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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH v3 4/5] ARM: Introduce get_hwdom_madt_size in gic_hw_operations
Hi,
On 05/09/17 18:14, mjaggi@xxxxxxxxxxxxxxxxxx wrote:
> From: Manish Jaggi <mjaggi@xxxxxxxxxx>
>
> estimate_acpi_efi_size needs to be updated to provide correct size of
> hardware domains MADT, which now adds ITS information as well.
>
> Introducing gic_get_hwdom_madt_size.
>
> Signed-off-by: Manish Jaggi <mjaggi@xxxxxxxxxx>
> ---
> xen/arch/arm/domain_build.c | 7 +------
> xen/arch/arm/gic-v2.c | 6 ++++++
> xen/arch/arm/gic-v3.c | 18 ++++++++++++++++++
> xen/arch/arm/gic.c | 11 +++++++++++
> xen/include/asm-arm/gic.h | 3 +++
> 5 files changed, 39 insertions(+), 6 deletions(-)
>
> diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
> index 1bec4fa..5739ea4 100644
> --- a/xen/arch/arm/domain_build.c
> +++ b/xen/arch/arm/domain_build.c
> @@ -1806,12 +1806,7 @@ static int estimate_acpi_efi_size(struct domain *d,
> struct kernel_info *kinfo)
> acpi_size = ROUNDUP(sizeof(struct acpi_table_fadt), 8);
> acpi_size += ROUNDUP(sizeof(struct acpi_table_stao), 8);
>
> - madt_size = sizeof(struct acpi_table_madt)
> - + sizeof(struct acpi_madt_generic_interrupt) * d->max_vcpus
> - + sizeof(struct acpi_madt_generic_distributor);
> - if ( d->arch.vgic.version == GIC_V3 )
> - madt_size += sizeof(struct acpi_madt_generic_redistributor)
> - * d->arch.vgic.nr_regions;
> + madt_size = gic_get_hwdom_madt_size(d);
> acpi_size += ROUNDUP(madt_size, 8);
>
> addr = acpi_os_get_root_pointer();
> diff --git a/xen/arch/arm/gic-v2.c b/xen/arch/arm/gic-v2.c
> index cbe71a9..737c50a 100644
> --- a/xen/arch/arm/gic-v2.c
> +++ b/xen/arch/arm/gic-v2.c
> @@ -1012,6 +1012,11 @@ static int gicv2_iomem_deny_access(const struct domain
> *d)
> return iomem_deny_access(d, mfn, mfn + nr);
> }
>
> +static unsigned long gicv2_get_hwdom_madt_size(const struct domain *d)
> +{
> + return 0;
> +}
Nothing too critical, but this looks a bit confusing, as the size of the
GIC part of the MADT isn't 0 even for GICv2. So either you rename it to
something containing "additional" or the like or you do what it says on
the tin and return the per-VCPU size and the size for the distributor
here (at the cost of copying this to the GICv3 code).
Cheers,
Andre.
> +
> #ifdef CONFIG_ACPI
> static int gicv2_make_hwdom_madt(const struct domain *d, u32 offset)
> {
> @@ -1248,6 +1253,7 @@ const static struct gic_hw_operations gicv2_ops = {
> .read_apr = gicv2_read_apr,
> .make_hwdom_dt_node = gicv2_make_hwdom_dt_node,
> .make_hwdom_madt = gicv2_make_hwdom_madt,
> + .get_hwdom_madt_size = gicv2_get_hwdom_madt_size,
> .map_hwdom_extra_mappings = gicv2_map_hwdown_extra_mappings,
> .iomem_deny_access = gicv2_iomem_deny_access,
> .do_LPI = gicv2_do_LPI,
> diff --git a/xen/arch/arm/gic-v3.c b/xen/arch/arm/gic-v3.c
> index b3d605d..3eb67f2 100644
> --- a/xen/arch/arm/gic-v3.c
> +++ b/xen/arch/arm/gic-v3.c
> @@ -1406,6 +1406,18 @@ static int gicv3_make_hwdom_madt(const struct domain
> *d, u32 offset)
> return table_len;
> }
>
> +static unsigned long gicv3_get_hwdom_madt_size(const struct domain *d)
> +{
> + unsigned long size;
> + size = sizeof(struct acpi_madt_generic_redistributor)
> + * d->arch.vgic.nr_regions;
> +
> + size += vgic_v3_its_count(d)
> + * sizeof(struct acpi_madt_generic_translator);
> +
> + return size;
> +}
> +
> static int __init
> gic_acpi_parse_madt_cpu(struct acpi_subtable_header *header,
> const unsigned long end)
> @@ -1597,6 +1609,11 @@ static int gicv3_make_hwdom_madt(const struct domain
> *d, u32 offset)
> {
> return 0;
> }
> +
> +static u32 gicv3_get_hwdom_madt_size(const struct domain *d)
> +{
> + return 0;
> +}
> #endif
>
> /* Set up the GIC */
> @@ -1698,6 +1715,7 @@ static const struct gic_hw_operations gicv3_ops = {
> .secondary_init = gicv3_secondary_cpu_init,
> .make_hwdom_dt_node = gicv3_make_hwdom_dt_node,
> .make_hwdom_madt = gicv3_make_hwdom_madt,
> + .get_hwdom_madt_size = gicv3_get_hwdom_madt_size,
> .iomem_deny_access = gicv3_iomem_deny_access,
> .do_LPI = gicv3_do_LPI,
> };
> diff --git a/xen/arch/arm/gic.c b/xen/arch/arm/gic.c
> index 6c803bf..9ffd33a 100644
> --- a/xen/arch/arm/gic.c
> +++ b/xen/arch/arm/gic.c
> @@ -851,6 +851,17 @@ int gic_make_hwdom_madt(const struct domain *d, u32
> offset)
> return gic_hw_ops->make_hwdom_madt(d, offset);
> }
>
> +unsigned long gic_get_hwdom_madt_size(const struct domain *d)
> +{
> + unsigned long madt_size;
> + madt_size = sizeof(struct acpi_table_madt)
> + + sizeof(struct acpi_madt_generic_interrupt) * d->max_vcpus
> + + sizeof(struct acpi_madt_generic_distributor)
> + + gic_hw_ops->get_hwdom_madt_size(d);
> +
> + return madt_size;
> +}
> +
> int gic_iomem_deny_access(const struct domain *d)
> {
> return gic_hw_ops->iomem_deny_access(d);
> diff --git a/xen/include/asm-arm/gic.h b/xen/include/asm-arm/gic.h
> index 6203dc5..3acdd6d 100644
> --- a/xen/include/asm-arm/gic.h
> +++ b/xen/include/asm-arm/gic.h
> @@ -365,6 +365,8 @@ struct gic_hw_operations {
> int (*make_hwdom_madt)(const struct domain *d, u32 offset);
> /* Map extra GIC MMIO, irqs and other hw stuffs to the hardware domain.
> */
> int (*map_hwdom_extra_mappings)(struct domain *d);
> + /* Query the size of hardware domain madt table */
> + unsigned long (*get_hwdom_madt_size)(const struct domain *d);
> /* Deny access to GIC regions */
> int (*iomem_deny_access)(const struct domain *d);
> /* Handle LPIs, which require special handling */
> @@ -376,6 +378,7 @@ int gic_make_hwdom_dt_node(const struct domain *d,
> const struct dt_device_node *gic,
> void *fdt);
> int gic_make_hwdom_madt(const struct domain *d, u32 offset);
> +unsigned long gic_get_hwdom_madt_size(const struct domain *d);
> int gic_map_hwdom_extra_mappings(struct domain *d);
> int gic_iomem_deny_access(const struct domain *d);
>
>
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