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KVM: s390: some ext irqs have to clear the ext cpu addr

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The cpu address of a source cpu (responsible for an external irq) is only to
be stored if bit 6 of the ext irq code is set.

If bit 6 is not set, it is to be zeroed out.

The special external irq code used for virtio and pfault uses the cpu addr as a
parameter field. As bit 6 is set, this implementation is correct.

Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
David Hildenbrand 2014-12-01 12:02:44 +01:00 committed by Christian Borntraeger
parent be06b6bece
commit 467fc29892
1 changed files with 3 additions and 0 deletions
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3
arch/s390/kvm/interrupt.c
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@ -281,6 +281,7 @@ static int __must_check __deliver_cpu_timer(struct kvm_vcpu *vcpu)
rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER,
(u16 *)__LC_EXT_INT_CODE);
rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
&vcpu->arch.sie_block->gpsw, sizeof(psw_t));
rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
@ -299,6 +300,7 @@ static int __must_check __deliver_ckc(struct kvm_vcpu *vcpu)
rc = put_guest_lc(vcpu, EXT_IRQ_CLK_COMP,
(u16 __user *)__LC_EXT_INT_CODE);
rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
&vcpu->arch.sie_block->gpsw, sizeof(psw_t));
rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
@ -585,6 +587,7 @@ static int __must_check __deliver_service(struct kvm_vcpu *vcpu,
inti->ext.ext_params, 0);
rc = put_guest_lc(vcpu, EXT_IRQ_SERVICE_SIG, (u16 *)__LC_EXT_INT_CODE);
rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
&vcpu->arch.sie_block->gpsw, sizeof(psw_t));
rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,