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Message-Id: <20140114001139.B5AF0FF4@viggo.jf.intel.com> Date: Mon, 13 Jan 2014 16:11:39 -0800 From: Dave Hansen <dave@...1.net> To: linux-kernel@...r.kernel.org Cc: x86@...nel.org, Dave Hansen <dave@...1.net>, bp@...e.de, dtor@...are.com, kys@...rosoft.com, haiyangz@...rosoft.com, agraf@...e.de, gleb@...hat.com, pbonzini@...hat.com Subject: [PATCH 2/2] x86 Kconfig: move guest-side options under "Virtualization" We now have two groups of options in "Virtualization": one for host-side support and a matching one for guest-side stuff. We do not need separate submenus for this stuff since there are so few options. Signed-off-by: Dave Hansen <dave.hansen@...ux.intel.com> Cc: Borislav Petkov <bp@...e.de> Cc: Dmitry Torokhov <dtor@...are.com> Cc: K. Y. Srinivasan <kys@...rosoft.com> Cc: Haiyang Zhang <haiyangz@...rosoft.com> Cc: Alexander Graf <agraf@...e.de> Cc: Gleb Natapov <gleb@...hat.com> Cc: Paolo Bonzini <pbonzini@...hat.com> --- linux.git-davehans/arch/x86/Kconfig | 83 ---------------------------- linux.git-davehans/arch/x86/Kconfig.virt | 85 +++++++++++++++++++++++++++++ linux.git-davehans/arch/x86/kvm/Kconfig | 2 linux.git-davehans/arch/x86/lguest/Kconfig | 1 4 files changed, 85 insertions(+), 86 deletions(-) diff -puN arch/x86/Kconfig~x86-Kconfig-move-paravirt-under-virtualization-really arch/x86/Kconfig --- linux.git/arch/x86/Kconfig~x86-Kconfig-move-paravirt-under-virtualization-really 2014-01-13 16:10:05.721497873 -0800 +++ linux.git-davehans/arch/x86/Kconfig 2014-01-13 16:10:05.758499543 -0800 @@ -1018,89 +1018,6 @@ config X86_ES7000 Support for Unisys ES7000 systems. Say 'Y' here if this kernel is supposed to run on an IA32-based Unisys ES7000 system. -menuconfig HYPERVISOR_GUEST - bool "Linux guest support" - ---help--- - Say Y here to enable options for running Linux under various hyper- - visors. This option enables basic hypervisor detection and platform - setup. - - If you say N, all options in this submenu will be skipped and - disabled, and Linux guest support won't be built in. - -if HYPERVISOR_GUEST - -config PARAVIRT - bool "Enable paravirtualization code" - ---help--- - This changes the kernel so it can modify itself when it is run - under a hypervisor, potentially improving performance significantly - over full virtualization. However, when run without a hypervisor - the kernel is theoretically slower and slightly larger. - -config PARAVIRT_DEBUG - bool "paravirt-ops debugging" - depends on PARAVIRT && DEBUG_KERNEL - ---help--- - Enable to debug paravirt_ops internals. Specifically, BUG if - a paravirt_op is missing when it is called. - -config PARAVIRT_SPINLOCKS - bool "Paravirtualization layer for spinlocks" - depends on PARAVIRT && SMP - select UNINLINE_SPIN_UNLOCK - ---help--- - Paravirtualized spinlocks allow a pvops backend to replace the - spinlock implementation with something virtualization-friendly - (for example, block the virtual CPU rather than spinning). - - It has a minimal impact on native kernels and gives a nice performance - benefit on paravirtualized KVM / Xen kernels. - - If you are unsure how to answer this question, answer Y. - -source "arch/x86/xen/Kconfig" - -config KVM_GUEST - bool "KVM Guest support (including kvmclock)" - depends on PARAVIRT - select PARAVIRT_CLOCK - default y - ---help--- - This option enables various optimizations for running under the KVM - hypervisor. It includes a paravirtualized clock, so that instead - of relying on a PIT (or probably other) emulation by the - underlying device model, the host provides the guest with - timing infrastructure such as time of day, and system time - -config KVM_DEBUG_FS - bool "Enable debug information for KVM Guests in debugfs" - depends on KVM_GUEST && DEBUG_FS - default n - ---help--- - This option enables collection of various statistics for KVM guest. - Statistics are displayed in debugfs filesystem. Enabling this option - may incur significant overhead. - -source "arch/x86/lguest/Kconfig" - -config PARAVIRT_TIME_ACCOUNTING - bool "Paravirtual steal time accounting" - depends on PARAVIRT - default n - ---help--- - Select this option to enable fine granularity task steal time - accounting. Time spent executing other tasks in parallel with - the current vCPU is discounted from the vCPU power. To account for - that, there can be a small performance impact. - - If in doubt, say N here. - -config PARAVIRT_CLOCK - bool - -endif #HYPERVISOR_GUEST - config NO_BOOTMEM def_bool y diff -puN arch/x86/Kconfig.virt~x86-Kconfig-move-paravirt-under-virtualization-really arch/x86/Kconfig.virt --- linux.git/arch/x86/Kconfig.virt~x86-Kconfig-move-paravirt-under-virtualization-really 2014-01-13 16:10:05.722497918 -0800 +++ linux.git-davehans/arch/x86/Kconfig.virt 2014-01-13 16:10:35.730852434 -0800 @@ -1,3 +1,5 @@ +# No menu items in here, just common config variables: +source "virt/kvm/Kconfig" menu "Virtualization" @@ -22,4 +24,87 @@ source drivers/lguest/Kconfig endif # HYPERVISOR_HOST +config HYPERVISOR_GUEST + bool "Guest-Side Features (Linux running under a Hypervisor)" + ---help--- + Say Y here to enable options for running Linux under various hyper- + visors. This option enables basic hypervisor detection and platform + setup. + + If you say N, all options in this submenu will be skipped and + disabled, and Linux guest support won't be built in. + +if HYPERVISOR_GUEST + +config PARAVIRT + bool "Enable paravirtualization code" + ---help--- + This changes the kernel so it can modify itself when it is run + under a hypervisor, potentially improving performance significantly + over full virtualization. However, when run without a hypervisor + the kernel is theoretically slower and slightly larger. + +config PARAVIRT_DEBUG + bool "paravirt-ops debugging" + depends on PARAVIRT && DEBUG_KERNEL + ---help--- + Enable to debug paravirt_ops internals. Specifically, BUG if + a paravirt_op is missing when it is called. + +config PARAVIRT_SPINLOCKS + bool "Paravirtualization layer for spinlocks" + depends on PARAVIRT && SMP + select UNINLINE_SPIN_UNLOCK + ---help--- + Paravirtualized spinlocks allow a pvops backend to replace the + spinlock implementation with something virtualization-friendly + (for example, block the virtual CPU rather than spinning). + + It has a minimal impact on native kernels and gives a nice performance + benefit on paravirtualized KVM / Xen kernels. + + If you are unsure how to answer this question, answer Y. + +source "arch/x86/xen/Kconfig" + +config KVM_GUEST + bool "KVM Guest support (including kvmclock)" + depends on PARAVIRT + select PARAVIRT_CLOCK + default y + ---help--- + This option enables various optimizations for running under the KVM + hypervisor. It includes a paravirtualized clock, so that instead + of relying on a PIT (or probably other) emulation by the + underlying device model, the host provides the guest with + timing infrastructure such as time of day, and system time + +config KVM_DEBUG_FS + bool "Enable debug information for KVM Guests in debugfs" + depends on KVM_GUEST && DEBUG_FS + default n + ---help--- + This option enables collection of various statistics for KVM guest. + Statistics are displayed in debugfs filesystem. Enabling this option + may incur significant overhead. + +source "arch/x86/lguest/Kconfig" + +config PARAVIRT_TIME_ACCOUNTING + bool "Paravirtual steal time accounting" + depends on PARAVIRT + default n + ---help--- + Select this option to enable fine granularity task steal time + accounting. Time spent executing other tasks in parallel with + the current vCPU is discounted from the vCPU power. To account for + that, there can be a small performance impact. + + If in doubt, say N here. + +config PARAVIRT_CLOCK + bool + +endif # HYPERVISOR_GUEST + endmenu # "Virtualization" diff -puN arch/x86/lguest/Kconfig~x86-Kconfig-move-paravirt-under-virtualization-really arch/x86/lguest/Kconfig --- linux.git/arch/x86/lguest/Kconfig~x86-Kconfig-move-paravirt-under-virtualization-really 2014-01-13 16:10:05.724498009 -0800 +++ linux.git-davehans/arch/x86/lguest/Kconfig 2014-01-13 16:10:05.759499589 -0800 @@ -2,7 +2,6 @@ config LGUEST_GUEST bool "Lguest guest support" depends on X86_32 && PARAVIRT select TTY - select VIRTUALIZATION select VIRTIO select VIRTIO_CONSOLE help diff -puN arch/x86/kvm/Kconfig~x86-Kconfig-move-paravirt-under-virtualization-really arch/x86/kvm/Kconfig --- linux.git/arch/x86/kvm/Kconfig~x86-Kconfig-move-paravirt-under-virtualization-really 2014-01-13 16:10:05.729498234 -0800 +++ linux.git-davehans/arch/x86/kvm/Kconfig 2014-01-13 16:10:05.760499634 -0800 @@ -2,8 +2,6 @@ # KVM configuration # -source "virt/kvm/Kconfig" - config KVM tristate "Kernel-based Virtual Machine (KVM) support" depends on HAVE_KVM _ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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