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-ehabk...@redhat.com/ Signed-off-by: Eduardo Habkost <ehabk...@redhat.com> Message-Id: <20181210180250.31299-1-ehabk...@redhat.com> Signed-off-by: Eduardo Habkost <ehabk...@redhat.com> --- target/i386/cpu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 86a934d450..12f559b6af 100644 --- 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 = { -- 2.18.0.rc1.1.g3f1ff2140
