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authorEduardo Habkost <ehabkost@Rawhide-64.localdomain>2008-07-09 02:06:59 +0400
committerIngo Molnar <mingo@elte.hu>2008-07-16 13:02:15 +0400
commite176d367d0cc8b8efd2e0960c9edf5d2fe7cd9f1 (patch)
tree52d09f9d4a22b67a8a525e94fcb3d79043a62b04 /arch
parent836fe2f291cb450a6193fa713878efe7d32bec6e (diff)
downloadlinux-e176d367d0cc8b8efd2e0960c9edf5d2fe7cd9f1.tar.xz
xen64: xen_write_idt_entry() and cvt_gate_to_trap()
Changed to use the (to-be-)unified descriptor structs. Signed-off-by: Eduardo Habkost <ehabkost@Rawhide-64.localdomain> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Stephen Tweedie <sct@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/xen/enlighten.c26
1 files changed, 10 insertions, 16 deletions
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index da91404fc66c..f5e96f7a4c5c 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -401,23 +401,18 @@ static void xen_write_ldt_entry(struct desc_struct *dt, int entrynum,
preempt_enable();
}
-static int cvt_gate_to_trap(int vector, u32 low, u32 high,
+static int cvt_gate_to_trap(int vector, const gate_desc *val,
struct trap_info *info)
{
- u8 type, dpl;
-
- type = (high >> 8) & 0x1f;
- dpl = (high >> 13) & 3;
-
- if (type != 0xf && type != 0xe)
+ if (val->type != 0xf && val->type != 0xe)
return 0;
info->vector = vector;
- info->address = (high & 0xffff0000) | (low & 0x0000ffff);
- info->cs = low >> 16;
- info->flags = dpl;
+ info->address = gate_offset(*val);
+ info->cs = gate_segment(*val);
+ info->flags = val->dpl;
/* interrupt gates clear IF */
- if (type == 0xe)
+ if (val->type == 0xe)
info->flags |= 4;
return 1;
@@ -444,11 +439,10 @@ static void xen_write_idt_entry(gate_desc *dt, int entrynum, const gate_desc *g)
if (p >= start && (p + 8) <= end) {
struct trap_info info[2];
- u32 *desc = (u32 *)g;
info[1].address = 0;
- if (cvt_gate_to_trap(entrynum, desc[0], desc[1], &info[0]))
+ if (cvt_gate_to_trap(entrynum, g, &info[0]))
if (HYPERVISOR_set_trap_table(info))
BUG();
}
@@ -461,13 +455,13 @@ static void xen_convert_trap_info(const struct desc_ptr *desc,
{
unsigned in, out, count;
- count = (desc->size+1) / 8;
+ count = (desc->size+1) / sizeof(gate_desc);
BUG_ON(count > 256);
for (in = out = 0; in < count; in++) {
- const u32 *entry = (u32 *)(desc->address + in * 8);
+ gate_desc *entry = (gate_desc*)(desc->address) + in;
- if (cvt_gate_to_trap(in, entry[0], entry[1], &traps[out]))
+ if (cvt_gate_to_trap(in, entry, &traps[out]))
out++;
}
traps[out].address = 0;