From: Tamas K Lengyel Date: Wed, 27 May 2020 07:50:55 +0000 (+0200) Subject: x86/mem_sharing: gate enabling on cpu_has_vmx X-Git-Tag: 4.14.0-rc1~99 X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=b66e28226dd9df8a28101438f44c0a26d63b76fa;p=xen.git 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 --- 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)) )