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KVM: s390: Also reset registers in sync regs for initial cpu reset

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When we do the initial CPU reset we must not only clear the registers
in the internal data structures but also in kvm_run sync_regs. For
modern userspace sync_regs is the only place that it looks at.

Fixes: 7de3f1423f ("KVM: s390: Add new reset vcpu API")
Acked-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Christian Borntraeger 2020-03-03 03:10:57 -05:00
parent d718fdc3e7
commit e93fc7b454
1 changed files with 17 additions and 1 deletions
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18
arch/s390/kvm/kvm-s390.c
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@ -3268,7 +3268,10 @@ static void kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu)
/* Initial reset is a superset of the normal reset */
kvm_arch_vcpu_ioctl_normal_reset(vcpu);
/* this equals initial cpu reset in pop, but we don't switch to ESA */
/*
* This equals initial cpu reset in pop, but we don't switch to ESA.
* We do not only reset the internal data, but also ...
*/
vcpu->arch.sie_block->gpsw.mask = 0;
vcpu->arch.sie_block->gpsw.addr = 0;
kvm_s390_set_prefix(vcpu, 0);
@ -3278,6 +3281,19 @@ static void kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu)
memset(vcpu->arch.sie_block->gcr, 0, sizeof(vcpu->arch.sie_block->gcr));
vcpu->arch.sie_block->gcr[0] = CR0_INITIAL_MASK;
vcpu->arch.sie_block->gcr[14] = CR14_INITIAL_MASK;
/* ... the data in sync regs */
memset(vcpu->run->s.regs.crs, 0, sizeof(vcpu->run->s.regs.crs));
vcpu->run->s.regs.ckc = 0;
vcpu->run->s.regs.crs[0] = CR0_INITIAL_MASK;
vcpu->run->s.regs.crs[14] = CR14_INITIAL_MASK;
vcpu->run->psw_addr = 0;
vcpu->run->psw_mask = 0;
vcpu->run->s.regs.todpr = 0;
vcpu->run->s.regs.cputm = 0;
vcpu->run->s.regs.ckc = 0;
vcpu->run->s.regs.pp = 0;
vcpu->run->s.regs.gbea = 1;
vcpu->run->s.regs.fpc = 0;
vcpu->arch.sie_block->gbea = 1;
vcpu->arch.sie_block->pp = 0;