Re: [Xen-devel] [Qemu-devel] [PATCH v2] xenfv: set has_acpi_build to false

[Igor Mammedov <imammedo@xxxxxxxxxx>]

On Thu, 27 Oct 2016 14:51:09 +0100
Wei Liu <wei.liu2@xxxxxxxxxx> wrote:

> Xen's toolstack is in charge of building ACPI tables. Skip ACPI table
> building and loading in QEMU by setting has_acpi_build to false for
> xenfv machine.
> 
> This issue is discovered due to direct kernel boot on Xen doesn't boot
> anymore, because the new ACPI tables cause the guest to exceed its
> memory allocation limit.
> 
> Reported-by: Sander Eikelenboom <linux@xxxxxxxxxxxxxx>
> Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
Reviewed-by: Igor Mammedov <imammedo@xxxxxxxxxx>

> ---
> Cc: Igor Mammedov <imammedo@xxxxxxxxxx>
> Cc: Anthony PERARD <anthony.perard@xxxxxxxxxx>
> Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>
> Cc: Sander Eikelenboom <linux@xxxxxxxxxxxxxx>
> ---
>  hw/i386/pc_piix.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
> index a54a468..08596a1 100644
> --- a/hw/i386/pc_piix.c
> +++ b/hw/i386/pc_piix.c
> @@ -1094,10 +1094,14 @@ DEFINE_PC_MACHINE(isapc, "isapc", pc_init_isa,
>  #ifdef CONFIG_XEN
>  static void xenfv_machine_options(MachineClass *m)
>  {
> +    PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
> +
>      m->desc = "Xen Fully-virtualized PC";
>      m->max_cpus = HVM_MAX_VCPUS;
>      m->default_machine_opts = "accel=xen";
>      m->hot_add_cpu = pc_hot_add_cpu;
> +
> +    pcmc->has_acpi_build = false;
>  }
>  
>  DEFINE_PC_MACHINE(xenfv, "xenfv", pc_xen_hvm_init,


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