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| author | Mukesh Rathor <mukesh.rathor@oracle.com> | 2013-12-31 17:16:25 +0100 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2014-01-06 16:44:24 +0100 |
| commit | 4e903a20da51ed2329c1b9c182dba74f47ac2ca8 (patch) | |
| tree | bd27e708fdf5e25debe627ff3e16c58ad97f86fc /arch/x86/xen/Kconfig | |
| parent | xen/pvh: Piggyback on PVHVM XenBus. (diff) | |
| download | linux-4e903a20da51ed2329c1b9c182dba74f47ac2ca8.tar.xz linux-4e903a20da51ed2329c1b9c182dba74f47ac2ca8.zip | |
xen/pvh: Support ParaVirtualized Hardware extensions (v3).
PVH allows PV linux guest to utilize hardware extended capabilities,
such as running MMU updates in a HVM container.
The Xen side defines PVH as (from docs/misc/pvh-readme.txt,
with modifications):
"* the guest uses auto translate:
- p2m is managed by Xen
- pagetables are owned by the guest
- mmu_update hypercall not available
* it uses event callback and not vlapic emulation,
* IDT is native, so set_trap_table hcall is also N/A for a PVH guest.
For a full list of hcalls supported for PVH, see pvh_hypercall64_table
in arch/x86/hvm/hvm.c in xen. From the ABI prespective, it's mostly a
PV guest with auto translate, although it does use hvm_op for setting
callback vector."
Use .ascii and .asciz to define xen feature string. Note, the PVH
string must be in a single line (not multiple lines with \) to keep the
assembler from putting null char after each string before \.
This patch allows it to be configured and enabled.
We also use introduce the 'XEN_ELFNOTE_SUPPORTED_FEATURES' ELF note to
tell the hypervisor that 'hvm_callback_vector' is what the kernel
needs. We can not put it in 'XEN_ELFNOTE_FEATURES' as older hypervisor
parse fields they don't understand as errors and refuse to load
the kernel. This work-around fixes the problem.
Signed-off-by: Mukesh Rathor <mukesh.rathor@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Diffstat (limited to 'arch/x86/xen/Kconfig')
| -rw-r--r-- | arch/x86/xen/Kconfig | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/xen/Kconfig b/arch/x86/xen/Kconfig index e7d05900efac..d88bfd66aaab 100644 --- a/arch/x86/xen/Kconfig +++ b/arch/x86/xen/Kconfig @@ -53,6 +53,6 @@ config XEN_DEBUG_FS config XEN_PVH bool "Support for running as a PVH guest" - depends on X86_64 && XEN && BROKEN + depends on X86_64 && XEN select XEN_PVHVM def_bool n |