On 28/03/2019 14:49, Jan Beulich wrote:
> In order to be able to initialize x2APIC mode we need to parse
> respective ACPI tables early. Split amd_iov_detect() into two parts for
> this purpose, and call the initial part earlier on.
>
> Signed-off-by: Jan Beulich <jbeul...@suse.com>
Reviewed-by: Andrew Cooper <andrew.coop...@citrix.com>
> --- a/xen/include/asm-x86/acpi.h
> +++ b/xen/include/asm-x86/acpi.h
> @@ -26,6 +26,7 @@
> #include <acpi/pdc_intel.h>
> #include <acpi/acconfig.h>
> #include <acpi/actbl.h>
> +#include <xen/errno.h>
>
> #define COMPILER_DEPENDENT_INT64 long long
> #define COMPILER_DEPENDENT_UINT64 unsigned long long
> @@ -145,6 +146,15 @@ extern u32 pmtmr_ioport;
> extern unsigned int pmtmr_width;
>
> int acpi_dmar_init(void);
> +int acpi_ivrs_init(void);
> +
> +static inline int acpi_iommu_init(void)
> +{
> + int ret = acpi_dmar_init();
> +
> + return ret == -ENODEV ? acpi_ivrs_init() : ret;
> +}
> +
I suppose we really don't have any better option here than to try for
all APCI tables we may be interested in. I certainly can't think of any
identifying information we could usefully switch() on instead.
~Andrew
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