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Message-ID: <805fa8d2-c920-415c-8db5-f073607f9e6a@intel.com> Date: Mon, 17 Jun 2024 07:34:22 -0700 From: Dave Hansen <dave.hansen@...el.com> To: Andrew Cooper <andrew.cooper3@...rix.com>, Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org Cc: daniel.sneddon@...ux.intel.com, tony.luck@...el.com, linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org, linux-perf-users@...r.kernel.org, Josh Poimboeuf <jpoimboe@...nel.org>, Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>, "Rafael J. Wysocki" <rafael@...nel.org>, Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>, "Liang, Kan" <kan.liang@...ux.intel.com> Subject: Re: [PATCH PATCH 9/9] x86/rfds: Exclude P-only parts from the RFDS affected list On 6/17/24 02:43, Andrew Cooper wrote: > On 17/06/2024 10:12 am, Pawan Gupta wrote: >> + VULNBL_INTEL_CPU_TYPE (RAPTORLAKE, X86_CPU_TYPE_INTEL_ATOM, RFDS), >> + VULNBL_INTEL_CPU_TYPE (ALDERLAKE, X86_CPU_TYPE_INTEL_ATOM, RFDS), > > How does this work? > > Being __initconst, this is only evaluated on the BSP. > > P-only and mixed P/E systems won't see X86_CPU_TYPE_INTEL_ATOM, even if > there are ATOM APs to bring up later. The X86_CPU_TYPE_* is only used on the boot CPU on non-hybrids. Hybrids (independent of the boot CPU type) should be considered vulnerable no matter what.
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