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i386/tdx: Set and check kernel_irqchip mode for TDX

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KVM mandates kernel_irqchip to be split mode.

Set it to split mode automatically when users don't provide an explicit
value, otherwise check it to be the split mode.

Suggested-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Link: https://lore.kernel.org/r/20250508150002.689633-39-xiaoyao.li@intel.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Xiaoyao Li 2025-05-08 10:59:44 -04:00 • committed by Paolo Bonzini
parent e7ef60892c
commit bb45580d84
1 changed files with 8 additions and 0 deletions
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8
target/i386/kvm/tdx.c
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@ -16,6 +16,7 @@
#include "qapi/error.h"
#include "qom/object_interfaces.h"
#include "crypto/hash.h"
#include "system/kvm_int.h"
#include "system/runstate.h"
#include "system/system.h"
#include "system/ramblock.h"
@ -388,6 +389,13 @@ static int tdx_kvm_init(ConfidentialGuestSupport *cgs, Error **errp)
return -EINVAL;
}
if (kvm_state->kernel_irqchip_split == ON_OFF_AUTO_AUTO) {
kvm_state->kernel_irqchip_split = ON_OFF_AUTO_ON;
} else if (kvm_state->kernel_irqchip_split != ON_OFF_AUTO_ON) {
error_setg(errp, "TDX VM requires kernel_irqchip to be split");
return -EINVAL;
}
if (!tdx_caps) {
r = get_tdx_capabilities(errp);
if (r) {