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xen/pvh: Split CONFIG_XEN_PVH into CONFIG_PVH and CONFIG_XEN_PVH 

In order to pave the way for hypervisors other than Xen to use the PVH
entry point for VMs, we need to factor the PVH entry code into Xen specific
and hypervisor agnostic components. The first step in doing that, is to
create a new config option for PVH entry that can be enabled
independently from CONFIG_XEN.

Signed-off-by: Maran Wilson <maran.wilson@oracle.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Acked-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
This commit is contained in:
Maran Wilson 2018-12-10 11:07:28 -08:00 committed by Boris Ostrovsky
parent 40e020c129
commit 7733607fb3
3 changed files with 9 additions and 2 deletions
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6
arch/x86/Kconfig
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@ -796,6 +796,12 @@ config KVM_GUEST
underlying device model, the host provides the guest with
timing infrastructure such as time of day, and system time
config PVH
bool "Support for running PVH guests"
---help---
This option enables the PVH entry point for guest virtual machines
as specified in the x86/HVM direct boot ABI.
config KVM_DEBUG_FS
bool "Enable debug information for KVM Guests in debugfs"
depends on KVM_GUEST && DEBUG_FS

2
arch/x86/kernel/head_64.S
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@ -386,7 +386,7 @@ NEXT_PAGE(early_dynamic_pgts)
.data
#if defined(CONFIG_XEN_PV) || defined(CONFIG_XEN_PVH)
#if defined(CONFIG_XEN_PV) || defined(CONFIG_PVH)
NEXT_PGD_PAGE(init_top_pgt)
.quad level3_ident_pgt - __START_KERNEL_map + _KERNPG_TABLE_NOENC
.org init_top_pgt + L4_PAGE_OFFSET*8, 0

3
arch/x86/xen/Kconfig
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@ -74,6 +74,7 @@ config XEN_DEBUG_FS
Enabling this option may incur a significant performance overhead.
config XEN_PVH
bool "Support for running as a PVH guest"
bool "Support for running as a Xen PVH guest"
depends on XEN && XEN_PVHVM && ACPI
select PVH
def_bool n