i386: Add "stibp" flag name

The STIBP flag may be supported by the host KVM module, so QEMU
can allow it to be configured manually, and it can be exposed to
guests when using "-cpu host".

No additional migration code is required because the whole
contents of spec_ctrl is already migrated in the "cpu/spec_ctrl"
section.

Corresponding KVM patch was submitted at:
https://lore.kernel.org/lkml/20181205191956.31480-1-ehabkost@redhat.com/

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20181210180250.31299-1-ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 86a934d450cb8552e6f1eaf9b8b7dc54394cf36a..12f559b6af9be47816dc4c1954958ddb851d1f6a 100644 (file)
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -1042,7 +1042,7 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
             NULL, NULL, NULL, NULL,
             NULL, NULL, "pconfig", NULL,
             NULL, NULL, NULL, NULL,
-            NULL, NULL, "spec-ctrl", NULL,
+            NULL, NULL, "spec-ctrl", "stibp",
             NULL, "arch-capabilities", NULL, "ssbd",
         },
         .cpuid = {