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| author | Ladi Prosek <lprosek@redhat.com> | 2017-10-11 17:54:40 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2017-10-12 15:01:55 +0300 |
| commit | 0234bf885236a41ef05376039f2a8ebe7028a388 (patch) | |
| tree | ce9efe96403c64ef235b626357111d1151f94834 /arch/x86/kvm/emulate.c | |
| parent | d0006530576f1c7a49b2010eac7afdcb5a3613ae (diff) | |
| download | linux-0234bf885236a41ef05376039f2a8ebe7028a388.tar.xz | |
KVM: x86: introduce ISA specific SMM entry/exit callbacks
Entering and exiting SMM may require ISA specific handling under certain
circumstances. This commit adds two new callbacks with empty implementations.
Actual functionality will be added in following commits.
* pre_enter_smm() is to be called when injecting an SMM, before any
SMM related vcpu state has been changed
* pre_leave_smm() is to be called when emulating the RSM instruction,
when the vcpu is in real mode and before any SMM related vcpu state
has been restored
Signed-off-by: Ladi Prosek <lprosek@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 | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index d90cdc77e077..8079d141792a 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -2591,6 +2591,15 @@ static int em_rsm(struct x86_emulate_ctxt *ctxt) ctxt->ops->set_msr(ctxt, MSR_EFER, efer); smbase = ctxt->ops->get_smbase(ctxt); + + /* + * Give pre_leave_smm() a chance to make ISA-specific changes to the + * vCPU state (e.g. enter guest mode) before loading state from the SMM + * state-save area. + */ + if (ctxt->ops->pre_leave_smm(ctxt, smbase)) + return X86EMUL_UNHANDLEABLE; + if (emulator_has_longmode(ctxt)) ret = rsm_load_state_64(ctxt, smbase + 0x8000); else |