From: WANG Rui <r@hev.cc>
To: Huacai Chen <chenhuacai@kernel.org>, Ard Biesheuvel <ardb@kernel.org>
Cc: WANG Xuerui <kernel@xen0n.name>,
Ilias Apalodimas <ilias.apalodimas@linaro.org>,
loongarch@lists.linux.dev, linux-efi@vger.kernel.org,
linux-kernel@vger.kernel.org, WANG Rui <r@hev.cc>
Subject: [PATCH 3/3] LoongArch: Skip relocation-time KASLR if it has already been applied
Date: Mon, 27 Apr 2026 18:47:21 +0800 [thread overview]
Message-ID: <20260427104721.47724-4-r@hev.cc> (raw)
In-Reply-To: <20260427104721.47724-1-r@hev.cc>
When the kernel is relocated during early boot, a randomized load
address may already have been selected and applied. In this case,
performing KASLR again in relocate.c is unnecessary.
Signed-off-by: WANG Rui <r@hev.cc>
---
arch/loongarch/kernel/relocate.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/loongarch/kernel/relocate.c b/arch/loongarch/kernel/relocate.c
index 16f6a9b39659..c36604a81d08 100644
--- a/arch/loongarch/kernel/relocate.c
+++ b/arch/loongarch/kernel/relocate.c
@@ -139,6 +139,10 @@ static inline __init bool kaslr_disabled(void)
char *str;
const char *builtin_cmdline = CONFIG_CMDLINE;
+ /* KASLR is performed during early boot. */
+ if (kaslr_offset())
+ return true;
+
str = strstr(builtin_cmdline, "nokaslr");
if (str == builtin_cmdline || (str > builtin_cmdline && *(str - 1) == ' ')) {
pr_info(KASLR_DISABLED_MESSAGE, "\'nokaslr\'", "built-in");
--
2.54.0
next prev parent reply other threads:[~2026-04-27 10:47 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-27 10:47 [PATCH 0/3] LoongArch: Move KASLR to EFI stub to avoid initrd overlap WANG Rui
2026-04-27 10:47 ` [PATCH 1/3] LoongArch: Allow rdtime_h() and rdtime_l() in 64-bit builds WANG Rui
2026-04-27 10:47 ` [PATCH 2/3] efi/loongarch: Randomize kernel preferred address for KASLR WANG Rui
2026-04-27 13:27 ` Huacai Chen
2026-04-27 15:29 ` hev
2026-04-27 10:47 ` WANG Rui [this message]
2026-04-27 13:29 ` [PATCH 3/3] LoongArch: Skip relocation-time KASLR if it has already been applied Huacai Chen
2026-04-27 15:30 ` hev
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