Commit 21fc97c5 authored by David Hildenbrand's avatar David Hildenbrand Committed by Cornelia Huck
Browse files

s390x/tcg: add various alignment checks 



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: default avatarDavid Hildenbrand <david@redhat.com>
Message-Id: <20180215103822.15179-1-david@redhat.com>
Reviewed-by: default avatarRichard Henderson <richard.henderson@linaro.org>
Signed-off-by: default avatarCornelia Huck <cohuck@redhat.com>
parent f26852aa

target/s390x/insn-data.def

+8 −8
Original line number Diff line number Diff line
@@ -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 */

target/s390x/mem_helper.c

+25 −0
Original line number Diff line number Diff line
@@ -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);

target/s390x/translate.c

+42 −1
Original line number Diff line number Diff line
@@ -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);