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Merge tag 'kvm-s390-master-6.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD

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One small fix for gisa to avoid stalls.
This commit is contained in:
Paolo Bonzini 2023-10-12 11:05:50 -04:00
commit 4bcd9bc629
1 changed files with 6 additions and 10 deletions
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16
arch/s390/kvm/interrupt.c
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@ -303,11 +303,6 @@ static inline u8 gisa_get_ipm_or_restore_iam(struct kvm_s390_gisa_interrupt *gi)
return 0;
}
static inline int gisa_in_alert_list(struct kvm_s390_gisa *gisa)
{
return READ_ONCE(gisa->next_alert) != (u32)virt_to_phys(gisa);
}
static inline void gisa_set_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gisc)
{
set_bit_inv(IPM_BIT_OFFSET + gisc, (unsigned long *) gisa);
@ -3216,11 +3211,12 @@ void kvm_s390_gisa_destroy(struct kvm *kvm)
if (!gi->origin)
return;
if (gi->alert.mask)
KVM_EVENT(3, "vm 0x%pK has unexpected iam 0x%02x",
kvm, gi->alert.mask);
while (gisa_in_alert_list(gi->origin))
cpu_relax();
WARN(gi->alert.mask != 0x00,
"unexpected non zero alert.mask 0x%02x",
gi->alert.mask);
gi->alert.mask = 0x00;
if (gisa_set_iam(gi->origin, gi->alert.mask))
process_gib_alert_list();
hrtimer_cancel(&gi->timer);
gi->origin = NULL;
VM_EVENT(kvm, 3, "gisa 0x%pK destroyed", gisa);