From: Randy Dunlap <rdunlap@infradead.org>
To: "Enrico Weigelt, metux IT consult" <info@metux.net>,
linux-kernel@vger.kernel.org
Cc: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
x86@kernel.org, hpa@zytor.com, dmitry.torokhov@gmail.com,
derek.kiernan@xilinx.com, dragan.cvetic@xilinx.com,
richardcochran@gmail.com, linux-hyperv@vger.kernel.org,
linux-input@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: [PATCH v2 2/2] x86: make Hyper-V support optional
Date: Wed, 2 Dec 2020 13:58:52 -0800 [thread overview]
Message-ID: <e898aa1b-84e8-9898-c834-48c599be7ffd@infradead.org> (raw)
In-Reply-To: <20201202211949.17730-2-info@metux.net>
On 12/2/20 1:19 PM, Enrico Weigelt, metux IT consult wrote:
> Make it possible to opt-out from Hyper-V support, for minimized kernels
> that never will by run under Hyper-V. (eg. high-density virtualization
> or embedded systems)
>
> Average distro kernel will leave it on, therefore default to y.
>
> Signed-off-by: Enrico Weigelt <info@metux.net>
> ---
> arch/x86/Kconfig | 11 +++++++++++
> arch/x86/kernel/cpu/Makefile | 4 ++--
> arch/x86/kernel/cpu/hypervisor.c | 2 ++
> drivers/hv/Kconfig | 2 +-
> 4 files changed, 16 insertions(+), 3 deletions(-)
>
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index eff12460cb3c..57d20591d6ee 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -812,6 +812,17 @@ config VMWARE_GUEST
> density virtualization or embedded systems running (para)virtualized
> workloads.
>
> +config HYPERV_GUEST
> + bool "Hyper-V Guest support"
> + default y
> + help
> + This option enables several optimizations for running under the
> + Hyper-V hypervisor.
> +
> + Disabling it saves a few kb, for stripped down kernels eg. in high
kB, e.g.
> + density virtualization or embedded systems running (para)virtualized
> + workloads.
> +
> config KVM_GUEST
> bool "KVM Guest support (including kvmclock)"
> depends on PARAVIRT
--
~Randy
next prev parent reply other threads:[~2020-12-02 21:59 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-02 21:19 [PATCH v2 1/2] x86: make VMware support optional Enrico Weigelt, metux IT consult
2020-12-02 21:19 ` [PATCH v2 2/2] x86: make Hyper-V " Enrico Weigelt, metux IT consult
2020-12-02 21:58 ` Randy Dunlap [this message]
2020-12-02 21:59 ` [PATCH v2 1/2] x86: make VMware " Randy Dunlap
2020-12-03 7:46 ` Borislav Petkov
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