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KVM: s390: Provide access to program parameter
commit d208c79d63
(KVM: s390: Enable
the LPP facility for guests) enabled the LPP instruction for guests.
We should expose the program parameter as a pseudo register for
migration/reset etc. Lets also reset this value on initial CPU
reset.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Jason J. Herne <jjherne@linux.vnet.ibm.com>
This commit is contained in:
parent
684851a157
commit
672550fb68
3 changed files with 13 additions and 1 deletions
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@ -107,7 +107,9 @@ struct kvm_s390_sie_block {
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__u64 gbea; /* 0x0180 */
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__u8 reserved188[24]; /* 0x0188 */
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__u32 fac; /* 0x01a0 */
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__u8 reserved1a4[68]; /* 0x01a4 */
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__u8 reserved1a4[58]; /* 0x01a4 */
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__u64 pp; /* 0x01de */
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__u8 reserved1e6[2]; /* 0x01e6 */
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__u64 itdba; /* 0x01e8 */
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__u8 reserved1f0[16]; /* 0x01f0 */
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} __attribute__((packed));
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@ -76,4 +76,5 @@ struct kvm_sync_regs {
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#define KVM_REG_S390_PFTOKEN (KVM_REG_S390 | KVM_REG_SIZE_U64 | 0x5)
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#define KVM_REG_S390_PFCOMPARE (KVM_REG_S390 | KVM_REG_SIZE_U64 | 0x6)
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#define KVM_REG_S390_PFSELECT (KVM_REG_S390 | KVM_REG_SIZE_U64 | 0x7)
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#define KVM_REG_S390_PP (KVM_REG_S390 | KVM_REG_SIZE_U64 | 0x8)
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#endif
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@ -386,6 +386,7 @@ static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu)
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vcpu->arch.guest_fpregs.fpc = 0;
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asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc));
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vcpu->arch.sie_block->gbea = 1;
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vcpu->arch.sie_block->pp = 0;
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vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID;
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kvm_clear_async_pf_completion_queue(vcpu);
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atomic_set_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags);
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@ -571,6 +572,10 @@ static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu,
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r = put_user(vcpu->arch.pfault_select,
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(u64 __user *)reg->addr);
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break;
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case KVM_REG_S390_PP:
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r = put_user(vcpu->arch.sie_block->pp,
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(u64 __user *)reg->addr);
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break;
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default:
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break;
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}
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@ -612,6 +617,10 @@ static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu,
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r = get_user(vcpu->arch.pfault_select,
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(u64 __user *)reg->addr);
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break;
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case KVM_REG_S390_PP:
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r = get_user(vcpu->arch.sie_block->pp,
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(u64 __user *)reg->addr);
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break;
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default:
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break;
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}
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