %g3, %g5
ba,pt %xcc, etrap
rd %pc, %g7
mov %l4, %o1
mov %l5, %o2
call sun4v_data_access_exception
add %sp, PTREGS_OFF, %o0
ba,a,pt %xcc, rtrap_clr_l6
/* Data Access Exception, tl1. */
sun4v_dacc_tl1:
mov SCRATCHPAD_CPUID, %g1
ldxa [%g1] ASI_SCRATCHPAD, %g3
sethi %hi(trap_block), %g2
or %g2, %lo(trap_block), %g2
sllx %g3, TRAP_BLOCK_SZ_SHIFT, %g3
add %g2, %g3, %g2
ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_TYPE_OFFSET], %g3
ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_ADDR_OFFSET], %g4
ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_CTX_OFFSET], %g5
sllx %g3, 16, %g3
or %g5, %g3, %g5
ba,pt %xcc, etraptl1
rd %pc, %g7
mov %l4, %o1
mov %l5, %o2
call sun4v_data_access_exception_tl1
add %sp, PTREGS_OFF, %o0
ba,a,pt %xcc, rtrap_clr_l6
/* Memory Address Unaligned. */
sun4v_mna:
mov SCRATCHPAD_CPUID, %g1
ldxa [%g1] ASI_SCRATCHPAD, %g3
sethi %hi(trap_block), %g2
or %g2, %lo(trap_block), %g2
sllx %g3, TRAP_BLOCK_SZ_SHIFT, %g3
add %g2, %g3, %g2
mov HV_FAULT_TYPE_UNALIGNED, %g3
ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_ADDR_OFFSET], %g4
ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_CTX_OFFSET], %g5
sllx %g3, 16, %g3
or %g5, %g3, %g5
/* Window fixup? */
rdpr %tl, %g2
cmp %g2, 1
bgu,pn %icc, winfix_mna
rdpr %tpc, %g3
ba,pt %xcc, etrap
rd %pc, %g7
mov %l4, %o1
mov %l5, %o2
call sun4v_mna
add %sp, PTREGS_OFF, %o0
ba,a,pt %xcc, rtrap_clr_l6
/* Privileged Action. */
sun4v_privact:
ba,pt %xcc, etrap
rd %pc, %g7
call do_privact
add %sp, PTREGS_OFF, %o0
ba,a,pt %xcc, rtrap_clr_l6
/* Unaligned ldd float, tl0. */
sun4v_lddfmna:
mov SCRATCHPAD_CPUID, %g1
ldxa [%g1] ASI_SCRATCHPAD, %g3
sethi %hi(trap_block), %g2
or %g2, %lo(trap_block), %g2
sllx %g3, TRAP_BLOCK_SZ_SHIFT, %g3
add %g2, %g3, %g2
ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_TYPE_OFFSET], %g3
ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_ADDR_OFFSET], %g4
ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_CTX_OFFSET], %g5
sllx %g3, 16, %g3
or %g5, %g3, %g5
ba,pt %xcc, etrap
rd %pc, %g7
mov %l4, %o1
mov %l5, %o2
call handle_lddfmna
add %sp, PTREGS_OFF, %o0
ba,a,pt %xcc, rtrap_clr_l6
/* Unaligned std float, tl0. */
sun4v_stdfmna:
mov SCRATCHPAD_CPUID, %g1
ldxa [%g1] ASI_SCRATCHPAD, %g3
sethi %hi(trap_block), %g2
or %g2, %lo(trap_block), %g2
sllx %g3, TRAP_BLOCK_SZ_SHIFT, %g3
add %g2, %g3, %g2
ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_TYPE_OFFSET], %g3
ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_ADDR_OFFSET], %g4
ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_CTX_OFFSET], %g5
sllx %g3, 16, %g3
or %g5, %g3, %g5
ba,pt %xcc, etrap
rd %pc, %g7
mov %l4, %o1
mov %l5, %o2
call handle_stdfmna
add %sp, PTREGS_OFF, %o0
ba,a,pt %xcc, rtrap_clr_l6
#define BRANCH_ALWAYS 0x10680000
#define NOP 0x01000000
@ -265,6 +426,15 @@ sun4v_patch_tlb_handlers:
SUN4V_DO_PATCH(tl1_damiss, sun4v_dtlb_miss)
SUN4V_DO_PATCH(tl0_daprot, sun4v_dtlb_prot)
SUN4V_DO_PATCH(tl1_daprot, sun4v_dtlb_prot)
SUN4V_DO_PATCH(tl0_iax, sun4v_iacc)
SUN4V_DO_PATCH(tl1_iax, sun4v_iacc_tl1)
SUN4V_DO_PATCH(tl0_dax, sun4v_dacc)
SUN4V_DO_PATCH(tl1_dax, sun4v_dacc_tl1)
SUN4V_DO_PATCH(tl0_mna, sun4v_mna)
SUN4V_DO_PATCH(tl1_mna, sun4v_mna)
SUN4V_DO_PATCH(tl0_lddfmna, sun4v_lddfmna)
SUN4V_DO_PATCH(tl0_stdfmna, sun4v_stdfmna)
SUN4V_DO_PATCH(tl0_privact, sun4v_privact)
retl
nop
.size sun4v_patch_tlb_handlers,.-sun4v_patch_tlb_handlers

108
arch/sparc64/kernel/traps.c
View File

@ -180,6 +180,45 @@ void spitfire_insn_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr
spitfire_insn_access_exception(regs, sfsr, sfar);
}
void sun4v_insn_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
{
unsigned short type = (type_ctx >> 16);
unsigned short ctx = (type_ctx & 0xffff);
siginfo_t info;
if (notify_die(DIE_TRAP, "instruction access exception", regs,
0, 0x8, SIGTRAP) == NOTIFY_STOP)
return;
if (regs->tstate & TSTATE_PRIV) {
printk("sun4v_insn_access_exception: ADDR[%016lx] "
"CTX[%04x] TYPE[%04x], going.\n",
addr, ctx, type);
die_if_kernel("Iax", regs);
}
if (test_thread_flag(TIF_32BIT)) {
regs->tpc &= 0xffffffff;
regs->tnpc &= 0xffffffff;
}
info.si_signo = SIGSEGV;
info.si_errno = 0;
info.si_code = SEGV_MAPERR;
info.si_addr = (void __user *) addr;
info.si_trapno = 0;
force_sig_info(SIGSEGV, &info, current);
}
void sun4v_insn_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
{
if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs,
0, 0x8, SIGTRAP) == NOTIFY_STOP)
return;
dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
sun4v_insn_access_exception(regs, addr, type_ctx);
}
void spitfire_data_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
{
siginfo_t info;
@ -228,6 +267,45 @@ void spitfire_data_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr
spitfire_data_access_exception(regs, sfsr, sfar);
}
void sun4v_data_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
{
unsigned short type = (type_ctx >> 16);
unsigned short ctx = (type_ctx & 0xffff);
siginfo_t info;
if (notify_die(DIE_TRAP, "data access exception", regs,
0, 0x8, SIGTRAP) == NOTIFY_STOP)
return;
if (regs->tstate & TSTATE_PRIV) {
printk("sun4v_data_access_exception: ADDR[%016lx] "
"CTX[%04x] TYPE[%04x], going.\n",
addr, ctx, type);
die_if_kernel("Iax", regs);
}
if (test_thread_flag(TIF_32BIT)) {
regs->tpc &= 0xffffffff;
regs->tnpc &= 0xffffffff;
}
info.si_signo = SIGSEGV;
info.si_errno = 0;
info.si_code = SEGV_MAPERR;
info.si_addr = (void __user *) addr;
info.si_trapno = 0;
force_sig_info(SIGSEGV, &info, current);
}
void sun4v_data_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
{
if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs,
0, 0x8, SIGTRAP) == NOTIFY_STOP)
return;
dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
sun4v_data_access_exception(regs, addr, type_ctx);
}
#ifdef CONFIG_PCI
/* This is really pathetic... */
extern volatile int pci_poke_in_progress;
@ -2150,6 +2228,8 @@ void do_illegal_instruction(struct pt_regs *regs)
force_sig_info(SIGILL, &info, current);
}
extern void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn);
void mem_address_unaligned(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr)
{
siginfo_t info;
@ -2159,13 +2239,7 @@ void mem_address_unaligned(struct pt_regs *regs, unsigned long sfar, unsigned lo
return;
if (regs->tstate & TSTATE_PRIV) {
extern void kernel_unaligned_trap(struct pt_regs *regs,
unsigned int insn,
unsigned long sfar,
unsigned long sfsr);
kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc),
sfar, sfsr);
kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc));
return;
}
info.si_signo = SIGBUS;
@ -2176,6 +2250,26 @@ void mem_address_unaligned(struct pt_regs *regs, unsigned long sfar, unsigned lo
force_sig_info(SIGBUS, &info, current);
}
void sun4v_mna(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
{
siginfo_t info;
if (notify_die(DIE_TRAP, "memory address unaligned", regs,
0, 0x34, SIGSEGV) == NOTIFY_STOP)
return;
if (regs->tstate & TSTATE_PRIV) {
kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc));
return;
}
info.si_signo = SIGBUS;
info.si_errno = 0;
info.si_code = BUS_ADRALN;
info.si_addr = (void __user *) addr;
info.si_trapno = 0;
force_sig_info(SIGBUS, &info, current);
}
void do_privop(struct pt_regs *regs)
{
siginfo_t info;

45
arch/sparc64/kernel/unaligned.c
View File

@ -277,7 +277,7 @@ static void kernel_mna_trap_fault(void)
regs->tstate |= (ASI_AIUS << 24UL);
}
asmlinkage void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn, unsigned long sfar, unsigned long sfsr)
asmlinkage void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn)
{
enum direction dir = decode_direction(insn);
int size = decode_access_size(insn);
@ -405,6 +405,9 @@ extern void do_privact(struct pt_regs *regs);
extern void spitfire_data_access_exception(struct pt_regs *regs,
unsigned long sfsr,
unsigned long sfar);
extern void sun4v_data_access_exception(struct pt_regs *regs,
unsigned long addr,
unsigned long type_ctx);
int handle_ldf_stq(u32 insn, struct pt_regs *regs)
{
@ -447,14 +450,20 @@ int handle_ldf_stq(u32 insn, struct pt_regs *regs)
break;
}
default:
spitfire_data_access_exception(regs, 0, addr);
if (tlb_type == hypervisor)
sun4v_data_access_exception(regs, addr, 0);
else
spitfire_data_access_exception(regs, 0, addr);
return 1;
}
if (put_user (first >> 32, (u32 __user *)addr) ||
__put_user ((u32)first, (u32 __user *)(addr + 4)) ||
__put_user (second >> 32, (u32 __user *)(addr + 8)) ||
__put_user ((u32)second, (u32 __user *)(addr + 12))) {
spitfire_data_access_exception(regs, 0, addr);
if (tlb_type == hypervisor)
sun4v_data_access_exception(regs, addr, 0);
else
spitfire_data_access_exception(regs, 0, addr);
return 1;
}
} else {
@ -467,7 +476,10 @@ int handle_ldf_stq(u32 insn, struct pt_regs *regs)
do_privact(regs);
return 1;
} else if (asi > ASI_SNFL) {
spitfire_data_access_exception(regs, 0, addr);
if (tlb_type == hypervisor)
sun4v_data_access_exception(regs, addr, 0);
else
spitfire_data_access_exception(regs, 0, addr);
return 1;
}
switch (insn & 0x180000) {
@ -484,7 +496,10 @@ int handle_ldf_stq(u32 insn, struct pt_regs *regs)
err |= __get_user (data[i], (u32 __user *)(addr + 4*i));
}
if (err && !(asi & 0x2 /* NF */)) {
spitfire_data_access_exception(regs, 0, addr);
if (tlb_type == hypervisor)
sun4v_data_access_exception(regs, addr, 0);
else
spitfire_data_access_exception(regs, 0, addr);
return 1;
}
if (asi & 0x8) /* Little */ {
@ -548,7 +563,7 @@ void handle_lddfmna(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr
u32 insn;
u32 first, second;
u64 value;
u8 asi, freg;
u8 freg;
int flag;
struct fpustate *f = FPUSTATE;
@ -557,7 +572,7 @@ void handle_lddfmna(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr
if (test_thread_flag(TIF_32BIT))
pc = (u32)pc;
if (get_user(insn, (u32 __user *) pc) != -EFAULT) {
asi = sfsr >> 16;
int asi = decode_asi(insn, regs);
if ((asi > ASI_SNFL) ||
(asi < ASI_P))
goto daex;
@ -587,7 +602,11 @@ void handle_lddfmna(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr
*(u64 *)(f->regs + freg) = value;
current_thread_info()->fpsaved[0] |= flag;
} else {
daex: spitfire_data_access_exception(regs, sfsr, sfar);
daex:
if (tlb_type == hypervisor)
sun4v_data_access_exception(regs, sfar, sfsr);
else
spitfire_data_access_exception(regs, sfsr, sfar);
return;
}
advance(regs);
@ -600,7 +619,7 @@ void handle_stdfmna(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr
unsigned long tstate = regs->tstate;
u32 insn;
u64 value;
u8 asi, freg;
u8 freg;
int flag;
struct fpustate *f = FPUSTATE;
@ -609,8 +628,8 @@ void handle_stdfmna(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr
if (test_thread_flag(TIF_32BIT))
pc = (u32)pc;
if (get_user(insn, (u32 __user *) pc) != -EFAULT) {
int asi = decode_asi(insn, regs);
freg = ((insn >> 25) & 0x1e) | ((insn >> 20) & 0x20);
asi = sfsr >> 16;
value = 0;
flag = (freg < 32) ? FPRS_DL : FPRS_DU;
if ((asi > ASI_SNFL) ||
@ -631,7 +650,11 @@ void handle_stdfmna(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr
__put_user ((u32)value, (u32 __user *)(sfar + 4)))
goto daex;
} else {
daex: spitfire_data_access_exception(regs, sfsr, sfar);
daex:
if (tlb_type == hypervisor)
sun4v_data_access_exception(regs, sfar, sfsr);
else
spitfire_data_access_exception(regs, sfsr, sfar);
return;
}
advance(regs);

26
arch/sparc64/kernel/winfixup.S
View File

@ -109,16 +109,23 @@ winfix_mna:
done
fill_fixup_mna:
TRAP_LOAD_THREAD_REG(%g6, %g1)
rdpr %tstate, %g1
and %g1, TSTATE_CWP, %g1
wrpr %g1, %cwp
ba,pt %xcc, etrap
rd %pc, %g7
mov %l4, %o2
mov %l5, %o1
call mem_address_unaligned
sethi %hi(tlb_type), %g1
mov %l4, %o1
lduw [%g1 + %lo(tlb_type)], %g1
mov %l5, %o2
cmp %g1, 3
bne,pt %icc, 1f
add %sp, PTREGS_OFF, %o0
call sun4v_mna
nop
ba,a,pt %xcc, rtrap_clr_l6
1: call mem_address_unaligned
nop
ba,a,pt %xcc, rtrap_clr_l6
winfix_dax:
@ -128,14 +135,21 @@ winfix_dax:
done
fill_fixup_dax:
TRAP_LOAD_THREAD_REG(%g6, %g1)
rdpr %tstate, %g1
and %g1, TSTATE_CWP, %g1
wrpr %g1, %cwp
ba,pt %xcc, etrap
rd %pc, %g7
sethi %hi(tlb_type), %g1
mov %l4, %o1
lduw [%g1 + %lo(tlb_type)], %g1
mov %l5, %o2
call spitfire_data_access_exception
cmp %g1, 3
bne,pt %icc, 1f
add %sp, PTREGS_OFF, %o0
call sun4v_data_access_exception
nop
ba,a,pt %xcc, rtrap_clr_l6
1: call spitfire_data_access_exception
nop
ba,a,pt %xcc, rtrap_clr_l6