From: Jeremy Kerr <jk@ozlabs.org>
To: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>, linuxppc-dev@ozlabs.org
Cc: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>,
"Aneesh Kumar K . V" <aneesh.kumar@linux.vnet.ibm.com>
Subject: Re: [PATCH] powerpc/powernv/prd: Validate whether address to be mapped is part of system RAM
Date: Thu, 03 Oct 2019 09:47:31 +0800 [thread overview]
Message-ID: <2bb75b409a1159d5524be2d661e548e32fed152e.camel@ozlabs.org> (raw)
In-Reply-To: <20191002074856.15014-1-hegdevasant@linux.vnet.ibm.com>
Hi Vasant,
> Add check to validate whether requested page is part of system RAM
> or not before mmap() and error out if its not part of system RAM.
opal_prd_range_is_valid() will return false if the reserved memory range
does not have an ibm,prd-label property. If this you're getting invalid
memory mapped through the PRD interface, that means the device tree is
incorrectly describing those ranges.
Or am I missing something?
Cheers,
Jeremy
next prev parent reply other threads:[~2019-10-03 2:03 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-02 7:48 [PATCH] powerpc/powernv/prd: Validate whether address to be mapped is part of system RAM Vasant Hegde
2019-10-02 8:48 ` Vaidyanathan Srinivasan
2019-10-03 1:47 ` Jeremy Kerr [this message]
2019-10-03 4:51 ` Vasant Hegde
2019-10-03 4:56 ` Jeremy Kerr
2019-10-03 5:31 ` Vasant Hegde
2019-10-03 7:07 ` Jeremy Kerr
2019-10-03 10:29 ` Vaidyanathan Srinivasan
2019-10-04 3:27 ` Jeremy Kerr
2019-10-05 5:08 ` Vaidyanathan Srinivasan
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