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[34.91.112.104]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-adec892b216sm1112822266b.135.2025.06.18.14.07.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Jun 2025 14:07:01 -0700 (PDT) From: Grzegorz Jaszczyk To: tglx@linutronix.de, robh@kernel.org Cc: mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, saravanak@google.com, dmaluka@chromium.org, bgrzesik@google.com, jaszczyk@google.com, ilpo.jarvinen@linux.intel.com, usamaarif642@gmail.com, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, tnowicki@google.com, mazurekm@google.com, vineethrp@google.com, rppt@kernel.org, agordeev@linux.ibm.com, dyoung@redhat.com, myrrhperiwinkle@qtmlabs.xyz, guoweikang.kernel@gmail.com, kirill.shutemov@linux.intel.com, akpm@linux-foundation.org, joel.granados@kernel.org, sourabhjain@linux.ibm.com Subject: [PATCH v3 RESEND 1/2] x86/of: add support for reserved memory defined by DT Date: Wed, 18 Jun 2025 21:06:27 +0000 Message-ID: <20250618210628.2635891-2-jaszczyk@chromium.org> X-Mailer: git-send-email 2.50.0.rc2.701.gf1e915cc24-goog In-Reply-To: <20250618210628.2635891-1-jaszczyk@chromium.org> References: <20250618210628.2635891-1-jaszczyk@chromium.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Grzegorz Jaszczyk The DT reserved-memory nodes can be present in DT as described in Documentation/devicetree/bindings/reserved-memory/reserved-memory.yaml. Similar to other architecture, which supports DT, there is a need to create reserved memory regions for such nodes. Additionally this patch changes the sequence and calls x86_flattree_get_config earlier during memblock setup, just after e820 memblock setup, so the DT reserved-memory can be properly reflected in the memblock before it is used for allocation. Signed-off-by: Grzegorz Jaszczyk --- arch/x86/kernel/devicetree.c | 1 + arch/x86/kernel/setup.c | 4 ++-- 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/devicetree.c b/arch/x86/kernel/devicetree.c index dd8748c45529..f7db0e8f9c3e 100644 --- a/arch/x86/kernel/devicetree.c +++ b/arch/x86/kernel/devicetree.c @@ -307,6 +307,7 @@ void __init x86_flattree_get_config(void) } =20 early_init_dt_verify(dt, __pa(dt)); + early_init_fdt_scan_reserved_mem(); } =20 unflatten_and_copy_device_tree(); diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index fb27be697128..1c6fcb0bc65e 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -1069,6 +1069,8 @@ void __init setup_arch(char **cmdline_p) =20 e820__memblock_setup(); =20 + x86_flattree_get_config(); + /* * Needs to run after memblock setup because it needs the physical * memory size. @@ -1179,8 +1181,6 @@ void __init setup_arch(char **cmdline_p) early_acpi_boot_init(); x86_init.mpparse.early_parse_smp_cfg(); =20 - x86_flattree_get_config(); - initmem_init(); dma_contiguous_reserve(max_pfn_mapped << PAGE_SHIFT); =20 --=20 2.50.0.rc2.701.gf1e915cc24-goog