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[Xen-devel] [PATCH v7 32/36] xen/x86: Remove SME feature in PV guests
- To: linux-arch@xxxxxxxxxxxxxxx, linux-efi@xxxxxxxxxxxxxxx, kvm@xxxxxxxxxxxxxxx, linux-doc@xxxxxxxxxxxxxxx, x86@xxxxxxxxxx, kexec@xxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, kasan-dev@xxxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxx, linux-mm@xxxxxxxxx, iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx
- From: Tom Lendacky <thomas.lendacky@xxxxxxx>
- Date: Fri, 16 Jun 2017 13:55:54 -0500
- Bcc: ssg.sos.patches@xxxxxxx
- Cc: Brijesh Singh <brijesh.singh@xxxxxxx>, Toshimitsu Kani <toshi.kani@xxxxxxx>, "Michael S. Tsirkin" <mst@xxxxxxxxxx>, Matt Fleming <matt@xxxxxxxxxxxxxxxxxxx>, Alexander Potapenko <glider@xxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>, Jonathan Corbet <corbet@xxxxxxx>, Joerg Roedel <joro@xxxxxxxxxx>, Radim Krčmář <rkrcmar@xxxxxxxxxx>, Larry Woodman <lwoodman@xxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>, Dave Young <dyoung@xxxxxxxxxx>, Rik van Riel <riel@xxxxxxxxxx>, Arnd Bergmann <arnd@xxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, Andy Lutomirski <luto@xxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Dmitry Vyukov <dvyukov@xxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, Paolo Bonzini <pbonzini@xxxxxxxxxx>
- Delivery-date: Fri, 16 Jun 2017 18:56:07 +0000
- List-id: Xen developer discussion <xen-devel.lists.xen.org>
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Xen does not currently support SME for PV guests. Clear the SME cpu
capability in order to avoid any ambiguity.
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 f33eef4..e6ecf42 100644
--- a/arch/x86/xen/enlighten_pv.c
+++ b/arch/x86/xen/enlighten_pv.c
@@ -294,6 +294,7 @@ 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);
if (!xen_initial_domain())
setup_clear_cpu_cap(X86_FEATURE_ACPI);
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