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| author | Jiandi An <anjiandi@codeaurora.org> | 2016-12-27 18:47:32 -0600 |
|---|---|---|
| committer | Stefano Stabellini <sstabellini@kernel.org> | 2017-01-03 10:06:13 -0800 |
| commit | 0b47a6bd1150f4846b1d61925a4cc5a96593a541 (patch) | |
| tree | ec91ad5336033603d3cf1aa47a8ee5718530edd7 | |
| parent | f9751a60f17eb09e1d1bd036daaddc3ea3a8bed6 (diff) | |
| download | lwn-0b47a6bd1150f4846b1d61925a4cc5a96593a541.tar.gz lwn-0b47a6bd1150f4846b1d61925a4cc5a96593a541.zip | |
Xen: ARM: Zero reserved fields of xatp before making hypervisor call
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>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
| -rw-r--r-- | drivers/xen/arm-device.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/xen/arm-device.c b/drivers/xen/arm-device.c index 778acf80aacb..85dd20e05726 100644 --- a/drivers/xen/arm-device.c +++ b/drivers/xen/arm-device.c @@ -58,9 +58,13 @@ static int xen_map_device_mmio(const struct resource *resources, xen_pfn_t *gpfns; xen_ulong_t *idxs; int *errs; - struct xen_add_to_physmap_range xatp; for (i = 0; i < count; i++) { + struct xen_add_to_physmap_range xatp = { + .domid = DOMID_SELF, + .space = XENMAPSPACE_dev_mmio + }; + r = &resources[i]; nr = DIV_ROUND_UP(resource_size(r), XEN_PAGE_SIZE); if ((resource_type(r) != IORESOURCE_MEM) || (nr == 0)) @@ -87,9 +91,7 @@ static int xen_map_device_mmio(const struct resource *resources, idxs[j] = XEN_PFN_DOWN(r->start) + j; } - xatp.domid = DOMID_SELF; xatp.size = nr; - xatp.space = XENMAPSPACE_dev_mmio; set_xen_guest_handle(xatp.gpfns, gpfns); set_xen_guest_handle(xatp.idxs, idxs); |