Re: [Xen-devel] [PATCH] hvmloader, libxl: use the correct ACPI settings depending on device model

[Paul Durrant <Paul.Durrant@xxxxxxxxxx>]

> -----Original Message-----
> From: Xen-devel [mailto:xen-devel-bounces@xxxxxxxxxxxxx] On Behalf Of
> Igor Druzhinin
> Sent: 19 July 2017 22:20
> To: xen-devel@xxxxxxxxxxxxx
> Cc: Igor Druzhinin <igor.druzhinin@xxxxxxxxxx>; Ian Jackson
> <Ian.Jackson@xxxxxxxxxx>; Wei Liu <wei.liu2@xxxxxxxxxx>;
> jbeulich@xxxxxxxx; Andrew Cooper <Andrew.Cooper3@xxxxxxxxxx>
> Subject: [Xen-devel] [PATCH] hvmloader, libxl: use the correct ACPI settings
> depending on device model
> 
> We need to choose ACPI tables and ACPI IO port location
> properly depending on the device model version we are running.
> Previously, this decision was made by BIOS type specific
> code in hvmloader, e.g. always load QEMU traditional specific
> tables if it's ROMBIOS and always load QEMU Xen specific
> tables if it's SeaBIOS.
> 
> This change saves this behavior but adds an additional way
> (xenstore key) to specify the correct device model if we
> happen to run a non-default one. Toolstack bit makes use of it.
> 
> Signed-off-by: Igor Druzhinin <igor.druzhinin@xxxxxxxxxx>

Reviewed-by: Paul Durrant <paul.durrant@xxxxxxxxxx>

> ---
>  tools/firmware/hvmloader/hvmloader.c |  2 --
>  tools/firmware/hvmloader/ovmf.c      |  2 ++
>  tools/firmware/hvmloader/rombios.c   |  2 ++
>  tools/firmware/hvmloader/seabios.c   |  3 +++
>  tools/firmware/hvmloader/util.c      | 24 ++++++++++++++++++++++++
>  tools/libxl/libxl_create.c           |  2 ++
>  6 files changed, 33 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/firmware/hvmloader/hvmloader.c
> b/tools/firmware/hvmloader/hvmloader.c
> index f603f68..db11ab1 100644
> --- a/tools/firmware/hvmloader/hvmloader.c
> +++ b/tools/firmware/hvmloader/hvmloader.c
> @@ -405,8 +405,6 @@ int main(void)
>          }
> 
>          acpi_enable_sci();
> -
> -        hvm_param_set(HVM_PARAM_ACPI_IOPORTS_LOCATION, 1);
>      }
> 
>      init_vm86_tss();
> diff --git a/tools/firmware/hvmloader/ovmf.c
> b/tools/firmware/hvmloader/ovmf.c
> index 4ff7f1d..ebadc64 100644
> --- a/tools/firmware/hvmloader/ovmf.c
> +++ b/tools/firmware/hvmloader/ovmf.c
> @@ -127,6 +127,8 @@ static void ovmf_acpi_build_tables(void)
>          .dsdt_15cpu_len = 0
>      };
> 
> +    hvm_param_set(HVM_PARAM_ACPI_IOPORTS_LOCATION, 1);
> +
>      hvmloader_acpi_build_tables(&config, ACPI_PHYSICAL_ADDRESS);
>  }
> 
> diff --git a/tools/firmware/hvmloader/rombios.c
> b/tools/firmware/hvmloader/rombios.c
> index 56b39b7..31a7c65 100644
> --- a/tools/firmware/hvmloader/rombios.c
> +++ b/tools/firmware/hvmloader/rombios.c
> @@ -181,6 +181,8 @@ static void rombios_acpi_build_tables(void)
>          .dsdt_15cpu_len = dsdt_15cpu_len,
>      };
> 
> +    hvm_param_set(HVM_PARAM_ACPI_IOPORTS_LOCATION, 0);
> +
>      hvmloader_acpi_build_tables(&config, ACPI_PHYSICAL_ADDRESS);
>  }
> 
> diff --git a/tools/firmware/hvmloader/seabios.c
> b/tools/firmware/hvmloader/seabios.c
> index 870576a..5878eff 100644
> --- a/tools/firmware/hvmloader/seabios.c
> +++ b/tools/firmware/hvmloader/seabios.c
> @@ -28,6 +28,7 @@
> 
>  #include <acpi2_0.h>
>  #include <libacpi.h>
> +#include <xen/hvm/params.h>
> 
>  extern unsigned char dsdt_anycpu_qemu_xen[];
>  extern int dsdt_anycpu_qemu_xen_len;
> @@ -99,6 +100,8 @@ static void seabios_acpi_build_tables(void)
>          .dsdt_15cpu_len = 0,
>      };
> 
> +    hvm_param_set(HVM_PARAM_ACPI_IOPORTS_LOCATION, 1);
> +
>      hvmloader_acpi_build_tables(&config, rsdp);
>      add_table(rsdp);
>  }
> diff --git a/tools/firmware/hvmloader/util.c
> b/tools/firmware/hvmloader/util.c
> index db5f240..45b777c 100644
> --- a/tools/firmware/hvmloader/util.c
> +++ b/tools/firmware/hvmloader/util.c
> @@ -31,6 +31,9 @@
>  #include <xen/hvm/hvm_xs_strings.h>
>  #include <xen/hvm/params.h>
> 
> +extern unsigned char dsdt_anycpu_qemu_xen[], dsdt_anycpu[],
> dsdt_15cpu[];
> +extern int dsdt_anycpu_qemu_xen_len, dsdt_anycpu_len,
> dsdt_15cpu_len;
> +
>  /*
>   * Check whether there exists overlap in the specified memory range.
>   * Returns true if exists, else returns false.
> @@ -897,6 +900,27 @@ void hvmloader_acpi_build_tables(struct acpi_config
> *config,
>      /* Allocate and initialise the acpi info area. */
>      mem_hole_populate_ram(ACPI_INFO_PHYSICAL_ADDRESS >>
> PAGE_SHIFT, 1);
> 
> +    /* If the device model is specified switch to the corresponding tables */
> +    s = xenstore_read("platform/device-model", "");
> +    if ( !strncmp(s, "qemu_xen_traditional", 21) )
> +    {
> +        config->dsdt_anycpu = dsdt_anycpu;
> +        config->dsdt_anycpu_len = dsdt_anycpu_len;
> +        config->dsdt_15cpu = dsdt_15cpu;
> +        config->dsdt_15cpu_len = dsdt_15cpu_len;
> +
> +        hvm_param_set(HVM_PARAM_ACPI_IOPORTS_LOCATION, 0);
> +    }
> +    else if ( !strncmp(s, "qemu_xen", 10) )
> +    {
> +        config->dsdt_anycpu = dsdt_anycpu_qemu_xen;
> +        config->dsdt_anycpu_len = dsdt_anycpu_qemu_xen_len;
> +        config->dsdt_15cpu = NULL;
> +        config->dsdt_15cpu_len = 0;
> +
> +        hvm_param_set(HVM_PARAM_ACPI_IOPORTS_LOCATION, 1);
> +    }
> +
>      config->lapic_base_address = LAPIC_BASE_ADDRESS;
>      config->lapic_id = acpi_lapic_id;
>      config->ioapic_base_address = ioapic_base_address;
> diff --git a/tools/libxl/libxl_create.c b/tools/libxl/libxl_create.c
> index 1158303..8dc8186 100644
> --- a/tools/libxl/libxl_create.c
> +++ b/tools/libxl/libxl_create.c
> @@ -472,6 +472,8 @@ int libxl__domain_build(libxl__gc *gc,
>                                     info->u.hvm.mmio_hole_memkb << 10);
>              }
>          }
> +        localents[i++] = "platform/device-model";
> +        localents[i++] = (char *) libxl_device_model_version_to_string(info-
> >device_model_version);
> 
>          break;
>      case LIBXL_DOMAIN_TYPE_PV:
> --
> 2.7.4
> 
> 
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