# HG changeset patch
# User Jimi Xenidis <[EMAIL PROTECTED]>
# Node ID 2765c83b576d5af048d381c481e33f597c2be258
# Parent 23cc5f7d71e01bc9908026b0f53e310ece230f60
[LINUX][XEN][POWERPC] implement HYPERVISOR_multicall()
Sadly, the xencomm thing makes performing the multicall loop in Xen
prohibitive, so for now we blow it out here. I think some level of
atomicity is expected from the multicall so we precheck all the ops
and the turn off interrupts while we make all the calls.
Signed-off-by: Jimi Xenidis <[EMAIL PROTECTED]>
---
arch/powerpc/platforms/xen/hcall.c | 34 ++++++++++++++++++++++++++++++++--
1 files changed, 32 insertions(+), 2 deletions(-)
diff -r 23cc5f7d71e0 -r 2765c83b576d arch/powerpc/platforms/xen/hcall.c
--- a/arch/powerpc/platforms/xen/hcall.c Mon Oct 09 17:20:44 2006 -0400
+++ b/arch/powerpc/platforms/xen/hcall.c Mon Oct 09 19:57:42 2006 -0400
@@ -189,10 +189,40 @@ HYPERVISOR_poll(
}
EXPORT_SYMBOL(HYPERVISOR_poll);
+typedef ulong (mf_t)(ulong arg0, ...);
+
+static mf_t *multicall_funcs[] = {
+ [__HYPERVISOR_grant_table_op] = (mf_t *)HYPERVISOR_grant_table_op,
+};
+
int HYPERVISOR_multicall(void *call_list, int nr_calls)
{
- BUG();
- return -ENOSYS;
+ /* we blow out the multicall because the xencomm stuff is jsut
+ * too tricky */
+ multicall_entry_t *mcl = (multicall_entry_t *)call_list;
+ multicall_entry_t *c;
+ int i;
+ mf_t *mf;
+ int res;
+ ulong flags;
+
+ /* let make sure all the calls are supported */
+ for (i = 0; i < nr_calls; i++) {
+ mf = multicall_funcs[mcl[i].op];
+ BUG_ON(mf == NULL);
+ }
+ /* disable interrupts until we are done all calls */
+ local_irq_save(flags);
+ for (i = 0; i < nr_calls; i++) {
+ /* lookup supported multicalls */
+ c = &mcl[i];
+ mf = multicall_funcs[c->op];
+ res = mf(c->args[0], c->args[1], c->args[2],
+ c->args[3], c->args[4], c->args[5]);
+ c->result = res;
+ }
+ local_irq_restore(flags);
+ return 0;
}
EXPORT_SYMBOL(HYPERVISOR_multicall);
_______________________________________________
Xen-ppc-devel mailing list
Xen-ppc-devel@lists.xensource.com
http://lists.xensource.com/xen-ppc-devel
