* Re: [PATCH V4 1/5] pvpanic: move pvpanic to misc as common driver
2018-10-31 13:37 [PATCH V4 1/5] pvpanic: move pvpanic to misc as common driver Peng Hao
@ 2018-10-31 7:05 ` Mark Rutland
2018-10-31 12:45 ` Andy Shevchenko
` (4 subsequent siblings)
5 siblings, 0 replies; 11+ messages in thread
From: Mark Rutland @ 2018-10-31 7:05 UTC (permalink / raw)
To: Peng Hao
Cc: robh+dt, arnd, gregkh, andy, dvhart, linux-kernel,
platform-driver-x86, hutao, linux-doc
On Wed, Oct 31, 2018 at 09:37:17PM +0800, Peng Hao wrote:
> move pvpanic.c from drivers/platform/x86 to drivers/misc.
> following patches will use pvpanic device in arm64.
FWIW, the series as a whole looks fine to me, so for all patches:
Acked-by: Mark Rutland <mark.rutland@arm.com>
Thanks,
Mark.
>
> Signed-off-by: Peng Hao <peng.hao2@zte.com.cn>
> ---
> drivers/misc/Kconfig | 7 +++++++
> drivers/misc/Makefile | 1 +
> drivers/{platform/x86 => misc}/pvpanic.c | 0
> drivers/platform/Kconfig | 3 +++
> drivers/platform/Makefile | 1 +
> drivers/platform/x86/Kconfig | 8 --------
> drivers/platform/x86/Makefile | 1 -
> 7 files changed, 12 insertions(+), 9 deletions(-)
> rename drivers/{platform/x86 => misc}/pvpanic.c (100%)
>
> diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
> index 5d71300..ca55c94 100644
> --- a/drivers/misc/Kconfig
> +++ b/drivers/misc/Kconfig
> @@ -499,6 +499,13 @@ config MISC_RTSX
> tristate
> default MISC_RTSX_PCI || MISC_RTSX_USB
>
> +config PVPANIC
> + tristate "pvpanic device support"
> + help
> + This driver provides support for the pvpanic device. pvpanic is
> + a paravirtualized device provided by QEMU; it lets a virtual machine
> + (guest) communicate panic events to the host.
> +
> source "drivers/misc/c2port/Kconfig"
> source "drivers/misc/eeprom/Kconfig"
> source "drivers/misc/cb710/Kconfig"
> diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
> index 20be70c..39dc005 100644
> --- a/drivers/misc/Makefile
> +++ b/drivers/misc/Makefile
> @@ -57,3 +57,4 @@ obj-$(CONFIG_ASPEED_LPC_SNOOP) += aspeed-lpc-snoop.o
> obj-$(CONFIG_PCI_ENDPOINT_TEST) += pci_endpoint_test.o
> obj-$(CONFIG_OCXL) += ocxl/
> obj-$(CONFIG_MISC_RTSX) += cardreader/
> +obj-$(CONFIG_PVPANIC) += pvpanic.o
> diff --git a/drivers/platform/x86/pvpanic.c b/drivers/misc/pvpanic.c
> similarity index 100%
> rename from drivers/platform/x86/pvpanic.c
> rename to drivers/misc/pvpanic.c
> diff --git a/drivers/platform/Kconfig b/drivers/platform/Kconfig
> index d4c2e42..8b64b78 100644
> --- a/drivers/platform/Kconfig
> +++ b/drivers/platform/Kconfig
> @@ -1,3 +1,6 @@
> +if ARM64
> +source "drivers/platform/arm/Kconfig"
> +endif
> if X86
> source "drivers/platform/x86/Kconfig"
> endif
> diff --git a/drivers/platform/Makefile b/drivers/platform/Makefile
> index 4b2ce58..232231c 100644
> --- a/drivers/platform/Makefile
> +++ b/drivers/platform/Makefile
> @@ -3,6 +3,7 @@
> # Makefile for linux/drivers/platform
> #
>
> +obj-$(CONFIG_ARM64) += arm/
> obj-$(CONFIG_X86) += x86/
> obj-$(CONFIG_MELLANOX_PLATFORM) += mellanox/
> obj-$(CONFIG_MIPS) += mips/
> diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
> index ef016e4..a6b412e 100644
> --- a/drivers/platform/x86/Kconfig
> +++ b/drivers/platform/x86/Kconfig
> @@ -1119,14 +1119,6 @@ config INTEL_SMARTCONNECT
> This driver checks to determine whether the device has Intel Smart
> Connect enabled, and if so disables it.
>
> -config PVPANIC
> - tristate "pvpanic device support"
> - depends on ACPI
> - ---help---
> - This driver provides support for the pvpanic device. pvpanic is
> - a paravirtualized device provided by QEMU; it lets a virtual machine
> - (guest) communicate panic events to the host.
> -
> config INTEL_PMC_IPC
> tristate "Intel PMC IPC Driver"
> depends on ACPI
> diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
> index 2ba6cb7..a4ec299 100644
> --- a/drivers/platform/x86/Makefile
> +++ b/drivers/platform/x86/Makefile
> @@ -75,7 +75,6 @@ obj-$(CONFIG_APPLE_GMUX) += apple-gmux.o
> obj-$(CONFIG_INTEL_RST) += intel-rst.o
> obj-$(CONFIG_INTEL_SMARTCONNECT) += intel-smartconnect.o
>
> -obj-$(CONFIG_PVPANIC) += pvpanic.o
> obj-$(CONFIG_ALIENWARE_WMI) += alienware-wmi.o
> obj-$(CONFIG_INTEL_PMC_IPC) += intel_pmc_ipc.o
> obj-$(CONFIG_SILEAD_DMI) += silead_dmi.o
> --
> 1.8.3.1
>
^ permalink raw reply [flat|nested] 11+ messages in thread* Re: [PATCH V4 1/5] pvpanic: move pvpanic to misc as common driver
2018-10-31 13:37 [PATCH V4 1/5] pvpanic: move pvpanic to misc as common driver Peng Hao
2018-10-31 7:05 ` Mark Rutland
@ 2018-10-31 12:45 ` Andy Shevchenko
2018-10-31 13:37 ` [PATCH V4 2/5] misc/pvpanic : convert to SPDX license tags Peng Hao
` (3 subsequent siblings)
5 siblings, 0 replies; 11+ messages in thread
From: Andy Shevchenko @ 2018-10-31 12:45 UTC (permalink / raw)
To: peng.hao2
Cc: Rob Herring, Mark Rutland, Arnd Bergmann, Greg Kroah-Hartman,
Andy Shevchenko, Darren Hart, Linux Kernel Mailing List,
Platform Driver, hutao, Linux Documentation List
On Wed, Oct 31, 2018 at 7:27 AM Peng Hao <peng.hao2@zte.com.cn> wrote:
>
> move pvpanic.c from drivers/platform/x86 to drivers/misc.
> following patches will use pvpanic device in arm64.
> --- a/drivers/platform/Kconfig
> +++ b/drivers/platform/Kconfig
> @@ -1,3 +1,6 @@
> +if ARM64
> +source "drivers/platform/arm/Kconfig"
> +endif
> if X86
> source "drivers/platform/x86/Kconfig"
> endif
> diff --git a/drivers/platform/Makefile b/drivers/platform/Makefile
> index 4b2ce58..232231c 100644
> --- a/drivers/platform/Makefile
> +++ b/drivers/platform/Makefile
> @@ -3,6 +3,7 @@
> # Makefile for linux/drivers/platform
> #
>
> +obj-$(CONFIG_ARM64) += arm/
> obj-$(CONFIG_X86) += x86/
> obj-$(CONFIG_MELLANOX_PLATFORM) += mellanox/
> obj-$(CONFIG_MIPS) += mips/
I'm not sure:
a) how it's related to the rest in this patch (should be split I suppose);
b) how come arm64->arm replacement — are platform drivers independent
from the (ARM) architecture?
--
With Best Regards,
Andy Shevchenko
^ permalink raw reply [flat|nested] 11+ messages in thread* [PATCH V4 2/5] misc/pvpanic : convert to SPDX license tags
2018-10-31 13:37 [PATCH V4 1/5] pvpanic: move pvpanic to misc as common driver Peng Hao
2018-10-31 7:05 ` Mark Rutland
2018-10-31 12:45 ` Andy Shevchenko
@ 2018-10-31 13:37 ` Peng Hao
2018-10-31 12:46 ` Andy Shevchenko
2018-10-31 13:37 ` [PATCH V4 3/5] misc/pvpanic: add MMIO support Peng Hao
` (2 subsequent siblings)
5 siblings, 1 reply; 11+ messages in thread
From: Peng Hao @ 2018-10-31 13:37 UTC (permalink / raw)
To: robh+dt, mark.rutland, arnd, gregkh, andy, dvhart
Cc: linux-kernel, platform-driver-x86, hutao, linux-doc, Peng Hao
This patch updates license to use SPDX-License-Identifier
instead of verbose license text.
Signed-off-by: Peng Hao <peng.hao2@zte.com.cn>
---
drivers/misc/pvpanic.c | 17 ++---------------
1 file changed, 2 insertions(+), 15 deletions(-)
diff --git a/drivers/misc/pvpanic.c b/drivers/misc/pvpanic.c
index fd86dab..9450376 100644
--- a/drivers/misc/pvpanic.c
+++ b/drivers/misc/pvpanic.c
@@ -1,21 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
- * pvpanic.c - pvpanic Device Support
+ * Pvpanic Device Support
*
* Copyright (C) 2013 Fujitsu.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
--
1.8.3.1
^ permalink raw reply related [flat|nested] 11+ messages in thread* Re: [PATCH V4 2/5] misc/pvpanic : convert to SPDX license tags
2018-10-31 13:37 ` [PATCH V4 2/5] misc/pvpanic : convert to SPDX license tags Peng Hao
@ 2018-10-31 12:46 ` Andy Shevchenko
0 siblings, 0 replies; 11+ messages in thread
From: Andy Shevchenko @ 2018-10-31 12:46 UTC (permalink / raw)
To: peng.hao2
Cc: Rob Herring, Mark Rutland, Arnd Bergmann, Greg Kroah-Hartman,
Andy Shevchenko, Darren Hart, Linux Kernel Mailing List,
Platform Driver, hutao, Linux Documentation List
On Wed, Oct 31, 2018 at 7:27 AM Peng Hao <peng.hao2@zte.com.cn> wrote:
>
> This patch updates license to use SPDX-License-Identifier
> instead of verbose license text.
>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
> Signed-off-by: Peng Hao <peng.hao2@zte.com.cn>
> ---
> drivers/misc/pvpanic.c | 17 ++---------------
> 1 file changed, 2 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/misc/pvpanic.c b/drivers/misc/pvpanic.c
> index fd86dab..9450376 100644
> --- a/drivers/misc/pvpanic.c
> +++ b/drivers/misc/pvpanic.c
> @@ -1,21 +1,8 @@
> +// SPDX-License-Identifier: GPL-2.0+
> /*
> - * pvpanic.c - pvpanic Device Support
> + * Pvpanic Device Support
> *
> * Copyright (C) 2013 Fujitsu.
> - *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License as published by
> - * the Free Software Foundation; either version 2 of the License, or
> - * (at your option) any later version.
> - *
> - * This program is distributed in the hope that it will be useful,
> - * but WITHOUT ANY WARRANTY; without even the implied warranty of
> - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> - * GNU General Public License for more details.
> - *
> - * You should have received a copy of the GNU General Public License
> - * along with this program; if not, write to the Free Software
> - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
> */
>
> #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
> --
> 1.8.3.1
>
--
With Best Regards,
Andy Shevchenko
^ permalink raw reply [flat|nested] 11+ messages in thread
* [PATCH V4 3/5] misc/pvpanic: add MMIO support
2018-10-31 13:37 [PATCH V4 1/5] pvpanic: move pvpanic to misc as common driver Peng Hao
` (2 preceding siblings ...)
2018-10-31 13:37 ` [PATCH V4 2/5] misc/pvpanic : convert to SPDX license tags Peng Hao
@ 2018-10-31 13:37 ` Peng Hao
2018-10-31 12:49 ` Andy Shevchenko
2018-10-31 13:37 ` [PATCH V4 4/5] misc/pvpanic: add support to get pvpanic device info by FDT Peng Hao
2018-10-31 13:37 ` [PATCH V4 5/5] dt-bindings/misc/pvpanic :add document for pvpanic-mmio Peng Hao
5 siblings, 1 reply; 11+ messages in thread
From: Peng Hao @ 2018-10-31 13:37 UTC (permalink / raw)
To: robh+dt, mark.rutland, arnd, gregkh, andy, dvhart
Cc: linux-kernel, platform-driver-x86, hutao, linux-doc, Peng Hao
On some architectures (e.g. arm64), it's preferable to use MMIO, since
this can be used standalone. Add MMIO support to the pvpanic driver.
Signed-off-by: Peng Hao <peng.hao2@zte.com.cn>
---
drivers/misc/pvpanic.c | 20 ++++++++++++++++----
1 file changed, 16 insertions(+), 4 deletions(-)
diff --git a/drivers/misc/pvpanic.c b/drivers/misc/pvpanic.c
index 9450376..d0e28b2 100644
--- a/drivers/misc/pvpanic.c
+++ b/drivers/misc/pvpanic.c
@@ -28,7 +28,7 @@
#define PVPANIC_PANICKED (1 << 0)
-static u16 port;
+static void __iomem *base;
static struct acpi_driver pvpanic_driver = {
.name = "pvpanic",
@@ -44,7 +44,7 @@
static void
pvpanic_send_event(unsigned int event)
{
- outb(event, port);
+ iowrite8(event, base);
}
static int
@@ -64,12 +64,21 @@
static acpi_status
pvpanic_walk_resources(struct acpi_resource *res, void *context)
{
+ struct resource r;
+
switch (res->type) {
case ACPI_RESOURCE_TYPE_END_TAG:
return AE_OK;
case ACPI_RESOURCE_TYPE_IO:
- port = res->data.io.minimum;
+ if (acpi_dev_resource_io(res, &r))
+ base = (void __iomem *) ioport_map(r.start,
+ r.end - r.start + 1);
+ return AE_OK;
+
+ case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
+ if (acpi_dev_resource_memory(res, &r))
+ base = ioremap(r.start, r.end - r.start + 1);
return AE_OK;
default:
@@ -91,7 +100,7 @@ static int pvpanic_add(struct acpi_device *device)
acpi_walk_resources(device->handle, METHOD_NAME__CRS,
pvpanic_walk_resources, NULL);
- if (!port)
+ if (!base)
return -ENODEV;
atomic_notifier_chain_register(&panic_notifier_list,
@@ -105,6 +114,9 @@ static int pvpanic_remove(struct acpi_device *device)
atomic_notifier_chain_unregister(&panic_notifier_list,
&pvpanic_panic_nb);
+ if (base)
+ iounmap(base);
+
return 0;
}
--
1.8.3.1
^ permalink raw reply related [flat|nested] 11+ messages in thread* Re: [PATCH V4 3/5] misc/pvpanic: add MMIO support
2018-10-31 13:37 ` [PATCH V4 3/5] misc/pvpanic: add MMIO support Peng Hao
@ 2018-10-31 12:49 ` Andy Shevchenko
0 siblings, 0 replies; 11+ messages in thread
From: Andy Shevchenko @ 2018-10-31 12:49 UTC (permalink / raw)
To: peng.hao2
Cc: Rob Herring, Mark Rutland, Arnd Bergmann, Greg Kroah-Hartman,
Andy Shevchenko, Darren Hart, Linux Kernel Mailing List,
Platform Driver, hutao, Linux Documentation List
On Wed, Oct 31, 2018 at 7:27 AM Peng Hao <peng.hao2@zte.com.cn> wrote:
>
> On some architectures (e.g. arm64), it's preferable to use MMIO, since
> this can be used standalone. Add MMIO support to the pvpanic driver.
> case ACPI_RESOURCE_TYPE_IO:
> - port = res->data.io.minimum;
> + if (acpi_dev_resource_io(res, &r))
> + base = (void __iomem *) ioport_map(r.start,
> + r.end - r.start + 1);
> + return AE_OK;
> +
> + case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
> + if (acpi_dev_resource_memory(res, &r))
> + base = ioremap(r.start, r.end - r.start + 1);
> return AE_OK;
You need to split this to two changes. First one converts existing
code to use acpi_dev_resource_io() and the rest does the rest.
Moreover, please, read carefully the code of those functions — hint:
they check for resource type themselves.
> + if (base)
Same question. At which conditions the base here can be NULL?
> + iounmap(base);
--
With Best Regards,
Andy Shevchenko
^ permalink raw reply [flat|nested] 11+ messages in thread
* [PATCH V4 4/5] misc/pvpanic: add support to get pvpanic device info by FDT
2018-10-31 13:37 [PATCH V4 1/5] pvpanic: move pvpanic to misc as common driver Peng Hao
` (3 preceding siblings ...)
2018-10-31 13:37 ` [PATCH V4 3/5] misc/pvpanic: add MMIO support Peng Hao
@ 2018-10-31 13:37 ` Peng Hao
2018-10-31 12:50 ` Andy Shevchenko
2018-10-31 12:53 ` Andy Shevchenko
2018-10-31 13:37 ` [PATCH V4 5/5] dt-bindings/misc/pvpanic :add document for pvpanic-mmio Peng Hao
5 siblings, 2 replies; 11+ messages in thread
From: Peng Hao @ 2018-10-31 13:37 UTC (permalink / raw)
To: robh+dt, mark.rutland, arnd, gregkh, andy, dvhart
Cc: linux-kernel, platform-driver-x86, hutao, linux-doc, Peng Hao
By default, when ACPI tables and FDT coexist for ARM64,
current kernel takes precedence over FDT to get device information.
Virt machine in qemu provides both FDT and ACPI table. This patch
increases the way to get information through FDT.
Signed-off-by: Peng Hao <peng.hao2@zte.com.cn>
---
drivers/misc/pvpanic.c | 68 +++++++++++++++++++++++++++++++++++++++++++++++---
1 file changed, 64 insertions(+), 4 deletions(-)
diff --git a/drivers/misc/pvpanic.c b/drivers/misc/pvpanic.c
index d0e28b2..861a0eb 100644
--- a/drivers/misc/pvpanic.c
+++ b/drivers/misc/pvpanic.c
@@ -3,15 +3,18 @@
* Pvpanic Device Support
*
* Copyright (C) 2013 Fujitsu.
+ * Copyright (C) 2018 ZTE.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+#include <linux/acpi.h>
#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/init.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
#include <linux/types.h>
-#include <linux/acpi.h>
MODULE_AUTHOR("Hu Tao <hutao@cn.fujitsu.com>");
MODULE_DESCRIPTION("pvpanic device driver");
@@ -22,7 +25,7 @@
static const struct acpi_device_id pvpanic_device_ids[] = {
{ "QEMU0001", 0 },
- { "", 0 },
+ { "", 0 }
};
MODULE_DEVICE_TABLE(acpi, pvpanic_device_ids);
@@ -60,6 +63,32 @@
.priority = 1, /* let this called before broken drm_fb_helper */
};
+static int pvpanic_mmio_probe(struct platform_device *pdev)
+{
+ struct resource *mem;
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!mem)
+ return -EINVAL;
+
+ base = devm_ioremap_resource(&pdev->dev, mem);
+ if (base == NULL)
+ return -EFAULT;
+
+ atomic_notifier_chain_register(&panic_notifier_list,
+ &pvpanic_panic_nb);
+
+ return 0;
+}
+
+static int pvpanic_mmio_remove(struct platform_device *pdev)
+{
+
+ atomic_notifier_chain_unregister(&panic_notifier_list,
+ &pvpanic_panic_nb);
+
+ return 0;
+}
static acpi_status
pvpanic_walk_resources(struct acpi_resource *res, void *context)
@@ -120,4 +149,35 @@ static int pvpanic_remove(struct acpi_device *device)
return 0;
}
-module_acpi_driver(pvpanic_driver);
+static const struct of_device_id pvpanic_mmio_match[] = {
+ { .compatible = "qemu,pvpanic-mmio", },
+ {}
+};
+
+static struct platform_driver pvpanic_mmio_driver = {
+ .driver = {
+ .name = "pvpanic-mmio",
+ .of_match_table = pvpanic_mmio_match,
+ },
+ .probe = pvpanic_mmio_probe,
+ .remove = pvpanic_mmio_remove,
+};
+
+static int __init pvpanic_mmio_init(void)
+{
+ if (acpi_disabled)
+ return platform_driver_register(&pvpanic_mmio_driver);
+ else
+ return acpi_bus_register_driver(&pvpanic_driver);
+}
+
+static void __exit pvpanic_mmio_exit(void)
+{
+ if (acpi_disabled)
+ platform_driver_unregister(&pvpanic_mmio_driver);
+ else
+ acpi_bus_unregister_driver(&pvpanic_driver);
+}
+
+module_init(pvpanic_mmio_init);
+module_exit(pvpanic_mmio_exit);
--
1.8.3.1
^ permalink raw reply related [flat|nested] 11+ messages in thread* Re: [PATCH V4 4/5] misc/pvpanic: add support to get pvpanic device info by FDT
2018-10-31 13:37 ` [PATCH V4 4/5] misc/pvpanic: add support to get pvpanic device info by FDT Peng Hao
@ 2018-10-31 12:50 ` Andy Shevchenko
2018-10-31 12:53 ` Andy Shevchenko
1 sibling, 0 replies; 11+ messages in thread
From: Andy Shevchenko @ 2018-10-31 12:50 UTC (permalink / raw)
To: peng.hao2
Cc: Rob Herring, Mark Rutland, Arnd Bergmann, Greg Kroah-Hartman,
Andy Shevchenko, Darren Hart, Linux Kernel Mailing List,
Platform Driver, hutao, Linux Documentation List
On Wed, Oct 31, 2018 at 7:27 AM Peng Hao <peng.hao2@zte.com.cn> wrote:
>
> By default, when ACPI tables and FDT coexist for ARM64,
> current kernel takes precedence over FDT to get device information.
> Virt machine in qemu provides both FDT and ACPI table. This patch
> increases the way to get information through FDT.
>
> Signed-off-by: Peng Hao <peng.hao2@zte.com.cn>
> ---
> drivers/misc/pvpanic.c | 68 +++++++++++++++++++++++++++++++++++++++++++++++---
> 1 file changed, 64 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/misc/pvpanic.c b/drivers/misc/pvpanic.c
> index d0e28b2..861a0eb 100644
> --- a/drivers/misc/pvpanic.c
> +++ b/drivers/misc/pvpanic.c
> @@ -3,15 +3,18 @@
> * Pvpanic Device Support
> *
> * Copyright (C) 2013 Fujitsu.
> + * Copyright (C) 2018 ZTE.
> */
>
> #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
>
> +#include <linux/acpi.h>
> #include <linux/kernel.h>
> #include <linux/module.h>
> -#include <linux/init.h>
> +#include <linux/of.h>
> +#include <linux/of_address.h>
> +#include <linux/platform_device.h>
> #include <linux/types.h>
> -#include <linux/acpi.h>
>
> MODULE_AUTHOR("Hu Tao <hutao@cn.fujitsu.com>");
> MODULE_DESCRIPTION("pvpanic device driver");
> @@ -22,7 +25,7 @@
>
> static const struct acpi_device_id pvpanic_device_ids[] = {
> { "QEMU0001", 0 },
> - { "", 0 },
> + { "", 0 }
> };
> MODULE_DEVICE_TABLE(acpi, pvpanic_device_ids);
>
> @@ -60,6 +63,32 @@
> .priority = 1, /* let this called before broken drm_fb_helper */
> };
>
> +static int pvpanic_mmio_probe(struct platform_device *pdev)
> +{
> + struct resource *mem;
> +
> + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + if (!mem)
> + return -EINVAL;
> +
> + base = devm_ioremap_resource(&pdev->dev, mem);
> + if (base == NULL)
> + return -EFAULT;
> +
> + atomic_notifier_chain_register(&panic_notifier_list,
> + &pvpanic_panic_nb);
> +
> + return 0;
> +}
> +
> +static int pvpanic_mmio_remove(struct platform_device *pdev)
> +{
> +
> + atomic_notifier_chain_unregister(&panic_notifier_list,
> + &pvpanic_panic_nb);
> +
> + return 0;
> +}
>
> static acpi_status
> pvpanic_walk_resources(struct acpi_resource *res, void *context)
> @@ -120,4 +149,35 @@ static int pvpanic_remove(struct acpi_device *device)
> return 0;
> }
>
> -module_acpi_driver(pvpanic_driver);
> +static const struct of_device_id pvpanic_mmio_match[] = {
> + { .compatible = "qemu,pvpanic-mmio", },
> + {}
> +};
> +
> +static struct platform_driver pvpanic_mmio_driver = {
> + .driver = {
> + .name = "pvpanic-mmio",
> + .of_match_table = pvpanic_mmio_match,
> + },
> + .probe = pvpanic_mmio_probe,
> + .remove = pvpanic_mmio_remove,
> +};
> +
> +static int __init pvpanic_mmio_init(void)
> +{
> + if (acpi_disabled)
> + return platform_driver_register(&pvpanic_mmio_driver);
> + else
> + return acpi_bus_register_driver(&pvpanic_driver);
> +}
> +
> +static void __exit pvpanic_mmio_exit(void)
> +{
> + if (acpi_disabled)
> + platform_driver_unregister(&pvpanic_mmio_driver);
> + else
> + acpi_bus_unregister_driver(&pvpanic_driver);
> +}
> +
> +module_init(pvpanic_mmio_init);
> +module_exit(pvpanic_mmio_exit);
> --
> 1.8.3.1
>
--
With Best Regards,
Andy Shevchenko
^ permalink raw reply [flat|nested] 11+ messages in thread* Re: [PATCH V4 4/5] misc/pvpanic: add support to get pvpanic device info by FDT
2018-10-31 13:37 ` [PATCH V4 4/5] misc/pvpanic: add support to get pvpanic device info by FDT Peng Hao
2018-10-31 12:50 ` Andy Shevchenko
@ 2018-10-31 12:53 ` Andy Shevchenko
1 sibling, 0 replies; 11+ messages in thread
From: Andy Shevchenko @ 2018-10-31 12:53 UTC (permalink / raw)
To: peng.hao2
Cc: Rob Herring, Mark Rutland, Arnd Bergmann, Greg Kroah-Hartman,
Andy Shevchenko, Darren Hart, Linux Kernel Mailing List,
Platform Driver, hutao, Linux Documentation List
On Wed, Oct 31, 2018 at 7:27 AM Peng Hao <peng.hao2@zte.com.cn> wrote:
>
> By default, when ACPI tables and FDT coexist for ARM64,
> current kernel takes precedence over FDT to get device information.
> Virt machine in qemu provides both FDT and ACPI table. This patch
> increases the way to get information through FDT.
> @@ -3,15 +3,18 @@
> * Copyright (C) 2013 Fujitsu.
> + * Copyright (C) 2018 ZTE.
> +#include <linux/acpi.h>
...
> -#include <linux/acpi.h>
> - { "", 0 },
> + { "", 0 }
These changes regarding to style should go in a separate patch.
> #include <linux/module.h>
> -#include <linux/init.h>
This one also in a separate patch.
So, the one should be split to three AFAICS.
--
With Best Regards,
Andy Shevchenko
^ permalink raw reply [flat|nested] 11+ messages in thread
* [PATCH V4 5/5] dt-bindings/misc/pvpanic :add document for pvpanic-mmio
2018-10-31 13:37 [PATCH V4 1/5] pvpanic: move pvpanic to misc as common driver Peng Hao
` (4 preceding siblings ...)
2018-10-31 13:37 ` [PATCH V4 4/5] misc/pvpanic: add support to get pvpanic device info by FDT Peng Hao
@ 2018-10-31 13:37 ` Peng Hao
5 siblings, 0 replies; 11+ messages in thread
From: Peng Hao @ 2018-10-31 13:37 UTC (permalink / raw)
To: robh+dt, mark.rutland, arnd, gregkh, andy, dvhart
Cc: linux-kernel, platform-driver-x86, hutao, linux-doc, Peng Hao
Add dt-bindings document for "qemu:pvpanic-mmio".
Signed-off-by: Peng Hao <peng.hao2@zte.com.cn>
---
.../devicetree/bindings/misc/pvpanic-mmio.txt | 29 ++++++++++++++++++++++
1 file changed, 29 insertions(+)
create mode 100644 Documentation/devicetree/bindings/misc/pvpanic-mmio.txt
diff --git a/Documentation/devicetree/bindings/misc/pvpanic-mmio.txt b/Documentation/devicetree/bindings/misc/pvpanic-mmio.txt
new file mode 100644
index 0000000..985e907
--- /dev/null
+++ b/Documentation/devicetree/bindings/misc/pvpanic-mmio.txt
@@ -0,0 +1,29 @@
+* QEMU PVPANIC MMIO Configuration bindings
+
+QEMU's emulation / virtualization targets provide the following PVPANIC
+MMIO Configuration interface on the "virt" machine.
+type:
+
+- a read-write, 16-bit wide data register.
+
+QEMU exposes the data register to guests as memory mapped registers.
+
+Required properties:
+
+- compatible: "qemu,pvpanic-mmio".
+- reg: the MMIO region used by the device.
+ * Bytes 0x0 Write panic event to the reg when guest OS panics.
+ * Bytes 0x1 Reserved.
+
+Example:
+
+/ {
+ #size-cells = <0x2>;
+ #address-cells = <0x2>;
+
+ pvpanic-mmio@9060000 {
+ compatible = "qemu,pvpanic-mmio";
+ reg = <0x0 0x9060000 0x0 0x2>;
+ };
+};
+
--
1.8.3.1
^ permalink raw reply related [flat|nested] 11+ messages in thread