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From cfc375b3dcc391e8895884ff0fe58bdd1652b2d7 Mon Sep 17 00:00:00 2001
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From: David Hildenbrand <david@redhat.com>
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Date: Fri, 21 Dec 2018 15:36:09 +0000
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Subject: [PATCH 07/22] s390x/tcg: implement SET CLOCK
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RH-Author: David Hildenbrand <david@redhat.com>
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Message-id: <20181221153614.27961-8-david@redhat.com>
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Patchwork-id: 83748
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O-Subject: [RHEL-8.0 qemu-kvm v2 PATCH 07/12] s390x/tcg: implement SET CLOCK
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Bugzilla: 1653569
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RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
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RH-Acked-by: Thomas Huth <thuth@redhat.com>
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RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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Conflicts:
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target/s390x/translate.c: ExitStatus vs. DisasJumpType
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This allows a guest to change its TOD. We already take care of updating
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all CKC timers from within S390TODClass.
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Use MO_ALIGN to load the operand manually - this will properly trigger a
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SPECIFICATION exception.
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Acked-by: Thomas Huth <thuth@redhat.com>
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Signed-off-by: David Hildenbrand <david@redhat.com>
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Message-Id: <20180627134410.4901-8-david@redhat.com>
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Signed-off-by: Cornelia Huck <cohuck@redhat.com>
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(cherry picked from commit 9dc6753718d4c0fe327729fea94e4d9f3f5a3d17)
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Signed-off-by: David Hildenbrand <david@redhat.com>
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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target/s390x/helper.h | 1 +
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target/s390x/insn-data.def | 3 +--
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target/s390x/misc_helper.c | 16 ++++++++++++++++
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target/s390x/translate.c | 9 +++++++++
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4 files changed, 27 insertions(+), 2 deletions(-)
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diff --git a/target/s390x/helper.h b/target/s390x/helper.h
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index 59cba86..97c60ca 100644
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--- a/target/s390x/helper.h
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+++ b/target/s390x/helper.h
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@@ -127,6 +127,7 @@ DEF_HELPER_4(diag, void, env, i32, i32, i32)
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DEF_HELPER_3(load_psw, noreturn, env, i64, i64)
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DEF_HELPER_FLAGS_2(spx, TCG_CALL_NO_RWG, void, env, i64)
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DEF_HELPER_FLAGS_1(stck, TCG_CALL_NO_RWG_SE, i64, env)
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+DEF_HELPER_FLAGS_2(sck, TCG_CALL_NO_RWG, i32, env, i64)
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DEF_HELPER_FLAGS_2(sckc, TCG_CALL_NO_RWG, void, env, i64)
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DEF_HELPER_FLAGS_2(sckpf, TCG_CALL_NO_RWG, void, env, i64)
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DEF_HELPER_FLAGS_1(stckc, TCG_CALL_NO_RWG, i64, env)
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diff --git a/target/s390x/insn-data.def b/target/s390x/insn-data.def
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index 1576194..5c6f33e 100644
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--- a/target/s390x/insn-data.def
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+++ b/target/s390x/insn-data.def
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@@ -997,8 +997,7 @@
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/* SET ADDRESS SPACE CONTROL FAST */
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C(0xb279, SACF, S, Z, 0, a2, 0, 0, sacf, 0)
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/* SET CLOCK */
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- /* ??? Not implemented - is it necessary? */
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- C(0xb204, SCK, S, Z, 0, 0, 0, 0, 0, 0)
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+ C(0xb204, SCK, S, Z, la2, 0, 0, 0, sck, 0)
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/* SET CLOCK COMPARATOR */
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C(0xb206, SCKC, S, Z, 0, m2_64a, 0, 0, sckc, 0)
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/* SET CLOCK PROGRAMMABLE FIELD */
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diff --git a/target/s390x/misc_helper.c b/target/s390x/misc_helper.c
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index cada7af..d629b2f 100644
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--- a/target/s390x/misc_helper.c
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+++ b/target/s390x/misc_helper.c
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@@ -185,6 +185,22 @@ void tcg_s390_tod_updated(CPUState *cs, run_on_cpu_data opaque)
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helper_sckc(env, env->ckc);
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}
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+/* Set Clock */
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+uint32_t HELPER(sck)(CPUS390XState *env, uint64_t tod_low)
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+{
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+ S390TODState *td = s390_get_todstate();
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+ S390TODClass *tdc = S390_TOD_GET_CLASS(td);
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+ S390TOD tod = {
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+ .high = 0,
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+ .low = tod_low,
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+ };
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+
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+ qemu_mutex_lock_iothread();
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+ tdc->set(td, &tod, &error_abort);
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+ qemu_mutex_unlock_iothread();
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+ return 0;
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+}
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+
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/* Set Tod Programmable Field */
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void HELPER(sckpf)(CPUS390XState *env, uint64_t r0)
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{
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diff --git a/target/s390x/translate.c b/target/s390x/translate.c
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index 7d39ab3..ed9aff4 100644
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--- a/target/s390x/translate.c
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+++ b/target/s390x/translate.c
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@@ -4015,6 +4015,15 @@ static ExitStatus op_stcke(DisasContext *s, DisasOps *o)
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return NO_EXIT;
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}
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+static ExitStatus op_sck(DisasContext *s, DisasOps *o)
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+{
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+ check_privileged(s);
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+ tcg_gen_qemu_ld_i64(o->in1, o->addr1, get_mem_index(s), MO_TEQ | MO_ALIGN);
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+ gen_helper_sck(cc_op, cpu_env, o->in1);
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+ set_cc_static(s);
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+ return NO_EXIT;
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+}
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+
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static ExitStatus op_sckc(DisasContext *s, DisasOps *o)
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{
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check_privileged(s);
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--
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1.8.3.1
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