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hypervisor: Add support to bringup AP threads for SEV-SNP guest

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As part SMP bringup for a SEV-SNP guest, BSP sets up the VMSA page for
each AP threads and informs hypervisor about the same using a VMGEXIT.
Thus, extend the current GHCB interface to handle this scenario.

Signed-off-by: Jinank Jain <jinankjain@microsoft.com>
This commit is contained in:
Jinank Jain 2023-11-10 07:33:34 +00:00 committed by Bo Chen
parent d7d6054b8c
commit 84b643f80b
1 changed files with 27 additions and 0 deletions
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27
hypervisor/src/mshv/mod.rs
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@ -1004,6 +1004,33 @@ impl cpu::Vcpu for MshvVcpu {
.gpa_write(&mut swei2_rw_gpa_arg)
.map_err(|e| cpu::HypervisorCpuError::GpaWrite(e.into()))?;
}
SVM_EXITCODE_SNP_AP_CREATION => {
let vmsa_gpa =
info.__bindgen_anon_2.__bindgen_anon_1.sw_exit_info2;
let apic_id =
info.__bindgen_anon_2.__bindgen_anon_1.sw_exit_info1 >> 32;
debug!(
"SNP AP CREATE REQUEST with VMSA GPA {:0x}, and APIC ID {:?}",
vmsa_gpa, apic_id
);
let mshv_ap_create_req = mshv_sev_snp_ap_create {
vp_id: apic_id,
vmsa_gpa,
};
self.vm_fd
.sev_snp_ap_create(&mshv_ap_create_req)
.map_err(|e| cpu::HypervisorCpuError::RunVcpu(e.into()))?;
let mut swei2_rw_gpa_arg = mshv_bindings::mshv_read_write_gpa {
base_gpa: ghcb_gpa + GHCB_SW_EXITINFO2_OFFSET,
byte_count: std::mem::size_of::<u64>() as u32,
..Default::default()
};
self.fd
.gpa_write(&mut swei2_rw_gpa_arg)
.map_err(|e| cpu::HypervisorCpuError::GpaWrite(e.into()))?;
}
_ => panic!(
"GHCB_INFO_NORMAL: Unhandled exit code: {:0x}",
exit_code