From: Peter Jones <pjones@redhat.com>
To: baskov@ispras.ru
Cc: ardb@kernel.org, Matthew Garrett <mjg59@srcf.ucam.org>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
X86 ML <x86@kernel.org>, linux-efi <linux-efi@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Peter Jones <pjones@redhat.com>
Subject: [PATCH] x86: Set the NX-compatibility flag in the PE header
Date: Tue, 29 Mar 2022 14:47:43 -0400 [thread overview]
Message-ID: <20220329184743.798513-1-pjones@redhat.com> (raw)
In-Reply-To: <20220329184712.vl7jzq23h5m5kvqh@redhat.com>
Following Baskov Evgeniy's "Handle UEFI NX-restricted page tables"
patches, it's safe to set this compatibility flag to let loaders know
they don't need to make special accommodations for kernel to load if
pre-boot NX is enabled.
Signed-off-by: Peter Jones <pjones@redhat.com>
---
| 4 ++++
1 file changed, 4 insertions(+)
--git a/arch/x86/boot/header.S b/arch/x86/boot/header.S
index 6dbd7e9f74c..0352e4589ef 100644
--- a/arch/x86/boot/header.S
+++ b/arch/x86/boot/header.S
@@ -163,7 +163,11 @@ extra_header_fields:
.long 0x200 # SizeOfHeaders
.long 0 # CheckSum
.word IMAGE_SUBSYSTEM_EFI_APPLICATION # Subsystem (EFI application)
+#ifdef CONFIG_DXE_MEM_ATTRIBUTES
+ .word IMAGE_DLL_CHARACTERISTICS_NX_COMPAT # DllCharacteristics
+#else
.word 0 # DllCharacteristics
+#endif
#ifdef CONFIG_X86_32
.long 0 # SizeOfStackReserve
.long 0 # SizeOfStackCommit
--
2.35.1
next prev parent reply other threads:[~2022-03-29 18:47 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-24 15:43 [PATCH RFC v2 0/2] Handle UEFI NX-restricted page tables Baskov Evgeniy
2022-02-24 15:43 ` [PATCH RFC v2 1/2] libstub: declare DXE services table Baskov Evgeniy
2022-02-24 15:43 ` [PATCH RFC v2 2/2] libstub: ensure allocated memory to be executable Baskov Evgeniy
2022-02-28 16:45 ` [PATCH RFC v2 0/2] Handle UEFI NX-restricted page tables Ard Biesheuvel
2022-02-28 18:30 ` Matthew Garrett
2022-03-03 13:42 ` baskov
2022-03-03 20:47 ` Matthew Garrett
2022-03-17 13:26 ` baskov
2022-03-18 16:37 ` Peter Jones
2022-03-24 16:39 ` baskov
2022-03-25 8:06 ` Ard Biesheuvel
2022-04-13 17:50 ` Ard Biesheuvel
2022-03-29 18:47 ` Peter Jones
2022-03-29 18:47 ` Peter Jones [this message]
2022-04-13 17:48 ` [PATCH] x86: Set the NX-compatibility flag in the PE header Ard Biesheuvel
2022-03-03 14:15 ` [PATCH RFC v2 0/2] Handle UEFI NX-restricted page tables baskov
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