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x86/xen: add CONFIG_XEN_PV to Kconfig

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All code to support Xen PV will get under this new option. For the
beginning, check for it in the common code.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
This commit is contained in:
Vitaly Kuznetsov 2017-03-14 18:35:38 +01:00 committed by Juergen Gross
parent 52519f2af0
commit 5e57f1d607
3 changed files with 22 additions and 7 deletions
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4
arch/x86/kernel/cpu/hypervisor.c
View File

@ -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,

2
arch/x86/kernel/process_64.c
View File

@ -446,7 +446,7 @@ __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

23
arch/x86/xen/Kconfig
View File

@ -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
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
help
Support running as a Xen PV Dom0 guest.
config XEN_PVHVM
def_bool y
bool "Xen PVHVM guest support"
default y
depends on XEN && PCI && X86_LOCAL_APIC
help
Support running as a Xen PVHVM guest.
config XEN_512GB
bool "Limit Xen pv-domain memory to 512GB"
depends on XEN && X86_64
depends on XEN_PV && X86_64
default y
help
Limit paravirtualized user domains to 512GB of RAM.