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Re: [PATCH] x86: Don't allow HVM alongside PV_SHIM_EXCLUSIVE
- To: Alejandro Vallejo <alejandro.garciavallejo@xxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Mon, 21 Jul 2025 08:28:21 +0200
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- Cc: Roger Pau Monné <roger.pau@xxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Mon, 21 Jul 2025 06:28:27 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 18.07.2025 18:12, Alejandro Vallejo wrote:
> On Fri Jul 18, 2025 at 5:41 PM CEST, Andrew Cooper wrote:
>> On 18/07/2025 4:12 pm, Alejandro Vallejo wrote:
>>> Otherwise compile-time errors ensue. It's a nonsensical configuration,
>>> but it's supriously triggered in randconfig jobs.
>>>
>>> Fixes: 8b5b49ceb3d9("x86: don't include domctl and alike in shim-excl...")
>>> Signed-off-by: Alejandro Vallejo <alejandro.garciavallejo@xxxxxxx>
>>> ---
>>> xen/arch/x86/hvm/Kconfig | 1 +
>>> 1 file changed, 1 insertion(+)
>>>
>>> diff --git a/xen/arch/x86/hvm/Kconfig b/xen/arch/x86/hvm/Kconfig
>>> index b903764bda..f57a87bca3 100644
>>> --- a/xen/arch/x86/hvm/Kconfig
>>> +++ b/xen/arch/x86/hvm/Kconfig
>>> @@ -1,6 +1,7 @@
>>> menuconfig HVM
>>> bool "HVM support"
>>> default !PV_SHIM
>>> + depends on !PV_SHIM_EXCLUSIVE
>>> select COMPAT
>>> select IOREQ_SERVER
>>> select MEM_ACCESS_ALWAYS_ON
>>
>> I deeply regret not nacking this originally and blocking the patch you
>> listed as fixed.
>>
>> This depends was explicitly reverted in 568f806cba4c because it breaks a
>> lot of things, notably `make allyesconfig`.
>>
>> We're going to need to find a different way to fix RANDCONFIG.
>>
>> ~Andrew
>
> It can be done the other way around. PV_SHIM_EXCLUSIVE depending on
> !CONFIG_HVM,
> but that won't help with allyesconfig.
And it wouldn't be right either, in the model we're trying to follow now.
Jan
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