[{"id":3672628,"web_url":"http://patchwork.ozlabs.org/comment/3672628/","msgid":"","list_archive_url":null,"date":"2026-04-02T09:21:19","subject":"Re: [PATCH 6/6] memory: reserve from start_addr_sp to relocaddr","submitter":{"id":74147,"url":"http://patchwork.ozlabs.org/api/people/74147/","name":"Ilias Apalodimas","email":"ilias.apalodimas@linaro.org"},"content":"On Thu, 2 Apr 2026 at 03:14, wrote:\n>\n> From: Randolph Sapp \n>\n> Reserve the memory from gd->start_addr_sp - CONFIG_STACK_SIZE to\n> gd->relocaddr instead of gd->ram_top. This allows platform specific\n> relocation addresses to work without unnecessarily painting over a large\n> range.\n\nThis hangs when trying to boot with UEFI on QEMU aarch64.\nWith the qemu_arm64_lwip_defconfig and this command line\n\nqemu-system-aarch64 -m 8192 -smp 2 -nographic -cpu cortex-a57 \\\n -machine virt,secure=off \\\n -bios u-boot.bin \\\n -device virtio-rng-pci \\\n -drive id=os,if=none,file=my.iso \\\n -device virtio-blk-device,drive=os \\\n -object memory-backend-ram,id=ram0,size=4G \\\n -object memory-backend-ram,id=ram1,size=4G \\\n -numa node,memdev=ram0 \\\n -numa node,memdev=ram1\n\nIt also hangs when trying to initialize the EFI subsystem in general,\ne.g 'efidebug memmap', probably because some EFI code is relocated on\nthe region you exlcuded.\n\nThanks\n/Ilias\n\n>\n> Signed-off-by: Randolph Sapp \n> ---\n> lib/efi_loader/efi_memory.c | 4 ++--\n> lib/lmb.c | 2 +-\n> 2 files changed, 3 insertions(+), 3 deletions(-)\n>\n> diff --git a/lib/efi_loader/efi_memory.c b/lib/efi_loader/efi_memory.c\n> index f07cc39b157..57691d15758 100644\n> --- a/lib/efi_loader/efi_memory.c\n> +++ b/lib/efi_loader/efi_memory.c\n> @@ -915,8 +915,8 @@ static void add_u_boot_and_runtime(void)\n> /* Add U-Boot */\n> uboot_start = ((uintptr_t)map_sysmem(gd->start_addr_sp, 0) -\n> uboot_stack_size) & ~EFI_PAGE_MASK;\n> - uboot_pages = ((uintptr_t)map_sysmem(gd->ram_top - 1, 0) -\n> - uboot_start + EFI_PAGE_MASK) >> EFI_PAGE_SHIFT;\n> + uboot_pages = ((gd->relocaddr - uboot_start) + EFI_PAGE_MASK) >>\n> + EFI_PAGE_SHIFT;\n> efi_update_memory_map(uboot_start, uboot_pages, EFI_BOOT_SERVICES_CODE,\n> false, false);\n> #if defined(__aarch64__)\n> diff --git a/lib/lmb.c b/lib/lmb.c\n> index 542bb11dcf5..0df8157db7f 100644\n> --- a/lib/lmb.c\n> +++ b/lib/lmb.c\n> @@ -540,7 +540,7 @@ static void lmb_reserve_uboot_region(void)\n> ulong pram = 0;\n>\n> rsv_start = gd->start_addr_sp - CONFIG_STACK_SIZE;\n> - end = gd->ram_top;\n> + end = gd->relocaddr;\n>\n> /*\n> * Reserve memory from aligned address below the bottom of U-Boot stack\n> --\n> 2.53.0\n>","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=linaro.org header.i=@linaro.org header.a=rsa-sha256\n header.s=google header.b=b+1x4emI;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de\n (client-ip=2a01:238:438b:c500:173d:9f52:ddab:ee01; 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Thu, 02 Apr 2026\n 02:21:56 -0700 (PDT)","MIME-Version":"1.0","References":"<20260402001410.3736815-1-rs@ti.com>\n <20260402001410.3736815-7-rs@ti.com>","In-Reply-To":"<20260402001410.3736815-7-rs@ti.com>","From":"Ilias Apalodimas ","Date":"Thu, 2 Apr 2026 12:21:19 +0300","X-Gm-Features":"AQROBzDagyJ3VYrmDmxKEyu8jJfOaHVi2KOTQjyx1A54cY-P7nccXsGupGnrlBs","Message-ID":"\n ","Subject":"Re: [PATCH 6/6] memory: reserve from start_addr_sp to relocaddr","To":"rs@ti.com","Cc":"robertcnelson@gmail.com, ayush@beagleboard.org,\n Erik.Welsh@octavosystems.com, anshuld@ti.com, bb@ti.com, trini@konsulko.com,\n afd@ti.com, xypron.glpk@gmx.de, u-boot@lists.denx.de","Content-Type":"text/plain; charset=\"UTF-8\"","X-BeenThere":"u-boot@lists.denx.de","X-Mailman-Version":"2.1.39","Precedence":"list","List-Id":"U-Boot discussion ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"u-boot-bounces@lists.denx.de","Sender":"\"U-Boot\" ","X-Virus-Scanned":"clamav-milter 0.103.8 at phobos.denx.de","X-Virus-Status":"Clean"}},{"id":3672872,"web_url":"http://patchwork.ozlabs.org/comment/3672872/","msgid":"","list_archive_url":null,"date":"2026-04-02T19:15:25","subject":"Re: [PATCH 6/6] memory: reserve from start_addr_sp to relocaddr","submitter":{"id":88727,"url":"http://patchwork.ozlabs.org/api/people/88727/","name":"Randolph Sapp","email":"rs@ti.com"},"content":"On Thu Apr 2, 2026 at 4:21 AM CDT, Ilias Apalodimas wrote:\n> On Thu, 2 Apr 2026 at 03:14, wrote:\n>>\n>> From: Randolph Sapp \n>>\n>> Reserve the memory from gd->start_addr_sp - CONFIG_STACK_SIZE to\n>> gd->relocaddr instead of gd->ram_top. This allows platform specific\n>> relocation addresses to work without unnecessarily painting over a large\n>> range.\n>\n> This hangs when trying to boot with UEFI on QEMU aarch64.\n> With the qemu_arm64_lwip_defconfig and this command line\n>\n> qemu-system-aarch64 -m 8192 -smp 2 -nographic -cpu cortex-a57 \\\n> -machine virt,secure=off \\\n> -bios u-boot.bin \\\n> -device virtio-rng-pci \\\n> -drive id=os,if=none,file=my.iso \\\n> -device virtio-blk-device,drive=os \\\n> -object memory-backend-ram,id=ram0,size=4G \\\n> -object memory-backend-ram,id=ram1,size=4G \\\n> -numa node,memdev=ram0 \\\n> -numa node,memdev=ram1\n>\n> It also hangs when trying to initialize the EFI subsystem in general,\n> e.g 'efidebug memmap', probably because some EFI code is relocated on\n> the region you exlcuded.\n>\n> Thanks\n> /Ilias\n\nThanks for the QEMU testcase. I see now there are a few cases where\ngd->relocaddr can actually be decremented, meaning we won't actually cover the\nentire u-boot memory region. I've added a new global data struct member\n(end_addr_sp, but if anyone has any better name feel free to comment) to track\nthe original value of relocaddr set by setup_dest_addr and it works like a\ncharm.\n\nI also realized that means I could cut out the PRAM and all of that bank\nspecific logic in lmb_reserve_uboot_region now, so that's cool.\n\n>>\n>> Signed-off-by: Randolph Sapp \n>> ---\n>> lib/efi_loader/efi_memory.c | 4 ++--\n>> lib/lmb.c | 2 +-\n>> 2 files changed, 3 insertions(+), 3 deletions(-)\n>>\n>> diff --git a/lib/efi_loader/efi_memory.c b/lib/efi_loader/efi_memory.c\n>> index f07cc39b157..57691d15758 100644\n>> --- a/lib/efi_loader/efi_memory.c\n>> +++ b/lib/efi_loader/efi_memory.c\n>> @@ -915,8 +915,8 @@ static void add_u_boot_and_runtime(void)\n>> /* Add U-Boot */\n>> uboot_start = ((uintptr_t)map_sysmem(gd->start_addr_sp, 0) -\n>> uboot_stack_size) & ~EFI_PAGE_MASK;\n>> - uboot_pages = ((uintptr_t)map_sysmem(gd->ram_top - 1, 0) -\n>> - uboot_start + EFI_PAGE_MASK) >> EFI_PAGE_SHIFT;\n>> + uboot_pages = ((gd->relocaddr - uboot_start) + EFI_PAGE_MASK) >>\n>> + EFI_PAGE_SHIFT;\n>> efi_update_memory_map(uboot_start, uboot_pages, EFI_BOOT_SERVICES_CODE,\n>> false, false);\n>> #if defined(__aarch64__)\n>> diff --git a/lib/lmb.c b/lib/lmb.c\n>> index 542bb11dcf5..0df8157db7f 100644\n>> --- a/lib/lmb.c\n>> +++ b/lib/lmb.c\n>> @@ -540,7 +540,7 @@ static void lmb_reserve_uboot_region(void)\n>> ulong pram = 0;\n>>\n>> rsv_start = gd->start_addr_sp - CONFIG_STACK_SIZE;\n>> - end = gd->ram_top;\n>> + end = gd->relocaddr;\n>>\n>> /*\n>> * Reserve memory from aligned address below the bottom of U-Boot stack\n>> --\n>> 2.53.0\n>>","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=ti.com header.i=@ti.com header.a=rsa-sha256\n header.s=selector1 header.b=jkO7j2q3;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de\n (client-ip=2a01:238:438b:c500:173d:9f52:ddab:ee01; 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