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[209.132.180.67]) by mx.google.com with ESMTP id p26si2253328oto.240.2020.02.11.11.22.47; Tue, 11 Feb 2020 11:22:59 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@kalray.eu header.s=32AE1B44-9502-11E5-BA35-3734643DEF29 header.b=CeMaUaM2; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=kalray.eu Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730930AbgBKQj1 (ORCPT + 99 others); Tue, 11 Feb 2020 11:39:27 -0500 Received: from zimbra2.kalray.eu ([92.103.151.219]:45940 "EHLO zimbra2.kalray.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728049AbgBKQj0 (ORCPT ); Tue, 11 Feb 2020 11:39:26 -0500 Received: from localhost (localhost [127.0.0.1]) by zimbra2.kalray.eu (Postfix) with ESMTP id 1106B27E03A0; Tue, 11 Feb 2020 17:39:23 +0100 (CET) Received: from zimbra2.kalray.eu ([127.0.0.1]) by localhost (zimbra2.kalray.eu [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id x5g-CL3ZOOOs; Tue, 11 Feb 2020 17:39:22 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by zimbra2.kalray.eu (Postfix) with ESMTP id 3B38227E1003; Tue, 11 Feb 2020 17:39:22 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.10.3 zimbra2.kalray.eu 3B38227E1003 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kalray.eu; s=32AE1B44-9502-11E5-BA35-3734643DEF29; t=1581439162; bh=8/HJBOOSglzCp3HuPAJfL4hVUnBGD/cVbGlSIGBH1CE=; h=Date:From:To:Message-ID:MIME-Version; b=CeMaUaM2PpTqglaFJW0OQBKWUDhJqCRb0aCthjAd0iqU3gzh+C6Nz7lxk74XXUAgG SZ7ck1Z6md4fW4hMY6LSV1gq1Mu21JE927hjphQr949o7ia9A+217qLAebO8kGzVDq OdzRpviVw9dglWJuB38eY5Pb10J9tGW4RnxbgTk4= X-Virus-Scanned: amavisd-new at zimbra2.kalray.eu Received: from zimbra2.kalray.eu ([127.0.0.1]) by localhost (zimbra2.kalray.eu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id Td__kMPthJ66; Tue, 11 Feb 2020 17:39:22 +0100 (CET) Received: from zimbra2.kalray.eu (localhost [127.0.0.1]) by zimbra2.kalray.eu (Postfix) with ESMTP id 1CEA627E03A0; Tue, 11 Feb 2020 17:39:22 +0100 (CET) Date: Tue, 11 Feb 2020 17:39:21 +0100 (CET) From: =?utf-8?Q?Cl=C3=A9ment?= Leger To: Arnaud Pouliquen Cc: Ohad Ben-Cohen , Bjorn Andersson , Jonathan Corbet , Shawn Guo , Sascha Hauer , linux-remoteproc , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , Andy Gross , Patrice Chotard , linux-doc , linux-kernel , linux-arm-kernel , linux-arm-msm , Loic PALLARDY , s-anna , Mathieu Poirier Message-ID: <884697376.3644142.1581439161953.JavaMail.zimbra@kalray.eu> In-Reply-To: <4465bade-e3de-88b8-63a5-e5410de9adc0@st.com> References: <527785289.2852303.1581062223707.JavaMail.zimbra@kalray.eu> <20200210162209.23149-1-cleger@kalray.eu> <20200210162209.23149-2-cleger@kalray.eu> <4465bade-e3de-88b8-63a5-e5410de9adc0@st.com> Subject: Re: [PATCH v4 1/5] remoteproc: Use u64 len for da_to_va MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [192.168.40.202] X-Mailer: Zimbra 8.8.15_GA_3895 (ZimbraWebClient - GC75 (Linux)/8.8.15_GA_3895) Thread-Topic: remoteproc: Use u64 len for da_to_va Thread-Index: /D6a0TgT7qxVtvc7mnAdJNBR4bQtYw== Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Arnaud, ----- On 11 Feb, 2020, at 16:53, Arnaud Pouliquen arnaud.pouliquen@st.com w= rote: > On 2/10/20 5:22 PM, Clement Leger wrote: >> With upcoming changes in elf loader for elf64 support, section size will >> be a u64. When used with da_to_va, this will potentially lead to >> overflow if using the current "int" type for len argument. Change >> da_to_va prototype to use a u64 for len and fix all users of this >> function. >>=20 >> Signed-off-by: Clement Leger >> --- >> drivers/remoteproc/imx_rproc.c | 11 ++++++----- >> drivers/remoteproc/keystone_remoteproc.c | 4 ++-- >> drivers/remoteproc/qcom_q6v5_adsp.c | 2 +- >> drivers/remoteproc/qcom_q6v5_mss.c | 2 +- >> drivers/remoteproc/qcom_q6v5_pas.c | 2 +- >> drivers/remoteproc/qcom_q6v5_wcss.c | 2 +- >> drivers/remoteproc/qcom_wcnss.c | 2 +- >> drivers/remoteproc/remoteproc_core.c | 2 +- >> drivers/remoteproc/remoteproc_internal.h | 2 +- >> drivers/remoteproc/st_slim_rproc.c | 4 ++-- >> drivers/remoteproc/wkup_m3_rproc.c | 4 ++-- >> include/linux/remoteproc.h | 2 +- >> 12 files changed, 20 insertions(+), 19 deletions(-) >>=20 >> diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rpr= oc.c >> index 3e72b6f38d4b..f497f5b49b18 100644 >> --- a/drivers/remoteproc/imx_rproc.c >> +++ b/drivers/remoteproc/imx_rproc.c >> @@ -186,7 +186,7 @@ static int imx_rproc_stop(struct rproc *rproc) >> } >> =20 >> static int imx_rproc_da_to_sys(struct imx_rproc *priv, u64 da, >> -=09=09=09 int len, u64 *sys) >> +=09=09=09 u64 len, u64 *sys) >> { >> =09const struct imx_rproc_dcfg *dcfg =3D priv->dcfg; >> =09int i; >> @@ -203,19 +203,19 @@ static int imx_rproc_da_to_sys(struct imx_rproc *p= riv, u64 >> da, >> =09=09} >> =09} >> =20 >> -=09dev_warn(priv->dev, "Translation failed: da =3D 0x%llx len =3D 0x%x\= n", >> +=09dev_warn(priv->dev, "Translation failed: da =3D 0x%llx len =3D 0x%ll= x\n", >> =09=09 da, len); >> =09return -ENOENT; >> } >> =20 >> -static void *imx_rproc_da_to_va(struct rproc *rproc, u64 da, int len) >> +static void *imx_rproc_da_to_va(struct rproc *rproc, u64 da, u64 len) >> { >> =09struct imx_rproc *priv =3D rproc->priv; >> =09void *va =3D NULL; >> =09u64 sys; >> =09int i; >> =20 >> -=09if (len <=3D 0) >> +=09if (len =3D=3D 0) >> =09=09return NULL; >> =20 >> =09/* >> @@ -235,7 +235,8 @@ static void *imx_rproc_da_to_va(struct rproc *rproc,= u64 da, >> int len) >> =09=09} >> =09} >> =20 >> -=09dev_dbg(&rproc->dev, "da =3D 0x%llx len =3D 0x%x va =3D 0x%p\n", da,= len, va); >> +=09dev_dbg(&rproc->dev, "da =3D 0x%llx len =3D 0x%llx va =3D 0x%p\n", >> +=09=09da, len, va); >> =20 >> =09return va; >> } >> diff --git a/drivers/remoteproc/keystone_remoteproc.c >> b/drivers/remoteproc/keystone_remoteproc.c >> index 5c4658f00b3d..466093f48814 100644 >> --- a/drivers/remoteproc/keystone_remoteproc.c >> +++ b/drivers/remoteproc/keystone_remoteproc.c >> @@ -246,7 +246,7 @@ static void keystone_rproc_kick(struct rproc *rproc,= int >> vqid) >> * can be used either by the remoteproc core for loading (when using ke= rnel >> * remoteproc loader), or by any rpmsg bus drivers. >> */ >> -static void *keystone_rproc_da_to_va(struct rproc *rproc, u64 da, int l= en) >> +static void *keystone_rproc_da_to_va(struct rproc *rproc, u64 da, u64 l= en) >> { >> =09struct keystone_rproc *ksproc =3D rproc->priv; >> =09void __iomem *va =3D NULL; >> @@ -255,7 +255,7 @@ static void *keystone_rproc_da_to_va(struct rproc *r= proc, >> u64 da, int len) >> =09size_t size; >> =09int i; >> =20 >> -=09if (len <=3D 0) >> +=09if (len =3D=3D 0) >> =09=09return NULL; >> =20 >> =09for (i =3D 0; i < ksproc->num_mems; i++) { >> diff --git a/drivers/remoteproc/qcom_q6v5_adsp.c >> b/drivers/remoteproc/qcom_q6v5_adsp.c >> index e953886b2eb7..7518e67a49e5 100644 >> --- a/drivers/remoteproc/qcom_q6v5_adsp.c >> +++ b/drivers/remoteproc/qcom_q6v5_adsp.c >> @@ -270,7 +270,7 @@ static int adsp_stop(struct rproc *rproc) >> =09return ret; >> } >> =20 >> -static void *adsp_da_to_va(struct rproc *rproc, u64 da, int len) >> +static void *adsp_da_to_va(struct rproc *rproc, u64 da, u64 len) >> { >> =09struct qcom_adsp *adsp =3D (struct qcom_adsp *)rproc->priv; >> =09int offset; >> diff --git a/drivers/remoteproc/qcom_q6v5_mss.c >> b/drivers/remoteproc/qcom_q6v5_mss.c >> index 471128a2e723..248febde6fc1 100644 >> --- a/drivers/remoteproc/qcom_q6v5_mss.c >> +++ b/drivers/remoteproc/qcom_q6v5_mss.c >> @@ -1148,7 +1148,7 @@ static int q6v5_stop(struct rproc *rproc) >> =09return 0; >> } >> =20 >> -static void *q6v5_da_to_va(struct rproc *rproc, u64 da, int len) >> +static void *q6v5_da_to_va(struct rproc *rproc, u64 da, u64 len) >> { >> =09struct q6v5 *qproc =3D rproc->priv; >> =09int offset; >> diff --git a/drivers/remoteproc/qcom_q6v5_pas.c >> b/drivers/remoteproc/qcom_q6v5_pas.c >> index db4b3c4bacd7..cf2cd609c90d 100644 >> --- a/drivers/remoteproc/qcom_q6v5_pas.c >> +++ b/drivers/remoteproc/qcom_q6v5_pas.c >> @@ -159,7 +159,7 @@ static int adsp_stop(struct rproc *rproc) >> =09return ret; >> } >> =20 >> -static void *adsp_da_to_va(struct rproc *rproc, u64 da, int len) >> +static void *adsp_da_to_va(struct rproc *rproc, u64 da, u64 len) >> { >> =09struct qcom_adsp *adsp =3D (struct qcom_adsp *)rproc->priv; >> =09int offset; >> diff --git a/drivers/remoteproc/qcom_q6v5_wcss.c >> b/drivers/remoteproc/qcom_q6v5_wcss.c >> index f93e1e4a1cc0..3a6b82a16961 100644 >> --- a/drivers/remoteproc/qcom_q6v5_wcss.c >> +++ b/drivers/remoteproc/qcom_q6v5_wcss.c >> @@ -406,7 +406,7 @@ static int q6v5_wcss_stop(struct rproc *rproc) >> =09return 0; >> } >> =20 >> -static void *q6v5_wcss_da_to_va(struct rproc *rproc, u64 da, int len) >> +static void *q6v5_wcss_da_to_va(struct rproc *rproc, u64 da, u64 len) >> { >> =09struct q6v5_wcss *wcss =3D rproc->priv; >> =09int offset; >> diff --git a/drivers/remoteproc/qcom_wcnss.c b/drivers/remoteproc/qcom_w= cnss.c >> index dc135754bb9c..f893219e45a8 100644 >> --- a/drivers/remoteproc/qcom_wcnss.c >> +++ b/drivers/remoteproc/qcom_wcnss.c >> @@ -287,7 +287,7 @@ static int wcnss_stop(struct rproc *rproc) >> =09return ret; >> } >> =20 >> -static void *wcnss_da_to_va(struct rproc *rproc, u64 da, int len) >> +static void *wcnss_da_to_va(struct rproc *rproc, u64 da, u64 len) >> { >> =09struct qcom_wcnss *wcnss =3D (struct qcom_wcnss *)rproc->priv; >> =09int offset; >> diff --git a/drivers/remoteproc/remoteproc_core.c >> b/drivers/remoteproc/remoteproc_core.c >> index 307df98347ba..9e6d3c6a60ee 100644 >> --- a/drivers/remoteproc/remoteproc_core.c >> +++ b/drivers/remoteproc/remoteproc_core.c >> @@ -185,7 +185,7 @@ EXPORT_SYMBOL(rproc_va_to_pa); >> * here the output of the DMA API for the carveouts, which should be mo= re >> * correct. >> */ >> -void *rproc_da_to_va(struct rproc *rproc, u64 da, int len) >> +void *rproc_da_to_va(struct rproc *rproc, u64 da, u64 len) >=20 > This function is exported, don't see any update in consequence... > references: > https://elixir.bootlin.com/linux/v5.6-rc1/ident/rproc_da_to_va > For instance the function rproc_trace_read use it. it quite strange that = my gcc > does not warns for the cast but i suppose that some could. Agreed, even if len should never have been a signed type since it can't be negative. I will try to fix all callers. > An indirect consequence is that the len field in rproc_mem_entry struct s= hould > probably been updated to u64 to be aligned. Ok, I will do that once we settle on the type of len. >=20 > I'm still wondering about the use of size_t instead,which seems more rati= onal > from my window. > So i you or Mathieu remember it was decided to use u64, please could remi= nd me > the arguments? I tried to find the notes of a meeting we had for OpenAMP but I did not fou= nd them. Anyway, the argument was coming from Tomas or someone else, (I can't remember) talking about a 32 bits CPU executing code on a 64 bits accelerat= or. In that case, the size_t type could fail due to being only 32bits on the ho= st CPU but larger than 4G. However, I can't say if it's a real usecase or not... All I can say is that keeping it open is probably better if one day somebody comes with such architecture. > As an alternative a check should be added for 32 bits processors to ensur= e that > the size is not higher than > its address range capability... Agreed. I was even thinking about a mecanism for remoteproc drivers to declare the = type of supported elfs files (such as EM_*, ELFCLASS* and other needed thing). Or should it be supported by overriding .sanity_check in drivers to reject elf64 for instance ? Since elf is a "specific format" and that rproc can support other formats, I did not want to add a specific elf_sanity_check field to rproc ops. Regards, Cl=C3=A9ment >=20 > Regards > Arnaud >=20 >> { >> =09struct rproc_mem_entry *carveout; >> =09void *ptr =3D NULL; >> diff --git a/drivers/remoteproc/remoteproc_internal.h >> b/drivers/remoteproc/remoteproc_internal.h >> index 493ef9262411..004867061721 100644 >> --- a/drivers/remoteproc/remoteproc_internal.h >> +++ b/drivers/remoteproc/remoteproc_internal.h >> @@ -50,7 +50,7 @@ void rproc_exit_sysfs(void); >> void rproc_free_vring(struct rproc_vring *rvring); >> int rproc_alloc_vring(struct rproc_vdev *rvdev, int i); >> =20 >> -void *rproc_da_to_va(struct rproc *rproc, u64 da, int len); >> +void *rproc_da_to_va(struct rproc *rproc, u64 da, u64 len); >> phys_addr_t rproc_va_to_pa(void *cpu_addr); >> int rproc_trigger_recovery(struct rproc *rproc); >> =20 >> diff --git a/drivers/remoteproc/st_slim_rproc.c >> b/drivers/remoteproc/st_slim_rproc.c >> index 04492fead3c8..fc01cd879b60 100644 >> --- a/drivers/remoteproc/st_slim_rproc.c >> +++ b/drivers/remoteproc/st_slim_rproc.c >> @@ -174,7 +174,7 @@ static int slim_rproc_stop(struct rproc *rproc) >> =09return 0; >> } >> =20 >> -static void *slim_rproc_da_to_va(struct rproc *rproc, u64 da, int len) >> +static void *slim_rproc_da_to_va(struct rproc *rproc, u64 da, u64 len) >> { >> =09struct st_slim_rproc *slim_rproc =3D rproc->priv; >> =09void *va =3D NULL; >> @@ -191,7 +191,7 @@ static void *slim_rproc_da_to_va(struct rproc *rproc= , u64 >> da, int len) >> =09=09} >> =09} >> =20 >> -=09dev_dbg(&rproc->dev, "da =3D 0x%llx len =3D 0x%x va =3D 0x%pK\n", >> +=09dev_dbg(&rproc->dev, "da =3D 0x%llx len =3D 0x%llx va =3D 0x%pK\n", >> =09=09da, len, va); >> =20 >> =09return va; >> diff --git a/drivers/remoteproc/wkup_m3_rproc.c >> b/drivers/remoteproc/wkup_m3_rproc.c >> index 3984e585c847..91485b467407 100644 >> --- a/drivers/remoteproc/wkup_m3_rproc.c >> +++ b/drivers/remoteproc/wkup_m3_rproc.c >> @@ -80,14 +80,14 @@ static int wkup_m3_rproc_stop(struct rproc *rproc) >> =09return 0; >> } >> =20 >> -static void *wkup_m3_rproc_da_to_va(struct rproc *rproc, u64 da, int le= n) >> +static void *wkup_m3_rproc_da_to_va(struct rproc *rproc, u64 da, u64 le= n) >> { >> =09struct wkup_m3_rproc *wkupm3 =3D rproc->priv; >> =09void *va =3D NULL; >> =09int i; >> =09u32 offset; >> =20 >> -=09if (len <=3D 0) >> +=09if (len =3D=3D 0) >> =09=09return NULL; >> =20 >> =09for (i =3D 0; i < WKUPM3_MEM_MAX; i++) { >> diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h >> index 16ad66683ad0..f84bd5fe0211 100644 >> --- a/include/linux/remoteproc.h >> +++ b/include/linux/remoteproc.h >> @@ -374,7 +374,7 @@ struct rproc_ops { >> =09int (*start)(struct rproc *rproc); >> =09int (*stop)(struct rproc *rproc); >> =09void (*kick)(struct rproc *rproc, int vqid); >> -=09void * (*da_to_va)(struct rproc *rproc, u64 da, int len); >> +=09void * (*da_to_va)(struct rproc *rproc, u64 da, u64 len); >> =09int (*parse_fw)(struct rproc *rproc, const struct firmware *fw); >> =09int (*handle_rsc)(struct rproc *rproc, u32 rsc_type, void *rsc, >> =09=09=09 int offset, int avail);