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Date: Wed, 2 Dec 2020 13:59:02 -0800 From: Randy Dunlap <rdunlap@...radead.org> To: "Enrico Weigelt, metux IT consult" <info@...ux.net>, linux-kernel@...r.kernel.org Cc: tglx@...utronix.de, mingo@...hat.com, bp@...en8.de, 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 v2 1/2] x86: make VMware support optional On 12/2/20 1:19 PM, Enrico Weigelt, metux IT consult wrote: > Make it possible to opt-out from VMware support, for minimized kernels > that never will be run under Vmware (eg. high-density virtualization > or embedded systems). > > Average distro kernel will leave it on, therefore default to y. > > Signed-off-by: Enrico Weigelt <info@...ux.net> > --- > arch/x86/Kconfig | 11 +++++++++++ > 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, 19 insertions(+), 4 deletions(-) > > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig > index f6946b81f74a..eff12460cb3c 100644 > --- a/arch/x86/Kconfig > +++ b/arch/x86/Kconfig > @@ -801,6 +801,17 @@ config X86_HV_CALLBACK_VECTOR > > source "arch/x86/xen/Kconfig" > > +config VMWARE_GUEST > + bool "VMware Guest support" > + default y > + help > + This option enables several optimizations for running under the > + VMware hypervisor. > + > + Disabling it saves a few kb, for stripped down kernels eg. in high kB or KiB or even KB, but not 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
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