[PULL 04/19] sev/i386: Require in-kernel irqchip support for SEV-ES guests

[Paolo Bonzini <pbonzini@redhat.com>]

From: Tom Lendacky <thomas.lendacky@amd.com>

In prep for AP booting, require the use of in-kernel irqchip support. This
lessens the Qemu support burden required to boot APs.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <richard.henderson@linaro.org>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Reviewed-by: Venu Busireddy <venu.busireddy@oracle.com>
Message-Id: <e9aec5941e613456f0757f5a73869cdc5deea105.1611682609.git.thomas.lendacky@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 target/i386/sev.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/target/i386/sev.c b/target/i386/sev.c
index dc0e53019b..35b9259bfc 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -753,6 +753,12 @@ int sev_kvm_init(ConfidentialGuestSupport *cgs, Error **errp)
     sev->api_minor = status.api_minor;
 
     if (sev_es_enabled()) {
+        if (!kvm_kernel_irqchip_allowed()) {
+            error_report("%s: SEV-ES guests require in-kernel irqchip support",
+                         __func__);
+            goto err;
+        }
+
         if (!(status.flags & SEV_STATUS_FLAGS_CONFIG_ES)) {
             error_report("%s: guest policy requires SEV-ES, but "
                          "host SEV-ES support unavailable",
-- 
2.29.2