Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=71cde5...
Commit: 71cde5879f10b639506bc0b9f29a89f58b42a17e
Parent: 74b6b522ec83f9c44fc7743f2adcb24664aa8f45
Author: Christian Borntraeger <borntraeger@de.ibm.com>
AuthorDate: Wed May 21 13:37:34 2008 +0200
Committer: Avi Kivity <avi@qumranet.com>
CommitDate: Fri Jun 6 21:08:26 2008 +0300
KVM: s390: handle machine checks when guest is running
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>
---
arch/s390/kvm/kvm-s390.c | 5 +++++
drivers/s390/s390mach.c | 1 +
2 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 0ac36a6..40e4f2d 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -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();
diff --git a/drivers/s390/s390mach.c b/drivers/s390/s390mach.c
index 5080f34..5bfbe76 100644
--- a/drivers/s390/s390mach.c
+++ b/drivers/s390/s390mach.c
@@ -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
--
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