[PATCH v9 07/21] virt: geniezone: Add vm capability check

[Yi-De Wu (吳一德)]

On Thu, 2024-02-01 at 10:44 +0100, AngeloGioacchino Del Regno wrote:
> Il 29/01/24 09:32, Yi-De Wu ha scritto:
> > From: "Yingshiuan Pan" <yingshiuan.pan at mediatek.com>
> > 
> > Inquire the `capability support` on GenieZone hypervisor.
> > Example:
> > `GZVM_CAP_PROTECTED_VM` or `GZVM_CAP_VM_GPA_SIZE`.
> > 
> > Signed-off-by: Yingshiuan Pan <yingshiuan.pan at mediatek.com>
> > Signed-off-by: Jerry Wang <ze-yu.wang at mediatek.com>
> > Signed-off-by: kevenny hsieh <kevenny.hsieh at mediatek.com>
> > Signed-off-by: Liju Chen <liju-clr.chen at mediatek.com>
> > Signed-off-by: Yi-De Wu <yi-de.wu at mediatek.com>
> > ---
> >   arch/arm64/geniezone/gzvm_arch_common.h |   2 +
> >   arch/arm64/geniezone/vm.c               | 122
> > ++++++++++++++++++++++++
> >   drivers/virt/geniezone/gzvm_main.c      |  27 ++++++
> >   drivers/virt/geniezone/gzvm_vm.c        |  21 ++++
> >   include/linux/gzvm_drv.h                |   5 +
> >   include/uapi/linux/gzvm.h               |  31 ++++++
> >   6 files changed, 208 insertions(+)
> > 
> > diff --git a/arch/arm64/geniezone/gzvm_arch_common.h
> > b/arch/arm64/geniezone/gzvm_arch_common.h
> > index 2f66e496dfae..383af0829f11 100644
> > --- a/arch/arm64/geniezone/gzvm_arch_common.h
> > +++ b/arch/arm64/geniezone/gzvm_arch_common.h
> > @@ -13,6 +13,7 @@ enum {
> >   	GZVM_FUNC_DESTROY_VM = 1,
> >   	GZVM_FUNC_SET_MEMREGION = 4,
> >   	GZVM_FUNC_PROBE = 12,
> > +	GZVM_FUNC_ENABLE_CAP = 13,
> 
> GZVM_FUNC_PROBE  = 12,
> GZVM_FUNC_ENABLE_CAP,
> 

Given that this is an API from the kernel to the hypervisor, it may be
utilized with various toolchains. Our intention is to explicitly assign
values to prevent any unexpected compiler behavior. For further
details, we'd like to refer to the discussion below.

https://lore.kernel.org/all/20200318125003.GA2727094@kroah.com/

> >   	NR_GZVM_FUNC,
> >   };
> >   
> 
> Regards,
> Angelo
>