From: Dirk Behme <dirk.behme@gmail.com>
To: Julien Grall <julien.grall@arm.com>,
Dirk Behme <dirk.behme@de.bosch.com>,
xen-devel@lists.xen.org,
Stefano Stabellini <sstabellini@kernel.org>
Subject: Re: [PATCH 2/2] xen: arm64: doc: Add some details about interrupt handling
Date: Mon, 25 Apr 2016 10:56:37 +0200 [thread overview]
Message-ID: <571DDBC5.5010105@gmail.com> (raw)
In-Reply-To: <57178373.60605@arm.com>
Hi Julien,
On 20.04.2016 15:26, Julien Grall wrote:
> Hello Dirk,
>
> On 19/04/16 06:59, Dirk Behme wrote:
>> In some mailing list discussion
>>
>> http://lists.xen.org/archives/html/xen-devel/2016-04/msg00214.html
>>
>> some details about the interrupt handling of Xen were given.
>> Add that so it's not forgotten.
>
> For your information, this is described on the wiki [1]. Although, not
> in the most obvious place.
>
> I would prefer to see this kind of documentation on the wiki page
> under "Porting Xen on a new SOC".
Anything like
http://wiki.xenproject.org/wiki?title=Xen_ARM_with_Virtualization_Extensions_whitepaper&diff=16710&oldid=11342
?
Best regards
Dirk
>>
>> Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com>
>> ---
>> Note: I'd be happy to move this to an other documentation file if
>> any other file fits better.
>>
>> docs/misc/arm/booting.txt | 15 +++++++++++++++
>> 1 file changed, 15 insertions(+)
>>
>> diff --git a/docs/misc/arm/booting.txt b/docs/misc/arm/booting.txt
>> index ffc9029..69b7d81 100644
>> --- a/docs/misc/arm/booting.txt
>> +++ b/docs/misc/arm/booting.txt
>> @@ -27,6 +27,21 @@ On ARM64 Linux it has to be ensured that the
>> Secure Configuration
>> Register has the HVC instructions enabled at EL1 and above
>> (SCR_EL3.HCE == 1).
>>
>> +
>> +Interrupt usage
>> +===============
>> +
>> +All interrupts are taken by Xen. The function do_IRQ in Xen will
>> +dispatch the IRQ either to a guest or call a Xen specific handler.
>> +
>> +Xen handles only a limited number of interrupt:
>> +* timers
>> +* UART
>> +* SMMU
>> +
>> +The rest is either routed to guests or blacklisted by Xen.
>> +
>> +
>> [1] linux/Documentation/arm/Booting
>> Latest version:
>> http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/arm/Booting
>>
>>
>>
>
> Regards,
>
> [1]
> http://wiki.xenproject.org/wiki/Xen_ARM_with_Virtualization_Extensions_whitepaper
>
>
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next prev parent reply other threads:[~2016-04-25 8:56 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-19 5:59 [PATCH 1/2] xen: arm64: doc: Add the requirement that SCR_EL3.HCE is enabled Dirk Behme
2016-04-19 5:59 ` [PATCH 2/2] xen: arm64: doc: Add some details about interrupt handling Dirk Behme
2016-04-20 13:26 ` Julien Grall
2016-04-25 8:56 ` Dirk Behme [this message]
2016-04-25 11:06 ` Julien Grall
2016-04-20 13:21 ` [PATCH 1/2] xen: arm64: doc: Add the requirement that SCR_EL3.HCE is enabled Julien Grall
2016-04-22 6:23 ` Dirk Behme
2016-04-22 9:16 ` Julien Grall
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