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[XEN,v5,01/13] x86: introduce AMD-V and Intel VT-x Kconfig options

Message ID eff6569e9499f49f0bbaf3dbd4589e47b65950e5.1722333634.git.Sergiy_Kibrik@epam.com (mailing list archive)
State Superseded
Headers show
Series x86: make CPU virtualisation support configurable | expand

Commit Message

Sergiy Kibrik July 30, 2024, 10:16 a.m. UTC 
From: Xenia Ragiadakou <burzalodowa@gmail.com>

Introduce two new Kconfig options, AMD_SVM and INTEL_VMX, to allow code
specific to each virtualization technology to be separated and, when not
required, stripped.
CONFIG_AMD_SVM will be used to enable virtual machine extensions on platforms
that implement the AMD Virtualization Technology (AMD-V).
CONFIG_INTEL_VMX will be used to enable virtual machine extensions on platforms
that implement the Intel Virtualization Technology (Intel VT-x).

Both features depend on HVM support.

Since, at this point, disabling any of them would cause Xen to not compile,
the options are enabled by default if HVM and are not selectable by the user.

No functional change intended.

Signed-off-by: Xenia Ragiadakou <burzalodowa@gmail.com>
Signed-off-by: Sergiy Kibrik <Sergiy_Kibrik@epam.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
---
changes in v5:
 - change kconfig option name SVM/VMX -> AMD_SVM/INTEL_VMX
changes in v3:
 - tag added
changes in v2:
 - simplify kconfig expression to def_bool HVM
 - keep file list in Makefile in alphabetical order
---
 xen/arch/x86/Kconfig         | 6 ++++++
 xen/arch/x86/hvm/Makefile    | 4 ++--
 xen/arch/x86/mm/Makefile     | 3 ++-
 xen/arch/x86/mm/hap/Makefile | 2 +-
 4 files changed, 11 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/xen/arch/x86/Kconfig b/xen/arch/x86/Kconfig
index 7e03e4bc55..fa5405e0d3 100644
--- a/xen/arch/x86/Kconfig
+++ b/xen/arch/x86/Kconfig
@@ -122,6 +122,12 @@  config HVM
 
 	  If unsure, say Y.
 
+config AMD_SVM
+	def_bool HVM
+
+config INTEL_VMX
+	def_bool HVM
+
 config XEN_SHSTK
 	bool "Supervisor Shadow Stacks"
 	depends on HAS_AS_CET_SS
diff --git a/xen/arch/x86/hvm/Makefile b/xen/arch/x86/hvm/Makefile
index 3464191544..4c1fa5c6c2 100644
--- a/xen/arch/x86/hvm/Makefile
+++ b/xen/arch/x86/hvm/Makefile
@@ -1,5 +1,5 @@ 
-obj-y += svm/
-obj-y += vmx/
+obj-$(CONFIG_AMD_SVM) += svm/
+obj-$(CONFIG_INTEL_VMX) += vmx/
 obj-y += viridian/
 
 obj-y += asid.o
diff --git a/xen/arch/x86/mm/Makefile b/xen/arch/x86/mm/Makefile
index 0803ac9297..52c5abdfee 100644
--- a/xen/arch/x86/mm/Makefile
+++ b/xen/arch/x86/mm/Makefile
@@ -10,6 +10,7 @@  obj-$(CONFIG_MEM_SHARING) += mem_sharing.o
 obj-$(CONFIG_HVM) += nested.o
 obj-$(CONFIG_HVM) += p2m.o
 obj-y += p2m-basic.o
-obj-$(CONFIG_HVM) += p2m-ept.o p2m-pod.o p2m-pt.o
+obj-$(CONFIG_INTEL_VMX) += p2m-ept.o
+obj-$(CONFIG_HVM) += p2m-pod.o p2m-pt.o
 obj-y += paging.o
 obj-y += physmap.o
diff --git a/xen/arch/x86/mm/hap/Makefile b/xen/arch/x86/mm/hap/Makefile
index 8ef54b1faa..67c29b2162 100644
--- a/xen/arch/x86/mm/hap/Makefile
+++ b/xen/arch/x86/mm/hap/Makefile
@@ -3,4 +3,4 @@  obj-y += guest_walk_2.o
 obj-y += guest_walk_3.o
 obj-y += guest_walk_4.o
 obj-y += nested_hap.o
-obj-y += nested_ept.o
+obj-$(CONFIG_INTEL_VMX) += nested_ept.o