linux-kernel - Re: [PATCH v1 0/8] xen/arm: vgic: Support 32-bit access for 64-bit register

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Message-ID: <56055FAE.70704@citrix.com>
Date:	Fri, 25 Sep 2015 15:52:30 +0100
From:	Julien Grall <julien.grall@...rix.com>
To:	<xen-devel@...ts.xenproject.org>
CC:	<linux-arm-kernel@...ts.infradead.org>, <ian.campbell@...rix.com>,
	<stefano.stabellini@...citrix.com>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1 0/8] xen/arm: vgic: Support 32-bit access for 64-bit
 register

Please ignore this version, I've sent it to the wrong mailing list.

Sorry for the noise.

On 25/09/15 15:50, Julien Grall wrote:
> Hi all,
> 
> This series aims to fix the 32-bit access on 64-bit register. Some guest
> OS such as FreeBSD and Linux (only in the ITS) use 32-bit access and will
> crash at boot time.
> 
> I took the opportunity to go further and optimize the way Xen is storing
> registers such as GICD_IPRIORITYR, GICD_ITARGETR and GICD_IROUTER.
> 
> Major changes in v2:
>     - Use the helpers in GICv2
>     - Optimize the assembly input for vgic_regN_* helpers on arm32
>     - Add support for sign-extension generically
>     - Store GICD_{IPRIORITYR, ITARGETSR, IROUTER} in a better way
> 
> For all the changes see in each patch.
> 
> A branch has been pushed based on the lastest staging:
> 
> git://xenbits.xen.org/people/julieng/xen-unstable.git branch gicv3-32bit-v1
> 
> Sincerely yours,
> 
> Julien Grall (8):
>   xen/arm: io: remove mmio_check_t typedef
>   xen/arm: io: Extend write/read handler to pass the register in
>     parameter
>   xen/arm: Support sign-extension for every read access
>   xen/arm: vgic: ctlr stores a 32-bit hardware register so use uint32_t
>   xen/arm: vgic: Optimize the way to store GICD_IPRIORITYR in the rank
>   xen/arm: vgic: Optimize the way to store the target vCPU in the rank
>   xen/arm: vgic: Introduce helpers to read/write/clear/set vGIC register
>     ...
>   xen/arm: vgic-v3: Support 32-bit access for 64-bit registers
> 
>  xen/arch/arm/io.c            |  42 +++++-
>  xen/arch/arm/vgic-v2.c       | 295 +++++++++++++++++++++---------------
>  xen/arch/arm/vgic-v3.c       | 352 +++++++++++++++++++++++++------------------
>  xen/arch/arm/vgic.c          |  72 ++++++++-
>  xen/arch/arm/vuart.c         |  16 +-
>  xen/include/asm-arm/domain.h |   2 +-
>  xen/include/asm-arm/mmio.h   |   5 +-
>  xen/include/asm-arm/vgic.h   | 148 +++++++++++++++---
>  8 files changed, 617 insertions(+), 315 deletions(-)
> 


-- 
Julien Grall
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