From: Stefano Stabellini <stefano.stabellini-mvvWK6WmYclDPfheJLI6IQ@public.gmane.org>
To: arnd-r2nGTMty4D4@public.gmane.org
Cc: xen-devel-GuqFBffKawuULHF6PoxzQEEOCMrvLtNR@public.gmane.org,
linaro-dev-cunTk1MwBs8s++Sfvej+rw@public.gmane.org,
Ian.Campbell-Sxgqhf6Nn4DQT0dZR+AlfA@public.gmane.org,
konrad.wilk-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org,
tim-LM2mM/qkH7s@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Subject: [PATCH v5 13/17] xen/arm: receive Xen events on ARM
Date: Mon, 17 Sep 2012 18:38:59 +0100 [thread overview]
Message-ID: <1347903543-2135-13-git-send-email-stefano.stabellini@eu.citrix.com> (raw)
In-Reply-To: <alpine.DEB.2.02.1209171215490.29232-7Z66fg9igcxYtxbxJUhB2Dgeux46jI+i@public.gmane.org>
Compile events.c on ARM.
Parse, map and enable the IRQ to get event notifications from the device
tree (node "/xen").
Signed-off-by: Stefano Stabellini <stefano.stabellini-mvvWK6WmYclDPfheJLI6IQ@public.gmane.org>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
---
arch/arm/include/asm/xen/events.h | 18 ++++++++++++++++++
arch/arm/xen/enlighten.c | 33 +++++++++++++++++++++++++++++++++
arch/x86/xen/enlighten.c | 1 +
arch/x86/xen/irq.c | 1 +
arch/x86/xen/xen-ops.h | 1 -
drivers/xen/events.c | 17 ++++++++++++++---
include/xen/events.h | 2 ++
7 files changed, 69 insertions(+), 4 deletions(-)
create mode 100644 arch/arm/include/asm/xen/events.h
diff --git a/arch/arm/include/asm/xen/events.h b/arch/arm/include/asm/xen/events.h
new file mode 100644
index 0000000..94b4e90
--- /dev/null
+++ b/arch/arm/include/asm/xen/events.h
@@ -0,0 +1,18 @@
+#ifndef _ASM_ARM_XEN_EVENTS_H
+#define _ASM_ARM_XEN_EVENTS_H
+
+#include <asm/ptrace.h>
+
+enum ipi_vector {
+ XEN_PLACEHOLDER_VECTOR,
+
+ /* Xen IPIs go here */
+ XEN_NR_IPIS,
+};
+
+static inline int xen_irqs_disabled(struct pt_regs *regs)
+{
+ return raw_irqs_disabled_flags(regs->ARM_cpsr);
+}
+
+#endif /* _ASM_ARM_XEN_EVENTS_H */
diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c
index 036a4d8..bad67ad 100644
--- a/arch/arm/xen/enlighten.c
+++ b/arch/arm/xen/enlighten.c
@@ -1,4 +1,5 @@
#include <xen/xen.h>
+#include <xen/events.h>
#include <xen/grant_table.h>
#include <xen/hvm.h>
#include <xen/interface/xen.h>
@@ -9,6 +10,8 @@
#include <xen/xenbus.h>
#include <asm/xen/hypervisor.h>
#include <asm/xen/hypercall.h>
+#include <linux/interrupt.h>
+#include <linux/irqreturn.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_irq.h>
@@ -33,6 +36,8 @@ EXPORT_SYMBOL_GPL(xen_have_vector_callback);
int xen_platform_pci_unplug = XEN_UNPLUG_ALL;
EXPORT_SYMBOL_GPL(xen_platform_pci_unplug);
+static __read_mostly int xen_events_irq = -1;
+
int xen_remap_domain_mfn_range(struct vm_area_struct *vma,
unsigned long addr,
unsigned long mfn, int nr,
@@ -74,6 +79,9 @@ static int __init xen_guest_init(void)
if (of_address_to_resource(node, GRANT_TABLE_PHYSADDR, &res))
return 0;
xen_hvm_resume_frames = res.start >> PAGE_SHIFT;
+ xen_events_irq = irq_of_parse_and_map(node, 0);
+ pr_info("Xen %s support found, events_irq=%d gnttab_frame_pfn=%lx\n",
+ version, xen_events_irq, xen_hvm_resume_frames);
xen_domain_type = XEN_HVM_DOMAIN;
xen_setup_features();
@@ -115,3 +123,28 @@ static int __init xen_guest_init(void)
return 0;
}
core_initcall(xen_guest_init);
+
+static irqreturn_t xen_arm_callback(int irq, void *arg)
+{
+ xen_hvm_evtchn_do_upcall();
+ return IRQ_HANDLED;
+}
+
+static int __init xen_init_events(void)
+{
+ if (!xen_domain() || xen_events_irq < 0)
+ return -ENODEV;
+
+ xen_init_IRQ();
+
+ if (request_percpu_irq(xen_events_irq, xen_arm_callback,
+ "events", xen_vcpu)) {
+ pr_err("Error requesting IRQ %d\n", xen_events_irq);
+ return -EINVAL;
+ }
+
+ enable_percpu_irq(xen_events_irq, 0);
+
+ return 0;
+}
+postcore_initcall(xen_init_events);
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 47b3acd..689a4c9 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -33,6 +33,7 @@
#include <linux/memblock.h>
#include <xen/xen.h>
+#include <xen/events.h>
#include <xen/interface/xen.h>
#include <xen/interface/version.h>
#include <xen/interface/physdev.h>
diff --git a/arch/x86/xen/irq.c b/arch/x86/xen/irq.c
index 1573376..01a4dc0 100644
--- a/arch/x86/xen/irq.c
+++ b/arch/x86/xen/irq.c
@@ -5,6 +5,7 @@
#include <xen/interface/xen.h>
#include <xen/interface/sched.h>
#include <xen/interface/vcpu.h>
+#include <xen/events.h>
#include <asm/xen/hypercall.h>
#include <asm/xen/hypervisor.h>
diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h
index bb5a810..a95b417 100644
--- a/arch/x86/xen/xen-ops.h
+++ b/arch/x86/xen/xen-ops.h
@@ -35,7 +35,6 @@ void xen_set_pat(u64);
char * __init xen_memory_setup(void);
void __init xen_arch_setup(void);
-void __init xen_init_IRQ(void);
void xen_enable_sysenter(void);
void xen_enable_syscall(void);
void xen_vcpu_restore(void);
diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index c60d162..8672211 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -31,14 +31,16 @@
#include <linux/irqnr.h>
#include <linux/pci.h>
+#ifdef CONFIG_X86
#include <asm/desc.h>
#include <asm/ptrace.h>
#include <asm/irq.h>
#include <asm/idle.h>
#include <asm/io_apic.h>
-#include <asm/sync_bitops.h>
#include <asm/xen/page.h>
#include <asm/xen/pci.h>
+#endif
+#include <asm/sync_bitops.h>
#include <asm/xen/hypercall.h>
#include <asm/xen/hypervisor.h>
@@ -50,6 +52,9 @@
#include <xen/interface/event_channel.h>
#include <xen/interface/hvm/hvm_op.h>
#include <xen/interface/hvm/params.h>
+#include <xen/interface/physdev.h>
+#include <xen/interface/sched.h>
+#include <asm/hw_irq.h>
/*
* This lock protects updates to the following mapping and reference-count
@@ -1386,7 +1391,9 @@ void xen_evtchn_do_upcall(struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
+#ifdef CONFIG_X86
exit_idle();
+#endif
irq_enter();
__xen_evtchn_do_upcall();
@@ -1795,9 +1802,9 @@ void xen_callback_vector(void)
void xen_callback_vector(void) {}
#endif
-void __init xen_init_IRQ(void)
+void xen_init_IRQ(void)
{
- int i, rc;
+ int i;
evtchn_to_irq = kcalloc(NR_EVENT_CHANNELS, sizeof(*evtchn_to_irq),
GFP_KERNEL);
@@ -1813,6 +1820,7 @@ void __init xen_init_IRQ(void)
pirq_needs_eoi = pirq_needs_eoi_flag;
+#ifdef CONFIG_X86
if (xen_hvm_domain()) {
xen_callback_vector();
native_init_IRQ();
@@ -1820,6 +1828,7 @@ void __init xen_init_IRQ(void)
* __acpi_register_gsi can point at the right function */
pci_xen_hvm_init();
} else {
+ int rc;
struct physdev_pirq_eoi_gmfn eoi_gmfn;
irq_ctx_init(smp_processor_id());
@@ -1835,4 +1844,6 @@ void __init xen_init_IRQ(void)
} else
pirq_needs_eoi = pirq_check_eoi_map;
}
+#endif
}
+EXPORT_SYMBOL_GPL(xen_init_IRQ);
diff --git a/include/xen/events.h b/include/xen/events.h
index 04399b2..c6bfe01 100644
--- a/include/xen/events.h
+++ b/include/xen/events.h
@@ -109,4 +109,6 @@ int xen_irq_from_gsi(unsigned gsi);
/* Determine whether to ignore this IRQ if it is passed to a guest. */
int xen_test_irq_shared(int irq);
+/* initialize Xen IRQ subsystem */
+void xen_init_IRQ(void);
#endif /* _XEN_EVENTS_H */
--
1.7.2.5
next prev parent reply other threads:[~2012-09-17 17:38 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-17 17:37 [PATCH v5 00/17] Introduce Xen support on ARM (based on 3.6-rc5) Stefano Stabellini
[not found] ` <alpine.DEB.2.02.1209171215490.29232-7Z66fg9igcxYtxbxJUhB2Dgeux46jI+i@public.gmane.org>
2012-09-17 17:38 ` [PATCH v5 01/17] arm: initial Xen support Stefano Stabellini
2012-09-17 17:38 ` [PATCH v5 02/17] xen/arm: hypercalls Stefano Stabellini
2012-09-17 17:38 ` [PATCH v5 03/17] xen/arm: page.h definitions Stefano Stabellini
2012-09-17 17:38 ` [PATCH v5 04/17] xen/arm: sync_bitops Stefano Stabellini
2012-09-17 17:38 ` [PATCH v5 05/17] xen/arm: empty implementation of grant_table arch specific functions Stefano Stabellini
2012-09-17 17:38 ` [PATCH v5 06/17] docs: Xen ARM DT bindings Stefano Stabellini
2012-09-18 2:59 ` Rob Herring
2012-09-17 17:38 ` [PATCH v5 07/17] xen/arm: Xen detection and shared_info page mapping Stefano Stabellini
2012-09-17 17:38 ` [PATCH v5 08/17] xen/arm: Introduce xen_ulong_t for unsigned long Stefano Stabellini
2012-09-17 17:38 ` [PATCH v5 09/17] xen: do not compile manage, balloon, pci, acpi, pcpu and cpu_hotplug on ARM Stefano Stabellini
2012-09-17 17:38 ` [PATCH v5 10/17] xen/arm: introduce CONFIG_XEN " Stefano Stabellini
2012-09-17 17:38 ` [PATCH v5 11/17] xen/arm: get privilege status Stefano Stabellini
2012-09-17 17:38 ` [PATCH v5 12/17] xen/arm: initialize grant_table on ARM Stefano Stabellini
2012-09-17 17:38 ` Stefano Stabellini [this message]
2012-09-17 17:39 ` [PATCH v5 14/17] xen/arm: implement alloc/free_xenballooned_pages with alloc_pages/kfree Stefano Stabellini
2012-09-17 17:39 ` [PATCH v5 16/17] xen/arm: compile netback Stefano Stabellini
2012-09-17 17:39 ` [PATCH v5 17/17] MAINTAINERS: add myself as Xen ARM maintainer Stefano Stabellini
2012-09-17 17:39 ` [PATCH v5 15/17] xen/arm: compile blkfront and blkback Stefano Stabellini
2012-09-18 12:34 ` [PATCH v5 00/17] Introduce Xen support on ARM (based on 3.6-rc5) Arnd Bergmann
[not found] ` <201209181234.29557.arnd-r2nGTMty4D4@public.gmane.org>
2012-09-18 13:53 ` Konrad Rzeszutek Wilk
2012-09-18 13:57 ` Stefano Stabellini
2012-09-18 14:37 ` Konrad Rzeszutek Wilk
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