Re: [libvirt PATCH] qemu_validate: Allow kvm hint-dedicated on non-passthrough VMs

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On a Monday in 2021, Tim Wiederhake wrote:
A VM defined similar to:
 ...
 <features><kvm><hint-dedicated state='on'/></kvm></features>
 <cpu mode="host-model"/>
 ...
is currently invalid, as hint-dedicated is only allowed if cpu mode
is host-passthrough. This restriction is unnecessary, see

https://bugzilla.redhat.com/show_bug.cgi?id=1857671.


Please drop the period at the end of the bug link, for easier selection.

Signed-off-by: Tim Wiederhake <twiederh@xxxxxxxxxx>
---
src/qemu/qemu_validate.c | 11 +----------
1 file changed, 1 insertion(+), 10 deletions(-)

diff --git a/src/qemu/qemu_validate.c b/src/qemu/qemu_validate.c
index a060bd98ba..c58d221cf8 100644
--- a/src/qemu/qemu_validate.c
+++ b/src/qemu/qemu_validate.c
@@ -253,16 +253,6 @@ qemuValidateDomainDefFeatures(const virDomainDef *def,
            }
            break;

-        case VIR_DOMAIN_FEATURE_KVM:
-            if (def->kvm_features[VIR_DOMAIN_KVM_DEDICATED] == VIR_TRISTATE_SWITCH_ON &&
-                (!def->cpu || def->cpu->mode != VIR_CPU_MODE_HOST_PASSTHROUGH)) {
-                virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
-                               _("kvm-hint-dedicated=on is only applicable "
-                                 "for cpu host-passthrough"));

I see that as of
commit c32f172d123c3cbe44214571c1d9118807608ec5
    qemu: wire up support for maximum CPU model

VIR_CPU_MODE_MAXIMUM is also exempted because it behaves like -cpu host,
which makes the commit message outdated.

Would you like to rebase and resend, or can I push it with the commit
message amended?

Jano


-                return -1;
-            }
-            break;
-
        case VIR_DOMAIN_FEATURE_VMPORT:
            if (def->features[i] != VIR_TRISTATE_SWITCH_ABSENT &&
                !virQEMUCapsSupportsVmport(qemuCaps, def)) {
@@ -335,6 +325,7 @@ qemuValidateDomainDefFeatures(const virDomainDef *def,
            }
            break;

+        case VIR_DOMAIN_FEATURE_KVM:
        case VIR_DOMAIN_FEATURE_XEN:
        case VIR_DOMAIN_FEATURE_ACPI:
        case VIR_DOMAIN_FEATURE_PAE:
--
2.26.2

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