diff options
| author | Zhenzhong Duan <zhenzhong.duan@oracle.com> | 2019-07-11 20:02:09 +0800 |
|---|---|---|
| committer | Juergen Gross <jgross@suse.com> | 2019-07-17 08:09:58 +0200 |
| commit | 30978346372e5c43a652cfbd4533c6bd5427c33b (patch) | |
| tree | 0fb7e6a976d391af1469f7c4e210bef06e7ef5cb /arch/x86/kernel/jailhouse.c | |
| parent | 1b37683cda0217305837fd1b79e7c57104d4f983 (diff) | |
x86: Add "nopv" parameter to disable PV extensions
In virtualization environment, PV extensions (drivers, interrupts,
timers, etc) are enabled in the majority of use cases which is the
best option.
However, in some cases (kexec not fully working, benchmarking)
we want to disable PV extensions. We have "xen_nopv" for that purpose
but only for XEN. For a consistent admin experience a common command
line parameter "nopv" set across all PV guest implementations is a
better choice.
There are guest types which just won't work without PV extensions,
like Xen PV, Xen PVH and jailhouse. add a "ignore_nopv" member to
struct hypervisor_x86 set to true for those guest types and call
the detect functions only if nopv is false or ignore_nopv is true.
Suggested-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Stefano Stabellini <sstabellini@kernel.org>
Signed-off-by: Juergen Gross <jgross@suse.com>
Diffstat (limited to 'arch/x86/kernel/jailhouse.c')
| -rw-r--r-- | arch/x86/kernel/jailhouse.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/kernel/jailhouse.c b/arch/x86/kernel/jailhouse.c index 6857b4577f17..3ad34f01de2a 100644 --- a/arch/x86/kernel/jailhouse.c +++ b/arch/x86/kernel/jailhouse.c @@ -217,4 +217,5 @@ const struct hypervisor_x86 x86_hyper_jailhouse __refconst = { .detect = jailhouse_detect, .init.init_platform = jailhouse_init_platform, .init.x2apic_available = jailhouse_x2apic_available, + .ignore_nopv = true, }; |