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Re: [PATCH v18 1/6] hw/arm/virt: Introduce RAS platform version and RAS
From: |
Peter Maydell |
Subject: |
Re: [PATCH v18 1/6] hw/arm/virt: Introduce RAS platform version and RAS machine option |
Date: |
Fri, 27 Sep 2019 15:02:02 +0100 |
On Fri, 6 Sep 2019 at 09:33, Xiang Zheng <address@hidden> wrote:
>
> From: Dongjiu Geng <address@hidden>
>
> Support RAS Virtualization feature since version 4.2, disable it by
> default in the old versions. Also add a machine option which allows user
> to enable it explicitly.
>
> Signed-off-by: Dongjiu Geng <address@hidden>
> Signed-off-by: Xiang Zheng <address@hidden>
> ---
> hw/arm/virt.c | 33 +++++++++++++++++++++++++++++++++
> include/hw/arm/virt.h | 2 ++
> 2 files changed, 35 insertions(+)
>
> diff --git a/hw/arm/virt.c b/hw/arm/virt.c
> index d74538b021..e0451433c8 100644
> --- a/hw/arm/virt.c
> +++ b/hw/arm/virt.c
> @@ -1783,6 +1783,20 @@ static void virt_set_its(Object *obj, bool value,
> Error **errp)
> vms->its = value;
> }
>
> +static bool virt_get_ras(Object *obj, Error **errp)
> +{
> + VirtMachineState *vms = VIRT_MACHINE(obj);
> +
> + return vms->ras;
> +}
> +
> +static void virt_set_ras(Object *obj, bool value, Error **errp)
> +{
> + VirtMachineState *vms = VIRT_MACHINE(obj);
> +
> + vms->ras = value;
> +}
> +
> static char *virt_get_gic_version(Object *obj, Error **errp)
> {
> VirtMachineState *vms = VIRT_MACHINE(obj);
> @@ -2026,6 +2040,19 @@ static void virt_instance_init(Object *obj)
> "Valid values are none and smmuv3",
> NULL);
>
> + if (vmc->no_ras) {
> + vms->ras = false;
> + } else {
> + /* Default disallows RAS instantiation */
> + vms->ras = false;
> + object_property_add_bool(obj, "ras", virt_get_ras,
> + virt_set_ras, NULL);
> + object_property_set_description(obj, "ras",
> + "Set on/off to enable/disable "
> + "RAS instantiation",
> + NULL);
> + }
For a property which is disabled by default, you don't need
to have a separate flag in the VirtMachineClass struct.
Those are only needed for properties where we need the old machine
types to have the property be 'off' but new machine types
need to default to it be 'on'. Since vms->ras is false
by default anyway, you can just have this part:
> + /* Default disallows RAS instantiation */
> + vms->ras = false;
> + object_property_add_bool(obj, "ras", virt_get_ras,
> + virt_set_ras, NULL);
> + object_property_set_description(obj, "ras",
> + "Set on/off to enable/disable "
> + "RAS instantiation",
> + NULL);
Compare the 'vms->secure' flag and associated property
for an example of this.
> vms->irqmap = a15irqmap;
>
> virt_flash_create(vms);
> @@ -2058,8 +2085,14 @@ DEFINE_VIRT_MACHINE_AS_LATEST(4, 2)
>
> static void virt_machine_4_1_options(MachineClass *mc)
> {
> + VirtMachineClass *vmc = VIRT_MACHINE_CLASS(OBJECT_CLASS(mc));
> +
> virt_machine_4_2_options(mc);
> compat_props_add(mc->compat_props, hw_compat_4_1, hw_compat_4_1_len);
> + /* Disable memory recovery feature for 4.1 as RAS support was
> + * introduced with 4.2.
> + */
> + vmc->no_ras = true;
> }
> DEFINE_VIRT_MACHINE(4, 1)
thanks
-- PMM
- [Qemu-devel] [PATCH v18 0/6] Add ARMv8 RAS virtualization support in QEMU, Xiang Zheng, 2019/09/06
- [Qemu-devel] [PATCH v18 4/6] KVM: Move hwpoison page related functions into include/sysemu/kvm_int.h, Xiang Zheng, 2019/09/06
- [Qemu-devel] [PATCH v18 1/6] hw/arm/virt: Introduce RAS platform version and RAS machine option, Xiang Zheng, 2019/09/06
- Re: [PATCH v18 1/6] hw/arm/virt: Introduce RAS platform version and RAS machine option,
Peter Maydell <=
- [Qemu-devel] [PATCH v18 2/6] docs: APEI GHES generation and CPER record description, Xiang Zheng, 2019/09/06
- [Qemu-devel] [PATCH v18 5/6] target-arm: kvm64: inject synchronous External Abort, Xiang Zheng, 2019/09/06
- [Qemu-devel] [PATCH v18 6/6] target-arm: kvm64: handle SIGBUS signal from kernel or KVM, Xiang Zheng, 2019/09/06
- [Qemu-devel] [PATCH v18 3/6] ACPI: Add APEI GHES table generation support, Xiang Zheng, 2019/09/06