From: "Orzel, Michal" <michal.orzel@amd.com>
To: Julien Grall <julien@xen.org>,
Grygorii Strashko <grygorii_strashko@epam.com>,
"xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>
Cc: Stefano Stabellini <sstabellini@kernel.org>,
Bertrand Marquis <bertrand.marquis@arm.com>,
Volodymyr Babchuk <Volodymyr_Babchuk@epam.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Anthony PERARD <anthony.perard@vates.tech>,
Jan Beulich <jbeulich@suse.com>,
Roger Pau Monne <roger.pau@citrix.com>
Subject: Re: [XEN][PATCH 0/8] xen/arm64: make aarch32 support optional
Date: Wed, 23 Jul 2025 12:54:33 +0200 [thread overview]
Message-ID: <e35822cc-d8a0-49c1-a4b1-2765e0e6cb6c@amd.com> (raw)
In-Reply-To: <b968715b-20e5-4a63-8ad3-d4250e796c5d@xen.org>
On 23/07/2025 10:06, Julien Grall wrote:
>
>
> On 23/07/2025 08:58, Grygorii Strashko wrote:
>> From: Grygorii Strashko <grygorii_strashko@epam.com>
>>
>> Hi,
>
> Hi Grygorii,
>
>> Now Arm64 AArch32 guest support is always enabled and built-in while not
>> all Arm64 platforms supports AArch32 or this support might not be needed.
>
> I am not entirely sure I like the proliferation of using CONFIG_* for
> every single feature. This makes the testing a bit more complicated.
>
> Can you clarify what the goal with this patch?
AArch32 is used quite rarely in embedded systems. Also, in Armv9A it might only
be implemented at EL0 if at all. When focusing on safety certification, AArch32
related code in Xen leaves a gap in terms of coverage that cannot really be
justified in words. This leaves us with two options: either support it (lots of
additional testing, requirements and documents would be needed) or compile it out.
~Michal
next prev parent reply other threads:[~2025-07-23 10:55 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-23 7:58 [XEN][PATCH 0/8] xen/arm64: make aarch32 support optional Grygorii Strashko
2025-07-23 7:58 ` [XEN][PATCH 1/8] xen/arm: split set_domain_type() between arm64/arm32 Grygorii Strashko
2025-07-23 7:58 ` [XEN][PATCH 2/8] xen/arm: move vcpu_switch_to_aarch64_mode() in arch_vcpu_create() Grygorii Strashko
2025-07-23 9:16 ` Julien Grall
2025-07-23 10:19 ` Grygorii Strashko
2025-07-23 11:09 ` Julien Grall
2025-07-24 13:54 ` Grygorii Strashko
2025-07-23 11:12 ` Andrew Cooper
2025-07-23 7:58 ` [XEN][PATCH 3/8] xen/arm: move vcpu_switch_to_aarch64_mode() in arm64 Grygorii Strashko
2025-07-23 9:22 ` Julien Grall
2025-07-23 10:45 ` Grygorii Strashko
2025-07-23 7:58 ` [XEN][PATCH 4/8] xen/arm: split is_32bit/64bit_domain() between arm64/arm32 Grygorii Strashko
2025-07-23 8:32 ` Andrew Cooper
2025-07-23 7:58 ` [XEN][PATCH 6/8] xen/arm64: constify is_32/64bit_domain() macro for CONFIG_ARM64_AARCH32=n Grygorii Strashko
2025-07-23 8:37 ` Andrew Cooper
2025-07-23 7:58 ` [XEN][PATCH 5/8] xen/arm64: make aarch32 support optional Grygorii Strashko
2025-07-23 7:58 ` [XEN][PATCH 7/8] xen/arm: regs.h split subarch definitions between arm64/arm32 Grygorii Strashko
2025-07-23 7:58 ` [XEN][PATCH 8/8] xen/arm64: constify regs_mode_is_32bit macro for CONFIG_ARM64_AARCH32=n Grygorii Strashko
2025-07-23 8:06 ` [XEN][PATCH 0/8] xen/arm64: make aarch32 support optional Julien Grall
2025-07-23 10:54 ` Orzel, Michal [this message]
2025-07-23 11:48 ` Grygorii Strashko
2025-07-23 12:02 ` Julien Grall
2025-07-23 12:12 ` Grygorii Strashko
2025-07-24 14:24 ` Grygorii Strashko
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