From: Cornelia Huck <cornelia.huck@de.ibm.com>
To: mst@redhat.com
Cc: pasic@linux.vnet.ibm.com,
virtualization@lists.linux-foundation.org,
linux-kernel@vger.kernel.org,
Cornelia Huck <cornelia.huck@de.ibm.com>
Subject: [PATCH 2/2] tools/virtio/ringtest: tweaks for s390
Date: Mon, 19 Sep 2016 17:06:56 +0200 [thread overview]
Message-ID: <20160919150656.6194-3-cornelia.huck@de.ibm.com> (raw)
In-Reply-To: <20160919150656.6194-1-cornelia.huck@de.ibm.com>
From: Halil Pasic <pasic@linux.vnet.ibm.com>
Make ringtest work on s390 too.
Signed-off-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Acked-by: Sascha Silbe <silbe@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
---
tools/virtio/ringtest/main.h | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/tools/virtio/ringtest/main.h b/tools/virtio/ringtest/main.h
index 16917ac..7806b7b 100644
--- a/tools/virtio/ringtest/main.h
+++ b/tools/virtio/ringtest/main.h
@@ -26,6 +26,16 @@ static inline void wait_cycles(unsigned long long cycles)
#define VMEXIT_CYCLES 500
#define VMENTRY_CYCLES 500
+#elif defined(__s390x__)
+static inline void wait_cycles(unsigned long long cycles)
+{
+ asm volatile("0: brctg %0,0b" : : "d" (cycles));
+}
+
+/* tweak me */
+#define VMEXIT_CYCLES 200
+#define VMENTRY_CYCLES 200
+
#else
static inline void wait_cycles(unsigned long long cycles)
{
@@ -81,6 +91,8 @@ extern unsigned ring_size;
/* Is there a portable way to do this? */
#if defined(__x86_64__) || defined(__i386__)
#define cpu_relax() asm ("rep; nop" ::: "memory")
+#elif defined(__s390x__)
+#define cpu_relax() barrier()
#else
#define cpu_relax() assert(0)
#endif
--
2.8.4
prev parent reply other threads:[~2016-09-19 15:07 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-19 15:06 [PATCH 0/2] virtio-ringtest: more enablement Cornelia Huck
2016-09-19 15:06 ` [PATCH 1/2] tools/virtio/ringtest: fix run-on-all.sh for offline cpus Cornelia Huck
2016-09-19 15:06 ` Cornelia Huck [this message]
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=20160919150656.6194-3-cornelia.huck@de.ibm.com \
--to=cornelia.huck@de.ibm.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mst@redhat.com \
--cc=pasic@linux.vnet.ibm.com \
--cc=virtualization@lists.linux-foundation.org \
/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).