Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757879Ab1FPW2t (ORCPT ); Thu, 16 Jun 2011 18:28:49 -0400 Received: from mx1.redhat.com ([209.132.183.28]:29908 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756695Ab1FPW2g (ORCPT ); Thu, 16 Jun 2011 18:28:36 -0400 From: Glauber Costa To: kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Rik van Riel , Jeremy Fitzhardinge , Peter Zijlstra , Avi Kivity , Anthony Liguori , Eric B Munson Subject: [PATCH v2 4/7] KVM-GST: Add a pv_ops stub for steal time Date: Thu, 16 Jun 2011 18:20:53 -0400 Message-Id: <1308262856-5779-5-git-send-email-glommer@redhat.com> In-Reply-To: <1308262856-5779-1-git-send-email-glommer@redhat.com> References: <1308262856-5779-1-git-send-email-glommer@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2768 Lines: 83 This patch adds a function pointer in one of the many paravirt_ops structs, to allow guests to register a steal time function. Signed-off-by: Glauber Costa CC: Rik van Riel CC: Jeremy Fitzhardinge CC: Peter Zijlstra CC: Avi Kivity CC: Anthony Liguori CC: Eric B Munson --- arch/x86/include/asm/paravirt.h | 9 +++++++++ arch/x86/include/asm/paravirt_types.h | 1 + arch/x86/kernel/paravirt.c | 9 +++++++++ 3 files changed, 19 insertions(+), 0 deletions(-) diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h index ebbc4d8..a7d2db9 100644 --- a/arch/x86/include/asm/paravirt.h +++ b/arch/x86/include/asm/paravirt.h @@ -230,6 +230,15 @@ static inline unsigned long long paravirt_sched_clock(void) return PVOP_CALL0(unsigned long long, pv_time_ops.sched_clock); } +struct jump_label_key; +extern struct jump_label_key paravirt_steal_enabled; +extern struct jump_label_key paravirt_steal_rq_enabled; + +static inline u64 paravirt_steal_clock(int cpu) +{ + return PVOP_CALL1(u64, pv_time_ops.steal_clock, cpu); +} + static inline unsigned long long paravirt_read_pmc(int counter) { return PVOP_CALL1(u64, pv_cpu_ops.read_pmc, counter); diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h index 8288509..2c76521 100644 --- a/arch/x86/include/asm/paravirt_types.h +++ b/arch/x86/include/asm/paravirt_types.h @@ -89,6 +89,7 @@ struct pv_lazy_ops { struct pv_time_ops { unsigned long long (*sched_clock)(void); + unsigned long long (*steal_clock)(int cpu); unsigned long (*get_tsc_khz)(void); }; diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c index 869e1ae..613a793 100644 --- a/arch/x86/kernel/paravirt.c +++ b/arch/x86/kernel/paravirt.c @@ -202,6 +202,14 @@ static void native_flush_tlb_single(unsigned long addr) __native_flush_tlb_single(addr); } +struct jump_label_key paravirt_steal_enabled; +struct jump_label_key paravirt_steal_rq_enabled; + +static u64 native_steal_clock(int cpu) +{ + return 0; +} + /* These are in entry.S */ extern void native_iret(void); extern void native_irq_enable_sysexit(void); @@ -307,6 +315,7 @@ struct pv_init_ops pv_init_ops = { struct pv_time_ops pv_time_ops = { .sched_clock = native_sched_clock, + .steal_clock = native_steal_clock, }; struct pv_irq_ops pv_irq_ops = { -- 1.7.3.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/