Merge branch 'x86-paravirt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 paravirt update from Ingo Molnar:
 "Various paravirtualization related changes - the biggest one makes
  guest support optional via CONFIG_HYPERVISOR_GUEST"

* 'x86-paravirt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86, wakeup, sleep: Use pvops functions for changing GDT entries
  x86, xen, gdt: Remove the pvops variant of store_gdt.
  x86-32, gdt: Store/load GDT for ACPI S3 or hibernation/resume path is not needed
  x86-64, gdt: Store/load GDT for ACPI S3 or hibernate/resume path is not needed.
  x86: Make Linux guest support optional
  x86, Kconfig: Move PARAVIRT_DEBUG into the paravirt menu

1 files changed, 45 insertions, 44 deletions

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index e93ccb9b1cc..05b057dca4a 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -387,7 +387,7 @@ config X86_NUMACHIP
 
 config X86_VSMP
 	bool "ScaleMP vSMP"
-	select PARAVIRT_GUEST
+	select HYPERVISOR_GUEST
 	select PARAVIRT
 	depends on X86_64 && PCI
 	depends on X86_EXTENDED_PLATFORM
@@ -594,44 +594,17 @@ config SCHED_OMIT_FRAME_POINTER
 
 	  If in doubt, say "Y".
 
-menuconfig PARAVIRT_GUEST
-	bool "Paravirtualized guest support"
+menuconfig HYPERVISOR_GUEST
+	bool "Linux guest support"
 	---help---
-	  Say Y here to get to see options related to running Linux under
-	  various hypervisors.  This option alone does not add any kernel code.
+	  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.
+	  If you say N, all options in this submenu will be skipped and
+	  disabled, and Linux guest support won't be built in.
 
-if PARAVIRT_GUEST
-
-config PARAVIRT_TIME_ACCOUNTING
-	bool "Paravirtual steal time accounting"
-	select 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.
-
-source "arch/x86/xen/Kconfig"
-
-config KVM_GUEST
-	bool "KVM Guest support (including kvmclock)"
-	select PARAVIRT
-	select PARAVIRT
-	select PARAVIRT_CLOCK
-	default y if PARAVIRT_GUEST
-	---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
-
-source "arch/x86/lguest/Kconfig"
+if HYPERVISOR_GUEST
 
 config PARAVIRT
 	bool "Enable paravirtualization code"
@@ -641,6 +614,13 @@ config PARAVIRT
 	  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
@@ -654,17 +634,38 @@ config PARAVIRT_SPINLOCKS
 
 	  If you are unsure how to answer this question, answer N.
 
-config PARAVIRT_CLOCK
-	bool
+source "arch/x86/xen/Kconfig"
 
-endif
+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 PARAVIRT_DEBUG
-	bool "paravirt-ops debugging"
-	depends on PARAVIRT && DEBUG_KERNEL
+source "arch/x86/lguest/Kconfig"
+
+config PARAVIRT_TIME_ACCOUNTING
+	bool "Paravirtual steal time accounting"
+	depends on PARAVIRT
+	default n
 	---help---
-	  Enable to debug paravirt_ops internals.  Specifically, BUG if
-	  a paravirt_op is missing when it is called.
+	  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