[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH v11 4/5] arm64: introduce CONFIG_PARAVIRT, PARAVIRT_TIME_ACCOUNTING and pv_time_ops
On Tue, 17 Nov 2015, Will Deacon wrote: > On Tue, Nov 17, 2015 at 05:34:36PM +0000, Marc Zyngier wrote: > > On 17/11/15 17:29, Will Deacon wrote: > > > On Tue, Nov 10, 2015 at 02:11:38PM +0000, Stefano Stabellini wrote: > > >> On Thu, 5 Nov 2015, Stefano Stabellini wrote: > > >>> Introduce CONFIG_PARAVIRT and PARAVIRT_TIME_ACCOUNTING on ARM64. > > >>> Necessary duplication of paravirt.h and paravirt.c with ARM. > > >>> > > >>> The only paravirt interface supported is pv_time_ops.steal_clock, so no > > >>> runtime pvops patching needed. > > >>> > > >>> This allows us to make use of steal_account_process_tick for stolen > > >>> ticks accounting. > > >>> > > >>> Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx> > > >>> Acked-by: Marc Zyngier <marc.zyngier@xxxxxxx> > > >> > > >> Ping? > > >> > > >> Catalin, Will, > > >> are you happy with this change? > > > > > > I'm happy if Marc's happy. Marc? > > > > My Ack is already on the tin! ;-) > > Ah yes, I only saw the cc line. In which case, I assume Stefano will > take this via the xen tree. Unfortunately I am still missing Russell's ack on the arm patch (3/5). Would you be OK if I dropped stolen time support for arm, only keeping the arm64 part? The price to pay is two small ifdefs in arch/arm/xen/enlighten.c: diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c index 15621b1..87e2fec 100644 --- a/arch/arm/xen/enlighten.c +++ b/arch/arm/xen/enlighten.c @@ -16,7 +16,9 @@ #include <asm/xen/hypercall.h> #include <asm/arch_timer.h> #include <asm/system_misc.h> +#ifdef ARM64 #include <asm/paravirt.h> +#endif #include <linux/jump_label.h> #include <linux/interrupt.h> #include <linux/irqreturn.h> @@ -289,9 +291,10 @@ static int __init xen_guest_init(void) register_cpu_notifier(&xen_cpu_notifier); +#ifdef ARM64 pv_time_ops.steal_clock = xen_stolen_accounting; static_key_slow_inc(¶virt_steal_enabled); - +#endif return 0; } early_initcall(xen_guest_init); _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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