From: Randy Dunlap <rdunlap@infradead.org>
To: Xin Li <xin@zytor.com>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Andy Lutomirski <luto@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Peter Zijlstra <peterz@infradead.org>,
Ard Biesheuvel <ardb@kernel.org>,
"Paul E. McKenney" <paulmck@kernel.org>,
Josh Poimboeuf <jpoimboe@kernel.org>,
Xiongwei Song <xiongwei.song@windriver.com>,
Xin Li <xin3.li@intel.com>,
"Mike Rapoport (IBM)" <rppt@kernel.org>,
Brijesh Singh <brijesh.singh@amd.com>,
Michael Roth <michael.roth@amd.com>,
Tony Luck <tony.luck@intel.com>,
Alexey Kardashevskiy <aik@amd.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jonathan Corbet <corbet@lwn.net>,
Sohil Mehta <sohil.mehta@intel.com>,
Ingo Molnar <mingo@kernel.org>,
Pawan Gupta <pawan.kumar.gupta@linux.intel.com>,
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Kai Huang <kai.huang@intel.com>,
Sandipan Das <sandipan.das@amd.com>,
Breno Leitao <leitao@debian.org>,
Rick Edgecombe <rick.p.edgecombe@intel.com>,
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Juergen Gross <jgross@suse.com>,
Vegard Nossum <vegard.nossum@oracle.com>,
Kees Cook <kees@kernel.org>, Eric Biggers <ebiggers@google.com>,
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"Masami Hiramatsu (Google)" <mhiramat@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
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Yuntao Wang <ytcoode@gmail.com>,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
Christophe Leroy <christophe.leroy@csgroup.eu>,
Tejun Heo <tj@kernel.org>, Changbin Du <changbin.du@huawei.com>,
Huang Shijie <shijie@os.amperecomputing.com>,
Geert Uytterhoeven <geert+renesas@glider.be>,
Namhyung Kim <namhyung@kernel.org>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-efi@vger.kernel.org, linux-mm@kvack.org,
Yian Chen <yian.chen@intel.com>
Subject: Re: [PATCHv6 01/16] x86/cpu: Enumerate the LASS feature bits
Date: Fri, 20 Jun 2025 09:16:13 -0700 [thread overview]
Message-ID: <756e93a2-7e42-4323-ae21-a5437e71148e@infradead.org> (raw)
In-Reply-To: <98703493-109a-4795-8abd-6cfe10b941f4@zytor.com>
On 6/20/25 9:12 AM, Xin Li wrote:
> On 6/20/2025 9:02 AM, Randy Dunlap wrote:
>>> +config X86_DISABLED_FEATURE_LASS
>>> + def_bool y
>>> + depends on !X86_64
>> Please explain why this is !X86_64.
>
> When NOT on X86_64, the LASS code should not be compiled.
Ah yes, the double negative caught me.
> But first of all, as I replied earlier, X86_DISABLED_FEATURE_LASS is
> completely not needed.
That's good.
Thanks.
--
~Randy
next prev parent reply other threads:[~2025-06-20 16:16 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20250620135325.3300848-1-kirill.shutemov@linux.intel.com>
[not found] ` <20250620135325.3300848-9-kirill.shutemov@linux.intel.com>
2025-06-20 14:47 ` [PATCHv6 08/16] x86/traps: Consolidate user fixups in exc_general_protection() Dave Hansen
[not found] ` <20250620135325.3300848-14-kirill.shutemov@linux.intel.com>
2025-06-20 15:20 ` [PATCHv6 13/16] x86/traps: Handle LASS thrown #SS Xin Li
2025-06-20 17:53 ` Kirill A. Shutemov
[not found] ` <20250620135325.3300848-4-kirill.shutemov@linux.intel.com>
2025-06-20 15:33 ` [PATCHv6 03/16] x86/alternatives: Disable LASS when patching kernel alternatives Dave Hansen
2025-06-20 17:18 ` Kirill A. Shutemov
[not found] ` <20250620135325.3300848-5-kirill.shutemov@linux.intel.com>
2025-06-20 15:35 ` [PATCHv6 04/16] x86/efi: Move runtime service initialization to arch/x86 Dave Hansen
2025-06-20 17:42 ` Kirill A. Shutemov
2025-06-20 15:38 ` [PATCHv6 00/16] x86: Enable Linear Address Space Separation support Dave Hansen
2025-06-20 22:04 ` Andrew Cooper
2025-06-20 22:29 ` H. Peter Anvin
2025-06-20 22:43 ` H. Peter Anvin
2025-06-20 22:46 ` Dave Hansen
[not found] ` <20250620135325.3300848-6-kirill.shutemov@linux.intel.com>
2025-06-20 15:44 ` [PATCHv6 05/16] x86/cpu: Defer CR pinning setup until after EFI initialization Dave Hansen
[not found] ` <20250620135325.3300848-7-kirill.shutemov@linux.intel.com>
2025-06-20 15:55 ` [PATCHv6 06/16] efi: Disable LASS around set_virtual_address_map() EFI call Dave Hansen
2025-06-20 17:50 ` Kirill A. Shutemov
[not found] ` <20250620135325.3300848-2-kirill.shutemov@linux.intel.com>
2025-06-20 15:25 ` [PATCHv6 01/16] x86/cpu: Enumerate the LASS feature bits Dave Hansen
2025-06-20 15:36 ` Xin Li
2025-06-20 17:31 ` Kirill A. Shutemov
2025-06-20 23:46 ` Xin Li
2025-06-21 0:45 ` H. Peter Anvin
2025-06-21 0:50 ` H. Peter Anvin
2025-06-23 17:40 ` Xin Li
2025-06-24 2:04 ` H. Peter Anvin
2025-06-24 4:57 ` Xin Li
2025-06-24 5:11 ` Xin Li
2025-06-20 16:02 ` Randy Dunlap
2025-06-20 16:12 ` Xin Li
2025-06-20 16:16 ` Randy Dunlap [this message]
2025-06-20 16:35 ` Borislav Petkov
2025-06-20 17:33 ` Kirill A. Shutemov
2025-06-20 18:29 ` Borislav Petkov
2025-06-23 8:17 ` Kirill A. Shutemov
2025-06-23 10:21 ` Borislav Petkov
2025-06-23 13:42 ` Kirill A. Shutemov
2025-06-26 15:18 ` Borislav Petkov
2025-06-26 16:07 ` Borislav Petkov
2025-06-26 17:21 ` Dave Hansen
2025-06-27 10:25 ` Kirill A. Shutemov
2025-06-27 10:43 ` Borislav Petkov
2025-06-27 13:57 ` Dave Hansen
2025-06-20 18:14 ` Sohil Mehta
2025-06-20 18:24 ` Dave Hansen
2025-06-20 23:10 ` Sohil Mehta
2025-06-23 16:25 ` Luck, Tony
2025-06-23 16:42 ` Dave Hansen
2025-06-23 23:13 ` Luck, Tony
2025-06-23 23:36 ` H. Peter Anvin
2025-06-24 0:10 ` Luck, Tony
2025-06-24 2:03 ` H. Peter Anvin
2025-06-25 18:51 ` H. Peter Anvin
[not found] ` <20250620135325.3300848-8-kirill.shutemov@linux.intel.com>
2025-06-20 18:43 ` [PATCHv6 07/16] x86/vsyscall: Reorganize the #PF emulation code Dave Hansen
2025-06-20 23:08 ` Andrew Cooper
2025-06-20 23:18 ` Sohil Mehta
2025-06-20 23:29 ` Andrew Cooper
2025-06-20 23:21 ` Dave Hansen
2025-06-21 3:35 ` H. Peter Anvin
2025-06-23 12:41 ` Kirill A. Shutemov
2025-06-23 12:46 ` Andrew Cooper
2025-06-23 15:32 ` Dave Hansen
2025-06-23 15:45 ` Andrew Cooper
2025-06-24 11:37 ` Kirill A. Shutemov
2025-06-24 14:11 ` Dave Hansen
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