Re: [Xen-devel] [RFC XEN PATCH v3 08/39] xen/pmem: hide NFIT and deny access to PMEM from Dom0

[Chao Peng <chao.p.peng@xxxxxxxxxxxxxxx>]

On Mon, 2017-09-11 at 12:37 +0800, Haozhong Zhang wrote:
> ... to avoid the inference with the PMEM driver and management
> utilities in Dom0.
> 
> Signed-off-by: Haozhong Zhang <haozhong.zhang@xxxxxxxxx>
> ---
> Cc: Jan Beulich <jbeulich@xxxxxxxx>
> Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
> Cc: Gang Wei <gang.wei@xxxxxxxxx>
> Cc: Shane Wang <shane.wang@xxxxxxxxx>
> ---
>  xen/arch/x86/acpi/power.c |  7 +++++++
>  xen/arch/x86/dom0_build.c |  5 +++++
>  xen/arch/x86/shutdown.c   |  3 +++
>  xen/arch/x86/tboot.c      |  4 ++++
>  xen/common/kexec.c        |  3 +++
>  xen/common/pmem.c         | 21 +++++++++++++++++++++
>  xen/drivers/acpi/nfit.c   | 21 +++++++++++++++++++++
>  xen/include/xen/acpi.h    |  2 ++
>  xen/include/xen/pmem.h    | 13 +++++++++++++
>  9 files changed, 79 insertions(+)
> 
> diff --git a/xen/arch/x86/acpi/power.c b/xen/arch/x86/acpi/power.c
> index 1e4e5680a7..d135715a49 100644
> --- a/xen/arch/x86/acpi/power.c
> +++ b/xen/arch/x86/acpi/power.c
> @@ -178,6 +178,10 @@ static int enter_state(u32 state)
>  
>      freeze_domains();
>  
> +#ifdef CONFIG_NVDIMM_PMEM
> +    acpi_nfit_reinstate();
> +#endif

I don't understand why reinstate is needed for NFIT table? Will it  be
searched by firmware on shutdown / entering power state?

Chao

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
https://lists.xen.org/xen-devel