From: Borislav Petkov <bp@xxxxxxx>
Put all config options needed to run Linux as a guest behind a
CONFIG_HYPERVISOR_GUEST menu so that they don't get built-in by default
but selected by the user.
While at it, adjust text to changes, remove redundant select.
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
---
arch/x86/Kconfig | 20 ++++++++++----------
arch/x86/include/asm/hypervisor.h | 12 ++++++++----
arch/x86/kernel/cpu/Makefile | 3 ++-
3 files changed, 20 insertions(+), 15 deletions(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index fb3f76510be1..7a91a980745d 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -383,7 +383,7 @@ 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
@@ -611,15 +611,16 @@ config KVMTOOL_TEST_ENABLE
select NET_9P
select NET_9P_VIRTIO
-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 hypervisors.
+ 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
+if HYPERVISOR_GUEST
config PARAVIRT_TIME_ACCOUNTING
bool "Paravirtual steal time accounting"
@@ -638,9 +639,8 @@ 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
+ default y
---help---
This option enables various optimizations for running under the KVM
hypervisor. It includes a paravirtualized clock, so that instead
@@ -681,7 +681,7 @@ config PARAVIRT_DEBUG
Enable to debug paravirt_ops internals. Specifically, BUG if
a paravirt_op is missing when it is called.
-endif #PARAVIRT_GUEST
+endif #HYPERVISOR_GUEST
config NO_BOOTMEM
def_bool y
diff --git a/arch/x86/include/asm/hypervisor.h b/arch/x86/include/asm/hypervisor.h
index b518c7509933..cd06ed8733cb 100644
--- a/arch/x86/include/asm/hypervisor.h
+++ b/arch/x86/include/asm/hypervisor.h
@@ -23,9 +23,6 @@
#include <asm/kvm_para.h>
#include <asm/xen/hypervisor.h>
-extern void init_hypervisor(struct cpuinfo_x86 *c);
-extern void init_hypervisor_platform(void);
-
/*
* x86 hypervisor information
*/
@@ -60,4 +57,11 @@ static inline bool hypervisor_x2apic_available(void)
return false;
}
-#endif
+#ifdef CONFIG_PARAVIRT
+extern void init_hypervisor(struct cpuinfo_x86 *c);
+extern void init_hypervisor_platform(void);
+#else
+static inline void init_hypervisor(struct cpuinfo_x86 *c) { }
+static inline void init_hypervisor_platform(void) { }
+#endif /* CONFIG_PARAVIRT */
+#endif /* _ASM_X86_HYPERVISOR_H */
diff --git a/arch/x86/kernel/cpu/Makefile b/arch/x86/kernel/cpu/Makefile
index a0e067d3d96c..8d04c7cd7cd3 100644
--- a/arch/x86/kernel/cpu/Makefile
+++ b/arch/x86/kernel/cpu/Makefile
@@ -14,7 +14,6 @@ CFLAGS_common.o := $(nostackp)
obj-y := intel_cacheinfo.o scattered.o topology.o
obj-y += proc.o capflags.o powerflags.o common.o
-obj-y += vmware.o hypervisor.o mshyperv.o
obj-y += rdrand.o
obj-y += match.o
@@ -42,6 +41,8 @@ obj-$(CONFIG_MTRR) += mtrr/
obj-$(CONFIG_X86_LOCAL_APIC) += perfctr-watchdog.o perf_event_amd_ibs.o
+obj-$(CONFIG_PARAVIRT) += vmware.o hypervisor.o mshyperv.o
+
quiet_cmd_mkcapflags = MKCAP $@
cmd_mkcapflags = $(PERL) $(srctree)/$(src)/mkcapflags.pl $< $@
--
1.8.1.rc3
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