From b66e28226dd9df8a28101438f44c0a26d63b76fa Mon Sep 17 00:00:00 2001 From: Tamas K Lengyel Date: Wed, 27 May 2020 09:50:55 +0200 Subject: [PATCH] x86/mem_sharing: gate enabling on cpu_has_vmx It is unclear whether mem_sharing was ever made to work on other architectures but at this time the only verified platform for it is vmx. No plans to support or maintain it on other architectures. Make this explicit by checking during initialization. Signed-off-by: Tamas K Lengyel Reviewed-by: Wei Liu --- xen/arch/x86/mm/mem_sharing.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/xen/arch/x86/mm/mem_sharing.c b/xen/arch/x86/mm/mem_sharing.c index 7271e5c90b..19922ab5d1 100644 --- a/xen/arch/x86/mm/mem_sharing.c +++ b/xen/arch/x86/mm/mem_sharing.c @@ -1444,7 +1444,7 @@ static inline int mem_sharing_control(struct domain *d, bool enable, { if ( enable ) { - if ( unlikely(!is_hvm_domain(d)) ) + if ( unlikely(!is_hvm_domain(d) || !cpu_has_vmx) ) return -EOPNOTSUPP; if ( unlikely(!hap_enabled(d)) ) -- 2.30.2