From: Stephen Boyd <sboyd@kernel.org>
To: Rob Herring <robh+dt@kernel.org>
Cc: linux-kernel@vger.kernel.org, patches@lists.linux.dev,
linux-um@lists.infradead.org,
linux-arm-kernel@lists.infradead.org, kunit-dev@googlegroups.com,
linux-kselftest@vger.kernel.org, devicetree@vger.kernel.org,
Frank Rowand <frowand.list@gmail.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Mark Rutland <mark.rutland@arm.com>
Subject: [PATCH v4 5/7] arm64: Unconditionally call unflatten_device_tree()
Date: Fri, 16 Feb 2024 17:05:54 -0800 [thread overview]
Message-ID: <20240217010557.2381548-6-sboyd@kernel.org> (raw)
In-Reply-To: <20240217010557.2381548-1-sboyd@kernel.org>
Call this function unconditionally so that we can populate an empty DTB
on platforms that don't boot with a firmware provided or builtin DTB.
When ACPI is in use, unflatten_device_tree() ignores the
'initial_boot_params' pointer so the live DT on those systems won't be
whatever that's pointing to. Similarly, when kexec copies the DT data
the previous kernel to the new one on ACPI systems,
of_kexec_alloc_and_setup_fdt() will ignore the live DT (the empty root
one) and copy the 'initial_boot_params' data.
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Frank Rowand <frowand.list@gmail.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: <linux-arm-kernel@lists.infradead.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
---
arch/arm64/kernel/setup.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
index 42c690bb2d60..0d210720d47d 100644
--- a/arch/arm64/kernel/setup.c
+++ b/arch/arm64/kernel/setup.c
@@ -351,8 +351,7 @@ void __init __no_sanitize_address setup_arch(char **cmdline_p)
/* Parse the ACPI tables for possible boot-time configuration */
acpi_boot_table_init();
- if (acpi_disabled)
- unflatten_device_tree();
+ unflatten_device_tree();
bootmem_init();
--
https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git/
https://git.kernel.org/pub/scm/linux/kernel/git/sboyd/spmi.git
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next prev parent reply other threads:[~2024-02-17 1:06 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-17 1:05 [PATCH v4 0/7] of: populate of_root node if bootloader doesn't Stephen Boyd
2024-02-17 1:05 ` [PATCH v4 1/7] of: Always unflatten in unflatten_and_copy_device_tree() Stephen Boyd
2024-02-17 1:05 ` [PATCH v4 2/7] of: Create of_root if no dtb provided by firmware Stephen Boyd
2024-02-17 1:05 ` [PATCH v4 3/7] um: Unconditionally call unflatten_device_tree() Stephen Boyd
2024-02-17 1:05 ` [PATCH v4 4/7] x86/of: Unconditionally call unflatten_and_copy_device_tree() Stephen Boyd
2024-02-17 1:05 ` Stephen Boyd [this message]
2024-02-23 0:03 ` [PATCH v4 5/7] arm64: Unconditionally call unflatten_device_tree() Rob Herring
2024-02-23 10:23 ` Will Deacon
2024-02-23 18:17 ` Rob Herring
2024-02-27 17:34 ` Mark Rutland
2024-02-28 16:26 ` Rob Herring
2024-03-07 15:09 ` Herve Codina
2024-02-27 17:22 ` Oreoluwa Babatunde
2024-02-17 1:05 ` [PATCH v4 6/7] of: unittest: treat missing of_root as error instead of fixing up Stephen Boyd
2024-02-17 1:05 ` [PATCH v4 7/7] of: Add KUnit test to confirm DTB is loaded Stephen Boyd
2024-03-08 19:57 ` [PATCH v4 0/7] of: populate of_root node if bootloader doesn't Rob Herring
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