Merge tag 'kvm-s390-master-5.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into kvm-master
KVM: s390: Fixes for 5.10
- do not reset the global diag318 data for per-cpu reset
- do not mark memory as protected too early
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 6b74b92..425d3d7 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -2312,7 +2312,7 @@ static int kvm_s390_handle_pv(struct kvm *kvm, struct kvm_pv_cmd *cmd)
struct kvm_s390_pv_unp unp = {};
r = -EINVAL;
- if (!kvm_s390_pv_is_protected(kvm))
+ if (!kvm_s390_pv_is_protected(kvm) || !mm_is_protected(kvm->mm))
break;
r = -EFAULT;
@@ -3564,7 +3564,6 @@ static void kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu)
vcpu->arch.sie_block->pp = 0;
vcpu->arch.sie_block->fpf &= ~FPF_BPBC;
vcpu->arch.sie_block->todpr = 0;
- vcpu->arch.sie_block->cpnc = 0;
}
}
@@ -3582,7 +3581,6 @@ static void kvm_arch_vcpu_ioctl_clear_reset(struct kvm_vcpu *vcpu)
regs->etoken = 0;
regs->etoken_extension = 0;
- regs->diag318 = 0;
}
int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
diff --git a/arch/s390/kvm/pv.c b/arch/s390/kvm/pv.c
index eb99e2f..f5847f9 100644
--- a/arch/s390/kvm/pv.c
+++ b/arch/s390/kvm/pv.c
@@ -208,7 +208,6 @@ int kvm_s390_pv_init_vm(struct kvm *kvm, u16 *rc, u16 *rrc)
return -EIO;
}
kvm->arch.gmap->guest_handle = uvcb.guest_handle;
- atomic_set(&kvm->mm->context.is_protected, 1);
return 0;
}
@@ -228,6 +227,8 @@ int kvm_s390_pv_set_sec_parms(struct kvm *kvm, void *hdr, u64 length, u16 *rc,
*rrc = uvcb.header.rrc;
KVM_UV_EVENT(kvm, 3, "PROTVIRT VM SET PARMS: rc %x rrc %x",
*rc, *rrc);
+ if (!cc)
+ atomic_set(&kvm->mm->context.is_protected, 1);
return cc ? -EINVAL : 0;
}
diff --git a/arch/s390/mm/gmap.c b/arch/s390/mm/gmap.c
index cfb0017..64795d0 100644
--- a/arch/s390/mm/gmap.c
+++ b/arch/s390/mm/gmap.c
@@ -2690,6 +2690,8 @@ static const struct mm_walk_ops reset_acc_walk_ops = {
#include <linux/sched/mm.h>
void s390_reset_acc(struct mm_struct *mm)
{
+ if (!mm_is_protected(mm))
+ return;
/*
* we might be called during
* reset: we walk the pages and clear
