From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefano Stabellini Subject: [PATCH v5 1/6] xen: do not initialize the interval timer and PCSPK emulator Date: Tue, 14 Feb 2012 15:07:13 +0000 Message-ID: <1329232038-12349-1-git-send-email-stefano.stabellini@eu.citrix.com> References: Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+gceq-qemu-devel=gmane.org@nongnu.org Sender: qemu-devel-bounces+gceq-qemu-devel=gmane.org@nongnu.org To: qemu-devel@nongnu.org Cc: xen-devel@lists.xensource.com, Stefano Stabellini , jan.kiszka@siemens.com, avi@redhat.com, pbonzini@redhat.com List-Id: xen-devel@lists.xenproject.org PIT and PCSPK are emulated by the hypervisor so we don't need to emulate them in Qemu: this patch prevents Qemu from waking up needlessly at PIT_FREQ on Xen. Signed-off-by: Stefano Stabellini --- hw/pc.c | 9 ++++++--- 1 files changed, 6 insertions(+), 3 deletions(-) diff --git a/hw/pc.c b/hw/pc.c index 7f3aa65..ab9775e 100644 --- a/hw/pc.c +++ b/hw/pc.c @@ -44,6 +44,7 @@ #include "ui/qemu-spice.h" #include "memory.h" #include "exec-memory.h" +#include "arch_init.h" /* output Bochs bios info messages */ //#define DEBUG_BIOS @@ -1139,7 +1140,7 @@ void pc_basic_device_init(ISABus *isa_bus, qemu_irq *gsi, DriveInfo *fd[MAX_FD]; qemu_irq rtc_irq = NULL; qemu_irq *a20_line; - ISADevice *i8042, *port92, *vmmouse, *pit; + ISADevice *i8042, *port92, *vmmouse, *pit = NULL; qemu_irq *cpu_exit_irq; register_ioport_write(0x80, 1, 1, ioport80_write, NULL); @@ -1160,8 +1161,10 @@ void pc_basic_device_init(ISABus *isa_bus, qemu_irq *gsi, qemu_register_boot_set(pc_boot_set, *rtc_state); - pit = pit_init(isa_bus, 0x40, 0); - pcspk_init(pit); + if (!xen_available()) { + pit = pit_init(isa_bus, 0x40, 0); + pcspk_init(pit); + } for(i = 0; i < MAX_SERIAL_PORTS; i++) { if (serial_hds[i]) { -- 1.7.2.5