From: Sohil Mehta <sohil.mehta@intel.com>
To: Ard Biesheuvel <ardb@kernel.org>, "H. Peter Anvin" <hpa@zytor.com>
Cc: <x86@kernel.org>, Dave Hansen <dave.hansen@linux.intel.com>,
"Thomas Gleixner" <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "Borislav Petkov" <bp@alien8.de>,
Andy Lutomirski <luto@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Kiryl Shutsemau <kas@kernel.org>,
Rick Edgecombe <rick.p.edgecombe@intel.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
"Tony Luck" <tony.luck@intel.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
<linux-kernel@vger.kernel.org>, <linux-efi@vger.kernel.org>
Subject: Re: [PATCH 0/3] x86: Extend LASS support to EFI configurations
Date: Fri, 12 Dec 2025 16:21:06 -0800 [thread overview]
Message-ID: <98ca1e1a-4bc7-4a6c-b587-b6c2a60db7bc@intel.com> (raw)
In-Reply-To: <CAMj1kXEQFhdZ4kcObsxNoj2cK+TGS=xBU83ARVrifxjw8yPcJQ@mail.gmail.com>
On 12/4/2025 11:58 AM, Ard Biesheuvel wrote:
> On Thu, 4 Dec 2025 at 20:51, H. Peter Anvin <hpa@zytor.com> wrote:
>>
>> But your underlying assumption is that disabling LASS around EFI
>> calls is a problem. It isn't, because the efi_mm has explicitly
>> unmapped any memory EFI isn't allowed to touch. In other words, we
>> are already doing the equivalent of LASS "manually."
>>
>
> I must have misunderstood then - there was some pushback on this
> IIRC but if en/disabling LASS is fine then sure.
Thanks for the feedback! I'll leave the patches as-is then and wait for
additional comments.
next prev parent reply other threads:[~2025-12-13 0:21 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-04 7:21 [PATCH 0/3] x86: Extend LASS support to EFI configurations Sohil Mehta
2025-12-04 7:21 ` [PATCH 1/3] x86/cpu: Defer LASS enabling until userspace comes up Sohil Mehta
2025-12-04 7:21 ` [PATCH 2/3] x86/efi: Make runtime services compatible with LASS Sohil Mehta
2025-12-04 7:21 ` [PATCH 3/3] x86/cpu: Remove LASS restriction on EFI Sohil Mehta
2025-12-04 12:47 ` [PATCH 0/3] x86: Extend LASS support to EFI configurations Ard Biesheuvel
2025-12-04 17:34 ` Sohil Mehta
2025-12-04 19:03 ` Ard Biesheuvel
2025-12-04 19:15 ` H. Peter Anvin
2025-12-04 19:40 ` Ard Biesheuvel
2025-12-04 19:51 ` H. Peter Anvin
2025-12-04 19:58 ` Ard Biesheuvel
2025-12-13 0:21 ` Sohil Mehta [this message]
2025-12-13 0:17 ` Sohil Mehta
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