diff mbox series

[RFC,V2,20/37] hw/acpi: Update GED _EVT method AML with cpu scan

Message ID 20230926100436.28284-21-salil.mehta@huawei.com (mailing list archive)
State New, archived
Headers show
Series Support of Virtual CPU Hotplug for ARMv8 Arch | expand

Commit Message

Salil Mehta Sept. 26, 2023, 10:04 a.m. UTC 
OSPM evaluates _EVT method to map the event. The cpu hotplug event eventually
results in start of the cpu scan. Scan figures out the cpu and the kind of
event(plug/unplug) and notifies it back to the guest.

The change in this patch updates the GED AML _EVT method with the call to
\\_SB.CPUS.CSCN which will do above.

Co-developed-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Co-developed-by: Keqian Zhu <zhukeqian1@huawei.com>
Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
---
 hw/acpi/generic_event_device.c | 4 ++++
 include/hw/acpi/cpu_hotplug.h  | 2 ++
 2 files changed, 6 insertions(+)

Comments

Gavin Shan Sept. 28, 2023, 11:35 p.m. UTC | #1 
On 9/26/23 20:04, Salil Mehta wrote:
> OSPM evaluates _EVT method to map the event. The cpu hotplug event eventually
> results in start of the cpu scan. Scan figures out the cpu and the kind of
> event(plug/unplug) and notifies it back to the guest.
> 
> The change in this patch updates the GED AML _EVT method with the call to
> \\_SB.CPUS.CSCN which will do above.
> 
> Co-developed-by: Salil Mehta <salil.mehta@huawei.com>
> Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
> Co-developed-by: Keqian Zhu <zhukeqian1@huawei.com>
> Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
> Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
> ---
>   hw/acpi/generic_event_device.c | 4 ++++
>   include/hw/acpi/cpu_hotplug.h  | 2 ++
>   2 files changed, 6 insertions(+)
> 

Reviewed-by: Gavin Shan <gshan@redhat.com>

> diff --git a/hw/acpi/generic_event_device.c b/hw/acpi/generic_event_device.c
> index b84602b238..ad252e6a91 100644
> --- a/hw/acpi/generic_event_device.c
> +++ b/hw/acpi/generic_event_device.c
> @@ -108,6 +108,10 @@ void build_ged_aml(Aml *table, const char *name, HotplugHandler *hotplug_dev,
>                   aml_append(if_ctx, aml_call0(MEMORY_DEVICES_CONTAINER "."
>                                                MEMORY_SLOT_SCAN_METHOD));
>                   break;
> +            case ACPI_GED_CPU_HOTPLUG_EVT:
> +                aml_append(if_ctx, aml_call0(ACPI_CPU_CONTAINER "."
> +                                             ACPI_CPU_SCAN_METHOD));
> +                break;
>               case ACPI_GED_PWR_DOWN_EVT:
>                   aml_append(if_ctx,
>                              aml_notify(aml_name(ACPI_POWER_BUTTON_DEVICE),
> diff --git a/include/hw/acpi/cpu_hotplug.h b/include/hw/acpi/cpu_hotplug.h
> index 48b291e45e..ef631750b4 100644
> --- a/include/hw/acpi/cpu_hotplug.h
> +++ b/include/hw/acpi/cpu_hotplug.h
> @@ -20,6 +20,8 @@
>   #include "hw/acpi/cpu.h"
>   
>   #define ACPI_CPU_HOTPLUG_REG_LEN 12
> +#define ACPI_CPU_SCAN_METHOD "CSCN"
> +#define ACPI_CPU_CONTAINER "\\_SB.CPUS"
>   
>   typedef struct AcpiCpuHotplug {
>       Object *device;
Salil Mehta Oct. 16, 2023, 11:01 p.m. UTC | #2 
> From: Gavin Shan <gshan@redhat.com>
> Sent: Friday, September 29, 2023 12:36 AM
> To: Salil Mehta <salil.mehta@huawei.com>; qemu-devel@nongnu.org; qemu-
> arm@nongnu.org
> Cc: maz@kernel.org; jean-philippe@linaro.org; Jonathan Cameron
> <jonathan.cameron@huawei.com>; lpieralisi@kernel.org;
> peter.maydell@linaro.org; richard.henderson@linaro.org;
> imammedo@redhat.com; andrew.jones@linux.dev; david@redhat.com;
> philmd@linaro.org; eric.auger@redhat.com; will@kernel.org; ardb@kernel.org;
> oliver.upton@linux.dev; pbonzini@redhat.com; mst@redhat.com;
> rafael@kernel.org; borntraeger@linux.ibm.com; alex.bennee@linaro.org;
> linux@armlinux.org.uk; darren@os.amperecomputing.com;
> ilkka@os.amperecomputing.com; vishnu@os.amperecomputing.com;
> karl.heubaum@oracle.com; miguel.luis@oracle.com; salil.mehta@opnsrc.net;
> zhukeqian <zhukeqian1@huawei.com>; wangxiongfeng (C)
> <wangxiongfeng2@huawei.com>; wangyanan (Y) <wangyanan55@huawei.com>;
> jiakernel2@gmail.com; maobibo@loongson.cn; lixianglai@loongson.cn
> Subject: Re: [PATCH RFC V2 20/37] hw/acpi: Update GED _EVT method AML with
> cpu scan
> 
> On 9/26/23 20:04, Salil Mehta wrote:
> > OSPM evaluates _EVT method to map the event. The cpu hotplug event
> eventually
> > results in start of the cpu scan. Scan figures out the cpu and the kind
> of
> > event(plug/unplug) and notifies it back to the guest.
> >
> > The change in this patch updates the GED AML _EVT method with the call to
> > \\_SB.CPUS.CSCN which will do above.
> >
> > Co-developed-by: Salil Mehta <salil.mehta@huawei.com>
> > Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
> > Co-developed-by: Keqian Zhu <zhukeqian1@huawei.com>
> > Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
> > Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
> > ---
> >   hw/acpi/generic_event_device.c | 4 ++++
> >   include/hw/acpi/cpu_hotplug.h  | 2 ++
> >   2 files changed, 6 insertions(+)
> >
> 
> Reviewed-by: Gavin Shan <gshan@redhat.com>

Thanks. Already reviewed as part of architecture agnostic patch-set

https://lore.kernel.org/qemu-devel/4764CF47-47CA-4685-805C-BBE6310BE164@oracle.com/T/#m40b72077ad8c797597588600bff5e5abca44150c

cheers
Salil.
diff mbox series

Patch

diff --git a/hw/acpi/generic_event_device.c b/hw/acpi/generic_event_device.c
index b84602b238..ad252e6a91 100644
--- a/hw/acpi/generic_event_device.c
+++ b/hw/acpi/generic_event_device.c
@@ -108,6 +108,10 @@  void build_ged_aml(Aml *table, const char *name, HotplugHandler *hotplug_dev,
                 aml_append(if_ctx, aml_call0(MEMORY_DEVICES_CONTAINER "."
                                              MEMORY_SLOT_SCAN_METHOD));
                 break;
+            case ACPI_GED_CPU_HOTPLUG_EVT:
+                aml_append(if_ctx, aml_call0(ACPI_CPU_CONTAINER "."
+                                             ACPI_CPU_SCAN_METHOD));
+                break;
             case ACPI_GED_PWR_DOWN_EVT:
                 aml_append(if_ctx,
                            aml_notify(aml_name(ACPI_POWER_BUTTON_DEVICE),
diff --git a/include/hw/acpi/cpu_hotplug.h b/include/hw/acpi/cpu_hotplug.h
index 48b291e45e..ef631750b4 100644
--- a/include/hw/acpi/cpu_hotplug.h
+++ b/include/hw/acpi/cpu_hotplug.h
@@ -20,6 +20,8 @@ 
 #include "hw/acpi/cpu.h"
 
 #define ACPI_CPU_HOTPLUG_REG_LEN 12
+#define ACPI_CPU_SCAN_METHOD "CSCN"
+#define ACPI_CPU_CONTAINER "\\_SB.CPUS"
 
 typedef struct AcpiCpuHotplug {
     Object *device;