Re: [Xen-devel] [PATCH RFC 28/35] arm: acpi map acpi tables in dom0

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Wed, 4 Feb 2015, parth.dixit@xxxxxxxxxx wrote:
> From: Parth Dixit <parth.dixit@xxxxxxxxxx>
> 
> map acpi tables described in uefi table to dom0 address space
> 
> Signed-off-by: Parth Dixit <parth.dixit@xxxxxxxxxx>
> ---
>  xen/arch/arm/arm64/acpi/arm-core.c | 43 
> ++++++++++++++++++++++++++++++++++++++
>  xen/arch/arm/domain_build.c        |  4 ++++
>  xen/include/asm-arm/acpi.h         |  1 +
>  3 files changed, 48 insertions(+)
> 
> diff --git a/xen/arch/arm/arm64/acpi/arm-core.c 
> b/xen/arch/arm/arm64/acpi/arm-core.c
> index cc11fce..6707e4c 100644
> --- a/xen/arch/arm/arm64/acpi/arm-core.c
> +++ b/xen/arch/arm/arm64/acpi/arm-core.c
> @@ -31,6 +31,7 @@
>  
>  #include <asm/cputype.h>
>  #include <asm/acpi.h>
> +#include <asm/p2m.h>
>  
>  /*
>   * We never plan to use RSDT on arm/arm64 as its deprecated in spec but this
> @@ -241,6 +242,48 @@ static int __init acpi_parse_fadt(struct 
> acpi_table_header *table)
>         return 0;
>  }
>  
> +int acpi_map_tables(struct domain *d)
> +{
> +    int i,res;
> +    u64 addr, size;
> +
> +    /* map rsdp table */
> +    addr = acpi_os_get_root_pointer();

I cannot seem to find the patch that actually adds the rsdp to the mini
dtb. It would make sense to have that change in this patch.


> +    size = sizeof(struct acpi_table_rsdp);
> +
> +    res = map_ram_regions(d,
> +                            paddr_to_pfn(addr & PAGE_MASK),
> +                            DIV_ROUND_UP(size, PAGE_SIZE),
> +                            paddr_to_pfn(addr & PAGE_MASK));
> +    if ( res )
> +    {
> +         printk(XENLOG_ERR "Unable to map 0x%"PRIx64
> +                " - 0x%"PRIx64" in domain \n",
> +                addr & PAGE_MASK, PAGE_ALIGN(addr + size) - 1);
> +         return res;
> +    }
> +
> +    for( i = 0; i < acpi_gbl_root_table_list.count; i++ )
> +    {
> +        addr = acpi_gbl_root_table_list.tables[i].address;
> +        size = acpi_gbl_root_table_list.tables[i].length;
> +
> +        res = map_ram_regions(d,
> +                            paddr_to_pfn(addr & PAGE_MASK),
> +                            DIV_ROUND_UP(size, PAGE_SIZE),
> +                            paddr_to_pfn(addr & PAGE_MASK));
> +        if ( res )
> +        {
> +             printk(XENLOG_ERR "Unable to map 0x%"PRIx64
> +                    " - 0x%"PRIx64" in domain \n",
> +                    addr & PAGE_MASK, PAGE_ALIGN(addr + size) - 1);
> +             return res;
> +        }
> +    }
> +
> +    return 0;
> +}
> +
>  /*
>   * acpi_boot_table_init() called from setup_arch(), always.
>   *      1. find RSDP and get its address, and then find XSDT
> diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
> index 49eb52a..a504064 100644
> --- a/xen/arch/arm/domain_build.c
> +++ b/xen/arch/arm/domain_build.c
> @@ -1278,6 +1278,10 @@ static int map_acpi_regions(struct domain *d)
>  {
>      int res;
>  
> +    res = acpi_map_tables(d);
> +    if ( res )
> +        return res;
> +
>      res = acpi_map_mmio(d);
>      if ( res )
>          return res;
> diff --git a/xen/include/asm-arm/acpi.h b/xen/include/asm-arm/acpi.h
> index 01ce28d..4f52cd6 100644
> --- a/xen/include/asm-arm/acpi.h
> +++ b/xen/include/asm-arm/acpi.h
> @@ -108,5 +108,6 @@ static inline void acpi_disable_pci(void)
>  #define MAX_GIC_CPU_INTERFACE 65535
>  #define MAX_GIC_DISTRIBUTOR   1                /* should be the same as 
> MAX_GIC_NR */
>  extern int __init acpi_gic_init(void);
> +int acpi_map_tables(struct domain *d);
>  
>  #endif /*_ASM_ARM_ACPI_H*/
> -- 
> 1.9.1
> 
> 
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> 

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