[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v6 01/11] arch, arm: domain build: let dom0 access I/O memory of mapped devices
Currently, dom0 is allowed access to the I/O memory ranges used to access devices exposed to it, but it doesn't have those ranges in its iomem_caps. This commit attempts to implement the correct bookkeeping in the generic function which actually maps a device's I/O memory to the domain, adding the ranges to the domain's iomem_caps. Signed-off-by: Arianna Avanzini <avanzini.arianna@xxxxxxxxx> Acked-by: Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx> Acked-by: Julien Grall <julien.grall@xxxxxxxxxx> Cc: Dario Faggioli <dario.faggioli@xxxxxxxxxx> Cc: Paolo Valente <paolo.valente@xxxxxxxxxx> Cc: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx> Cc: Jan Beulich <JBeulich@xxxxxxxx> Cc: Keir Fraser <keir@xxxxxxx> Cc: Tim Deegan <tim@xxxxxxx> Cc: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx> Cc: Eric Trudeau <etrudeau@xxxxxxxxxxxx> Cc: Viktor Kleinik <viktor.kleinik@xxxxxxxxxxxxxxx> --- v4: - Hopefully improve commit description. v3: - Print the domain id in the error message instead of always printing "dom0". - Fix commit description. --- xen/arch/arm/domain_build.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c index 187e071..1802b6e 100644 --- a/xen/arch/arm/domain_build.c +++ b/xen/arch/arm/domain_build.c @@ -11,6 +11,7 @@ #include <xen/device_tree.h> #include <xen/libfdt/libfdt.h> #include <xen/guest_access.h> +#include <xen/iocap.h> #include <asm/setup.h> #include <asm/platform.h> #include <asm/psci.h> @@ -740,6 +741,16 @@ static int map_device(struct domain *d, const struct dt_device_node *dev) DPRINT("addr %u = 0x%"PRIx64" - 0x%"PRIx64"\n", i, addr, addr + size - 1); + res = iomem_permit_access(d, paddr_to_pfn(addr & PAGE_MASK), + paddr_to_pfn(PAGE_ALIGN(addr + size - 1))); + if ( res ) + { + printk(XENLOG_ERR "Unable to permit to dom%d access to" + " 0x%"PRIx64" - 0x%"PRIx64"\n", + d->domain_id, + addr & PAGE_MASK, PAGE_ALIGN(addr + size) - 1); + return res; + } res = map_mmio_regions(d, addr & PAGE_MASK, PAGE_ALIGN(addr + size) - 1, addr & PAGE_MASK); -- 1.9.1 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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