[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 12/13] arm/xen: Get event-channel irq through HVM_PARAM when booting with ACPI
From: Shannon Zhao <shannon.zhao@xxxxxxxxxx> When booting with ACPI, it could get the event-channel irq through HVM_PARAM_CALLBACK_IRQ. Signed-off-by: Shannon Zhao <shannon.zhao@xxxxxxxxxx> --- arch/arm/xen/enlighten.c | 23 +++++++++++++++++++---- 1 file changed, 19 insertions(+), 4 deletions(-) diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c index 1373d6d..b8e9db8 100644 --- a/arch/arm/xen/enlighten.c +++ b/arch/arm/xen/enlighten.c @@ -25,6 +25,7 @@ #include <linux/cpufreq.h> #include <linux/cpu.h> #include <linux/console.h> +#include <linux/acpi.h> #include <linux/mm.h> @@ -190,10 +191,24 @@ static int __init xen_guest_init(void) if (!xen_domain()) return 0; - xen_events_irq = irq_of_parse_and_map(xen_node, 0); - if (!xen_events_irq) { - pr_err("Xen event channel interrupt not found\n"); - return -ENODEV; + if (!acpi_disabled) { + struct xen_hvm_param a; + + a.domid = DOMID_SELF; + a.index = HVM_PARAM_CALLBACK_IRQ; + if (HYPERVISOR_hvm_op(HVMOP_get_param, &a)) { + if ((a.value >> 56) != 3) { + pr_err("Can't get Xen event-channel irq\n"); + return -ENODEV; + } + } + xen_events_irq = a.value & 0xff; + } else { + xen_events_irq = irq_of_parse_and_map(xen_node, 0); + if (!xen_events_irq) { + pr_err("Xen event channel interrupt not found\n"); + return -ENODEV; + } } shared_info_page = (struct shared_info *)get_zeroed_page(GFP_KERNEL); -- 2.1.0 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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