aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/kvm/x86_emulate.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/kvm/x86_emulate.c')
-rw-r--r--drivers/kvm/x86_emulate.c16
1 files changed, 3 insertions, 13 deletions
diff --git a/drivers/kvm/x86_emulate.c b/drivers/kvm/x86_emulate.c
index 7439b3422ecf..342594d78d8c 100644
--- a/drivers/kvm/x86_emulate.c
+++ b/drivers/kvm/x86_emulate.c
@@ -213,19 +213,6 @@ static u16 twobyte_table[256] = {
213 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 213 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
214}; 214};
215 215
216/*
217 * Tell the emulator that of the Group 7 instructions (sgdt, lidt, etc.) we
218 * are interested only in invlpg and not in any of the rest.
219 *
220 * invlpg is a special instruction in that the data it references may not
221 * be mapped.
222 */
223void kvm_emulator_want_group7_invlpg(void)
224{
225 twobyte_table[1] &= ~SrcMem;
226}
227EXPORT_SYMBOL_GPL(kvm_emulator_want_group7_invlpg);
228
229/* Type, address-of, and value of an instruction's operand. */ 216/* Type, address-of, and value of an instruction's operand. */
230struct operand { 217struct operand {
231 enum { OP_REG, OP_MEM, OP_IMM } type; 218 enum { OP_REG, OP_MEM, OP_IMM } type;
@@ -791,6 +778,9 @@ done_prefixes:
791 goto srcmem_common; 778 goto srcmem_common;
792 case SrcMem: 779 case SrcMem:
793 src.bytes = (d & ByteOp) ? 1 : op_bytes; 780 src.bytes = (d & ByteOp) ? 1 : op_bytes;
781 /* Don't fetch the address for invlpg: it could be unmapped. */
782 if (twobyte && b == 0x01 && modrm_reg == 7)
783 break;
794 srcmem_common: 784 srcmem_common:
795 src.type = OP_MEM; 785 src.type = OP_MEM;
796 src.ptr = (unsigned long *)cr2; 786 src.ptr = (unsigned long *)cr2;