target/i386/kvm: Restrict SEV stubs to x86 architecture

SEV is x86-specific, no need to add its stub to other
architectures. Move the stub file to target/i386/kvm/.

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20211007161716.453984-5-philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

2 files changed, 24 insertions, 0 deletions

diff --git a/target/i386/kvm/meson.build b/target/i386/kvm/meson.build
index b1c76957c7..736df8b72e 100644
--- a/target/i386/kvm/meson.build
+++ b/target/i386/kvm/meson.build
@@ -7,6 +7,8 @@ i386_softmmu_kvm_ss.add(files(
   'kvm-cpu.c',
 ))
 
+i386_softmmu_kvm_ss.add(when: 'CONFIG_SEV', if_false: files('sev-stub.c'))
+
 i386_softmmu_ss.add(when: 'CONFIG_HYPERV', if_true: files('hyperv.c'), if_false: files('hyperv-stub.c'))
 
 i386_softmmu_ss.add_all(when: 'CONFIG_KVM', if_true: i386_softmmu_kvm_ss)
diff --git a/target/i386/kvm/sev-stub.c b/target/i386/kvm/sev-stub.c
new file mode 100644
index 0000000000..9587d1b2a3
--- /dev/null
+++ b/target/i386/kvm/sev-stub.c
@@ -0,0 +1,22 @@
+/*
+ * QEMU SEV stub
+ *
+ * Copyright Advanced Micro Devices 2018
+ *
+ * Authors:
+ *      Brijesh Singh <brijesh.singh@amd.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "qemu-common.h"
+#include "sysemu/sev.h"
+
+int sev_kvm_init(ConfidentialGuestSupport *cgs, Error **errp)
+{
+    /* If we get here, cgs must be some non-SEV thing */
+    return 0;
+}