[Xen-devel] [PATCH v10 32/38] xen/x86: Remove SME feature in PV guests

[Tom Lendacky <thomas.lendacky@xxxxxxx>]

Xen does not currently support SME for PV guests. Clear the SME CPU
capability in order to avoid any ambiguity.

Cc: <xen-devel@xxxxxxxxxxxxx>
Cc: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
Cc: Juergen Gross <jgross@xxxxxxxx>
Reviewed-by: Borislav Petkov <bp@xxxxxxx>
Reviewed-by: Juergen Gross <jgross@xxxxxxxx>
Signed-off-by: Tom Lendacky <thomas.lendacky@xxxxxxx>
---
 arch/x86/xen/enlighten_pv.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c
index 290bc5a..df19217 100644
--- a/arch/x86/xen/enlighten_pv.c
+++ b/arch/x86/xen/enlighten_pv.c
@@ -263,6 +263,7 @@ static void __init xen_init_capabilities(void)
        setup_clear_cpu_cap(X86_FEATURE_MTRR);
        setup_clear_cpu_cap(X86_FEATURE_ACC);
        setup_clear_cpu_cap(X86_FEATURE_X2APIC);
+       setup_clear_cpu_cap(X86_FEATURE_SME);
 
        /*
         * Xen PV would need some work to support PCID: CR3 handling as well
-- 
1.9.1


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