From 9fb4f5f5a1fd7619e221fd5068003c5b491b2bf0 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Sat, 17 Jun 2023 01:13:34 +0200 Subject: [PATCH] target/i386: ignore ARCH_CAPABILITIES features in user mode emulation ARCH_CAPABILITIES is only accessible through a read-only MSR, so it has no impact on any user-mode operation (user-mode cannot read the MSR). So do not bother printing warnings about it in user mode emulation. Signed-off-by: Paolo Bonzini --- target/i386/cpu.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index b96a609d96..328779874f 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -1069,6 +1069,13 @@ FeatureWordInfo feature_word_info[FEATURE_WORDS] = { .msr = { .index = MSR_IA32_ARCH_CAPABILITIES, }, + /* + * FEAT_ARCH_CAPABILITIES only affects a read-only MSR, which + * cannot be read from user mode. Therefore, it has no impact + > on any user-mode operation, and warnings about unsupported + * features do not matter. + */ + .tcg_features = ~0U, }, [FEAT_CORE_CAPABILITY] = { .type = MSR_FEATURE_WORD,