From: Peter Jones <pjones@redhat.com>
To: Evgeniy Baskov <baskov@ispras.ru>
Cc: Ard Biesheuvel <ardb@kernel.org>, Borislav Petkov <bp@alien8.de>,
Andy Lutomirski <luto@kernel.org>,
Dave Hansen <dave.hansen@linux.intel.com>,
Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Thomas Gleixner <tglx@linutronix.de>,
Alexey Khoroshilov <khoroshilov@ispras.ru>,
lvc-project@linuxtesting.org, x86@kernel.org,
linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-hardening@vger.kernel.org
Subject: Re: [PATCH 00/16] x86_64: Improvements at compressed kernel stage
Date: Tue, 18 Oct 2022 17:04:47 -0400 [thread overview]
Message-ID: <20221018210447.sg3tddaujre6orgc@redhat.com> (raw)
In-Reply-To: <cover.1662459668.git.baskov@ispras.ru>
On Tue, Sep 06, 2022 at 01:41:04PM +0300, Evgeniy Baskov wrote:
> This patchset is aimed
> * to improve UEFI compatibility of compressed kernel code for x86_64
> * to setup proper memory access attributes for code and rodata sections
> * to implement W^X protection policy throughout the whole execution
> of compressed kernel for EFISTUB code path.
Hi Evgeniy,
I've tested this set of patches with the Mu firmware that supports the W^X
feature and a modified bootloader to also support it, and also with an
existing firmware and the grub2 build in fedora 36. On the firmware
without W^X support, this all works for me. With W^X support, it works
so long as I use CONFIG_EFI_STUB_EXTRACT_DIRECT, though I still need
some changes in grub's loader. IMO that's a big step forward.
I can't currently make it work with W^X enabled but without direct
extraction, and I'm still investigating why not, but I figured I'd give
you a heads up.
--
Peter
next prev parent reply other threads:[~2022-10-18 21:06 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-06 10:41 Evgeniy Baskov
2022-09-06 10:41 ` [PATCH 01/16] x86/boot: Align vmlinuz sections on page size Evgeniy Baskov
2022-10-19 7:01 ` Ard Biesheuvel
2022-10-20 11:13 ` Evgeniy Baskov
2022-09-06 10:41 ` [PATCH 02/16] x86/build: Remove RWX sections and align on 4KB Evgeniy Baskov
2022-10-19 7:04 ` Ard Biesheuvel
2022-10-20 11:15 ` Evgeniy Baskov
2022-09-06 10:41 ` [PATCH 03/16] x86/boot: Set cr0 to known state in trampoline Evgeniy Baskov
2022-10-19 7:06 ` Ard Biesheuvel
2022-10-20 11:23 ` Evgeniy Baskov
2022-10-19 7:44 ` Andrew Cooper
2022-10-20 13:25 ` Evgeniy Baskov
2022-09-06 10:41 ` [PATCH 04/16] x86/boot: Increase boot page table size Evgeniy Baskov
2022-10-19 7:08 ` Ard Biesheuvel
2022-10-20 11:29 ` Evgeniy Baskov
2022-09-06 10:41 ` [PATCH 05/16] x86/boot: Support 4KB pages for identity mapping Evgeniy Baskov
2022-10-19 7:11 ` Ard Biesheuvel
2022-10-20 11:30 ` Evgeniy Baskov
2022-09-06 10:41 ` [PATCH 06/16] x86/boot: Setup memory protection for bzImage code Evgeniy Baskov
2022-10-19 7:17 ` Ard Biesheuvel
2022-10-20 12:07 ` Evgeniy Baskov
2022-10-19 7:57 ` Andrew Cooper
2022-10-20 13:30 ` Evgeniy Baskov
2022-10-20 16:51 ` Andrew Cooper
2022-09-06 10:41 ` [PATCH 07/16] x86/boot: Map memory explicitly Evgeniy Baskov
2022-09-06 10:41 ` [PATCH 08/16] x86/boot: Remove mapping from page fault handler Evgeniy Baskov
2022-10-19 7:20 ` Ard Biesheuvel
2022-09-06 10:41 ` [PATCH 09/16] efi/libstub: Move helper function to related file Evgeniy Baskov
2022-10-19 7:21 ` Ard Biesheuvel
2022-09-06 10:41 ` [PATCH 10/16] x86/boot: Make console interface more abstract Evgeniy Baskov
2022-10-19 7:23 ` Ard Biesheuvel
2022-10-20 12:10 ` Evgeniy Baskov
2022-09-06 10:41 ` [PATCH 11/16] x86/boot: Split trampoline and pt init code Evgeniy Baskov
2022-09-06 10:41 ` [PATCH 12/16] x86/boot: Add EFI kernel extraction interface Evgeniy Baskov
2022-10-19 7:27 ` Ard Biesheuvel
2022-10-20 12:14 ` Evgeniy Baskov
2022-09-06 10:41 ` [PATCH 13/16] efi/x86: Support extracting kernel from libstub Evgeniy Baskov
2022-10-19 7:35 ` Ard Biesheuvel
2022-10-20 12:36 ` Evgeniy Baskov
2022-09-06 10:41 ` [PATCH 14/16] x86/build: Make generated PE more spec compliant Evgeniy Baskov
2022-10-19 7:39 ` Ard Biesheuvel
2022-10-20 13:07 ` Evgeniy Baskov
2022-09-06 10:41 ` [PATCH 15/16] efi/libstub: Add memory attribute protocol definitions Evgeniy Baskov
2022-10-19 7:39 ` Ard Biesheuvel
2022-09-06 10:41 ` [PATCH 16/16] efi/libstub: Use memory attribute protocol Evgeniy Baskov
2022-10-18 20:51 ` [PATCH] efi/libstub: make memory protection warnings include newlines Peter Jones
2022-10-19 7:44 ` Ard Biesheuvel
2022-10-19 7:42 ` [PATCH 16/16] efi/libstub: Use memory attribute protocol Ard Biesheuvel
2022-10-20 13:13 ` Evgeniy Baskov
2022-10-18 21:04 ` Peter Jones [this message]
2022-10-20 11:05 ` [PATCH 00/16] x86_64: Improvements at compressed kernel stage Evgeniy Baskov
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