[{"id":3680054,"web_url":"http://patchwork.ozlabs.org/comment/3680054/","msgid":"","list_archive_url":null,"date":"2026-04-21T20:40:51","subject":"Re: [PATCHv4 2/6] boot_fdt_add_mem_rsv_regions: free old dtb\n reservations","submitter":{"id":6170,"url":"http://patchwork.ozlabs.org/api/people/6170/","name":"Simon Glass","email":"sjg@chromium.org"},"content":"Hi Randolph,\n\nOn 2026-04-20T19:25:18, Randolph Sapp wrote:\n> boot_fdt_add_mem_rsv_regions: free old dtb reservations\n>\n> Add a free flag and an initial call to free allocations covered by the\n> global FDT. This assumes that all calls to boot_fdt_add_mem_rsv_regions\n> occur before the transition to the new device tree, thus we can access\n> the currently active device tree through the global data pointer.\n>\n> This allows us to clearly indicate to the user when a device tree\n> reservation fails. How we handle this can still use some improvement.\n> Right now we'll keep the default behavior and try to boot anyway.\n>\n> This functionality was broken in:\n> 5a6aa7d (\"boot: fdt: Handle already reserved memory in boot_fdt_reserve_region()\")\n>\n> Signed-off-by: Randolph Sapp \n>\n> arch/mips/lib/bootm.c | 2 +-\n> boot/bootm.c | 2 +-\n> boot/bootm_os.c | 2 +-\n> boot/image-board.c | 2 +-\n> boot/image-fdt.c | 57 +++++++++++++++++++++++++++++++++++----------------\n> include/image.h | 2 +-\n> lib/lmb.c | 2 +-\n> 7 files changed, 45 insertions(+), 24 deletions(-)\n\n> diff --git a/boot/image-fdt.c b/boot/image-fdt.c\n> @@ -69,35 +69,51 @@ static const struct legacy_img_hdr *image_get_fdt(ulong fdt_addr)\n> +static void boot_fdt_reserve_region(u64 addr, u64 size, u32 flags, bool free)\n> {\n> - long ret;\n> + int ret;\n\nnit: perhaps keep this one 'long' since lmb_free() returns long ?\n\nRegards,\nSimon","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=chromium.org header.i=@chromium.org header.a=rsa-sha256\n header.s=google header.b=d3Jgd+LQ;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de\n (client-ip=85.214.62.61; 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Tue, 21 Apr 2026\n 13:41:03 -0700 (PDT)","MIME-Version":"1.0","References":"<20260420192520.1444749-1-rs@ti.com>\n <20260420192520.1444749-3-rs@ti.com>","In-Reply-To":"<20260420192520.1444749-3-rs@ti.com>","From":"Simon Glass ","Date":"Wed, 22 Apr 2026 08:40:51 +1200","X-Gm-Features":"AQROBzAUjeroKDli-DbiyaZviQPRrFL9rLle9PoHSJS73bheZ9_NDbJ0JqBGf0w","Message-ID":"\n ","Subject":"Re: [PATCHv4 2/6] boot_fdt_add_mem_rsv_regions: free old dtb\n reservations","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, ilias.apalodimas@linaro.org,\n 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":3680087,"web_url":"http://patchwork.ozlabs.org/comment/3680087/","msgid":"","list_archive_url":null,"date":"2026-04-21T22:14:14","subject":"Re: [PATCHv4 2/6] boot_fdt_add_mem_rsv_regions: free old dtb\n reservations","submitter":{"id":88727,"url":"http://patchwork.ozlabs.org/api/people/88727/","name":"Randolph Sapp","email":"rs@ti.com"},"content":"On Tue Apr 21, 2026 at 3:40 PM CDT, Simon Glass wrote:\n> Hi Randolph,\n>\n> On 2026-04-20T19:25:18, Randolph Sapp wrote:\n>> boot_fdt_add_mem_rsv_regions: free old dtb reservations\n>>\n>> Add a free flag and an initial call to free allocations covered by the\n>> global FDT. This assumes that all calls to boot_fdt_add_mem_rsv_regions\n>> occur before the transition to the new device tree, thus we can access\n>> the currently active device tree through the global data pointer.\n>>\n>> This allows us to clearly indicate to the user when a device tree\n>> reservation fails. How we handle this can still use some improvement.\n>> Right now we'll keep the default behavior and try to boot anyway.\n>>\n>> This functionality was broken in:\n>> 5a6aa7d (\"boot: fdt: Handle already reserved memory in boot_fdt_reserve_region()\")\n>>\n>> Signed-off-by: Randolph Sapp \n>>\n>> arch/mips/lib/bootm.c | 2 +-\n>> boot/bootm.c | 2 +-\n>> boot/bootm_os.c | 2 +-\n>> boot/image-board.c | 2 +-\n>> boot/image-fdt.c | 57 +++++++++++++++++++++++++++++++++++----------------\n>> include/image.h | 2 +-\n>> lib/lmb.c | 2 +-\n>> 7 files changed, 45 insertions(+), 24 deletions(-)\n>\n>> diff --git a/boot/image-fdt.c b/boot/image-fdt.c\n>> @@ -69,35 +69,51 @@ static const struct legacy_img_hdr *image_get_fdt(ulong fdt_addr)\n>> +static void boot_fdt_reserve_region(u64 addr, u64 size, u32 flags, bool free)\n>> {\n>> - long ret;\n>> + int ret;\n>\n> nit: perhaps keep this one 'long' since lmb_free() returns long ?\n>\n> Regards,\n> Simon\n\nUgh, yeah though it should only return 0, -EEXIST, or -1 since that's all\nlmb_add_region_flags returns. I'm not going to ask why that's the case.","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=r+yCFbOR;\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; helo=phobos.denx.de;\n envelope-from=u-boot-bounces@lists.denx.de; receiver=patchwork.ozlabs.org)","phobos.denx.de;\n dmarc=pass (p=quarantine dis=none) header.from=ti.com","phobos.denx.de;\n spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de","phobos.denx.de;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=ti.com header.i=@ti.com header.b=\"r+yCFbOR\";\n\tdkim-atps=neutral","phobos.denx.de;\n dmarc=pass (p=quarantine dis=none) header.from=ti.com","phobos.denx.de; spf=pass smtp.mailfrom=rs@ti.com"],"Received":["from phobos.denx.de (phobos.denx.de\n [IPv6:2a01:238:438b:c500:173d:9f52:ddab:ee01])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g0c8s6rYPz1yGs\n\tfor ; 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Ip=[198.47.21.194];\n Helo=[flwvzet200.ext.ti.com]","X-MS-Exchange-CrossTenant-AuthSource":"\n BN2PEPF000055E0.namprd21.prod.outlook.com","X-MS-Exchange-CrossTenant-AuthAs":"Anonymous","X-MS-Exchange-CrossTenant-FromEntityHeader":"HybridOnPrem","X-MS-Exchange-Transport-CrossTenantHeadersStamped":"IA1PR10MB5972","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":3680123,"web_url":"http://patchwork.ozlabs.org/comment/3680123/","msgid":"","list_archive_url":null,"date":"2026-04-21T22:54:13","subject":"Re: [PATCHv4 2/6] boot_fdt_add_mem_rsv_regions: free old dtb\n reservations","submitter":{"id":6170,"url":"http://patchwork.ozlabs.org/api/people/6170/","name":"Simon Glass","email":"sjg@chromium.org"},"content":"Hi Randolph,\n\nOn Wed, 22 Apr 2026 at 10:14, Randolph Sapp wrote:\n>\n> On Tue Apr 21, 2026 at 3:40 PM CDT, Simon Glass wrote:\n> > Hi Randolph,\n> >\n> > On 2026-04-20T19:25:18, Randolph Sapp wrote:\n> >> boot_fdt_add_mem_rsv_regions: free old dtb reservations\n> >>\n> >> Add a free flag and an initial call to free allocations covered by the\n> >> global FDT. This assumes that all calls to boot_fdt_add_mem_rsv_regions\n> >> occur before the transition to the new device tree, thus we can access\n> >> the currently active device tree through the global data pointer.\n> >>\n> >> This allows us to clearly indicate to the user when a device tree\n> >> reservation fails. How we handle this can still use some improvement.\n> >> Right now we'll keep the default behavior and try to boot anyway.\n> >>\n> >> This functionality was broken in:\n> >> 5a6aa7d (\"boot: fdt: Handle already reserved memory in boot_fdt_reserve_region()\")\n> >>\n> >> Signed-off-by: Randolph Sapp \n> >>\n> >> arch/mips/lib/bootm.c | 2 +-\n> >> boot/bootm.c | 2 +-\n> >> boot/bootm_os.c | 2 +-\n> >> boot/image-board.c | 2 +-\n> >> boot/image-fdt.c | 57 +++++++++++++++++++++++++++++++++++----------------\n> >> include/image.h | 2 +-\n> >> lib/lmb.c | 2 +-\n> >> 7 files changed, 45 insertions(+), 24 deletions(-)\n> >\n> >> diff --git a/boot/image-fdt.c b/boot/image-fdt.c\n> >> @@ -69,35 +69,51 @@ static const struct legacy_img_hdr *image_get_fdt(ulong fdt_addr)\n> >> +static void boot_fdt_reserve_region(u64 addr, u64 size, u32 flags, bool free)\n> >> {\n> >> - long ret;\n> >> + int ret;\n> >\n> > nit: perhaps keep this one 'long' since lmb_free() returns long ?\n> >\n> > Regards,\n> > Simon\n>\n> Ugh, yeah though it should only return 0, -EEXIST, or -1 since that's all\n> lmb_add_region_flags returns. I'm not going to ask why that's the case.\n\nAh yes, I suppose it could be changed to return an int.\n\nRegards,\nSimon","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=chromium.org header.i=@chromium.org header.a=rsa-sha256\n header.s=google header.b=a/87x80o;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de\n (client-ip=85.214.62.61; helo=phobos.denx.de;\n envelope-from=u-boot-bounces@lists.denx.de; receiver=patchwork.ozlabs.org)","phobos.denx.de;\n dmarc=pass (p=none dis=none) header.from=chromium.org","phobos.denx.de;\n spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de","phobos.denx.de;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=chromium.org header.i=@chromium.org\n header.b=\"a/87x80o\";\n\tdkim-atps=neutral","phobos.denx.de;\n dmarc=pass (p=none dis=none) header.from=chromium.org","phobos.denx.de;\n spf=pass smtp.mailfrom=sjg@chromium.org"],"Received":["from phobos.denx.de (phobos.denx.de [85.214.62.61])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g0d2v1rJKz1yD5\n\tfor ; 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Tue, 21 Apr 2026\n 15:54:25 -0700 (PDT)","MIME-Version":"1.0","References":"<20260420192520.1444749-1-rs@ti.com>\n <20260420192520.1444749-3-rs@ti.com>\n \n ","In-Reply-To":"","From":"Simon Glass ","Date":"Wed, 22 Apr 2026 10:54:13 +1200","X-Gm-Features":"AQROBzCU23CVpGruY4Cu5iYaLAc-kESq2FsXOTxhP7CquQp_kUE0vR_eBSwoxfM","Message-ID":"\n ","Subject":"Re: [PATCHv4 2/6] boot_fdt_add_mem_rsv_regions: free old dtb\n reservations","To":"Randolph Sapp ","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, ilias.apalodimas@linaro.org,\n 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":3680124,"web_url":"http://patchwork.ozlabs.org/comment/3680124/","msgid":"","list_archive_url":null,"date":"2026-04-21T22:55:52","subject":"Re: [PATCHv4 2/6] boot_fdt_add_mem_rsv_regions: free old dtb\n reservations","submitter":{"id":88727,"url":"http://patchwork.ozlabs.org/api/people/88727/","name":"Randolph Sapp","email":"rs@ti.com"},"content":"On Tue Apr 21, 2026 at 5:54 PM CDT, Simon Glass wrote:\n> Hi Randolph,\n>\n> On Wed, 22 Apr 2026 at 10:14, Randolph Sapp wrote:\n>>\n>> On Tue Apr 21, 2026 at 3:40 PM CDT, Simon Glass wrote:\n>> > Hi Randolph,\n>> >\n>> > On 2026-04-20T19:25:18, Randolph Sapp wrote:\n>> >> boot_fdt_add_mem_rsv_regions: free old dtb reservations\n>> >>\n>> >> Add a free flag and an initial call to free allocations covered by the\n>> >> global FDT. This assumes that all calls to boot_fdt_add_mem_rsv_regions\n>> >> occur before the transition to the new device tree, thus we can access\n>> >> the currently active device tree through the global data pointer.\n>> >>\n>> >> This allows us to clearly indicate to the user when a device tree\n>> >> reservation fails. How we handle this can still use some improvement.\n>> >> Right now we'll keep the default behavior and try to boot anyway.\n>> >>\n>> >> This functionality was broken in:\n>> >> 5a6aa7d (\"boot: fdt: Handle already reserved memory in boot_fdt_reserve_region()\")\n>> >>\n>> >> Signed-off-by: Randolph Sapp \n>> >>\n>> >> arch/mips/lib/bootm.c | 2 +-\n>> >> boot/bootm.c | 2 +-\n>> >> boot/bootm_os.c | 2 +-\n>> >> boot/image-board.c | 2 +-\n>> >> boot/image-fdt.c | 57 +++++++++++++++++++++++++++++++++++----------------\n>> >> include/image.h | 2 +-\n>> >> lib/lmb.c | 2 +-\n>> >> 7 files changed, 45 insertions(+), 24 deletions(-)\n>> >\n>> >> diff --git a/boot/image-fdt.c b/boot/image-fdt.c\n>> >> @@ -69,35 +69,51 @@ static const struct legacy_img_hdr *image_get_fdt(ulong fdt_addr)\n>> >> +static void boot_fdt_reserve_region(u64 addr, u64 size, u32 flags, bool free)\n>> >> {\n>> >> - long ret;\n>> >> + int ret;\n>> >\n>> > nit: perhaps keep this one 'long' since lmb_free() returns long ?\n>> >\n>> > Regards,\n>> > Simon\n>>\n>> Ugh, yeah though it should only return 0, -EEXIST, or -1 since that's all\n>> lmb_add_region_flags returns. I'm not going to ask why that's the case.\n>\n> Ah yes, I suppose it could be changed to return an int.\n>\n> Regards,\n> Simon\n\nI'll leave that for later cleanup considering I've still got to get the\npocketbeagle2 series submitted after this stuff.","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=VkFRlQ6S;\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; helo=phobos.denx.de;\n envelope-from=u-boot-bounces@lists.denx.de; receiver=patchwork.ozlabs.org)","phobos.denx.de;\n dmarc=pass (p=quarantine dis=none) header.from=ti.com","phobos.denx.de;\n spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de","phobos.denx.de;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=ti.com header.i=@ti.com header.b=\"VkFRlQ6S\";\n\tdkim-atps=neutral","phobos.denx.de;\n dmarc=pass (p=quarantine dis=none) header.from=ti.com","phobos.denx.de; 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