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runtime: check kvm module sev correctly

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Runtime now accepts both `1` and `Y` as valid values for
kvm_amd module parameter kvm_amd.sev.

Fixes #3273

Signed-off-by: Pierre Kohler <pierre.kohler@cysec.systems>
This commit is contained in:
Pierre Kohler 2021-12-07 11:52:53 +01:00 committed by Samuel Ortiz
parent 88a70d32ba
commit 5ef522f7c3
1 changed files with 2 additions and 2 deletions
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4
src/runtime/virtcontainers/hypervisor_amd64.go
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@ -18,9 +18,9 @@ func availableGuestProtection() (guestProtection, error) {
if d, err := os.Stat(tdxSysFirmwareDir); (err == nil && d.IsDir()) || flags[tdxCPUFlag] {
return tdxProtection, nil
}
// SEV is supported and enabled when the kvm module `sev` parameter is set to `1`
// SEV is supported and enabled when the kvm module `sev` parameter is set to `1` (or `Y` for linux >= 5.12)
if _, err := os.Stat(sevKvmParameterPath); err == nil {
if c, err := os.ReadFile(sevKvmParameterPath); err == nil && len(c) > 0 && c[0] == '1' {
if c, err := os.ReadFile(sevKvmParameterPath); err == nil && len(c) > 0 && (c[0] == '1' || c[0] == 'Y') {
return sevProtection, nil
}
}