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KVM: s390: handle machine checks when guest is running

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The low-level interrupt handler on s390 checks for _TIF_WORK_INT and
exits the guest context, if work is pending.
TIF_WORK_INT is defined as_TIF_SIGPENDING | _TIF_NEED_RESCHED |
 _TIF_MCCK_PENDING. Currently the sie loop checks for signals and
reschedule, but it does not check for machine checks. That means that
we exit the guest context if a machine check is pending, but we do not
handle the machine check.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
CC: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Christian Borntraeger 2008-05-21 13:37:34 +02:00 committed by Avi Kivity
parent 74b6b522ec
commit 71cde5879f
2 changed files with 6 additions and 0 deletions
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5
arch/s390/kvm/kvm-s390.c
View File

@ -423,6 +423,8 @@ int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
return -EINVAL; /* not implemented yet */
}
extern void s390_handle_mcck(void);
static void __vcpu_run(struct kvm_vcpu *vcpu)
{
memcpy(&vcpu->arch.sie_block->gg14, &vcpu->arch.guest_gprs[14], 16);
@ -430,6 +432,9 @@ static void __vcpu_run(struct kvm_vcpu *vcpu)
if (need_resched())
schedule();
if (test_thread_flag(TIF_MCCK_PENDING))
s390_handle_mcck();
vcpu->arch.sie_block->icptcode = 0;
local_irq_disable();
kvm_guest_enter();

1
drivers/s390/s390mach.c
View File

@ -207,6 +207,7 @@ s390_handle_mcck(void)
do_exit(SIGSEGV);
}
}
EXPORT_SYMBOL_GPL(s390_handle_mcck);
/*
* returns 0 if all registers could be validated