mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-20 17:41:09 +00:00
Code Issues Releases Wiki Activity

KVM: s390: vsie: support shared IPTE-interlock facility

Browse source 
As we forward the whole SCA provided by guest 2, we can directly forward
SIIF if available.

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 2015-11-25 09:59:49 +01:00 committed by Christian Borntraeger
parent 19c439b564
commit 0615a326e0
3 changed files with 5 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
arch/s390/include/uapi/asm/kvm.h
View file

@ -100,6 +100,7 @@ struct kvm_s390_vm_cpu_machine {
#define KVM_S390_VM_CPU_FEAT_ESOP 0 #define KVM_S390_VM_CPU_FEAT_ESOP 0
#define KVM_S390_VM_CPU_FEAT_SIEF2 1 #define KVM_S390_VM_CPU_FEAT_SIEF2 1
#define KVM_S390_VM_CPU_FEAT_64BSCAO 2 #define KVM_S390_VM_CPU_FEAT_64BSCAO 2
#define KVM_S390_VM_CPU_FEAT_SIIF 3
struct kvm_s390_vm_cpu_feat { struct kvm_s390_vm_cpu_feat {
__u64 feat[16]; __u64 feat[16];
}; };

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

@ -267,6 +267,8 @@ static void kvm_s390_cpu_feat_init(void)
allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIEF2); allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIEF2);
if (sclp.has_64bscao) if (sclp.has_64bscao)
allow_cpu_feat(KVM_S390_VM_CPU_FEAT_64BSCAO); allow_cpu_feat(KVM_S390_VM_CPU_FEAT_64BSCAO);
if (sclp.has_siif)
allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIIF);
} }
int kvm_arch_init(void *opaque) int kvm_arch_init(void *opaque)

2
arch/s390/kvm/vsie.c
View file

@ -315,6 +315,8 @@ static int shadow_scb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
/* Run-time-Instrumentation */ /* Run-time-Instrumentation */
if (test_kvm_facility(vcpu->kvm, 64)) if (test_kvm_facility(vcpu->kvm, 64))
scb_s->ecb3 |= scb_o->ecb3 & 0x01U; scb_s->ecb3 |= scb_o->ecb3 & 0x01U;
if (test_kvm_cpu_feat(vcpu->kvm, KVM_S390_VM_CPU_FEAT_SIIF))
scb_s->eca |= scb_o->eca & 0x00000001U;
prepare_ibc(vcpu, vsie_page); prepare_ibc(vcpu, vsie_page);
rc = shadow_crycb(vcpu, vsie_page); rc = shadow_crycb(vcpu, vsie_page);