From mboxrd@z Thu Jan 1 00:00:00 1970 From: Feng Wu Subject: [v2 08/25] iommu, x86: Add intel_irq_remapping_capability() for Intel Date: Wed, 3 Dec 2014 15:39:37 +0800 Message-ID: <1417592394-24343-9-git-send-email-feng.wu@intel.com> References: <1417592394-24343-1-git-send-email-feng.wu@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1417592394-24343-1-git-send-email-feng.wu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org, mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org, x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, gleb-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, pbonzini-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org, joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org, alex.williamson-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, jiang.liu-VuQAYsv1563Yd54FQh9/CA@public.gmane.org Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, kvm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: iommu@lists.linux-foundation.org Add the Intel side implementation for capability in struct irq_remap_ops. Signed-off-by: Feng Wu Reviewed-by: Jiang Liu --- drivers/iommu/intel_irq_remapping.c | 27 +++++++++++++++++++++++++++ drivers/iommu/irq_remapping.c | 2 ++ drivers/iommu/irq_remapping.h | 4 ++++ 3 files changed, 33 insertions(+), 0 deletions(-) diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c index 01786a8..827aeff 100644 --- a/drivers/iommu/intel_irq_remapping.c +++ b/drivers/iommu/intel_irq_remapping.c @@ -651,6 +651,32 @@ error: return -1; } +static bool intel_irq_remapping_capability(enum irq_remap_cap cap) +{ + struct dmar_drhd_unit *drhd; + struct intel_iommu *iommu; + + switch (cap) { + case IRQ_POSTING_CAP: + /* + * If 1) posted-interrupts is disabled by user + * or 2) irq remapping is disabled, posted-interrupts + * is not supported. + */ + if (disable_irq_post || !irq_remapping_enabled) + return 0; + + for_each_iommu(iommu, drhd) + if (!cap_pi_support(iommu->cap)) + return 0; + + return 1; + default: + pr_warn("Unknown irq remapping capability.\n"); + return 0; + } +} + static int ir_parse_one_hpet_scope(struct acpi_dmar_device_scope *scope, struct intel_iommu *iommu, struct acpi_dmar_hardware_unit *drhd) @@ -947,6 +973,7 @@ static struct irq_domain *intel_get_irq_domain(struct irq_alloc_info *info) struct irq_remap_ops intel_irq_remap_ops = { .supported = intel_irq_remapping_supported, + .capability = intel_irq_remapping_capability, .prepare = dmar_table_init, .enable = intel_enable_irq_remapping, .disable = disable_irq_remapping, diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c index 3c3da04..e63e969 100644 --- a/drivers/iommu/irq_remapping.c +++ b/drivers/iommu/irq_remapping.c @@ -24,6 +24,8 @@ int irq_remap_broken; int disable_sourceid_checking; int no_x2apic_optout; +int disable_irq_post = 1; + static struct irq_remap_ops *remap_ops; static void irq_remapping_disable_io_apic(void) diff --git a/drivers/iommu/irq_remapping.h b/drivers/iommu/irq_remapping.h index 2d991b2..cb1f46d 100644 --- a/drivers/iommu/irq_remapping.h +++ b/drivers/iommu/irq_remapping.h @@ -36,6 +36,8 @@ extern int disable_sourceid_checking; extern int no_x2apic_optout; extern int irq_remapping_enabled; +extern int disable_irq_post; + struct irq_remap_ops { /* Check whether Interrupt Remapping is supported */ int (*supported)(void); @@ -76,6 +78,8 @@ extern void ir_ack_apic_edge(struct irq_data *data); #define disable_irq_remap 1 #define irq_remap_broken 0 +#define disable_irq_post 1 + #endif /* CONFIG_IRQ_REMAP */ #endif /* __IRQ_REMAPPING_H */ -- 1.7.1