system/linux
system/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux synced 2024-09-20 11:07:02 +00:00
Code Issues Packages Projects Releases Wiki Activity

KVM: s390: don't use CPUSTAT_WAIT to detect if a VCPU is idle

Browse source 
As we want to make use of CPUSTAT_WAIT also when a VCPU is not idle but
to force interception of external calls, let's check in the bitmap instead.

Acked-by: Christian Borntraeger <borntraeger@de.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 2016-02-18 10:15:43 +01:00 committed by Christian Borntraeger
parent adbf16985c
commit 94a15de8fb
2 changed files with 6 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
arch/s390/kvm/kvm-s390.h
View file

@ -56,7 +56,7 @@ static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu)
static inline int is_vcpu_idle(struct kvm_vcpu *vcpu)
{
return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_WAIT;
return test_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
}
static inline int kvm_is_ucontrol(struct kvm *kvm)

10
arch/s390/kvm/sigp.c
View file

@ -77,18 +77,18 @@ static int __sigp_conditional_emergency(struct kvm_vcpu *vcpu,
const u64 psw_int_mask = PSW_MASK_IO | PSW_MASK_EXT;
u16 p_asn, s_asn;
psw_t *psw;
u32 flags;
bool idle;
flags = atomic_read(&dst_vcpu->arch.sie_block->cpuflags);
idle = is_vcpu_idle(vcpu);
psw = &dst_vcpu->arch.sie_block->gpsw;
p_asn = dst_vcpu->arch.sie_block->gcr[4] & 0xffff; /* Primary ASN */
s_asn = dst_vcpu->arch.sie_block->gcr[3] & 0xffff; /* Secondary ASN */
/* Inject the emergency signal? */
if (!(flags & CPUSTAT_STOPPED)
if (!is_vcpu_stopped(vcpu)
|| (psw->mask & psw_int_mask) != psw_int_mask
|| ((flags & CPUSTAT_WAIT) && psw->addr != 0)
|| (!(flags & CPUSTAT_WAIT) && (asn == p_asn || asn == s_asn))) {
|| (idle && psw->addr != 0)
|| (!idle && (asn == p_asn || asn == s_asn))) {
return __inject_sigp_emergency(vcpu, dst_vcpu);
} else {
*reg &= 0xffffffff00000000UL;