From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932833Ab0JLQgK (ORCPT ); Tue, 12 Oct 2010 12:36:10 -0400 Received: from smtp02.citrix.com ([66.165.176.63]:30077 "EHLO SMTP02.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932422Ab0JLQfI (ORCPT ); Tue, 12 Oct 2010 12:35:08 -0400 X-IronPort-AV: E=Sophos;i="4.57,320,1283745600"; d="scan'208";a="117744597" From: stefano.stabellini@eu.citrix.com To: linux-kernel@vger.kernel.org Cc: xen-devel@lists.xensource.com, jeremy@goop.org, konrad.wilk@oracle.com, Stefano Stabellini Subject: [PATCH v4 3/7] xen: implement xen_hvm_register_pirq Date: Tue, 12 Oct 2010 17:34:45 +0100 Message-Id: <1286901289-8156-3-git-send-email-stefano.stabellini@eu.citrix.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: References: X-OriginalArrivalTime: 12 Oct 2010 16:35:07.0577 (UTC) FILETIME=[6E3C3A90:01CB6A2B] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Stefano Stabellini xen_hvm_register_pirq allows the kernel to map a GSI into a Xen pirq and receive the interrupt as an event channel from that point on. Signed-off-by: Stefano Stabellini Reviewed-by: Konrad Rzeszutek Wilk --- arch/x86/pci/xen.c | 38 ++++++++++++++++++++++++++++++++++++++ drivers/xen/events.c | 4 +++- include/xen/interface/physdev.h | 30 ++++++++++++++++++++++++++++++ 3 files changed, 71 insertions(+), 1 deletions(-) diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c index b19c873..e7f897b 100644 --- a/arch/x86/pci/xen.c +++ b/arch/x86/pci/xen.c @@ -17,6 +17,44 @@ #include #include +#ifdef CONFIG_ACPI +static int xen_hvm_register_pirq(u32 gsi, int triggering) +{ + int rc, irq; + struct physdev_map_pirq map_irq; + int shareable = 0; + char *name; + + if (!xen_hvm_domain()) + return -1; + + map_irq.domid = DOMID_SELF; + map_irq.type = MAP_PIRQ_TYPE_GSI; + map_irq.index = gsi; + map_irq.pirq = -1; + + rc = HYPERVISOR_physdev_op(PHYSDEVOP_map_pirq, &map_irq); + if (rc) { + printk(KERN_WARNING "xen map irq failed %d\n", rc); + return -1; + } + + if (triggering == ACPI_EDGE_SENSITIVE) { + shareable = 0; + name = "ioapic-edge"; + } else { + shareable = 1; + name = "ioapic-level"; + } + + irq = xen_map_pirq_gsi(map_irq.pirq, gsi, shareable, name); + + printk(KERN_DEBUG "xen: --> irq=%d, pirq=%d\n", irq, map_irq.pirq); + + return irq; +} +#endif + #if defined(CONFIG_PCI_MSI) #include diff --git a/drivers/xen/events.c b/drivers/xen/events.c index c77a44b..4fed942 100644 --- a/drivers/xen/events.c +++ b/drivers/xen/events.c @@ -36,6 +36,7 @@ #include #include #include +#include #include #include @@ -75,7 +76,8 @@ enum xen_irq_type { * event channel - irq->event channel mapping * cpu - cpu this event channel is bound to * index - type-specific information: - * PIRQ - vector, with MSB being "needs EIO" + * PIRQ - vector, with MSB being "needs EIO", or physical IRQ of the HVM + * guest, or GSI (real passthrough IRQ) of the device. * VIRQ - virq number * IPI - IPI vector * EVTCHN - diff --git a/include/xen/interface/physdev.h b/include/xen/interface/physdev.h index fbb5883..69a72b9 100644 --- a/include/xen/interface/physdev.h +++ b/include/xen/interface/physdev.h @@ -106,6 +106,36 @@ struct physdev_irq { uint32_t vector; }; +#define MAP_PIRQ_TYPE_MSI 0x0 +#define MAP_PIRQ_TYPE_GSI 0x1 +#define MAP_PIRQ_TYPE_UNKNOWN 0x2 + +#define PHYSDEVOP_map_pirq 13 +struct physdev_map_pirq { + domid_t domid; + /* IN */ + int type; + /* IN */ + int index; + /* IN or OUT */ + int pirq; + /* IN */ + int bus; + /* IN */ + int devfn; + /* IN */ + int entry_nr; + /* IN */ + uint64_t table_base; +}; + +#define PHYSDEVOP_unmap_pirq 14 +struct physdev_unmap_pirq { + domid_t domid; + /* IN */ + int pirq; +}; + /* * Argument to physdev_op_compat() hypercall. Superceded by new physdev_op() * hypercall since 0x00030202. -- 1.5.6.5