[xen staging] x86: introduce AMD-V and Intel VT-x Kconfig options

[patchbot@xxxxxxx]

commit c1a13ad302e6da97fc426d37a770fcc6b68ba5d6
Author:     Xenia Ragiadakou <burzalodowa@xxxxxxxxx>
AuthorDate: Thu Aug 1 13:53:37 2024 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Thu Aug 1 13:53:37 2024 +0200

    x86: introduce AMD-V and Intel VT-x Kconfig options
    
    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@xxxxxxxxx>
    Signed-off-by: Sergiy Kibrik <Sergiy_Kibrik@xxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 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 --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
--
generated by git-patchbot for /home/xen/git/xen.git#staging