Re: [Xen-devel] [PATCH v3 05/17] libxl/arm: Generate static ACPI DSDT table

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Tue, Jul 12, 2016 at 11:50:32AM +0800, Shannon Zhao wrote:
> 
> 
> On 2016/7/7 23:52, Wei Liu wrote:
> > On Tue, Jul 05, 2016 at 11:12:35AM +0800, Shannon Zhao wrote:
> >> > From: Shannon Zhao <shannon.zhao@xxxxxxxxxx>
> >> > 
> >> > It uses static DSDT table like the way x86 uses. Currently the DSDT
> >> > table only contains processor device objects and it generates the
> >> > maximal objects which so far is 128.
> >> > 
> >> > Signed-off-by: Shannon Zhao <shannon.zhao@xxxxxxxxxx>
> >> > ---
> >> >  tools/libacpi/Makefile        | 15 ++++++++++++-
> >> >  tools/libacpi/mk_dsdt.c       | 51 
> >> > ++++++++++++++++++++++++++++++++-----------
> >> >  tools/libxl/Makefile          |  5 ++++-
> >> >  tools/libxl/libxl_arm_acpi.c  |  5 +++++
> >> >  xen/include/public/arch-arm.h |  3 +++
> >> >  5 files changed, 64 insertions(+), 15 deletions(-)
> >> > 
> >> > diff --git a/tools/libacpi/Makefile b/tools/libacpi/Makefile
> >> > index 4068d9a..0401810 100644
> >> > --- a/tools/libacpi/Makefile
> >> > +++ b/tools/libacpi/Makefile
> >> > @@ -22,6 +22,7 @@ MK_DSDT = $(ACPI_BUILD_DIR)/mk_dsdt
> >> >  # Sources to be generated
> >> >  C_SRC = $(ACPI_BUILD_DIR)/dsdt_anycpu.c $(ACPI_BUILD_DIR)/dsdt_15cpu.c 
> >> >  C_SRC += $(ACPI_BUILD_DIR)/dsdt_anycpu_qemu_xen.c 
> >> > $(ACPI_BUILD_DIR)/dsdt_pvh.c
> >> > +C_SRC += $(ACPI_BUILD_DIR)/dsdt_anycpu_arm.c
> >> >  H_SRC = $(ACPI_BUILD_DIR)/ssdt_s3.h $(ACPI_BUILD_DIR)/ssdt_s4.h 
> >> > $(ACPI_BUILD_DIR)/ssdt_pm.h $(ACPI_BUILD_DIR)/ssdt_tpm.h
> >> >  
> >> >  vpath iasl $(PATH)
> >> > @@ -35,7 +36,7 @@ $(H_SRC): $(ACPI_BUILD_DIR)/%.h: %.asl iasl
> >> >          cd $(CURDIR)
> >> >  
> >> >  $(MK_DSDT): mk_dsdt.c
> >> > -        $(HOSTCC) $(HOSTCFLAGS) $(CFLAGS_xeninclude) -o $@ mk_dsdt.c
> >> > +        $(HOSTCC) $(HOSTCFLAGS) $(CFLAGS_xeninclude) -D__XEN_TOOLS__ -o 
> >> > $@ mk_dsdt.c
> > Why is this needed? Which unstable hypervisor interface you need in
> > order to build this?
> It needs GUEST_MAX_VCPUS in mk_dsdt.c while the GUEST_MAX_VCPUS is
> defined under #if defined(__XEN__) || defined(__XEN_TOOLS__) in
> xen/include/public/arch-arm.h
> 

OK. Let me elaborate a bit on this.

The two macros basically imply everything enclosed in them is subject to
change. I guess I can live with this because this is not a public facing
interface for library users.

Can you ack or nack my assessment?

Wei.

> Thanks,
> -- 
> Shannon
> 

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