Boris Ostrovsky a71dbdaa8c hypervisor/x86/xen: Unset X86_BUG_SYSRET_SS_ATTRS on Xen PV guests ... Commit 61f01dd941 ("x86_64, asm: Work around AMD SYSRET SS descriptor attribute issue") makes AMD processors set SS to __KERNEL_DS in __switch_to() to deal with cases when SS is NULL. This breaks Xen PV guests who do not want to load SS with__KERNEL_DS. Since the problem that the commit is trying to address would have to be fixed in the hypervisor (if it in fact exists under Xen) there is no reason to set X86_BUG_SYSRET_SS_ATTRS flag for PV VPCUs here. This can be easily achieved by adding x86_hyper_xen_hvm.set_cpu_features op which will clear this flag. (And since this structure is no longer HVM-specific we should do some renaming). Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Reported-by: Sander Eikelenboom <linux@eikelenboom.it> Signed-off-by: David Vrabel <david.vrabel@citrix.com>		2015-05-05 18:27:43 +01:00
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asm	hypervisor/x86/xen: Unset X86_BUG_SYSRET_SS_ATTRS on Xen PV guests	2015-05-05 18:27:43 +01:00
uapi/asm	Char/Misc driver patches for 4.1-rc1	2015-04-21 09:42:58 -07:00