linux-kernel - Re: [PATCH 1/2] x86: make vmware support optional

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Message-ID: <0c0480af-bcf5-d7ba-9e76-d511e60f76ec@metux.net>
Date:   Wed, 2 Dec 2020 20:17:23 +0100
From:   "Enrico Weigelt, metux IT consult" <lkml@...ux.net>
To:     Borislav Petkov <bp@...en8.de>,
        "Enrico Weigelt, metux IT consult" <info@...ux.net>
Cc:     linux-kernel@...r.kernel.org, tglx@...utronix.de, mingo@...hat.com,
        x86@...nel.org, hpa@...or.com, dmitry.torokhov@...il.com,
        derek.kiernan@...inx.com, dragan.cvetic@...inx.com,
        richardcochran@...il.com, linux-hyperv@...r.kernel.org,
        linux-input@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH 1/2] x86: make vmware support optional

On 17.11.20 21:31, Borislav Petkov wrote:
> On Tue, Nov 17, 2020 at 09:23:07PM +0100, Enrico Weigelt, metux IT consult wrote:
>> Make it possible to opt-out from vmware support
> 
> Why?

Reducing the kernel size. Think of very high density virtualization
(w/ specially stripped-down workloads) or embedded systems.

For example, I'm running bare minimum kernels w/ only kvm and virtio
(not even pci, etc) in such scenarios.

Of course, that's nothing for an average distro, therefore leaving
default y.


--mtx


> 
> I can think of a couple of reasons but maybe yours might not be the one
> I'm thinking of.
> 
>> Signed-off-by: Enrico Weigelt, metux IT consult <info@...ux.net>
>> ---
>>  arch/x86/Kconfig                 | 7 +++++++
>>  arch/x86/kernel/cpu/Makefile     | 4 +++-
>>  arch/x86/kernel/cpu/hypervisor.c | 2 ++
>>  drivers/input/mouse/Kconfig      | 2 +-
>>  drivers/misc/Kconfig             | 2 +-
>>  drivers/ptp/Kconfig              | 2 +-
>>  6 files changed, 15 insertions(+), 4 deletions(-)
>>
>> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
>> index f6946b81f74a..c227c1fa0091 100644
>> --- a/arch/x86/Kconfig
>> +++ b/arch/x86/Kconfig
>> @@ -801,6 +801,13 @@ config X86_HV_CALLBACK_VECTOR
>>  
>>  source "arch/x86/xen/Kconfig"
>>  
>> +config VMWARE_GUEST
>> +	bool "Vmware Guest support"
>> +	default y
> 
> depends on HYPERVISOR_GUEST. The hyperv one too.
> 

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Enrico Weigelt, metux IT consult
Free software and Linux embedded engineering
info@...ux.net -- +49-151-27565287