diff options
| author | Andre Przywara <andre.przywara@amd.com> | 2009-06-17 15:50:33 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2009-09-10 08:33:00 +0300 |
| commit | e99f0507125f45b723a9069e9e854c3c4758e7ba (patch) | |
| tree | 97aa934ffe7e03361f60b5b07106ca6746f3cd92 | |
| parent | b1d861431ed58f752b31e8c07da029072989bec7 (diff) | |
KVM: x86 emulator: Prepare for emulation of syscall instructions
Add the flags needed for syscall, sysenter and sysexit to the opcode table.
Catch (but for now ignore) the opcodes in the emulation switch/case.
Signed-off-by: Andre Przywara <andre.przywara@amd.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Christoph Egger <christoph.egger@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
| -rw-r--r-- | arch/x86/kvm/x86_emulate.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/arch/x86/kvm/x86_emulate.c b/arch/x86/kvm/x86_emulate.c index 67af33aeb3f3..b0da29d74032 100644 --- a/arch/x86/kvm/x86_emulate.c +++ b/arch/x86/kvm/x86_emulate.c @@ -32,6 +32,8 @@ #include <linux/module.h> #include <asm/kvm_x86_emulate.h> +#include "mmu.h" /* for is_long_mode() */ + /* * Opcode effective-address decode tables. * Note that we only emulate instructions that have at least one memory @@ -209,7 +211,7 @@ static u32 opcode_table[256] = { static u32 twobyte_table[256] = { /* 0x00 - 0x0F */ - 0, Group | GroupDual | Group7, 0, 0, 0, 0, ImplicitOps, 0, + 0, Group | GroupDual | Group7, 0, 0, 0, ImplicitOps, ImplicitOps, 0, ImplicitOps, ImplicitOps, 0, 0, 0, ImplicitOps | ModRM, 0, 0, /* 0x10 - 0x1F */ 0, 0, 0, 0, 0, 0, 0, 0, ImplicitOps | ModRM, 0, 0, 0, 0, 0, 0, 0, @@ -217,7 +219,9 @@ static u32 twobyte_table[256] = { ModRM | ImplicitOps, ModRM, ModRM | ImplicitOps, ModRM, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x30 - 0x3F */ - ImplicitOps, 0, ImplicitOps, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + ImplicitOps, 0, ImplicitOps, 0, + ImplicitOps, ImplicitOps, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, /* 0x40 - 0x47 */ DstReg | SrcMem | ModRM | Mov, DstReg | SrcMem | ModRM | Mov, DstReg | SrcMem | ModRM | Mov, DstReg | SrcMem | ModRM | Mov, @@ -1988,6 +1992,9 @@ twobyte_insn: goto cannot_emulate; } break; + case 0x05: /* syscall */ + goto cannot_emulate; + break; case 0x06: emulate_clts(ctxt->vcpu); c->dst.type = OP_NONE; @@ -2054,6 +2061,12 @@ twobyte_insn: rc = X86EMUL_CONTINUE; c->dst.type = OP_NONE; break; + case 0x34: /* sysenter */ + goto cannot_emulate; + break; + case 0x35: /* sysexit */ + goto cannot_emulate; + break; case 0x40 ... 0x4f: /* cmov */ c->dst.val = c->dst.orig_val = c->src.val; if (!test_cc(c->b, ctxt->eflags)) |