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From: Shannon Zhao <zhaoshenglong@huawei.com>
To: linux-arm-kernel@lists.infradead.org, ard.biesheuvel@linaro.org,
	stefano.stabellini@citrix.com, david.vrabel@citrix.com
Cc: mark.rutland@arm.com, devicetree@vger.kernel.org,
	linux-efi@vger.kernel.org, ian.campbell@citrix.com,
	catalin.marinas@arm.com, will.deacon@arm.com,
	linux-kernel@vger.kernel.org, xen-devel@lists.xen.org,
	julien.grall@arm.com, shannon.zhao@linaro.org,
	peter.huangpeng@huawei.com
Subject: [PATCH v6 10/17] arm/xen: Get event-channel irq through HVM_PARAM when booting with ACPI
Date: Thu, 17 Mar 2016 17:57:09 +0800	[thread overview]
Message-ID: <1458208636-12960-11-git-send-email-zhaoshenglong@huawei.com> (raw)
In-Reply-To: <1458208636-12960-1-git-send-email-zhaoshenglong@huawei.com>

From: Shannon Zhao <shannon.zhao@linaro.org>

When booting with ACPI, it could get the event-channel irq through
HVM_PARAM_CALLBACK_IRQ.

Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
---
 arch/arm/xen/enlighten.c | 36 +++++++++++++++++++++++++++++++++++-
 1 file changed, 35 insertions(+), 1 deletion(-)

diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c
index d94f726..680aae0 100644
--- a/arch/arm/xen/enlighten.c
+++ b/arch/arm/xen/enlighten.c
@@ -30,6 +30,7 @@
 #include <linux/time64.h>
 #include <linux/timekeeping.h>
 #include <linux/timekeeper_internal.h>
+#include <linux/acpi.h>
 
 #include <linux/mm.h>
 
@@ -278,6 +279,35 @@ void __init xen_early_init(void)
 		add_preferred_console("hvc", 0, NULL);
 }
 
+static void __init xen_acpi_guest_init(void)
+{
+#ifdef CONFIG_ACPI
+	struct xen_hvm_param a;
+	int interrupt, trigger, polarity;
+
+	a.domid = DOMID_SELF;
+	a.index = HVM_PARAM_CALLBACK_IRQ;
+	xen_events_irq = 0;
+
+	if (!HYPERVISOR_hvm_op(HVMOP_get_param, &a)) {
+		if ((a.value >> 56) == HVM_PARAM_CALLBACK_TYPE_PPI) {
+			interrupt = a.value & 0xff;
+			trigger = ((a.value >> 8) & 0x1) ? ACPI_EDGE_SENSITIVE
+							 : ACPI_LEVEL_SENSITIVE;
+			polarity = ((a.value >> 8) & 0x2) ? ACPI_ACTIVE_LOW
+							  : ACPI_ACTIVE_HIGH;
+			xen_events_irq = acpi_register_gsi(NULL, interrupt,
+							   trigger, polarity);
+		}
+	}
+#endif
+}
+
+static void __init xen_dt_guest_init(void)
+{
+	xen_events_irq = irq_of_parse_and_map(xen_node, 0);
+}
+
 static int __init xen_guest_init(void)
 {
 	struct xen_add_to_physmap xatp;
@@ -286,7 +316,11 @@ static int __init xen_guest_init(void)
 	if (!xen_domain())
 		return 0;
 
-	xen_events_irq = irq_of_parse_and_map(xen_node, 0);
+	if (!acpi_disabled)
+		xen_acpi_guest_init();
+	else
+		xen_dt_guest_init();
+
 	if (!xen_events_irq) {
 		pr_err("Xen event channel interrupt not found\n");
 		return -ENODEV;
-- 
2.0.4



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  parent reply	other threads:[~2016-03-17  9:57 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-03-17  9:56 [PATCH v6 00/17] Add ACPI support for Xen Dom0 on ARM64 Shannon Zhao
2016-03-17  9:57 ` [PATCH v6 01/17] Xen: ACPI: Hide UART used by Xen Shannon Zhao
2016-03-17  9:57 ` [PATCH v6 02/17] xen/grant-table: Move xlated_setup_gnttab_pages to common place Shannon Zhao
2016-03-17  9:57 ` [PATCH v6 03/17] Xen: xlate: Use page_to_xen_pfn instead of page_to_pfn Shannon Zhao
2016-03-17  9:57 ` [PATCH v6 04/17] arm/xen: Use xen_xlate_map_ballooned_pages to setup grant table Shannon Zhao
2016-03-17  9:57 ` [PATCH v6 05/17] xen: memory : Add new XENMAPSPACE type XENMAPSPACE_dev_mmio Shannon Zhao
2016-03-17  9:57 ` [PATCH v6 06/17] Xen: ARM: Add support for mapping platform device mmio Shannon Zhao
2016-03-17  9:57 ` [PATCH v6 07/17] Xen: ARM: Add support for mapping AMBA " Shannon Zhao
2016-03-17  9:57 ` [PATCH v6 08/17] Xen: public/hvm: sync changes of HVM_PARAM_CALLBACK_VIA ABI from Xen Shannon Zhao
2016-03-17  9:57 ` [PATCH v6 09/17] xen/hvm/params: Add a new delivery type for event-channel in HVM_PARAM_CALLBACK_IRQ Shannon Zhao
2016-03-17  9:57 ` Shannon Zhao [this message]
2016-03-17  9:57 ` [PATCH v6 11/17] ARM: XEN: Move xen_early_init() before efi_init() Shannon Zhao
2016-03-17  9:57 ` [PATCH v6 12/17] ARM64: ACPI: Check if it runs on Xen to enable or disable ACPI Shannon Zhao
2016-03-17  9:57 ` [PATCH v6 13/17] ARM: Xen: Document UEFI support on Xen ARM virtual platforms Shannon Zhao
2016-03-17  9:57 ` [PATCH v6 14/17] XEN: EFI: Move x86 specific codes to architecture directory Shannon Zhao
2016-03-17  9:57 ` [PATCH v6 15/17] ARM64: XEN: Add a function to initialize Xen specific UEFI runtime services Shannon Zhao
2016-03-17  9:57 ` [PATCH v6 16/17] FDT: Add a helper to get the subnode by given name Shannon Zhao
2016-03-17  9:57 ` [PATCH v6 17/17] Xen: EFI: Parse DT parameters for Xen specific UEFI Shannon Zhao
     [not found] ` <1458208636-12960-2-git-send-email-zhaoshenglong@huawei.com>
2016-03-17 12:59   ` [PATCH v6 01/17] Xen: ACPI: Hide UART used by Xen Rafael J. Wysocki
2016-03-24 12:21 ` [PATCH v6 00/17] Add ACPI support for Xen Dom0 on ARM64 Stefano Stabellini

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