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| author | Paolo Bonzini <pbonzini@redhat.com> | 2015-05-07 11:36:11 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2015-06-04 16:01:45 +0200 |
| commit | 64d6067057d9658acb8675afcfba549abdb7fc16 (patch) | |
| tree | 1a7e8d52c083c5cd2bbab2f132437c03fdfeb171 /arch/x86/kvm/emulate.c | |
| parent | f077825a8758d79838a757dafb79adcdd047ef3a (diff) | |
| download | lwn-64d6067057d9658acb8675afcfba549abdb7fc16.tar.gz lwn-64d6067057d9658acb8675afcfba549abdb7fc16.zip | |
KVM: x86: stubs for SMM support
This patch adds the interface between x86.c and the emulator: the
SMBASE register, a new emulator flag, the RSM instruction. It also
adds a new request bit that will be used by the KVM_SMI ioctl.
Reviewed-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/emulate.c')
| -rw-r--r-- | arch/x86/kvm/emulate.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index a1c6c25552e9..e763a9b8c26b 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -2259,6 +2259,14 @@ static int em_lseg(struct x86_emulate_ctxt *ctxt) return rc; } +static int em_rsm(struct x86_emulate_ctxt *ctxt) +{ + if ((ctxt->emul_flags & X86EMUL_SMM_MASK) == 0) + return emulate_ud(ctxt); + + return X86EMUL_UNHANDLEABLE; +} + static void setup_syscalls_segments(struct x86_emulate_ctxt *ctxt, struct desc_struct *cs, struct desc_struct *ss) @@ -4197,7 +4205,7 @@ static const struct opcode twobyte_table[256] = { F(DstMem | SrcReg | Src2CL | ModRM, em_shld), N, N, /* 0xA8 - 0xAF */ I(Stack | Src2GS, em_push_sreg), I(Stack | Src2GS, em_pop_sreg), - DI(ImplicitOps, rsm), + II(No64 | EmulateOnUD | ImplicitOps, em_rsm, rsm), F(DstMem | SrcReg | ModRM | BitOp | Lock | PageTable, em_bts), F(DstMem | SrcReg | Src2ImmByte | ModRM, em_shrd), F(DstMem | SrcReg | Src2CL | ModRM, em_shrd), |