From: Pierre Morel <pmorel@linux.ibm.com>
To: kvm@vger.kernel.org
Cc: linux-s390@vger.kernel.org, frankja@linux.ibm.com,
david@redhat.com, thuth@redhat.com, cohuck@redhat.com
Subject: [kvm-unit-tests PATCH v4 7/9] s390x: css: msch, enable test
Date: Wed, 11 Dec 2019 16:46:08 +0100 [thread overview]
Message-ID: <1576079170-7244-8-git-send-email-pmorel@linux.ibm.com> (raw)
In-Reply-To: <1576079170-7244-1-git-send-email-pmorel@linux.ibm.com>
A second step when testing the channel subsystem is to prepare a channel
for use.
This includes:
- Get the current SubCHannel Information Block (SCHIB) using STSCH
- Update it in memory to set the ENABLE bit
- Tell the CSS that the SCHIB has been modified using MSCH
- Get the SCHIB from the CSS again to verify that the subchannel is
enabled.
This tests the success of the MSCH instruction by enabling a channel.
Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
---
s390x/css.c | 65 +++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 65 insertions(+)
diff --git a/s390x/css.c b/s390x/css.c
index dfab35f..b8824ad 100644
--- a/s390x/css.c
+++ b/s390x/css.c
@@ -19,12 +19,24 @@
#include <asm/time.h>
#include <css.h>
+#include <asm/time.h>
#define SID_ONE 0x00010000
static struct schib schib;
static int test_device_sid;
+static inline void delay(unsigned long ms)
+{
+ unsigned long startclk;
+
+ startclk = get_clock_ms();
+ for (;;) {
+ if (get_clock_ms() - startclk > ms)
+ break;
+ }
+}
+
static void test_enumerate(void)
{
struct pmcw *pmcw = &schib.pmcw;
@@ -64,11 +76,64 @@ out:
report(1, "Devices, tested: %d, I/O type: %d", scn, scn_found);
}
+static void test_enable(void)
+{
+ struct pmcw *pmcw = &schib.pmcw;
+ int count = 0;
+ int cc;
+
+ if (!test_device_sid) {
+ report_skip("No device");
+ return;
+ }
+ /* Read the SCHIB for this subchannel */
+ cc = stsch(test_device_sid, &schib);
+ if (cc) {
+ report(0, "stsch cc=%d", cc);
+ return;
+ }
+
+ /* Update the SCHIB to enable the channel */
+ pmcw->flags |= PMCW_ENABLE;
+
+ /* Tell the CSS we want to modify the subchannel */
+ cc = msch(test_device_sid, &schib);
+ if (cc) {
+ /*
+ * If the subchannel is status pending or
+ * if a function is in progress,
+ * we consider both cases as errors.
+ */
+ report(0, "msch cc=%d", cc);
+ return;
+ }
+
+ /*
+ * Read the SCHIB again to verify the enablement
+ * insert a little delay and try 5 times.
+ */
+ do {
+ cc = stsch(test_device_sid, &schib);
+ if (cc) {
+ report(0, "stsch cc=%d", cc);
+ return;
+ }
+ delay(10);
+ } while (!(pmcw->flags & PMCW_ENABLE) && count++ < 5);
+
+ if (!(pmcw->flags & PMCW_ENABLE)) {
+ report(0, "Enable failed. pmcw: %x", pmcw->flags);
+ return;
+ }
+ report(1, "Tested");
+}
+
static struct {
const char *name;
void (*func)(void);
} tests[] = {
{ "enumerate (stsch)", test_enumerate },
+ { "enable (msch)", test_enable },
{ NULL, NULL }
};
--
2.17.0
next prev parent reply other threads:[~2019-12-11 15:46 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-11 15:46 [kvm-unit-tests PATCH v4 0/9] s390x: Testing the Channel Subsystem I/O Pierre Morel
2019-12-11 15:46 ` [kvm-unit-tests PATCH v4 1/9] s390x: saving regs for interrupts Pierre Morel
2019-12-12 9:24 ` Janosch Frank
2019-12-12 13:32 ` Pierre Morel
2019-12-11 15:46 ` [kvm-unit-tests PATCH v4 2/9] s390x: Use PSW bits definitions in cstart Pierre Morel
2019-12-12 9:31 ` Janosch Frank
2019-12-12 13:34 ` Pierre Morel
2019-12-11 15:46 ` [kvm-unit-tests PATCH v4 3/9] s390x: interrupt registration Pierre Morel
2019-12-12 9:39 ` Janosch Frank
2019-12-12 13:35 ` Pierre Morel
2019-12-12 9:41 ` Janosch Frank
2019-12-12 13:35 ` Pierre Morel
2019-12-11 15:46 ` [kvm-unit-tests PATCH v4 4/9] s390x: export the clock get_clock_ms() utility Pierre Morel
2019-12-12 9:40 ` Janosch Frank
2019-12-12 13:36 ` Pierre Morel
2019-12-11 15:46 ` [kvm-unit-tests PATCH v4 5/9] s390x: Library resources for CSS tests Pierre Morel
2019-12-12 9:51 ` Janosch Frank
2019-12-12 13:43 ` Pierre Morel
2019-12-11 15:46 ` [kvm-unit-tests PATCH v4 6/9] s390x: css: stsch, enumeration test Pierre Morel
2019-12-12 10:18 ` Cornelia Huck
2019-12-12 13:50 ` Pierre Morel
2019-12-11 15:46 ` Pierre Morel [this message]
2019-12-12 12:01 ` [kvm-unit-tests PATCH v4 7/9] s390x: css: msch, enable test Cornelia Huck
2019-12-12 14:01 ` Pierre Morel
2019-12-12 14:10 ` Cornelia Huck
2019-12-12 14:21 ` Pierre Morel
2019-12-12 14:33 ` Cornelia Huck
2019-12-12 16:05 ` Pierre Morel
2019-12-12 17:33 ` Pierre Morel
2019-12-13 9:33 ` Cornelia Huck
2019-12-13 14:40 ` Pierre Morel
2019-12-11 15:46 ` [kvm-unit-tests PATCH v4 8/9] s390x: css: ssch/tsch with sense and interrupt Pierre Morel
2019-12-12 12:26 ` Cornelia Huck
2019-12-12 14:10 ` Pierre Morel
2019-12-12 18:20 ` Pierre Morel
2019-12-13 9:43 ` Cornelia Huck
2019-12-13 15:24 ` Pierre Morel
2019-12-13 15:53 ` Cornelia Huck
2019-12-11 15:46 ` [kvm-unit-tests PATCH v4 9/9] s390x: css: ping pong Pierre Morel
2019-12-13 9:50 ` Cornelia Huck
2019-12-13 16:50 ` Pierre Morel
2019-12-16 10:54 ` 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=1576079170-7244-8-git-send-email-pmorel@linux.ibm.com \
--to=pmorel@linux.ibm.com \
--cc=cohuck@redhat.com \
--cc=david@redhat.com \
--cc=frankja@linux.ibm.com \
--cc=kvm@vger.kernel.org \
--cc=linux-s390@vger.kernel.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.