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[XEN][PATCH] x86/hvm: mem_sharing: add dependency from CONFIG_INTEL_VMX
- To: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Grygorii Strashko <grygorii_strashko@xxxxxxxx>
- Date: Thu, 25 Sep 2025 19:56:07 +0000
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- Cc: Grygorii Strashko <grygorii_strashko@xxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Alejandro Vallejo <alejandro.garciavallejo@xxxxxxx>
- Delivery-date: Thu, 25 Sep 2025 19:56:28 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Thread-index: AQHcLlZvmNyA5ChnWE+hK8ZrAp/wbA==
- Thread-topic: [XEN][PATCH] x86/hvm: mem_sharing: add dependency from CONFIG_INTEL_VMX
From: Grygorii Strashko <grygorii_strashko@xxxxxxxx>
According to the commit b66e28226dd9 ("x86/mem_sharing: gate enabling on
cpu_has_vmx") the Xen memory sharing support is only possible on platforms
with "Intel VT-x" (INTEL_VMX=y) enabled.
The same commit is also added runtime check for "cpu_has_vmx" in
mem_sharing_control() which blocks access to XENMEM_sharing_ops if
!cpu_has_vmx.
Hence add dependency from INTEL_VMX for MEM_SHARING Kconfig option.
Signed-off-by: Grygorii Strashko <grygorii_strashko@xxxxxxxx>
---
It has took me a time (including digging deep in git history) to understand
presence of this dependency, so this patch. Hope it helps other people and they
will not need waste their time digging.
xen/arch/x86/hvm/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/xen/arch/x86/hvm/Kconfig b/xen/arch/x86/hvm/Kconfig
index aed799fcb9c2..d62492d2043c 100644
--- a/xen/arch/x86/hvm/Kconfig
+++ b/xen/arch/x86/hvm/Kconfig
@@ -79,5 +79,6 @@ config MEM_PAGING
config MEM_SHARING
bool "Xen memory sharing support (UNSUPPORTED)" if UNSUPPORTED
+ depends on INTEL_VMX
endif
--
2.34.1
|
