| Message ID | 20191126052141.28009-7-jniethe5@gmail.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Initial Prefixed Instruction support | expand |
| Context | Check | Description |
|---|---|---|
| snowpatch_ozlabs/apply_patch | success | Successfully applied on branch powerpc/merge (2ec2260ce7bce5eb6a8ced0bb78d75c1b3eca306) |
| snowpatch_ozlabs/checkpatch | warning | total: 0 errors, 0 warnings, 2 checks, 128 lines checked |
| snowpatch_ozlabs/needsstable | success | Patch has no Fixes tags |
On Tue, Nov 26, 2019 at 04:21:29PM +1100, Jordan Niethe wrote: > This adds emulation support for the following prefixed integer > load/stores: > * Prefixed Load Byte and Zero (plbz) > * Prefixed Load Halfword and Zero (plhz) > * Prefixed Load Halfword Algebraic (plha) > * Prefixed Load Word and Zero (plwz) > * Prefixed Load Word Algebraic (plwa) > * Prefixed Load Doubleword (pld) > * Prefixed Store Byte (pstb) > * Prefixed Store Halfword (psth) > * Prefixed Store Word (pstw) > * Prefixed Store Doubleword (pstd) > * Prefixed Load Quadword (plq) > * Prefixed Store Quadword (pstq) > > Signed-off-by: Jordan Niethe <jniethe5@gmail.com> > --- > arch/powerpc/lib/sstep.c | 110 +++++++++++++++++++++++++++++++++++++++ > 1 file changed, 110 insertions(+) > > diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c > index ade3f5eba2e5..4f5ad1f602d8 100644 > --- a/arch/powerpc/lib/sstep.c > +++ b/arch/powerpc/lib/sstep.c > @@ -187,6 +187,43 @@ static nokprobe_inline unsigned long xform_ea(unsigned int instr, > return ea; > } > > +/* > + * Calculate effective address for a MLS:D-form / 8LS:D-form prefixed instruction > + */ > +static nokprobe_inline unsigned long mlsd_8lsd_ea(unsigned int instr, > + unsigned int sufx, > + const struct pt_regs *regs) > +{ > + int ra, prefix_r; > + unsigned int dd; > + unsigned long ea, d0, d1, d; > + > + prefix_r = instr & (1ul << 20); > + ra = (sufx >> 16) & 0x1f; > + > + d0 = instr & 0x3ffff; > + d1 = sufx & 0xffff; > + d = (d0 << 16) | d1; > + > + /* > + * sign extend a 34 bit number > + */ > + dd = (unsigned int) (d >> 2); > + ea = (signed int) dd; > + ea = (ea << 2) | (d & 0x3); > + > + if (!prefix_r && ra) > + ea += regs->gpr[ra]; > + else if (!prefix_r && !ra) > + ; /* Leave ea as is */ > + else if (prefix_r && !ra) > + ea += regs->nip; > + else if (prefix_r && ra) > + ; /* Invalid form. Should already be checked for by caller! */ > + > + return ea; > +} > + > /* > * Return the largest power of 2, not greater than sizeof(unsigned long), > * such that x is a multiple of it. > @@ -1166,6 +1203,7 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs, > unsigned int instr, unsigned int sufx) > { > unsigned int opcode, ra, rb, rc, rd, spr, u; > + unsigned int sufxopcode, prefixtype, prefix_r; > unsigned long int imm; > unsigned long int val, val2; > unsigned int mb, me, sh; > @@ -2652,6 +2690,78 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs, > > } > > +/* > + * Prefixed instructions > + */ > + switch (opcode) { > + case 1: > + prefix_r = instr & (1ul << 20); > + ra = (sufx >> 16) & 0x1f; > + op->update_reg = ra; > + rd = (sufx >> 21) & 0x1f; > + op->reg = rd; > + op->val = regs->gpr[rd]; > + > + sufxopcode = sufx >> 26; > + prefixtype = (instr >> 24) & 0x3; > + switch (prefixtype) { > + case 0: /* Type 00 Eight-Byte Load/Store */ > + if (prefix_r && ra) > + break; > + op->ea = mlsd_8lsd_ea(instr, sufx, regs); > + switch (sufxopcode) { > + case 41: /* plwa */ > + op->type = MKOP(LOAD, PREFIXED | SIGNEXT, 4); > + break; > + case 56: /* plq */ > + op->type = MKOP(LOAD, PREFIXED, 16); > + break; > + case 57: /* pld */ > + op->type = MKOP(LOAD, PREFIXED | SIGNEXT, 8); > + break; > + case 60: /* stq */ > + op->type = MKOP(STORE, PREFIXED, 16); > + break; > + case 61: /* pstd */ > + op->type = MKOP(STORE, PREFIXED | SIGNEXT, 8); For 8 byte and and 1 byte (mentioned below for Type 10 instructions), we do not have their respective definitions in `do_signext()`, I am not sure whether it is typo/miss. > + break; > + } > + break; > + case 1: /* Type 01 Modified Register-to-Register */ Type 01 would be Eight-Byte Register-to-Register. -- Bala > + break; > + case 2: /* Type 10 Modified Load/Store */ > + if (prefix_r && ra) > + break; > + op->ea = mlsd_8lsd_ea(instr, sufx, regs); > + switch (sufxopcode) { > + case 32: /* plwz */ > + op->type = MKOP(LOAD, PREFIXED, 4); > + break; > + case 34: /* plbz */ > + op->type = MKOP(LOAD, PREFIXED, 1); > + break; > + case 36: /* pstw */ > + op->type = MKOP(STORE, PREFIXED, 4); > + break; > + case 38: /* pstb */ > + op->type = MKOP(STORE, PREFIXED, 1); > + break; > + case 40: /* plhz */ > + op->type = MKOP(LOAD, PREFIXED, 2); > + break; > + case 42: /* plha */ > + op->type = MKOP(LOAD, PREFIXED | SIGNEXT, 2); > + break; > + case 44: /* psth */ > + op->type = MKOP(STORE, PREFIXED, 2); > + break; > + } > + break; > + case 3: /* Type 11 Modified Register-to-Register */ > + break; > + } > + } > + > #ifdef CONFIG_VSX > if ((GETTYPE(op->type) == LOAD_VSX || > GETTYPE(op->type) == STORE_VSX) && > -- > 2.20.1 >
On Tue, Nov 26, 2019 at 04:21:29PM +1100, Jordan Niethe wrote: > This adds emulation support for the following prefixed integer > load/stores: > * Prefixed Load Byte and Zero (plbz) > * Prefixed Load Halfword and Zero (plhz) > * Prefixed Load Halfword Algebraic (plha) > * Prefixed Load Word and Zero (plwz) > * Prefixed Load Word Algebraic (plwa) > * Prefixed Load Doubleword (pld) > * Prefixed Store Byte (pstb) > * Prefixed Store Halfword (psth) > * Prefixed Store Word (pstw) > * Prefixed Store Doubleword (pstd) > * Prefixed Load Quadword (plq) > * Prefixed Store Quadword (pstq) > > Signed-off-by: Jordan Niethe <jniethe5@gmail.com> > --- > arch/powerpc/lib/sstep.c | 110 +++++++++++++++++++++++++++++++++++++++ > 1 file changed, 110 insertions(+) > > diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c > index ade3f5eba2e5..4f5ad1f602d8 100644 > --- a/arch/powerpc/lib/sstep.c > +++ b/arch/powerpc/lib/sstep.c > @@ -187,6 +187,43 @@ static nokprobe_inline unsigned long xform_ea(unsigned int instr, > return ea; > } > > +/* > + * Calculate effective address for a MLS:D-form / 8LS:D-form prefixed instruction > + */ > +static nokprobe_inline unsigned long mlsd_8lsd_ea(unsigned int instr, > + unsigned int sufx, > + const struct pt_regs *regs) > +{ > + int ra, prefix_r; > + unsigned int dd; > + unsigned long ea, d0, d1, d; > + > + prefix_r = instr & (1ul << 20); > + ra = (sufx >> 16) & 0x1f; > + > + d0 = instr & 0x3ffff; > + d1 = sufx & 0xffff; > + d = (d0 << 16) | d1; > + > + /* > + * sign extend a 34 bit number > + */ > + dd = (unsigned int) (d >> 2); > + ea = (signed int) dd; > + ea = (ea << 2) | (d & 0x3); > + > + if (!prefix_r && ra) > + ea += regs->gpr[ra]; > + else if (!prefix_r && !ra) > + ; /* Leave ea as is */ > + else if (prefix_r && !ra) > + ea += regs->nip; > + else if (prefix_r && ra) > + ; /* Invalid form. Should already be checked for by caller! */ > + > + return ea; > +} > + > /* > * Return the largest power of 2, not greater than sizeof(unsigned long), > * such that x is a multiple of it. > @@ -1166,6 +1203,7 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs, > unsigned int instr, unsigned int sufx) > { > unsigned int opcode, ra, rb, rc, rd, spr, u; > + unsigned int sufxopcode, prefixtype, prefix_r; > unsigned long int imm; > unsigned long int val, val2; > unsigned int mb, me, sh; > @@ -2652,6 +2690,78 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs, > > } > > +/* > + * Prefixed instructions > + */ > + switch (opcode) { > + case 1: > + prefix_r = instr & (1ul << 20); > + ra = (sufx >> 16) & 0x1f; > + op->update_reg = ra; > + rd = (sufx >> 21) & 0x1f; > + op->reg = rd; > + op->val = regs->gpr[rd]; > + > + sufxopcode = sufx >> 26; > + prefixtype = (instr >> 24) & 0x3; > + switch (prefixtype) { > + case 0: /* Type 00 Eight-Byte Load/Store */ > + if (prefix_r && ra) > + break; > + op->ea = mlsd_8lsd_ea(instr, sufx, regs); > + switch (sufxopcode) { > + case 41: /* plwa */ > + op->type = MKOP(LOAD, PREFIXED | SIGNEXT, 4); > + break; > + case 56: /* plq */ > + op->type = MKOP(LOAD, PREFIXED, 16); > + break; > + case 57: /* pld */ > + op->type = MKOP(LOAD, PREFIXED | SIGNEXT, 8); > + break; > + case 60: /* stq */ > + op->type = MKOP(STORE, PREFIXED, 16); > + break; > + case 61: /* pstd */ > + op->type = MKOP(STORE, PREFIXED | SIGNEXT, 8); sorry, we don't do SIGNEXT for 1 byte below in Type 10, so does 8 byte is used conscious without definition in `do_signext()` as we don't really need to do anything ? -- Bala > + break; > + } > + break; > + case 1: /* Type 01 Modified Register-to-Register */ > + break; > + case 2: /* Type 10 Modified Load/Store */ > + if (prefix_r && ra) > + break; > + op->ea = mlsd_8lsd_ea(instr, sufx, regs); > + switch (sufxopcode) { > + case 32: /* plwz */ > + op->type = MKOP(LOAD, PREFIXED, 4); > + break; > + case 34: /* plbz */ > + op->type = MKOP(LOAD, PREFIXED, 1); > + break; > + case 36: /* pstw */ > + op->type = MKOP(STORE, PREFIXED, 4); > + break; > + case 38: /* pstb */ > + op->type = MKOP(STORE, PREFIXED, 1); > + break; > + case 40: /* plhz */ > + op->type = MKOP(LOAD, PREFIXED, 2); > + break; > + case 42: /* plha */ > + op->type = MKOP(LOAD, PREFIXED | SIGNEXT, 2); > + break; > + case 44: /* psth */ > + op->type = MKOP(STORE, PREFIXED, 2); > + break; > + } > + break; > + case 3: /* Type 11 Modified Register-to-Register */ > + break; > + } > + } > + > #ifdef CONFIG_VSX > if ((GETTYPE(op->type) == LOAD_VSX || > GETTYPE(op->type) == STORE_VSX) && > -- > 2.20.1 >
On Fri, Jan 10, 2020 at 9:38 PM Balamuruhan S <bala24@linux.ibm.com> wrote: > > On Tue, Nov 26, 2019 at 04:21:29PM +1100, Jordan Niethe wrote: > > This adds emulation support for the following prefixed integer > > load/stores: > > * Prefixed Load Byte and Zero (plbz) > > * Prefixed Load Halfword and Zero (plhz) > > * Prefixed Load Halfword Algebraic (plha) > > * Prefixed Load Word and Zero (plwz) > > * Prefixed Load Word Algebraic (plwa) > > * Prefixed Load Doubleword (pld) > > * Prefixed Store Byte (pstb) > > * Prefixed Store Halfword (psth) > > * Prefixed Store Word (pstw) > > * Prefixed Store Doubleword (pstd) > > * Prefixed Load Quadword (plq) > > * Prefixed Store Quadword (pstq) > > > > Signed-off-by: Jordan Niethe <jniethe5@gmail.com> > > --- > > arch/powerpc/lib/sstep.c | 110 +++++++++++++++++++++++++++++++++++++++ > > 1 file changed, 110 insertions(+) > > > > diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c > > index ade3f5eba2e5..4f5ad1f602d8 100644 > > --- a/arch/powerpc/lib/sstep.c > > +++ b/arch/powerpc/lib/sstep.c > > @@ -187,6 +187,43 @@ static nokprobe_inline unsigned long xform_ea(unsigned int instr, > > return ea; > > } > > > > +/* > > + * Calculate effective address for a MLS:D-form / 8LS:D-form prefixed instruction > > + */ > > +static nokprobe_inline unsigned long mlsd_8lsd_ea(unsigned int instr, > > + unsigned int sufx, > > + const struct pt_regs *regs) > > +{ > > + int ra, prefix_r; > > + unsigned int dd; > > + unsigned long ea, d0, d1, d; > > + > > + prefix_r = instr & (1ul << 20); > > + ra = (sufx >> 16) & 0x1f; > > + > > + d0 = instr & 0x3ffff; > > + d1 = sufx & 0xffff; > > + d = (d0 << 16) | d1; > > + > > + /* > > + * sign extend a 34 bit number > > + */ > > + dd = (unsigned int) (d >> 2); > > + ea = (signed int) dd; > > + ea = (ea << 2) | (d & 0x3); > > + > > + if (!prefix_r && ra) > > + ea += regs->gpr[ra]; > > + else if (!prefix_r && !ra) > > + ; /* Leave ea as is */ > > + else if (prefix_r && !ra) > > + ea += regs->nip; > > + else if (prefix_r && ra) > > + ; /* Invalid form. Should already be checked for by caller! */ > > + > > + return ea; > > +} > > + > > /* > > * Return the largest power of 2, not greater than sizeof(unsigned long), > > * such that x is a multiple of it. > > @@ -1166,6 +1203,7 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs, > > unsigned int instr, unsigned int sufx) > > { > > unsigned int opcode, ra, rb, rc, rd, spr, u; > > + unsigned int sufxopcode, prefixtype, prefix_r; > > unsigned long int imm; > > unsigned long int val, val2; > > unsigned int mb, me, sh; > > @@ -2652,6 +2690,78 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs, > > > > } > > > > +/* > > + * Prefixed instructions > > + */ > > + switch (opcode) { > > + case 1: > > + prefix_r = instr & (1ul << 20); > > + ra = (sufx >> 16) & 0x1f; > > + op->update_reg = ra; > > + rd = (sufx >> 21) & 0x1f; > > + op->reg = rd; > > + op->val = regs->gpr[rd]; > > + > > + sufxopcode = sufx >> 26; > > + prefixtype = (instr >> 24) & 0x3; > > + switch (prefixtype) { > > + case 0: /* Type 00 Eight-Byte Load/Store */ > > + if (prefix_r && ra) > > + break; > > + op->ea = mlsd_8lsd_ea(instr, sufx, regs); > > + switch (sufxopcode) { > > + case 41: /* plwa */ > > + op->type = MKOP(LOAD, PREFIXED | SIGNEXT, 4); > > + break; > > + case 56: /* plq */ > > + op->type = MKOP(LOAD, PREFIXED, 16); > > + break; > > + case 57: /* pld */ > > + op->type = MKOP(LOAD, PREFIXED | SIGNEXT, 8); > > + break; > > + case 60: /* stq */ > > + op->type = MKOP(STORE, PREFIXED, 16); > > + break; > > + case 61: /* pstd */ > > + op->type = MKOP(STORE, PREFIXED | SIGNEXT, 8); > > For 8 byte and and 1 byte (mentioned below for Type 10 instructions), we > do not have their respective definitions in `do_signext()`, I am not > sure whether it is typo/miss. This was a mistake. pstd/pld should not have been flagged with SIGNEXT. There still are only algebraic loads for word and halfword lengths so do_signext() is fine. > > > + break; > > + } > > + break; > > + case 1: /* Type 01 Modified Register-to-Register */ > > Type 01 would be Eight-Byte Register-to-Register. Thanks, you are right. > > -- Bala > > + break; > > + case 2: /* Type 10 Modified Load/Store */ > > + if (prefix_r && ra) > > + break; > > + op->ea = mlsd_8lsd_ea(instr, sufx, regs); > > + switch (sufxopcode) { > > + case 32: /* plwz */ > > + op->type = MKOP(LOAD, PREFIXED, 4); > > + break; > > + case 34: /* plbz */ > > + op->type = MKOP(LOAD, PREFIXED, 1); > > + break; > > + case 36: /* pstw */ > > + op->type = MKOP(STORE, PREFIXED, 4); > > + break; > > + case 38: /* pstb */ > > + op->type = MKOP(STORE, PREFIXED, 1); > > + break; > > + case 40: /* plhz */ > > + op->type = MKOP(LOAD, PREFIXED, 2); > > + break; > > + case 42: /* plha */ > > + op->type = MKOP(LOAD, PREFIXED | SIGNEXT, 2); > > + break; > > + case 44: /* psth */ > > + op->type = MKOP(STORE, PREFIXED, 2); > > + break; > > + } > > + break; > > + case 3: /* Type 11 Modified Register-to-Register */ > > + break; > > + } > > + } > > + > > #ifdef CONFIG_VSX > > if ((GETTYPE(op->type) == LOAD_VSX || > > GETTYPE(op->type) == STORE_VSX) && > > -- > > 2.20.1 > > >
On Sat, Jan 11, 2020 at 2:13 AM Balamuruhan S <bala24@linux.ibm.com> wrote: > > On Tue, Nov 26, 2019 at 04:21:29PM +1100, Jordan Niethe wrote: > > This adds emulation support for the following prefixed integer > > load/stores: > > * Prefixed Load Byte and Zero (plbz) > > * Prefixed Load Halfword and Zero (plhz) > > * Prefixed Load Halfword Algebraic (plha) > > * Prefixed Load Word and Zero (plwz) > > * Prefixed Load Word Algebraic (plwa) > > * Prefixed Load Doubleword (pld) > > * Prefixed Store Byte (pstb) > > * Prefixed Store Halfword (psth) > > * Prefixed Store Word (pstw) > > * Prefixed Store Doubleword (pstd) > > * Prefixed Load Quadword (plq) > > * Prefixed Store Quadword (pstq) > > > > Signed-off-by: Jordan Niethe <jniethe5@gmail.com> > > --- > > arch/powerpc/lib/sstep.c | 110 +++++++++++++++++++++++++++++++++++++++ > > 1 file changed, 110 insertions(+) > > > > diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c > > index ade3f5eba2e5..4f5ad1f602d8 100644 > > --- a/arch/powerpc/lib/sstep.c > > +++ b/arch/powerpc/lib/sstep.c > > @@ -187,6 +187,43 @@ static nokprobe_inline unsigned long xform_ea(unsigned int instr, > > return ea; > > } > > > > +/* > > + * Calculate effective address for a MLS:D-form / 8LS:D-form prefixed instruction > > + */ > > +static nokprobe_inline unsigned long mlsd_8lsd_ea(unsigned int instr, > > + unsigned int sufx, > > + const struct pt_regs *regs) > > +{ > > + int ra, prefix_r; > > + unsigned int dd; > > + unsigned long ea, d0, d1, d; > > + > > + prefix_r = instr & (1ul << 20); > > + ra = (sufx >> 16) & 0x1f; > > + > > + d0 = instr & 0x3ffff; > > + d1 = sufx & 0xffff; > > + d = (d0 << 16) | d1; > > + > > + /* > > + * sign extend a 34 bit number > > + */ > > + dd = (unsigned int) (d >> 2); > > + ea = (signed int) dd; > > + ea = (ea << 2) | (d & 0x3); > > + > > + if (!prefix_r && ra) > > + ea += regs->gpr[ra]; > > + else if (!prefix_r && !ra) > > + ; /* Leave ea as is */ > > + else if (prefix_r && !ra) > > + ea += regs->nip; > > + else if (prefix_r && ra) > > + ; /* Invalid form. Should already be checked for by caller! */ > > + > > + return ea; > > +} > > + > > /* > > * Return the largest power of 2, not greater than sizeof(unsigned long), > > * such that x is a multiple of it. > > @@ -1166,6 +1203,7 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs, > > unsigned int instr, unsigned int sufx) > > { > > unsigned int opcode, ra, rb, rc, rd, spr, u; > > + unsigned int sufxopcode, prefixtype, prefix_r; > > unsigned long int imm; > > unsigned long int val, val2; > > unsigned int mb, me, sh; > > @@ -2652,6 +2690,78 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs, > > > > } > > > > +/* > > + * Prefixed instructions > > + */ > > + switch (opcode) { > > + case 1: > > + prefix_r = instr & (1ul << 20); > > + ra = (sufx >> 16) & 0x1f; > > + op->update_reg = ra; > > + rd = (sufx >> 21) & 0x1f; > > + op->reg = rd; > > + op->val = regs->gpr[rd]; > > + > > + sufxopcode = sufx >> 26; > > + prefixtype = (instr >> 24) & 0x3; > > + switch (prefixtype) { > > + case 0: /* Type 00 Eight-Byte Load/Store */ > > + if (prefix_r && ra) > > + break; > > + op->ea = mlsd_8lsd_ea(instr, sufx, regs); > > + switch (sufxopcode) { > > + case 41: /* plwa */ > > + op->type = MKOP(LOAD, PREFIXED | SIGNEXT, 4); > > + break; > > + case 56: /* plq */ > > + op->type = MKOP(LOAD, PREFIXED, 16); > > + break; > > + case 57: /* pld */ > > + op->type = MKOP(LOAD, PREFIXED | SIGNEXT, 8); > > + break; > > + case 60: /* stq */ > > + op->type = MKOP(STORE, PREFIXED, 16); > > + break; > > + case 61: /* pstd */ > > + op->type = MKOP(STORE, PREFIXED | SIGNEXT, 8); > > sorry, we don't do SIGNEXT for 1 byte below in Type 10, so does 8 byte is used > conscious without definition in `do_signext()` as we don't really need to do > anything ? No, it was mistake. Those instructions should not have been marked as SIGNEXT. > > -- Bala > > > + break; > > + } > > + break; > > + case 1: /* Type 01 Modified Register-to-Register */ > > + break; > > + case 2: /* Type 10 Modified Load/Store */ > > + if (prefix_r && ra) > > + break; > > + op->ea = mlsd_8lsd_ea(instr, sufx, regs); > > + switch (sufxopcode) { > > + case 32: /* plwz */ > > + op->type = MKOP(LOAD, PREFIXED, 4); > > + break; > > + case 34: /* plbz */ > > + op->type = MKOP(LOAD, PREFIXED, 1); > > + break; > > + case 36: /* pstw */ > > + op->type = MKOP(STORE, PREFIXED, 4); > > + break; > > + case 38: /* pstb */ > > + op->type = MKOP(STORE, PREFIXED, 1); > > + break; > > + case 40: /* plhz */ > > + op->type = MKOP(LOAD, PREFIXED, 2); > > + break; > > + case 42: /* plha */ > > + op->type = MKOP(LOAD, PREFIXED | SIGNEXT, 2); > > + break; > > + case 44: /* psth */ > > + op->type = MKOP(STORE, PREFIXED, 2); > > + break; > > + } > > + break; > > + case 3: /* Type 11 Modified Register-to-Register */ > > + break; > > + } > > + } > > + > > #ifdef CONFIG_VSX > > if ((GETTYPE(op->type) == LOAD_VSX || > > GETTYPE(op->type) == STORE_VSX) && > > -- > > 2.20.1 > > >
diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c index ade3f5eba2e5..4f5ad1f602d8 100644 --- a/arch/powerpc/lib/sstep.c +++ b/arch/powerpc/lib/sstep.c @@ -187,6 +187,43 @@ static nokprobe_inline unsigned long xform_ea(unsigned int instr, return ea; } +/* + * Calculate effective address for a MLS:D-form / 8LS:D-form prefixed instruction + */ +static nokprobe_inline unsigned long mlsd_8lsd_ea(unsigned int instr, + unsigned int sufx, + const struct pt_regs *regs) +{ + int ra, prefix_r; + unsigned int dd; + unsigned long ea, d0, d1, d; + + prefix_r = instr & (1ul << 20); + ra = (sufx >> 16) & 0x1f; + + d0 = instr & 0x3ffff; + d1 = sufx & 0xffff; + d = (d0 << 16) | d1; + + /* + * sign extend a 34 bit number + */ + dd = (unsigned int) (d >> 2); + ea = (signed int) dd; + ea = (ea << 2) | (d & 0x3); + + if (!prefix_r && ra) + ea += regs->gpr[ra]; + else if (!prefix_r && !ra) + ; /* Leave ea as is */ + else if (prefix_r && !ra) + ea += regs->nip; + else if (prefix_r && ra) + ; /* Invalid form. Should already be checked for by caller! */ + + return ea; +} + /* * Return the largest power of 2, not greater than sizeof(unsigned long), * such that x is a multiple of it. @@ -1166,6 +1203,7 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs, unsigned int instr, unsigned int sufx) { unsigned int opcode, ra, rb, rc, rd, spr, u; + unsigned int sufxopcode, prefixtype, prefix_r; unsigned long int imm; unsigned long int val, val2; unsigned int mb, me, sh; @@ -2652,6 +2690,78 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs, } +/* + * Prefixed instructions + */ + switch (opcode) { + case 1: + prefix_r = instr & (1ul << 20); + ra = (sufx >> 16) & 0x1f; + op->update_reg = ra; + rd = (sufx >> 21) & 0x1f; + op->reg = rd; + op->val = regs->gpr[rd]; + + sufxopcode = sufx >> 26; + prefixtype = (instr >> 24) & 0x3; + switch (prefixtype) { + case 0: /* Type 00 Eight-Byte Load/Store */ + if (prefix_r && ra) + break; + op->ea = mlsd_8lsd_ea(instr, sufx, regs); + switch (sufxopcode) { + case 41: /* plwa */ + op->type = MKOP(LOAD, PREFIXED | SIGNEXT, 4); + break; + case 56: /* plq */ + op->type = MKOP(LOAD, PREFIXED, 16); + break; + case 57: /* pld */ + op->type = MKOP(LOAD, PREFIXED | SIGNEXT, 8); + break; + case 60: /* stq */ + op->type = MKOP(STORE, PREFIXED, 16); + break; + case 61: /* pstd */ + op->type = MKOP(STORE, PREFIXED | SIGNEXT, 8); + break; + } + break; + case 1: /* Type 01 Modified Register-to-Register */ + break; + case 2: /* Type 10 Modified Load/Store */ + if (prefix_r && ra) + break; + op->ea = mlsd_8lsd_ea(instr, sufx, regs); + switch (sufxopcode) { + case 32: /* plwz */ + op->type = MKOP(LOAD, PREFIXED, 4); + break; + case 34: /* plbz */ + op->type = MKOP(LOAD, PREFIXED, 1); + break; + case 36: /* pstw */ + op->type = MKOP(STORE, PREFIXED, 4); + break; + case 38: /* pstb */ + op->type = MKOP(STORE, PREFIXED, 1); + break; + case 40: /* plhz */ + op->type = MKOP(LOAD, PREFIXED, 2); + break; + case 42: /* plha */ + op->type = MKOP(LOAD, PREFIXED | SIGNEXT, 2); + break; + case 44: /* psth */ + op->type = MKOP(STORE, PREFIXED, 2); + break; + } + break; + case 3: /* Type 11 Modified Register-to-Register */ + break; + } + } + #ifdef CONFIG_VSX if ((GETTYPE(op->type) == LOAD_VSX || GETTYPE(op->type) == STORE_VSX) &&
This adds emulation support for the following prefixed integer load/stores: * Prefixed Load Byte and Zero (plbz) * Prefixed Load Halfword and Zero (plhz) * Prefixed Load Halfword Algebraic (plha) * Prefixed Load Word and Zero (plwz) * Prefixed Load Word Algebraic (plwa) * Prefixed Load Doubleword (pld) * Prefixed Store Byte (pstb) * Prefixed Store Halfword (psth) * Prefixed Store Word (pstw) * Prefixed Store Doubleword (pstd) * Prefixed Load Quadword (plq) * Prefixed Store Quadword (pstq) Signed-off-by: Jordan Niethe <jniethe5@gmail.com> --- arch/powerpc/lib/sstep.c | 110 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 110 insertions(+)