diff mbox series

[XEN,v2,15/15] x86/hvm: make AMD-V and Intel VT-x support configurable

Message ID 3ad7c0279da67e564713140fb5b247349cf4dccc.1715761386.git.Sergiy_Kibrik@epam.com (mailing list archive)
State Superseded
Headers show
Series x86: make cpu virtualization support configurable | expand

Commit Message

Sergiy Kibrik May 15, 2024, 9:28 a.m. UTC 
From: Xenia Ragiadakou <burzalodowa@gmail.com>

Provide the user with configuration control over the cpu virtualization support
in Xen by making SVM and VMX options user selectable.

To preserve the current default behavior, both options depend on HVM and
default to value of HVM.

To prevent users from unknowingly disabling virtualization support, make the
controls user selectable only if EXPERT is enabled.

No functional change intended.

Signed-off-by: Xenia Ragiadakou <burzalodowa@gmail.com>
Signed-off-by: Sergiy Kibrik <Sergiy_Kibrik@epam.com>
---
changes in v2:
 - remove dependency of build options IOMMU/AMD_IOMMU on VMX/SVM options
---
 xen/arch/x86/Kconfig | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

Comments

Stefano Stabellini May 16, 2024, 12:54 a.m. UTC | #1 
On Wed, 15 May 2024, Sergiy Kibrik wrote:
> From: Xenia Ragiadakou <burzalodowa@gmail.com>
> 
> Provide the user with configuration control over the cpu virtualization support
> in Xen by making SVM and VMX options user selectable.
> 
> To preserve the current default behavior, both options depend on HVM and
> default to value of HVM.
> 
> To prevent users from unknowingly disabling virtualization support, make the
> controls user selectable only if EXPERT is enabled.
> 
> No functional change intended.
> 
> Signed-off-by: Xenia Ragiadakou <burzalodowa@gmail.com>
> Signed-off-by: Sergiy Kibrik <Sergiy_Kibrik@epam.com>

Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Jan Beulich May 16, 2024, 12:17 p.m. UTC | #2 
On 16.05.2024 02:54, Stefano Stabellini wrote:
> On Wed, 15 May 2024, Sergiy Kibrik wrote:
>> From: Xenia Ragiadakou <burzalodowa@gmail.com>
>>
>> Provide the user with configuration control over the cpu virtualization support
>> in Xen by making SVM and VMX options user selectable.
>>
>> To preserve the current default behavior, both options depend on HVM and
>> default to value of HVM.
>>
>> To prevent users from unknowingly disabling virtualization support, make the
>> controls user selectable only if EXPERT is enabled.
>>
>> No functional change intended.
>>
>> Signed-off-by: Xenia Ragiadakou <burzalodowa@gmail.com>
>> Signed-off-by: Sergiy Kibrik <Sergiy_Kibrik@epam.com>
> 
> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>

Acked-by: Jan Beulich <jbeulich@suse.com>
diff mbox series

Patch

diff --git a/xen/arch/x86/Kconfig b/xen/arch/x86/Kconfig
index 2872b031a7..62621c7271 100644
--- a/xen/arch/x86/Kconfig
+++ b/xen/arch/x86/Kconfig
@@ -123,10 +123,24 @@  config HVM
 	  If unsure, say Y.
 
 config SVM
-	def_bool HVM
+	bool "AMD-V" if EXPERT
+	depends on HVM
+	default HVM
+	help
+	  Enables virtual machine extensions on platforms that implement the
+	  AMD Virtualization Technology (AMD-V).
+	  If your system includes a processor with AMD-V support, say Y.
+	  If in doubt, say Y.
 
 config VMX
-	def_bool HVM
+	bool "Intel VT-x" if EXPERT
+	depends on HVM
+	default HVM
+	help
+	  Enables virtual machine extensions on platforms that implement the
+	  Intel Virtualization Technology (Intel VT-x).
+	  If your system includes a processor with Intel VT-x support, say Y.
+	  If in doubt, say Y.
 
 config XEN_SHSTK
 	bool "Supervisor Shadow Stacks"