On Tue, Jun 6, 2017 at 2:31 PM, Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx> wrote: > >> --- a/arch/x86/xen/setup.c >> +++ b/arch/x86/xen/setup.c >> @@ -1037,6 +1037,12 @@ void __init xen_arch_setup(void) >> } >> #endif >> >> + /* >> + * Xen would need some work to support PCID: CR3 handling as well >> + * as xen_flush_tlb_others() would need updating. >> + */ >> + setup_clear_cpu_cap(X86_FEATURE_PCID); > > > Capabilities for PV guests are typically set in xen_init_capabilities() now. Do I need this just for PV or for all Xen guests? Do the hardware-assisted guests still use paravirt flushes? Does the hypervisor either support PCID or correctly clear the PCID CPUID bit? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
