On 11/03/17 14:51 +0800, Chao Peng wrote:
> 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
> > ---
> > Cc: Jan Beulich
> > Cc: Andrew Cooper
> > Cc: Gang Wei
> > Cc: Shane Wang
> > ---
> > 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?
I added these acpi_nfit_reinstate()'s akin to acpi_dmar_reinstate().
There is not public documents stating NFIT is not rebuilt during power
state changes.
Haozhong
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