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    Subject[PATCH] xen/dom0: add XEN_DOM0 config option
    Date
    Allow dom0 to be configured.  Requires more patches to do something useful.

    Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
    ---
    arch/x86/xen/Kconfig | 26 ++++++++++++++++++++++++++
    arch/x86/xen/enlighten.c | 5 +++--
    2 files changed, 29 insertions(+), 2 deletions(-)

    diff --git a/arch/x86/xen/Kconfig b/arch/x86/xen/Kconfig
    index 87b9ab1..e5c141a 100644
    --- a/arch/x86/xen/Kconfig
    +++ b/arch/x86/xen/Kconfig
    @@ -36,3 +36,29 @@ config XEN_DEBUG_FS
    help
    Enable statistics output and various tuning options in debugfs.
    Enabling this option may incur a significant performance overhead.
    +
    +config XEN_DOM0
    + bool "Enable Xen privileged domain support"
    + depends on XEN && X86_IO_APIC && ACPI
    + help
    + The Xen hypervisor requires a privileged domain ("dom0") to
    + actually manage the machine, provide devices drivers, etc.
    + This option enables dom0 support. A dom0 kernel can also
    + run as an unprivileged domU kernel, or a kernel running
    + native on bare hardware.
    +
    +# Dummy symbol since people have come to rely on the PRIVILEGED_GUEST
    +# name in tools.
    +config XEN_PRIVILEGED_GUEST
    + def_bool XEN_DOM0
    +
    +config XEN_PCI_PASSTHROUGH
    + bool #"Enable support for Xen PCI passthrough devices"
    + depends on XEN && PCI
    + help
    + Enable support for passing PCI devices through to
    + unprivileged domains. (COMPLETELY UNTESTED)
    +
    +config XEN_DOM0_PCI
    + def_bool y
    + depends on XEN_DOM0 && PCI
    diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
    index 62d229a..676aaf8 100644
    --- a/arch/x86/xen/enlighten.c
    +++ b/arch/x86/xen/enlighten.c
    @@ -169,9 +169,10 @@ static void __init xen_banner(void)

    printk(KERN_INFO "Booting paravirtualized kernel on %s\n",
    pv_info.name);
    - printk(KERN_INFO "Xen version: %d.%d%s%s\n",
    + printk(KERN_INFO "Xen version: %d.%d%s%s%s\n",
    version >> 16, version & 0xffff, extra.extraversion,
    - xen_feature(XENFEAT_mmu_pt_update_preserve_ad) ? " (preserve-AD)" : "");
    + xen_feature(XENFEAT_mmu_pt_update_preserve_ad) ? " (preserve-AD)" : "",
    + xen_initial_domain() ? " (dom0)" : "");
    }

    static void xen_cpuid(unsigned int *ax, unsigned int *bx,
    --
    1.6.0.6


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