Commit faf1c63d authored by David Hildenbrand's avatar David Hildenbrand Committed by Richard Henderson
Browse files

target/s390x: Indicate and check for local tlb clearing 



Let's allow to enable it for the qemu cpu model and correctly emulate
it.

Signed-off-by: default avatarDavid Hildenbrand <david@redhat.com>
Message-Id: <20170622094151.28633-2-david@redhat.com>
Signed-off-by: default avatarRichard Henderson <rth@twiddle.net>
parent 159fed45

target/s390x/cpu_models.c

+1 −0
Original line number Diff line number Diff line
@@ -688,6 +688,7 @@ static void add_qemu_cpu_model_features(S390FeatBitmap fbm) 
        S390_FEAT_FLOATING_POINT_SUPPPORT_ENH,

        S390_FEAT_STFLE_45,

        S390_FEAT_STFLE_49,

        S390_FEAT_LOCAL_TLB_CLEARING,

        S390_FEAT_STFLE_53,

    };

    int i;

target/s390x/mem_helper.c

+0 −2
Original line number Diff line number Diff line
@@ -1629,8 +1629,6 @@ void HELPER(ipte)(CPUS390XState *env, uint64_t pto, uint64_t vaddr, 


    /* XXX we exploit the fact that Linux passes the exact virtual

       address here - it's not obliged to! */

    /* XXX: the LC bit should be considered as 0 if the local-TLB-clearing

       facility is not installed.  */

    if (m4 & 1) {

        tlb_flush_page(cs, page);

    } else {

target/s390x/translate.c

+5 −1
Original line number Diff line number Diff line
@@ -2385,7 +2385,11 @@ static ExitStatus op_ipte(DisasContext *s, DisasOps *o) 
    TCGv_i32 m4;



    check_privileged(s);

    if (s390_has_feat(S390_FEAT_LOCAL_TLB_CLEARING)) {

        m4 = tcg_const_i32(get_field(s->fields, m4));

    } else {

        m4 = tcg_const_i32(0);

    }

    gen_helper_ipte(cpu_env, o->in1, o->in2, m4);

    tcg_temp_free_i32(m4);

    return NO_EXIT;