From: Cornelia Huck <cohuck@redhat.com>
To: Pierre Morel <pmorel@linux.ibm.com>
Cc: kvm@vger.kernel.org, linux-s390@vger.kernel.org,
frankja@linux.ibm.com, david@redhat.com, thuth@redhat.com
Subject: Re: [kvm-unit-tests PATCH v2 7/9] s390x: css: msch, enable test
Date: Mon, 2 Dec 2019 15:30:16 +0100 [thread overview]
Message-ID: <20191202153016.382e3fa8.cohuck@redhat.com> (raw)
In-Reply-To: <1574945167-29677-8-git-send-email-pmorel@linux.ibm.com>
On Thu, 28 Nov 2019 13:46:05 +0100
Pierre Morel <pmorel@linux.ibm.com> wrote:
> A second step when testing the channel subsystem is to prepare a channel
> for use.
>
> This tests the success of the MSCH instruction by enabling a channel.
>
> Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
> ---
> s390x/css.c | 27 +++++++++++++++++++++++++++
> 1 file changed, 27 insertions(+)
>
> diff --git a/s390x/css.c b/s390x/css.c
> index 8186f55..e42dc2f 100644
> --- a/s390x/css.c
> +++ b/s390x/css.c
> @@ -62,11 +62,38 @@ static void test_enumerate(void)
> return;
> }
>
> +static void set_schib(void)
> +{
> + struct pmcw *p = &schib.pmcw;
> +
> + p->intparm = 0xdeadbeef;
> + p->flags |= PMCW_ENABLE;
> +}
> +
> +static void test_enable(void)
> +{
> + int ret;
> +
> + if (!test_device_sid) {
> + report_skip("No device");
> + return;
> + }
> + set_schib();
> + dump_schib(&schib);
> +
> + ret = msch(test_device_sid, &schib);
> + if (ret)
> + report("msch cc=%d", 0, ret);
Maybe do a stsch and then check/dump the contents of the schib again?
Background: The architecture allows that msch returns success, but that
the fields modified by the issuer remain unchanged at the subchannel
regardless. That should not happen with QEMU; but I remember versions
of z/VM where we sometimes had to call msch twice to make changes stick.
> + else
> + report("Tested", 1);
> +}
> +
> static struct {
> const char *name;
> void (*func)(void);
> } tests[] = {
> { "enumerate (stsch)", test_enumerate },
> + { "enable (msch)", test_enable },
> { NULL, NULL }
> };
>
next prev parent reply other threads:[~2019-12-02 14:30 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-28 12:45 [kvm-unit-tests PATCH v2 0/9] s390x: Testing the Channel Subsystem I/O Pierre Morel
2019-11-28 12:45 ` [kvm-unit-tests PATCH v2 1/9] s390x: saving regs for interrupts Pierre Morel
2019-11-28 12:46 ` [kvm-unit-tests PATCH v2 2/9] s390x: Define the PSW bits Pierre Morel
2019-11-28 14:36 ` David Hildenbrand
2019-11-28 19:16 ` Pierre Morel
2019-11-28 19:48 ` David Hildenbrand
2019-11-29 13:04 ` Pierre Morel
2019-12-02 11:11 ` Janosch Frank
2019-12-02 11:17 ` David Hildenbrand
2019-12-02 16:52 ` Pierre Morel
2019-11-28 12:46 ` [kvm-unit-tests PATCH v2 3/9] s390x: irq: make IRQ handler weak Pierre Morel
2019-11-29 12:01 ` David Hildenbrand
2019-12-02 10:41 ` Thomas Huth
2019-12-02 16:55 ` Pierre Morel
2019-11-28 12:46 ` [kvm-unit-tests PATCH v2 4/9] s390x: export the clock get_clock_ms() utility Pierre Morel
2019-11-29 12:03 ` David Hildenbrand
2019-11-29 13:04 ` Pierre Morel
2019-12-02 11:13 ` Janosch Frank
2019-12-02 17:03 ` Pierre Morel
2019-11-28 12:46 ` [kvm-unit-tests PATCH v2 5/9] s390x: Library resources for CSS tests Pierre Morel
2019-12-02 14:06 ` Cornelia Huck
2019-12-02 17:33 ` Pierre Morel
2019-11-28 12:46 ` [kvm-unit-tests PATCH v2 6/9] s390x: css: stsch, enumeration test Pierre Morel
2019-12-02 14:22 ` Cornelia Huck
2019-12-02 17:53 ` Pierre Morel
2019-12-02 18:15 ` Cornelia Huck
2019-12-02 18:33 ` Pierre Morel
2019-12-02 19:49 ` Cornelia Huck
2019-12-03 8:43 ` Pierre Morel
2019-11-28 12:46 ` [kvm-unit-tests PATCH v2 7/9] s390x: css: msch, enable test Pierre Morel
2019-12-02 14:30 ` Cornelia Huck [this message]
2019-12-02 17:55 ` Pierre Morel
2019-11-28 12:46 ` [kvm-unit-tests PATCH v2 8/9] s390x: css: ssch/tsch with sense and interrupt Pierre Morel
2019-12-02 14:55 ` Cornelia Huck
2019-12-02 18:18 ` Pierre Morel
2019-12-02 19:54 ` Cornelia Huck
2019-12-03 8:58 ` Pierre Morel
2019-11-28 12:46 ` [kvm-unit-tests PATCH v2 9/9] s390x: css: ping pong Pierre Morel
2019-12-02 15:03 ` Cornelia Huck
2019-12-02 18:25 ` Pierre Morel
2019-12-06 14:18 ` Pierre Morel
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