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Re: [Qemu-devel] [PATCH v3] s390x/tcg: add various alignment checks
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From: |
David Hildenbrand |
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Subject: |
Re: [Qemu-devel] [PATCH v3] s390x/tcg: add various alignment checks |
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Date: |
Thu, 15 Feb 2018 11:50:05 +0100 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.5.2 |
On 15.02.2018 11:38, David Hildenbrand wrote:
> Let's add proper alignment checks for a handful of instructions that
> require a SPECIFICATION exception in case alignment is violated.
>
> Introduce new wout/in functions. As we are right now only using them for
> privileged instructions, we have to add ugly ifdefs to silence
> compilers.
>
> Convert STORE CPU ID right away to make use of the wout function.
>
> Signed-off-by: David Hildenbrand <address@hidden>
> ---
> target/s390x/insn-data.def | 16 ++++++++--------
> target/s390x/mem_helper.c | 25 +++++++++++++++++++++++++
> target/s390x/translate.c | 43 ++++++++++++++++++++++++++++++++++++++++++-
> 3 files changed, 75 insertions(+), 9 deletions(-)
>
> diff --git a/target/s390x/insn-data.def b/target/s390x/insn-data.def
> index 621e10d615..157619403d 100644
> --- a/target/s390x/insn-data.def
> +++ b/target/s390x/insn-data.def
> @@ -1000,13 +1000,13 @@
> /* ??? Not implemented - is it necessary? */
> C(0xb204, SCK, S, Z, 0, 0, 0, 0, 0, 0)
> /* SET CLOCK COMPARATOR */
> - C(0xb206, SCKC, S, Z, 0, m2_64, 0, 0, sckc, 0)
> + C(0xb206, SCKC, S, Z, 0, m2_64a, 0, 0, sckc, 0)
> /* SET CLOCK PROGRAMMABLE FIELD */
> C(0x0107, SCKPF, E, Z, 0, 0, 0, 0, sckpf, 0)
> /* SET CPU TIMER */
> - C(0xb208, SPT, S, Z, 0, m2_64, 0, 0, spt, 0)
> + C(0xb208, SPT, S, Z, 0, m2_64a, 0, 0, spt, 0)
> /* SET PREFIX */
> - C(0xb210, SPX, S, Z, 0, m2_32u, 0, 0, spx, 0)
> + C(0xb210, SPX, S, Z, 0, m2_32ua, 0, 0, spx, 0)
> /* SET PSW KEY FROM ADDRESS */
> C(0xb20a, SPKA, S, Z, 0, a2, 0, 0, spka, 0)
> /* SET STORAGE KEY EXTENDED */
> @@ -1021,20 +1021,20 @@
> /* STORE CLOCK EXTENDED */
> C(0xb278, STCKE, S, Z, 0, a2, 0, 0, stcke, 0)
> /* STORE CLOCK COMPARATOR */
> - C(0xb207, STCKC, S, Z, la2, 0, new, m1_64, stckc, 0)
> + C(0xb207, STCKC, S, Z, la2, 0, new, m1_64a, stckc, 0)
> /* STORE CONTROL */
> C(0xb600, STCTL, RS_a, Z, 0, a2, 0, 0, stctl, 0)
> C(0xeb25, STCTG, RSY_a, Z, 0, a2, 0, 0, stctg, 0)
> /* STORE CPU ADDRESS */
> - C(0xb212, STAP, S, Z, la2, 0, new, m1_16, stap, 0)
> + C(0xb212, STAP, S, Z, la2, 0, new, m1_16a, stap, 0)
> /* STORE CPU ID */
> - C(0xb202, STIDP, S, Z, la2, 0, new, 0, stidp, 0)
> + C(0xb202, STIDP, S, Z, la2, 0, new, m1_64a, stidp, 0)
> /* STORE CPU TIMER */
> - C(0xb209, STPT, S, Z, la2, 0, new, m1_64, stpt, 0)
> + C(0xb209, STPT, S, Z, la2, 0, new, m1_64a, stpt, 0)
> /* STORE FACILITY LIST */
> C(0xb2b1, STFL, S, Z, 0, 0, 0, 0, stfl, 0)
> /* STORE PREFIX */
> - C(0xb211, STPX, S, Z, la2, 0, new, m1_32, stpx, 0)
> + C(0xb211, STPX, S, Z, la2, 0, new, m1_32a, stpx, 0)
> /* STORE SYSTEM INFORMATION */
> C(0xb27d, STSI, S, Z, 0, a2, 0, 0, stsi, 0)
> /* STORE THEN AND SYSTEM MASK */
> diff --git a/target/s390x/mem_helper.c b/target/s390x/mem_helper.c
> index 427b795a78..d5291b246e 100644
> --- a/target/s390x/mem_helper.c
> +++ b/target/s390x/mem_helper.c
> @@ -693,6 +693,11 @@ void HELPER(lam)(CPUS390XState *env, uint32_t r1,
> uint64_t a2, uint32_t r3)
> uintptr_t ra = GETPC();
> int i;
>
> + if (a2 & 0x3) {
> + /* we either came here by lam or lamy, which have different lengths
> */
> + s390_program_interrupt(env, PGM_SPECIFICATION, ILEN_AUTO, ra);
> + }
> +
> for (i = r1;; i = (i + 1) % 16) {
> env->aregs[i] = cpu_ldl_data_ra(env, a2, ra);
> a2 += 4;
> @@ -709,6 +714,10 @@ void HELPER(stam)(CPUS390XState *env, uint32_t r1,
> uint64_t a2, uint32_t r3)
> uintptr_t ra = GETPC();
> int i;
>
> + if (a2 & 0x3) {
> + s390_program_interrupt(env, PGM_SPECIFICATION, 4, ra);
> + }
> +
> for (i = r1;; i = (i + 1) % 16) {
> cpu_stl_data_ra(env, a2, env->aregs[i], ra);
> a2 += 4;
> @@ -1620,6 +1629,10 @@ void HELPER(lctlg)(CPUS390XState *env, uint32_t r1,
> uint64_t a2, uint32_t r3)
> uint64_t src = a2;
> uint32_t i;
>
> + if (src & 0x7) {
> + s390_program_interrupt(env, PGM_SPECIFICATION, 6, ra);
> + }
> +
> for (i = r1;; i = (i + 1) % 16) {
> uint64_t val = cpu_ldq_data_ra(env, src, ra);
> if (env->cregs[i] != val && i >= 9 && i <= 11) {
> @@ -1650,6 +1663,10 @@ void HELPER(lctl)(CPUS390XState *env, uint32_t r1,
> uint64_t a2, uint32_t r3)
> uint64_t src = a2;
> uint32_t i;
>
> + if (src & 0x3) {
> + s390_program_interrupt(env, PGM_SPECIFICATION, 4, ra);
> + }
> +
> for (i = r1;; i = (i + 1) % 16) {
> uint32_t val = cpu_ldl_data_ra(env, src, ra);
> if ((uint32_t)env->cregs[i] != val && i >= 9 && i <= 11) {
> @@ -1677,6 +1694,10 @@ void HELPER(stctg)(CPUS390XState *env, uint32_t r1,
> uint64_t a2, uint32_t r3)
> uint64_t dest = a2;
> uint32_t i;
>
> + if (dest & 0x7) {
> + s390_program_interrupt(env, PGM_SPECIFICATION, 6, ra);
> + }
> +
> for (i = r1;; i = (i + 1) % 16) {
> cpu_stq_data_ra(env, dest, env->cregs[i], ra);
> dest += sizeof(uint64_t);
> @@ -1693,6 +1714,10 @@ void HELPER(stctl)(CPUS390XState *env, uint32_t r1,
> uint64_t a2, uint32_t r3)
> uint64_t dest = a2;
> uint32_t i;
>
> + if (dest & 0x3) {
> + s390_program_interrupt(env, PGM_SPECIFICATION, 4, ra);
> + }
> +
> for (i = r1;; i = (i + 1) % 16) {
> cpu_stl_data_ra(env, dest, env->cregs[i], ra);
> dest += sizeof(uint32_t);
> diff --git a/target/s390x/translate.c b/target/s390x/translate.c
> index 5aea3bbca6..7d39ab350d 100644
> --- a/target/s390x/translate.c
> +++ b/target/s390x/translate.c
> @@ -4062,7 +4062,6 @@ static ExitStatus op_stidp(DisasContext *s, DisasOps *o)
> {
> check_privileged(s);
> tcg_gen_ld_i64(o->out, cpu_env, offsetof(CPUS390XState, cpuid));
> - tcg_gen_qemu_st_i64(o->out, o->addr1, get_mem_index(s), MO_TEQ |
> MO_ALIGN);
> return NO_EXIT;
> }
>
> @@ -5220,18 +5219,42 @@ static void wout_m1_16(DisasContext *s, DisasFields
> *f, DisasOps *o)
> }
> #define SPEC_wout_m1_16 0
>
> +#ifndef CONFIG_USER_ONLY
> +static void wout_m1_16a(DisasContext *s, DisasFields *f, DisasOps *o)
> +{
> + tcg_gen_qemu_st_tl(o->out, o->addr1, get_mem_index(s), MO_TEUW |
> MO_ALIGN);
> +}
> +#define SPEC_wout_m1_16a 0
> +#endif
> +
> static void wout_m1_32(DisasContext *s, DisasFields *f, DisasOps *o)
> {
> tcg_gen_qemu_st32(o->out, o->addr1, get_mem_index(s));
> }
> #define SPEC_wout_m1_32 0
>
> +#ifndef CONFIG_USER_ONLY
> +static void wout_m1_32a(DisasContext *s, DisasFields *f, DisasOps *o)
> +{
> + tcg_gen_qemu_st_tl(o->out, o->addr1, get_mem_index(s), MO_TEUL |
> MO_ALIGN);
> +}
> +#define SPEC_wout_m1_32a 0
> +#endif
> +
> static void wout_m1_64(DisasContext *s, DisasFields *f, DisasOps *o)
> {
> tcg_gen_qemu_st64(o->out, o->addr1, get_mem_index(s));
> }
> #define SPEC_wout_m1_64 0
>
> +#ifndef CONFIG_USER_ONLY
> +static void wout_m1_64a(DisasContext *s, DisasFields *f, DisasOps *o)
> +{
> + tcg_gen_qemu_st_i64(o->out, o->addr1, get_mem_index(s), MO_TEQ |
> MO_ALIGN);
> +}
> +#define SPEC_wout_m1_64a 0
> +#endif
> +
> static void wout_m2_32(DisasContext *s, DisasFields *f, DisasOps *o)
> {
> tcg_gen_qemu_st32(o->out, o->in2, get_mem_index(s));
> @@ -5657,6 +5680,15 @@ static void in2_m2_32u(DisasContext *s, DisasFields
> *f, DisasOps *o)
> }
> #define SPEC_in2_m2_32u 0
>
> +#ifndef CONFIG_USER_ONLY
> +static void in2_m2_32ua(DisasContext *s, DisasFields *f, DisasOps *o)
> +{
> + in2_a2(s, f, o);
> + tcg_gen_qemu_ld_tl(o->in2, o->in2, get_mem_index(s), MO_TEUL | MO_ALIGN);
> +}
> +#define SPEC_in2_m2_32ua 0
> +#endif
> +
> static void in2_m2_64(DisasContext *s, DisasFields *f, DisasOps *o)
> {
> in2_a2(s, f, o);
> @@ -5664,6 +5696,15 @@ static void in2_m2_64(DisasContext *s, DisasFields *f,
> DisasOps *o)
> }
> #define SPEC_in2_m2_64 0
>
> +#ifndef CONFIG_USER_ONLY
> +static void in2_m2_64a(DisasContext *s, DisasFields *f, DisasOps *o)
> +{
> + in2_a2(s, f, o);
> + tcg_gen_qemu_ld_i64(o->in2, o->in2, get_mem_index(s), MO_TEQ | MO_ALIGN);
> +}
> +#define SPEC_in2_m2_64a 0
> +#endif
> +
> static void in2_mri2_16u(DisasContext *s, DisasFields *f, DisasOps *o)
> {
> in2_ri2(s, f, o);
>
Conny, if there are no new comments, can you make sure to add Richard's
r-b when applying? thanks!
--
Thanks,
David / dhildenb