Populate selected PEBS feature names in FEAT_PERF_CAPABILITIES to make the corresponding bits user-visible CPU feature knobs, allowing them to be explicitly enabled or disabled via -cpu +/-<feature>.
Once named, these bits become part of the guest CPU configuration contract. If a VM is configured with such a feature enabled, migration to a destination that does not support the feature may fail, as the destination cannot honor the guest-visible CPU model. The PEBS_FMT bits are intentionally not exposed. They are not meaningful as user-visible features, and QEMU registers CPU features as boolean QOM properties, which makes them unsuitable for representing and checking numeric capabilities. Co-developed-by: Dapeng Mi <[email protected]> Signed-off-by: Dapeng Mi <[email protected]> Signed-off-by: Zide Chen <[email protected]> --- target/i386/cpu.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index f1ac98970d3e..fc6a64287415 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -1618,10 +1618,10 @@ FeatureWordInfo feature_word_info[FEATURE_WORDS] = { .type = MSR_FEATURE_WORD, .feat_names = { NULL, NULL, NULL, NULL, + NULL, NULL, "pebs-trap", "pebs-arch-reg" NULL, NULL, NULL, NULL, - NULL, NULL, NULL, NULL, - NULL, "full-width-write", NULL, NULL, - NULL, NULL, NULL, NULL, + NULL, "full-width-write", "pebs-baseline", NULL, + NULL, "pebs-timing-info", NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, -- 2.52.0
