From: Shannon Zhao <shannon.zhao@linaro.org>
To: linux-arm-kernel@lists.infradead.org, stefano.stabellini@citrix.com
Cc: david.vrabel@citrix.com, devicetree@vger.kernel.org,
linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org,
catalin.marinas@arm.com, will.deacon@arm.com,
julien.grall@arm.com, peter.huangpeng@huawei.com,
xen-devel@lists.xen.org, zhaoshenglong@huawei.com,
shannon.zhao@linaro.org
Subject: [PATCH v10 10/17] arm/xen: Get event-channel irq through HVM_PARAM when booting with ACPI
Date: Fri, 1 Apr 2016 23:49:08 +0800 [thread overview]
Message-ID: <1459525755-36968-11-git-send-email-shannon.zhao@linaro.org> (raw)
In-Reply-To: <1459525755-36968-1-git-send-email-shannon.zhao@linaro.org>
The kernel will 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..06bd61a 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;
+
+ if (HYPERVISOR_hvm_op(HVMOP_get_param, &a)
+ || (a.value >> 56) != HVM_PARAM_CALLBACK_TYPE_PPI) {
+ xen_events_irq = 0;
+ return;
+ }
+
+ 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;
--
2.1.4
next prev parent reply other threads:[~2016-04-01 15:51 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-01 15:48 [PATCH v10 00/17] Add ACPI support for Xen Dom0 on ARM64 Shannon Zhao
2016-04-01 15:48 ` [PATCH v10 01/17] Xen: ACPI: Hide UART used by Xen Shannon Zhao
2016-04-01 19:21 ` Rafael J. Wysocki
2016-04-01 15:49 ` [PATCH v10 02/17] xen/grant-table: Move xlated_setup_gnttab_pages to common place Shannon Zhao
2016-04-06 11:40 ` Julien Grall
2016-04-01 15:49 ` [PATCH v10 03/17] Xen: xlate: Use page_to_xen_pfn instead of page_to_pfn Shannon Zhao
2016-04-06 11:42 ` Julien Grall
2016-04-01 15:49 ` [PATCH v10 04/17] arm/xen: Use xen_xlate_map_ballooned_pages to setup grant table Shannon Zhao
2016-04-06 11:43 ` Julien Grall
2016-04-01 15:49 ` [PATCH v10 05/17] xen: memory : Add new XENMAPSPACE type XENMAPSPACE_dev_mmio Shannon Zhao
2016-04-06 11:44 ` Julien Grall
2016-04-01 15:49 ` [PATCH v10 06/17] Xen: ARM: Add support for mapping platform device mmio Shannon Zhao
2016-04-06 12:16 ` Julien Grall
2016-04-07 1:37 ` Shannon Zhao
2016-04-07 10:32 ` Julien Grall
2016-04-07 11:25 ` Shannon Zhao
2016-04-01 15:49 ` [PATCH v10 07/17] Xen: ARM: Add support for mapping AMBA " Shannon Zhao
2016-04-06 12:26 ` Julien Grall
2016-04-01 15:49 ` [PATCH v10 08/17] Xen: public/hvm: sync changes of HVM_PARAM_CALLBACK_VIA ABI from Xen Shannon Zhao
2016-04-01 15:49 ` [PATCH v10 09/17] xen/hvm/params: Add a new delivery type for event-channel in HVM_PARAM_CALLBACK_IRQ Shannon Zhao
2016-04-06 12:29 ` Julien Grall
2016-04-01 15:49 ` Shannon Zhao [this message]
2016-04-06 12:31 ` [PATCH v10 10/17] arm/xen: Get event-channel irq through HVM_PARAM when booting with ACPI Julien Grall
2016-04-01 15:49 ` [PATCH v10 11/17] ARM: XEN: Move xen_early_init() before efi_init() Shannon Zhao
2016-04-06 12:35 ` Julien Grall
2016-04-01 15:49 ` [PATCH v10 12/17] ARM64: ACPI: Check if it runs on Xen to enable or disable ACPI Shannon Zhao
2016-04-01 15:49 ` [PATCH v10 13/17] ARM: Xen: Document UEFI support on Xen ARM virtual platforms Shannon Zhao
2016-04-01 15:49 ` [PATCH v10 14/17] XEN: EFI: Move x86 specific codes to architecture directory Shannon Zhao
2016-04-01 15:49 ` [PATCH v10 15/17] ARM64: XEN: Add a function to initialize Xen specific UEFI runtime services Shannon Zhao
2016-04-01 15:49 ` [PATCH v10 16/17] FDT: Add a helper to get the subnode by given name Shannon Zhao
2016-04-01 15:49 ` [PATCH v10 17/17] Xen: EFI: Parse DT parameters for Xen specific UEFI Shannon Zhao
2016-04-06 11:32 ` [PATCH v10 00/17] Add ACPI support for Xen Dom0 on ARM64 Julien Grall
2016-04-07 1:39 ` Shannon Zhao
2016-04-07 10:34 ` Julien Grall
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