diff options
Diffstat (limited to 'arch/x86/xen/enlighten.c')
| -rw-r--r-- | arch/x86/xen/enlighten.c | 26 |
1 files changed, 10 insertions, 16 deletions
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c index da91404fc66..f5e96f7a4c5 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; |