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authorArnd Bergmann <arnd@arndb.de>2012-11-16 16:42:59 +0100
committerArnd Bergmann <arnd@arndb.de>2012-11-16 16:42:59 +0100
commit57260e4088894de25bb1837d529708c3ec705a69 (patch)
treee7072aed15b203197549099371db55c5d4bc3c0a /drivers/xen/fallback.c
parent2d4d07b97c0b774ea9ce2a2105818208d3df7241 (diff)
parent3d5e2abe6e265acc5e1fda810301243e9bac92b2 (diff)
Merge tag 'imx-fixes-rc' of git://git.pengutronix.de/git/imx/linux-2.6 into fixes
From Sascha Hauer <s.hauer@pengutronix.de>: ARM i.MX fixes for 3.7-rc * tag 'imx-fixes-rc' of git://git.pengutronix.de/git/imx/linux-2.6: ARM: imx: ehci: fix host power mask bit ARM i.MX: fix error-valued pointer dereference in clk_register_gate2() Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'drivers/xen/fallback.c')
-rw-r--r--drivers/xen/fallback.c80
1 files changed, 80 insertions, 0 deletions
diff --git a/drivers/xen/fallback.c b/drivers/xen/fallback.c
new file mode 100644
index 00000000000..0ef7c4d40f8
--- /dev/null
+++ b/drivers/xen/fallback.c
@@ -0,0 +1,80 @@
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/bug.h>
+#include <linux/export.h>
+#include <asm/hypervisor.h>
+#include <asm/xen/hypercall.h>
+
+int xen_event_channel_op_compat(int cmd, void *arg)
+{
+ struct evtchn_op op;
+ int rc;
+
+ op.cmd = cmd;
+ memcpy(&op.u, arg, sizeof(op.u));
+ rc = _hypercall1(int, event_channel_op_compat, &op);
+
+ switch (cmd) {
+ case EVTCHNOP_close:
+ case EVTCHNOP_send:
+ case EVTCHNOP_bind_vcpu:
+ case EVTCHNOP_unmask:
+ /* no output */
+ break;
+
+#define COPY_BACK(eop) \
+ case EVTCHNOP_##eop: \
+ memcpy(arg, &op.u.eop, sizeof(op.u.eop)); \
+ break
+
+ COPY_BACK(bind_interdomain);
+ COPY_BACK(bind_virq);
+ COPY_BACK(bind_pirq);
+ COPY_BACK(status);
+ COPY_BACK(alloc_unbound);
+ COPY_BACK(bind_ipi);
+#undef COPY_BACK
+
+ default:
+ WARN_ON(rc != -ENOSYS);
+ break;
+ }
+
+ return rc;
+}
+EXPORT_SYMBOL_GPL(xen_event_channel_op_compat);
+
+int HYPERVISOR_physdev_op_compat(int cmd, void *arg)
+{
+ struct physdev_op op;
+ int rc;
+
+ op.cmd = cmd;
+ memcpy(&op.u, arg, sizeof(op.u));
+ rc = _hypercall1(int, physdev_op_compat, &op);
+
+ switch (cmd) {
+ case PHYSDEVOP_IRQ_UNMASK_NOTIFY:
+ case PHYSDEVOP_set_iopl:
+ case PHYSDEVOP_set_iobitmap:
+ case PHYSDEVOP_apic_write:
+ /* no output */
+ break;
+
+#define COPY_BACK(pop, fld) \
+ case PHYSDEVOP_##pop: \
+ memcpy(arg, &op.u.fld, sizeof(op.u.fld)); \
+ break
+
+ COPY_BACK(irq_status_query, irq_status_query);
+ COPY_BACK(apic_read, apic_op);
+ COPY_BACK(ASSIGN_VECTOR, irq_op);
+#undef COPY_BACK
+
+ default:
+ WARN_ON(rc != -ENOSYS);
+ break;
+ }
+
+ return rc;
+}