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From 999cf62d870ff9aa8e9609fcbbcefef9ae1aceb6 Mon Sep 17 00:00:00 2001
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From: Thomas Huth <thuth@redhat.com>
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Date: Fri, 29 May 2020 05:53:50 -0400
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Subject: [PATCH 08/42] s390x: kvm: Make kvm_sclp_service_call void
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Thomas Huth <thuth@redhat.com>
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Message-id: <20200529055420.16855-9-thuth@redhat.com>
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Patchwork-id: 97030
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O-Subject: [RHEL-8.3.0 qemu-kvm PATCH v2 08/38] s390x: kvm: Make kvm_sclp_service_call void
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Bugzilla: 1828317
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RH-Acked-by: Claudio Imbrenda <cimbrend@redhat.com>
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RH-Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com>
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RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
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RH-Acked-by: David Hildenbrand <david@redhat.com>
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From: Janosch Frank <frankja@linux.ibm.com>
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It defaults to returning 0 anyway and that return value is not
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necessary, as 0 is also the default rc that the caller would return.
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While doing that we can simplify the logic a bit and return early if
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we inject a PGM exception.
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Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
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Reviewed-by: Thomas Huth <thuth@redhat.com>
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Message-Id: <20191129091713.4582-1-frankja@linux.ibm.com>
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Reviewed-by: David Hildenbrand <david@redhat.com>
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Signed-off-by: Cornelia Huck <cohuck@redhat.com>
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(cherry picked from commit 15b6c0370c3e2774fd9ffda5c10c6e36952e8eb6)
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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/kvm.c | 12 +++++-------
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1 file changed, 5 insertions(+), 7 deletions(-)
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diff --git a/target/s390x/kvm.c b/target/s390x/kvm.c
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index a02d569537..1c5bc7a2f9 100644
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--- a/target/s390x/kvm.c
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+++ b/target/s390x/kvm.c
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@@ -1159,13 +1159,13 @@ void kvm_s390_access_exception(S390CPU *cpu, uint16_t code, uint64_t te_code)
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kvm_s390_vcpu_interrupt(cpu, &irq);
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}
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-static int kvm_sclp_service_call(S390CPU *cpu, struct kvm_run *run,
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+static void kvm_sclp_service_call(S390CPU *cpu, struct kvm_run *run,
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uint16_t ipbh0)
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{
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CPUS390XState *env = &cpu->env;
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uint64_t sccb;
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uint32_t code;
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- int r = 0;
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+ int r;
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sccb = env->regs[ipbh0 & 0xf];
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code = env->regs[(ipbh0 & 0xf0) >> 4];
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@@ -1173,11 +1173,9 @@ static int kvm_sclp_service_call(S390CPU *cpu, struct kvm_run *run,
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r = sclp_service_call(env, sccb, code);
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if (r < 0) {
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kvm_s390_program_interrupt(cpu, -r);
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- } else {
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- setcc(cpu, r);
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+ return;
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}
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-
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- return 0;
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+ setcc(cpu, r);
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}
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static int handle_b2(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)
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@@ -1240,7 +1238,7 @@ static int handle_b2(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)
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setcc(cpu, 3);
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break;
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case PRIV_B2_SCLP_CALL:
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- rc = kvm_sclp_service_call(cpu, run, ipbh0);
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+ kvm_sclp_service_call(cpu, run, ipbh0);
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break;
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default:
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rc = -1;
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--
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2.27.0
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