| Message ID | 14a8c523b24c87959941e905bd60933a91144bc7.1715761386.git.Sergiy_Kibrik@epam.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | x86: make cpu virtualization support configurable | expand |
On Wed, 15 May 2024, Sergiy Kibrik wrote: > Add new option to make altp2m code inclusion optional. > Currently altp2m support provided for VT-d only, so option is dependant on VMX. > > No functional change intended. > > Signed-off-by: Sergiy Kibrik <Sergiy_Kibrik@epam.com> > CC: Tamas K Lengyel <tamas@tklengyel.com> > --- > xen/arch/x86/Kconfig | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/xen/arch/x86/Kconfig b/xen/arch/x86/Kconfig > index 8c9f8431f0..2872b031a7 100644 > --- a/xen/arch/x86/Kconfig > +++ b/xen/arch/x86/Kconfig > @@ -358,6 +358,11 @@ config REQUIRE_NX > was unavailable. However, if enabled, Xen will no longer boot on > any CPU which is lacking NX support. > > +config ALTP2M > + bool "Alternate P2M support" > + def_bool y > + depends on VMX && EXPERT I think we need a small help text here, something like Alternate-p2m allows a guest to manage multiple p2m guest physical "memory views" (as opposed to a single p2m). Useful for memory introspection. > endmenu > > source "common/Kconfig" > -- > 2.25.1 >
On 15.05.2024 11:08, Sergiy Kibrik wrote: > --- a/xen/arch/x86/Kconfig > +++ b/xen/arch/x86/Kconfig > @@ -358,6 +358,11 @@ config REQUIRE_NX > was unavailable. However, if enabled, Xen will no longer boot on > any CPU which is lacking NX support. > > +config ALTP2M > + bool "Alternate P2M support" > + def_bool y Since you have "bool" already, here you mean "default". > + depends on VMX && EXPERT This doesn't look right. Typical distro builds will be with EXPERT=n. Such builds would suddenly end up without altp2m support then. What I think you mean is a conditional prompt. I.e. overall config ALTP2M bool "Alternate P2M support" if EXPERT default y depends on VMX help ... Jan
> Currently altp2m support provided for VT-d only, so option is dependant on VMX.
No clue what is meant by "support provided for VT-d only". Altp2m has
nothing to do with VT-d. It would be more accurate to say it's only
implemented for Intel EPT.
Tamas
diff --git a/xen/arch/x86/Kconfig b/xen/arch/x86/Kconfig index 8c9f8431f0..2872b031a7 100644 --- a/xen/arch/x86/Kconfig +++ b/xen/arch/x86/Kconfig @@ -358,6 +358,11 @@ config REQUIRE_NX was unavailable. However, if enabled, Xen will no longer boot on any CPU which is lacking NX support. +config ALTP2M + bool "Alternate P2M support" + def_bool y + depends on VMX && EXPERT + endmenu source "common/Kconfig"
Add new option to make altp2m code inclusion optional. Currently altp2m support provided for VT-d only, so option is dependant on VMX. No functional change intended. Signed-off-by: Sergiy Kibrik <Sergiy_Kibrik@epam.com> CC: Tamas K Lengyel <tamas@tklengyel.com> --- xen/arch/x86/Kconfig | 5 +++++ 1 file changed, 5 insertions(+)