linux-kernel - [PATCH] arm64: head: rely on CONFIG_RANDOM_TRUST

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Message-Id: <20220817094618.67063-1-andrea.righi@canonical.com>
Date:   Wed, 17 Aug 2022 11:46:18 +0200
From:   Andrea Righi <andrea.righi@...onical.com>
To:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] arm64: head: rely on CONFIG_RANDOM_TRUST_CPU

The CONFIG_ARCH_RANDOM .config option has been removed by
commit 9592eef7c16e ("random: remove CONFIG_ARCH_RANDOM").

Depend on CONFIG_RANDOM_TRUST_CPU to determine whether we can rely on
__arm64_rndr() to initialize the seed for kaslr.

Fixes: 9592eef7c16e ("random: remove CONFIG_ARCH_RANDOM")
Signed-off-by: Andrea Righi <andrea.righi@...onical.com>
---
 arch/arm64/kernel/pi/kaslr_early.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/pi/kaslr_early.c b/arch/arm64/kernel/pi/kaslr_early.c
index 6c3855e69395..a1e6f90cb6e2 100644
--- a/arch/arm64/kernel/pi/kaslr_early.c
+++ b/arch/arm64/kernel/pi/kaslr_early.c
@@ -94,7 +94,7 @@ asmlinkage u64 kaslr_early_init(void *fdt)
 
 	seed = get_kaslr_seed(fdt);
 	if (!seed) {
-#ifdef CONFIG_ARCH_RANDOM
+#ifdef CONFIG_RANDOM_TRUST_CPU
 		 if (!__early_cpu_has_rndr() ||
 		     !__arm64_rndr((unsigned long *)&seed))
 #endif
-- 
2.34.1