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X-CSE-ConnectionGUID: OhgEQuFCRi6nRwQhRqPmYg== X-CSE-MsgGUID: AYOw0KnjQqmbYcdciNSoTQ== X-IronPort-AV: E=McAfee;i="6800,10657,11771"; a="89538268" X-IronPort-AV: E=Sophos;i="6.23,207,1770624000"; d="scan'208";a="89538268" Received: from orviesa006.jf.intel.com ([10.64.159.146]) by orvoesa105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Apr 2026 16:14:26 -0700 X-CSE-ConnectionGUID: NdJ168auSk+wms8vdhuChg== X-CSE-MsgGUID: UyoUmC+OTnSrcrhtwQ5vFg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,207,1770624000"; d="scan'208";a="233364165" Received: from sghuge-mobl2.amr.corp.intel.com (HELO [10.125.109.40]) ([10.125.109.40]) by orviesa006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Apr 2026 16:14:25 -0700 Message-ID: <1a1b0f7c-aa3f-4758-8e17-bc2176c52952@intel.com> Date: Wed, 29 Apr 2026 16:14:26 -0700 Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/2] x86/cpu: Skip reading MSR_IA32_PLATFORM_ID in virtualized environment To: Binbin Wu , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, x86@kernel.org Cc: pbonzini@redhat.com, seanjc@google.com, kas@kernel.org, rick.p.edgecombe@intel.com, vishal.l.verma@intel.com, xiaoyao.li@intel.com, chao.gao@intel.com References: <20260428024746.1040531-1-binbin.wu@linux.intel.com> <20260428024746.1040531-3-binbin.wu@linux.intel.com> Content-Language: en-US From: Dave Hansen Autocrypt: addr=dave.hansen@intel.com; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 4/27/26 19:47, Binbin Wu wrote: > +static inline bool x86_cpuid_has_hypervisor(void) > +{ > + return native_cpuid_ecx(1) & BIT(31); > +} Could you please put X86_FEATURE_HYPERVISOR in here somewhere? Even if it's just (logically): return native_cpuid_ecx(1) & (X86_FEATURE_HYPERVISOR & 0x1f);