From: Sumit Garg <sumit.garg@linaro.org>
To: Stuart Yoder <stuart.yoder@arm.com>
Cc: keyrings@vger.kernel.org, linux-integrity@vger.kernel.org,
linux-security-module@vger.kernel.org,
"tee-dev @ lists . linaro . org" <tee-dev@lists.linaro.org>,
Daniel Thompson <daniel.thompson@linaro.org>,
Jonathan Corbet <corbet@lwn.net>,
jejb@linux.ibm.com, Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Linux Doc Mailing List <linux-doc@vger.kernel.org>,
Mimi Zohar <zohar@linux.ibm.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
dhowells@redhat.com,
Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>,
Casey Schaufler <casey@schaufler-ca.com>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
"Serge E. Hallyn" <serge@hallyn.com>
Subject: Re: [Tee-dev] [RFC v2 2/6] tee: enable support to register kernel memory
Date: Fri, 9 Aug 2019 11:06:24 +0530 [thread overview]
Message-ID: <CAFA6WYPUEUVJqk9E2F6z9oBW3VpC+xeqqpY4YrU9KPL1s0DTyA@mail.gmail.com> (raw)
In-Reply-To: <99777010-db74-096a-ce1a-da30539d6fb5@arm.com>
On Fri, 9 Aug 2019 at 03:57, Stuart Yoder <stuart.yoder@arm.com> wrote:
>
>
>
> On 7/30/19 7:23 AM, Sumit Garg wrote:
>
> > @@ -264,7 +266,17 @@ struct tee_shm *tee_shm_register(struct tee_context *ctx, unsigned long addr,
> > goto err;
> > }
> >
> > - rc = get_user_pages_fast(start, num_pages, FOLL_WRITE, shm->pages);
> > + if (flags & TEE_SHM_USER_MAPPED) {
> > + rc = get_user_pages_fast(start, num_pages, FOLL_WRITE,
> > + shm->pages);
> > + } else {
> > + const struct kvec kiov = {
> > + .iov_base = (void *)start,
> > + .iov_len = PAGE_SIZE
> > + };
> > +
> > + rc = get_kernel_pages(&kiov, num_pages, 0, shm->pages);
>
> Passing a single kvec struct is temporary I assume? Because as currently
> written this will only work with num_pages==1.
>
Ah, thanks Stuart for pointing this out. It should rather be an array
of kvec struct. Will fix it in next version.
-Sumit
> Stuart
next prev parent reply other threads:[~2019-08-09 5:36 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-30 12:23 [RFC v2 0/6] Introduce TEE based Trusted Keys support Sumit Garg
2019-07-30 12:23 ` [RFC v2 1/6] tee: optee: allow kernel pages to register as shm Sumit Garg
2019-07-30 12:23 ` [RFC v2 2/6] tee: enable support to register kernel memory Sumit Garg
2019-08-08 22:26 ` [Tee-dev] " Stuart Yoder
2019-08-09 5:36 ` Sumit Garg [this message]
2019-07-30 12:23 ` [RFC v2 3/6] tee: add private login method for kernel clients Sumit Garg
2019-07-30 12:23 ` [RFC v2 4/6] KEYS: trusted: Introduce TEE based Trusted Keys Sumit Garg
2019-07-30 12:23 ` [RFC v2 5/6] doc: keys: Document usage of " Sumit Garg
2019-07-30 12:23 ` [RFC v2 6/6] MAINTAINERS: Add entry for " Sumit Garg
2019-07-31 7:11 ` [RFC v2 0/6] Introduce TEE based Trusted Keys support Janne Karhunen
2019-07-31 10:21 ` Janne Karhunen
2019-07-31 13:58 ` Sumit Garg
2019-08-01 6:21 ` Janne Karhunen
2019-08-01 7:40 ` Sumit Garg
2019-08-01 7:59 ` Janne Karhunen
2019-08-01 10:00 ` Sumit Garg
2019-08-01 10:40 ` Janne Karhunen
2019-07-31 10:26 ` Sumit Garg
2019-07-31 11:02 ` Janne Karhunen
2019-07-31 14:23 ` Sumit Garg
2019-08-01 6:36 ` Janne Karhunen
2019-08-01 6:50 ` [Tee-dev] " Rouven Czerwinski
2019-08-01 7:30 ` Janne Karhunen
2019-08-01 7:58 ` Sumit Garg
2019-08-01 8:30 ` Janne Karhunen
2019-08-01 10:27 ` Sumit Garg
2019-08-04 20:48 ` Jarkko Sakkinen
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