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Merge tag 'kvm-s390-master-5.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into kvm-master

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KVM: s390: Fully do the CPU resets as intended

With 7de3f1423f ("KVM: s390: Add new reset vcpu API") we clarified
the meaning of the reset ioctl to fully reset the CPU and not only the
parts that can not be handled by userspace. Turns out that we missed
some parts.
This commit is contained in:
Paolo Bonzini
2020-03-14 11:59:08 +01:00
parent 0c22056f8c e93fc7b454
commit 997224fe66
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;