KVM: SEV: set SNP AP as runnable on VPML run request#19
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00xc wants to merge 1 commit intococonut-svsm:svsm-planes-v6.17from
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KVM: SEV: set SNP AP as runnable on VPML run request#1900xc wants to merge 1 commit intococonut-svsm:svsm-planes-v6.17from
00xc wants to merge 1 commit intococonut-svsm:svsm-planes-v6.17from
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Set snp_ap_runnable to true on a VMPL run request. This is needed because the destination vCPU may not have been run before, meaning that it will have a pending KVM_REQ_UPDATE_PROTECTED_GUEST_STATE request. This request will be honored by vcpu_enter_guest(), resetting the vCPU, and setting its mp_state in sev_snp_init_protected_guest_state() to KVM_MP_STATE_UNINITIALIZED, unless snp_ap_runnable is set to true. This results in the vCPU being infinitely stuck in the main loop in vcpu_run(), as KVM will wait until an external signal sets the vCPU to a runnable state. Fixes: 4534503 ("kvm/amd: Treat SEV_SNP_RUN_VMPL as INIT-SIPI") Signed-off-by: Carlos López <clopez@suse.de>
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Set
snp_ap_runnableto true on a VMPL run request. This is needed because the destination vCPU may not have been run before, meaning that it will have a pendingKVM_REQ_UPDATE_PROTECTED_GUEST_STATErequest. This request will be honored byvcpu_enter_guest(), resetting the vCPU, and setting itsmp_stateinsev_snp_init_protected_guest_state()toKVM_MP_STATE_UNINITIALIZED, unlesssnp_ap_runnableis set to true.This results in the vCPU being infinitely stuck in the main loop in
vcpu_run(), as KVM will wait until an external signal sets the vCPU to a runnable state.Fixes: 4534503 ("kvm/amd: Treat SEV_SNP_RUN_VMPL as INIT-SIPI")