From: Jiandi An <anjiandi@codeaurora.org>
To: boris.ostrovsky@oracle.com, jgross@suse.com,
xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org
Cc: julien.grall@arm.com, sstabellini@kernel.org,
shankerd@codeaurora.org, shannon.zhao@linaro.org,
Jiandi An <anjiandi@codeaurora.org>
Subject: [PATCH] Xen: ARM: Zero reserved fields of xatp before making hypervisor call
Date: Sun, 18 Dec 2016 20:56:38 -0600 [thread overview]
Message-ID: <1482116198-28940-1-git-send-email-anjiandi@codeaurora.org> (raw)
Ensure all reserved fields of xatp are zero before making hypervisor
call to XEN in xen_map_device_mmio(). xenmem_add_to_physmap_one() in
XEN fails the mapping request if extra.res reserved field in xatp is
not zero for XENMAPSPACE_dev_mmio request.
Signed-off-by: Jiandi An <anjiandi@codeaurora.org>
---
drivers/xen/arm-device.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/xen/arm-device.c b/drivers/xen/arm-device.c
index 778acf8..208273b 100644
--- a/drivers/xen/arm-device.c
+++ b/drivers/xen/arm-device.c
@@ -87,6 +87,9 @@ static int xen_map_device_mmio(const struct resource *resources,
idxs[j] = XEN_PFN_DOWN(r->start) + j;
}
+ /* Ensure reserved fields are set to zero */
+ memset(&xatp, 0, sizeof(xatp));
+
xatp.domid = DOMID_SELF;
xatp.size = nr;
xatp.space = XENMAPSPACE_dev_mmio;
--
Jiandi An
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.
next reply other threads:[~2016-12-19 2:56 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-19 2:56 Jiandi An [this message]
2016-12-19 12:14 ` [PATCH] Xen: ARM: Zero reserved fields of xatp before making hypervisor call Juergen Gross
2016-12-19 18:49 ` Stefano Stabellini
2016-12-20 5:02 ` Jiandi An
2016-12-20 9:57 ` Juergen Gross
2016-12-20 10:31 ` Julien Grall
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