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xen64: xen_write_idt_entry() and cvt_gate_to_trap()

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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>
This commit is contained in:
Eduardo Habkost 2008-07-08 15:06:59 -07:00 committed by Ingo Molnar
parent 836fe2f291
commit e176d367d0
1 changed files with 10 additions and 16 deletions
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26
arch/x86/xen/enlighten.c
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@ -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;