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KVM: x86: introduce ISA specific SMM entry/exit callbacks

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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>
This commit is contained in:
Ladi Prosek
2017-10-11 16:54:40 +02:00
committed by Paolo Bonzini
parent d000653057
commit 0234bf8852
6 changed files with 58 additions and 1 deletions
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15
arch/x86/kvm/svm.c
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@@ -5401,6 +5401,18 @@ static void svm_setup_mce(struct kvm_vcpu *vcpu)
vcpu->arch.mcg_cap &= 0x1ff;
}
static int svm_pre_enter_smm(struct kvm_vcpu *vcpu, char *smstate)
{
/* TODO: Implement */
return 0;
}
static int svm_pre_leave_smm(struct kvm_vcpu *vcpu, u64 smbase)
{
/* TODO: Implement */
return 0;
}
static struct kvm_x86_ops svm_x86_ops __ro_after_init = {
.cpu_has_kvm_support = has_svm,
.disabled_by_bios = is_disabled,
@@ -5511,6 +5523,9 @@ static struct kvm_x86_ops svm_x86_ops __ro_after_init = {
.deliver_posted_interrupt = svm_deliver_avic_intr,
.update_pi_irte = svm_update_pi_irte,
.setup_mce = svm_setup_mce,
.pre_enter_smm = svm_pre_enter_smm,
.pre_leave_smm = svm_pre_leave_smm,
};
static int __init svm_init(void)