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From: Ard Biesheuvel <ardb@kernel.org>
To: linux-arm-kernel@lists.infradead.org
Cc: mark.rutland@arm.com, android-kvm@google.com,
	Ard Biesheuvel <ardb@kernel.org>, Marc Zyngier <maz@kernel.org>,
	Will Deacon <will@kernel.org>
Subject: [RFC PATCH 5/8] arm64: head: populate page tables before disabling the MMU
Date: Fri,  4 Mar 2022 18:56:54 +0100	[thread overview]
Message-ID: <20220304175657.2744400-6-ardb@kernel.org> (raw)
In-Reply-To: <20220304175657.2744400-1-ardb@kernel.org>

Reorder the call to init_kernel_el() with the creation of the page
tables so the latter code runs with MMU and caches enabled if that is
how we entered.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
 arch/arm64/kernel/head.S | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S
index b82c86fc9141..6041078df62a 100644
--- a/arch/arm64/kernel/head.S
+++ b/arch/arm64/kernel/head.S
@@ -93,9 +93,9 @@ SYM_CODE_START(primary_entry)
 	bl	record_mmu_state
 	bl	record_kaslr_offset
 	bl	preserve_boot_args
+	bl	__create_page_tables
 	bl	init_kernel_el			// w0=cpu_boot_mode
 	bl	set_cpu_boot_mode_flag
-	bl	__create_page_tables
 	/*
 	 * The following calls CPU setup code, see arch/arm64/mm/proc.S for
 	 * details.
-- 
2.30.2


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  parent reply	other threads:[~2022-03-04 18:00 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-03-04 17:56 [RFC PATCH 0/8] arm64: efi: leave MMU and caches on at boot Ard Biesheuvel
2022-03-04 17:56 ` [RFC PATCH 1/8] arm64: kaslr: deal with init called with VA randomization enabled Ard Biesheuvel
2022-03-04 17:56 ` [RFC PATCH 2/8] arm64: head: record the MMU state at primary entry Ard Biesheuvel
2022-03-04 17:56 ` [RFC PATCH 3/8] arm64: head: take KASLR seed passed via x1 into account Ard Biesheuvel
2022-03-04 17:56 ` [RFC PATCH 4/8] arm64: head: avoid cache invalidation when entering with the MMU on Ard Biesheuvel
2022-03-04 17:56 ` Ard Biesheuvel [this message]
2022-03-04 17:56 ` [RFC PATCH 6/8] arm64: head: clean the ID map page to the PoC Ard Biesheuvel
2022-03-04 17:56 ` [RFC PATCH 7/8] arm64: lds: move idmap_pg_dir out of .rodata Ard Biesheuvel
2022-03-04 17:56 ` [RFC PATCH 8/8] arm64: efi: leave MMU and caches on when handing over to the core kernel Ard Biesheuvel

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