From: "Jürgen Groß" <jgross@suse.com>
To: Simon Leiner <simon@leiner.me>, Jan Beulich <jbeulich@suse.com>,
Stefano Stabellini <sstabellini@kernel.org>
Cc: xen-devel@lists.xenproject.org, julien@xen.org
Subject: Re: [PATCH 2/2] arm/xen: Add misuse warning to virt_to_gfn
Date: Wed, 26 Aug 2020 09:59:30 +0200 [thread overview]
Message-ID: <bf17ac65-6182-d426-a6d6-7dac0f286dc7@suse.com> (raw)
In-Reply-To: <d5db3e9a-2d5e-ef20-2516-c014d25e9e1c@leiner.me>
On 26.08.20 09:50, Simon Leiner wrote:
> On 26.08.20 08:20, Jan Beulich wrote:
>> Hmm, to me __phys_to_virt() and __virt_to_phys_nodebug() give
>> the impression that they're just linear transformations of the
>> address, which would seem to suggest there's a pre-determined
>> address range used for the direct map.
>
> From eyeballing the kernel code, it seems like __is_lm_address() is
> suitable for such a check, especially since it is also used in
> __virt_to_phys() (the one in arch/arm64/mm/physaddr.c).
This seems to be an Arm specific function.
virt_addr_valid() seems to be a good fit.
Juergen
next prev parent reply other threads:[~2020-08-26 7:59 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Aw: [Linux] [ARM] Granting memory obtained from the DMA API>
2020-08-25 9:31 ` [PATCH 1/2] xen/xenbus: Fix granting of vmalloc'd memory Simon Leiner
2020-08-25 9:31 ` [PATCH 2/2] arm/xen: Add misuse warning to virt_to_gfn Simon Leiner
2020-08-25 12:16 ` Jan Beulich
2020-08-25 23:48 ` Stefano Stabellini
2020-08-26 6:20 ` Jan Beulich
2020-08-26 7:50 ` Simon Leiner
2020-08-26 7:59 ` Jürgen Groß [this message]
2020-08-26 8:14 ` Simon Leiner
2020-08-26 8:27 ` Jürgen Groß
2020-08-26 8:30 ` Simon Leiner
2020-08-25 23:58 ` Stefano Stabellini
2020-08-26 18:37 ` Julien Grall
2020-08-27 5:21 ` Jürgen Groß
2020-08-27 8:24 ` Julien Grall
2020-08-27 8:35 ` Jürgen Groß
2020-08-27 16:04 ` Stefano Stabellini
2020-08-25 23:55 ` [PATCH 1/2] xen/xenbus: Fix granting of vmalloc'd memory Stefano Stabellini
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