x86/cpuid: Advertise SSB_NO to guests by default

This is a statement of hardware behaviour, and not related to controls for the
guest kernel to use.  Pass it straight through from hardware.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
(cherry picked from commit 15b7611efd497c4b65f350483857082cb70fc348)

diff --git a/xen/include/public/arch-x86/cpufeatureset.h b/xen/include/public/arch-x86/cpufeatureset.h
index f62c775b9d72e3dbb1f7add8e315a1f3ba9ac952..3d45b05af2a56d735afdc588119b38bbb8a70b5a 100644 (file)
--- a/xen/include/public/arch-x86/cpufeatureset.h
+++ b/xen/include/public/arch-x86/cpufeatureset.h
@@ -264,7 +264,7 @@ XEN_CPUFEATURE(NO_LMSL,       8*32+20) /*S  EFER.LMSLE no longer supported. */
 XEN_CPUFEATURE(AMD_PPIN,      8*32+23) /*   Protected Processor Inventory Number */
 XEN_CPUFEATURE(AMD_SSBD,      8*32+24) /*   MSR_SPEC_CTRL.SSBD available */
 XEN_CPUFEATURE(VIRT_SSBD,     8*32+25) /*   MSR_VIRT_SPEC_CTRL.SSBD */
-XEN_CPUFEATURE(SSB_NO,        8*32+26) /*   Hardware not vulnerable to SSB */
+XEN_CPUFEATURE(SSB_NO,        8*32+26) /*A  Hardware not vulnerable to SSB */
 XEN_CPUFEATURE(PSFD,          8*32+28) /*   MSR_SPEC_CTRL.PSFD */
 
 /* Intel-defined CPU features, CPUID level 0x00000007:0.edx, word 9 */