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KVM: s390: set host program identifier
A host program identifier (HPID) provides information regarding the underlying host environment. A level-2 (VM) guest will have an HPID denoting Linux/KVM, which is set during VCPU setup. A level-3 (VM on a VM) and beyond guest will have an HPID denoting KVM vSIE, which is set for all shadow control blocks, overriding the original value of the HPID. Signed-off-by: Collin Walling <walling@linux.ibm.com> Reviewed-by: Janosch Frank <frankja@linux.ibm.com> Message-Id: <1535734279-10204-4-git-send-email-walling@linux.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
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3 changed files with 9 additions and 1 deletions
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@ -237,7 +237,11 @@ struct kvm_s390_sie_block {
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psw_t gpsw; /* 0x0090 */
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__u64 gg14; /* 0x00a0 */
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__u64 gg15; /* 0x00a8 */
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__u8 reservedb0[20]; /* 0x00b0 */
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__u8 reservedb0[8]; /* 0x00b0 */
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#define HPID_KVM 0x4
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#define HPID_VSIE 0x5
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__u8 hpid; /* 0x00b8 */
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__u8 reservedb9[11]; /* 0x00b9 */
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__u16 extcpuaddr; /* 0x00c4 */
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__u16 eic; /* 0x00c6 */
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__u32 reservedc8; /* 0x00c8 */
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@ -2685,6 +2685,8 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
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hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
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vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup;
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vcpu->arch.sie_block->hpid = HPID_KVM;
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kvm_s390_vcpu_crypto_setup(vcpu);
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return rc;
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@ -383,6 +383,8 @@ static int shadow_scb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
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if (test_kvm_facility(vcpu->kvm, 156))
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scb_s->ecd |= scb_o->ecd & ECD_ETOKENF;
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scb_s->hpid = HPID_VSIE;
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prepare_ibc(vcpu, vsie_page);
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rc = shadow_crycb(vcpu, vsie_page);
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out:
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