From: David Hildenbrand <david@redhat.com>
To: Janosch Frank <frankja@linux.ibm.com>, qemu-devel@nongnu.org
Cc: thuth@redhat.com, pmorel@linux.ibm.com, cohuck@redhat.com,
borntraeger@de.ibm.com, qemu-s390x@nongnu.org,
mihajlov@linux.ibm.com
Subject: Re: [PATCH v5] s390x: kvm: Make kvm_sclp_service_call void
Date: Fri, 29 Nov 2019 10:18:15 +0100 [thread overview]
Message-ID: <e46eb35d-5f8c-f041-e9db-b121dcd8890e@redhat.com> (raw)
In-Reply-To: <20191129091713.4582-1-frankja@linux.ibm.com>
On 29.11.19 10:17, Janosch Frank wrote:
> It defaults to returning 0 anyway and that return value is not
> necessary, as 0 is also the default rc that the caller would return.
>
> While doing that we can simplify the logic a bit and return early if
> we inject a PGM exception.
>
> Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
> Reviewed-by: Thomas Huth <thuth@redhat.com>
> ---
> target/s390x/kvm.c | 12 +++++-------
> 1 file changed, 5 insertions(+), 7 deletions(-)
>
> diff --git a/target/s390x/kvm.c b/target/s390x/kvm.c
> index 0c9d14b4b1..ad6e38c876 100644
> --- a/target/s390x/kvm.c
> +++ b/target/s390x/kvm.c
> @@ -1159,13 +1159,13 @@ void kvm_s390_access_exception(S390CPU *cpu, uint16_t code, uint64_t te_code)
> kvm_s390_vcpu_interrupt(cpu, &irq);
> }
>
> -static int kvm_sclp_service_call(S390CPU *cpu, struct kvm_run *run,
> +static void kvm_sclp_service_call(S390CPU *cpu, struct kvm_run *run,
> uint16_t ipbh0)
> {
> CPUS390XState *env = &cpu->env;
> uint64_t sccb;
> uint32_t code;
> - int r = 0;
> + int r;
>
> sccb = env->regs[ipbh0 & 0xf];
> code = env->regs[(ipbh0 & 0xf0) >> 4];
> @@ -1173,11 +1173,9 @@ static int kvm_sclp_service_call(S390CPU *cpu, struct kvm_run *run,
> r = sclp_service_call(env, sccb, code);
> if (r < 0) {
> kvm_s390_program_interrupt(cpu, -r);
> - } else {
> - setcc(cpu, r);
> + return;
> }
> -
> - return 0;
> + setcc(cpu, r);
> }
>
> static int handle_b2(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)
> @@ -1240,7 +1238,7 @@ static int handle_b2(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)
> setcc(cpu, 3);
> break;
> case PRIV_B2_SCLP_CALL:
> - rc = kvm_sclp_service_call(cpu, run, ipbh0);
> + kvm_sclp_service_call(cpu, run, ipbh0);
> break;
> default:
> rc = -1;
>
Reviewed-by: David Hildenbrand <david@redhat.com>
--
Thanks,
David / dhildenb
next prev parent reply other threads:[~2019-11-29 9:36 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-27 17:50 [PATCH v4 0/6] s390x: Cleanup Janosch Frank
2019-11-27 17:50 ` [PATCH v4 1/6] s390x: Don't do a normal reset on the initial cpu Janosch Frank
2019-11-27 17:50 ` [PATCH v4 2/6] s390x: Move reset normal to shared reset handler Janosch Frank
2019-11-28 6:32 ` Thomas Huth
2019-11-28 17:27 ` Cornelia Huck
2019-11-27 17:50 ` [PATCH v4 3/6] s390x: Move initial reset Janosch Frank
2019-11-28 7:00 ` Thomas Huth
2019-11-28 7:22 ` Janosch Frank
2019-11-28 8:37 ` [PATCH v5] " Janosch Frank
2019-11-28 9:13 ` Thomas Huth
2019-11-27 17:50 ` [PATCH v4 4/6] s390x: Move clear reset Janosch Frank
2019-11-27 18:15 ` David Hildenbrand
2019-11-27 18:28 ` Janosch Frank
2019-11-28 7:09 ` Thomas Huth
2019-11-28 8:35 ` Janosch Frank
2019-11-28 8:38 ` David Hildenbrand
2019-11-27 17:50 ` [PATCH v4 5/6] s390x: Beautify diag308 handling Janosch Frank
2019-11-27 17:50 ` [PATCH v4 6/6] s390x: kvm: Make kvm_sclp_service_call void Janosch Frank
2019-11-27 18:07 ` David Hildenbrand
2019-11-27 18:17 ` David Hildenbrand
2019-11-27 18:25 ` Janosch Frank
2019-11-27 18:38 ` Janosch Frank
2019-11-28 17:34 ` Cornelia Huck
2019-11-29 8:16 ` Janosch Frank
2019-11-29 9:01 ` Cornelia Huck
2019-11-29 9:17 ` [PATCH v5] " Janosch Frank
2019-11-29 9:18 ` David Hildenbrand [this message]
2019-11-28 7:48 ` [PATCH v4 6/6] " Thomas Huth
2019-11-29 10:03 ` [PATCH v4 0/6] s390x: Cleanup Cornelia Huck
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=e46eb35d-5f8c-f041-e9db-b121dcd8890e@redhat.com \
--to=david@redhat.com \
--cc=borntraeger@de.ibm.com \
--cc=cohuck@redhat.com \
--cc=frankja@linux.ibm.com \
--cc=mihajlov@linux.ibm.com \
--cc=pmorel@linux.ibm.com \
--cc=qemu-devel@nongnu.org \
--cc=qemu-s390x@nongnu.org \
--cc=thuth@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).