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SubjectRe: [PATCH v2 03/21] x86/xen: add CONFIG_XEN_PV to Kconfig
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On 02/03/17 18:53, Vitaly Kuznetsov wrote:
> All code to supprot Xen PV will get under this new option. For the

s/supprot/support/

> beginning, check for it in the common code.
>
> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
> ---
> arch/x86/kernel/cpu/hypervisor.c | 4 +++-
> arch/x86/kernel/process_64.c | 2 +-
> arch/x86/xen/Kconfig | 23 ++++++++++++++++++-----
> 3 files changed, 22 insertions(+), 7 deletions(-)
>
> diff --git a/arch/x86/kernel/cpu/hypervisor.c b/arch/x86/kernel/cpu/hypervisor.c
> index a77f18d..ce6fcc3 100644
> --- a/arch/x86/kernel/cpu/hypervisor.c
> +++ b/arch/x86/kernel/cpu/hypervisor.c
> @@ -28,8 +28,10 @@
>
> static const __initconst struct hypervisor_x86 * const hypervisors[] =
> {
> -#ifdef CONFIG_XEN
> +#ifdef CONFIG_XEN_PV
> &x86_hyper_xen_pv,
> +#endif
> +#ifdef CONFIG_XEN_PVHVM
> &x86_hyper_xen_hvm,
> #endif
> &x86_hyper_vmware,
> diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
> index a61e141..5e8d129 100644
> --- a/arch/x86/kernel/process_64.c
> +++ b/arch/x86/kernel/process_64.c
> @@ -438,7 +438,7 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
> task_thread_info(prev_p)->flags & _TIF_WORK_CTXSW_PREV))
> __switch_to_xtra(prev_p, next_p, tss);
>
> -#ifdef CONFIG_XEN
> +#ifdef CONFIG_XEN_PV
> /*
> * On Xen PV, IOPL bits in pt_regs->flags have no effect, and
> * current_pt_regs()->flags may not match the current task's
> diff --git a/arch/x86/xen/Kconfig b/arch/x86/xen/Kconfig
> index 76b6dbd..c387560 100644
> --- a/arch/x86/xen/Kconfig
> +++ b/arch/x86/xen/Kconfig
> @@ -6,7 +6,6 @@ config XEN
> bool "Xen guest support"
> depends on PARAVIRT
> select PARAVIRT_CLOCK
> - select XEN_HAVE_PVMMU
> select XEN_HAVE_VPMU
> depends on X86_64 || (X86_32 && X86_PAE)
> depends on X86_LOCAL_APIC && X86_TSC
> @@ -15,18 +14,32 @@ config XEN
> kernel to boot in a paravirtualized environment under the
> Xen hypervisor.
>
> +config XEN_PV
> + bool "Xen PV guest support"
> + default y
> + depends on XEN

select XEN_HAVE_PVMMU is missing ...

> + help
> + Support running as a Xen PV guest.
> +
> config XEN_DOM0
> - def_bool y
> - depends on XEN && PCI_XEN && SWIOTLB_XEN
> + bool "Xen PV Dom0 support"
> + default y
> + depends on XEN_PV && PCI_XEN && SWIOTLB_XEN
> depends on X86_IO_APIC && ACPI && PCI
> + select XEN_HAVE_PVMMU

... and can be dropped here


Juergen

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