Mailing List Archive

# HG changeset patch
# User awilliam@xenbuild.aw
# Node ID d8659e39ff3cc8c147d6a5c2a13f7759a2ece27d
# Parent 23fe235cb6d3b3ff75b41608a40ceb0a96c6bd44
[IA64] Add do_callback_ops

Signed-off-by Kevin Tian <kevin.tian@intel.com>
---
linux-2.6-xen-sparse/include/asm-ia64/hypercall.h | 13 +++
xen/arch/ia64/xen/hypercall.c | 84 ++++++++++++++++++++--
xen/include/asm-ia64/domain.h | 2
xen/include/public/arch-ia64.h | 2
4 files changed, 94 insertions(+), 7 deletions(-)

diff -r 23fe235cb6d3 -r d8659e39ff3c linux-2.6-xen-sparse/include/asm-ia64/hypercall.h
--- a/linux-2.6-xen-sparse/include/asm-ia64/hypercall.h Tue May 23 08:18:48 2006 -0600
+++ b/linux-2.6-xen-sparse/include/asm-ia64/hypercall.h Tue May 23 08:24:09 2006 -0600
@@ -313,9 +313,20 @@ HYPERVISOR_suspend(
return rc;
}

+static inline int
+HYPERVISOR_callback_op(
+ int cmd, void *arg)
+{
+ return _hypercall2(int, callback_op, cmd, arg);
+}
+
extern fastcall unsigned int __do_IRQ(unsigned int irq, struct pt_regs *regs);
static inline void exit_idle(void) {}
-#define do_IRQ(irq, regs) __do_IRQ((irq), (regs))
+#define do_IRQ(irq, regs) ({ \
+ irq_enter(); \
+ __do_IRQ((irq), (regs)); \
+ irq_exit(); \
+})

#ifdef CONFIG_XEN_IA64_DOM0_VP
#include <linux/err.h>
diff -r 23fe235cb6d3 -r d8659e39ff3c xen/arch/ia64/xen/hypercall.c
--- a/xen/arch/ia64/xen/hypercall.c Tue May 23 08:18:48 2006 -0600
+++ b/xen/arch/ia64/xen/hypercall.c Tue May 23 08:24:09 2006 -0600
@@ -25,9 +25,12 @@
#include <asm/hw_irq.h>
#include <public/physdev.h>
#include <xen/domain.h>
+#include <public/callback.h>
+#include <xen/event.h>

static long do_physdev_op_compat(XEN_GUEST_HANDLE(physdev_op_t) uop);
static long do_physdev_op(int cmd, XEN_GUEST_HANDLE(void) arg);
+static long do_callback_op(int cmd, XEN_GUEST_HANDLE(void) arg);
/* FIXME: where these declarations should be there ? */
extern int dump_privop_counts_to_user(char *, int);
extern int zero_privop_counts_to_user(char *, int);
@@ -67,7 +70,7 @@ hypercall_t ia64_hypercall_table[] =
(hypercall_t)do_ni_hypercall, /* do_acm_op */
(hypercall_t)do_ni_hypercall, /* do_nmi_op */
(hypercall_t)do_sched_op,
- (hypercall_t)do_ni_hypercall, /* */ /* 30 */
+ (hypercall_t)do_callback_op, /* */ /* 30 */
(hypercall_t)do_ni_hypercall, /* */
(hypercall_t)do_event_channel_op,
(hypercall_t)do_physdev_op,
@@ -200,11 +203,8 @@ fw_hypercall (struct pt_regs *regs)
VCPU(v,pending_interruption) = 1;
#endif
if (regs->r28 == PAL_HALT_LIGHT) {
- int pi;
-#define SPURIOUS_VECTOR 15
- pi = vcpu_check_pending_interrupts(v);
- if (pi != SPURIOUS_VECTOR) {
- if (!VCPU(v,pending_interruption))
+ if (vcpu_deliverable_interrupts(v) ||
+ event_pending(v)) {
idle_when_pending++;
vcpu_pend_unspecified_interrupt(v);
//printf("idle w/int#%d pending!\n",pi);
@@ -435,3 +435,75 @@ long do_event_channel_op_compat(XEN_GUES

return do_event_channel_op(op.cmd, guest_handle_from_ptr(&uop.p->u, void));
}
+
+static long register_guest_callback(struct callback_register *reg)
+{
+ long ret = 0;
+ struct vcpu *v = current;
+
+ if (IS_VMM_ADDRESS(reg->address))
+ return -EINVAL;
+
+ switch ( reg->type )
+ {
+ case CALLBACKTYPE_event:
+ v->arch.event_callback_ip = reg->address;
+ break;
+
+ case CALLBACKTYPE_failsafe:
+ v->arch.failsafe_callback_ip = reg->address;
+ break;
+
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static long unregister_guest_callback(struct callback_unregister *unreg)
+{
+ return -EINVAL ;
+}
+
+/* First time to add callback to xen/ia64, so let's just stick to
+ * the newer callback interface.
+ */
+static long do_callback_op(int cmd, XEN_GUEST_HANDLE(void) arg)
+{
+ long ret;
+
+ switch ( cmd )
+ {
+ case CALLBACKOP_register:
+ {
+ struct callback_register reg;
+
+ ret = -EFAULT;
+ if ( copy_from_guest(&reg, arg, 1) )
+ break;
+
+ ret = register_guest_callback(&reg);
+ }
+ break;
+
+ case CALLBACKOP_unregister:
+ {
+ struct callback_unregister unreg;
+
+ ret = -EFAULT;
+ if ( copy_from_guest(&unreg, arg, 1) )
+ break;
+
+ ret = unregister_guest_callback(&unreg);
+ }
+ break;
+
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
diff -r 23fe235cb6d3 -r d8659e39ff3c xen/include/asm-ia64/domain.h
--- a/xen/include/asm-ia64/domain.h Tue May 23 08:18:48 2006 -0600
+++ b/xen/include/asm-ia64/domain.h Tue May 23 08:24:09 2006 -0600
@@ -86,6 +86,8 @@ struct arch_vcpu {
unsigned long xen_itm;

mapped_regs_t *privregs; /* save the state of vcpu */
+ unsigned long event_callback_ip; // event callback handler
+ unsigned long failsafe_callback_ip; // Do we need it?

/* These fields are copied from arch_domain to make access easier/faster
in assembly code. */
diff -r 23fe235cb6d3 -r d8659e39ff3c xen/include/public/arch-ia64.h
--- a/xen/include/public/arch-ia64.h Tue May 23 08:18:48 2006 -0600
+++ b/xen/include/public/arch-ia64.h Tue May 23 08:24:09 2006 -0600
@@ -320,6 +320,8 @@ struct arch_initrd_info {
};
typedef struct arch_initrd_info arch_initrd_info_t;

+typedef unsigned long xen_callback_t;
+
#define IA64_COMMAND_LINE_SIZE 512
struct vcpu_guest_context {
#define VGCF_FPU_VALID (1<<0)

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