Re: [Qemu-devel] [PATCH 4/4] acpi: unify rsdp generation

["Michael S. Tsirkin" <mst@redhat.com>]

On Fri, Jun 05, 2015 at 10:47:16AM +0800, Shannon Zhao wrote:
> 
> 
> On 2015/6/5 0:21, Michael S. Tsirkin wrote:
> > Now that both i386 and arm use v2 tables,
> > use common code for both.
> > 
> > Warning: untested.
> > 
> > Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
> > ---
> >  include/hw/acpi/aml-build.h |  2 ++
> >  hw/acpi/aml-build.c         | 45 +++++++++++++++++++++++++++++++++++++++++++++
> >  hw/arm/virt-acpi-build.c    | 31 +------------------------------
> >  hw/i386/acpi-build.c        | 41 -----------------------------------------
> >  4 files changed, 48 insertions(+), 71 deletions(-)
> > 
> > diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h
> > index 0a00402..ae169fa 100644
> > --- a/include/hw/acpi/aml-build.h
> > +++ b/include/hw/acpi/aml-build.h
> > @@ -289,5 +289,7 @@ void
> >  build_rsdt(GArray *table_data, GArray *linker, GArray *table_offsets);
> >  void
> >  build_xsdt(GArray *table_data, GArray *linker, GArray *table_offsets);
> > +GArray *
> > +build_rsdp(GArray *rsdp_table, GArray *linker, unsigned rsdt, unsigned xsdt);
> >  
> >  #endif
> > diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
> > index d0e52c4..d0bd953 100644
> > --- a/hw/acpi/aml-build.c
> > +++ b/hw/acpi/aml-build.c
> > @@ -1237,3 +1237,48 @@ build_xsdt(GArray *table_data, GArray *linker, GArray *table_offsets)
> >  {
> >      build_sdt(table_data, linker, table_offsets, "XSDT", sizeof(uint64_t));
> >  }
> > +
> > +GArray *
> > +build_rsdp(GArray *rsdp_table, GArray *linker, unsigned rsdt, unsigned xsdt)
> > +{
> > +    AcpiRsdpDescriptor *rsdp = acpi_data_push(rsdp_table, sizeof *rsdp);
> > +
> > +    bios_linker_loader_alloc(linker, ACPI_BUILD_RSDP_FILE, 16,
> > +                             true /* fseg memory */);
> > +
> > +    memcpy(&rsdp->signature, "RSD PTR ", 8);
> > +    memcpy(rsdp->oem_id, ACPI_BUILD_APPNAME6, 6);
> > +
> > +    rsdp->revision = 0x02;
> > +    rsdp->length = cpu_to_le32(sizeof *rsdp);
> > +
> > +    if (rsdt) {
> > +        rsdp->rsdt_physical_address = cpu_to_le32(rsdt);
> > +        /* Address to be filled by Guest linker */
> > +        bios_linker_loader_add_pointer(linker, ACPI_BUILD_RSDP_FILE,
> > +                                       ACPI_BUILD_TABLE_FILE,
> > +                                       rsdp_table, &rsdp->rsdt_physical_address,
> > +                                       sizeof rsdp->rsdt_physical_address);
> > +    }
> > +
> > +    if (xsdt) {
> > +        rsdp->xsdt_physical_address = cpu_to_le32(xsdt);
> > +        bios_linker_loader_add_pointer(linker, ACPI_BUILD_RSDP_FILE,
> > +                                       ACPI_BUILD_TABLE_FILE,
> > +                                       rsdp_table, &rsdp->xsdt_physical_address,
> > +                                       sizeof rsdp->xsdt_physical_address);
> > +    }
> > +    rsdp->checksum = 0;
> > +    /* Checksum to be filled by Guest linker */
> > +    bios_linker_loader_add_checksum(linker, ACPI_BUILD_RSDP_FILE,
> > +                                    rsdp, rsdp, offsetof(AcpiRsdpDescriptor, length),
> > +                                    &rsdp->checksum);
> > +
> > +    rsdp->extended_checksum = 0;
> > +    /* Checksum to be filled by Guest linker */
> > +    bios_linker_loader_add_checksum(linker, ACPI_BUILD_RSDP_FILE,
> > +                                    rsdp, rsdp, sizeof *rsdp,
> > +                                    &rsdp->extended_checksum);
> > +
> > +    return rsdp_table;
> > +}
> > diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
> > index 42c8dd9..c164f65 100644
> > --- a/hw/arm/virt-acpi-build.c
> > +++ b/hw/arm/virt-acpi-build.c
> > @@ -304,35 +304,6 @@ static void acpi_dsdt_add_pci(Aml *scope, const MemMapEntry *memmap, int irq)
> >      aml_append(scope, dev);
> >  }
> >  
> > -/* RSDP */
> > -static GArray *
> > -build_rsdp(GArray *rsdp_table, GArray *linker, unsigned rsdt)
> > -{
> > -    AcpiRsdpDescriptor *rsdp = acpi_data_push(rsdp_table, sizeof *rsdp);
> > -
> > -    bios_linker_loader_alloc(linker, ACPI_BUILD_RSDP_FILE, 16,
> > -                             true /* fseg memory */);
> > -
> > -    memcpy(&rsdp->signature, "RSD PTR ", sizeof(rsdp->signature));
> > -    memcpy(rsdp->oem_id, ACPI_BUILD_APPNAME6, sizeof(rsdp->oem_id));
> > -    rsdp->length = cpu_to_le32(sizeof(*rsdp));
> > -    rsdp->revision = 0x02;
> > -
> > -    /* Point to RSDT */
> > -    rsdp->rsdt_physical_address = cpu_to_le32(rsdt);
> > -    /* Address to be filled by Guest linker */
> > -    bios_linker_loader_add_pointer(linker, ACPI_BUILD_RSDP_FILE,
> > -                                   ACPI_BUILD_TABLE_FILE,
> > -                                   rsdp_table, &rsdp->rsdt_physical_address,
> > -                                   sizeof rsdp->rsdt_physical_address);
> > -    rsdp->checksum = 0;
> > -    /* Checksum to be filled by Guest linker */
> > -    bios_linker_loader_add_checksum(linker, ACPI_BUILD_RSDP_FILE,
> > -                                    rsdp, rsdp, sizeof *rsdp, &rsdp->checksum);
> > -
> > -    return rsdp_table;
> > -}
> > -
> >  static void
> >  build_mcfg(GArray *table_data, GArray *linker, VirtGuestInfo *guest_info)
> >  {
> > @@ -532,7 +503,7 @@ void virt_acpi_build(VirtGuestInfo *guest_info, AcpiBuildTables *tables)
> >      build_rsdt(tables_blob, tables->linker, table_offsets);
> >  
> >      /* RSDP is in FSEG memory, so allocate it separately */
> > -    build_rsdp(tables->rsdp, tables->linker, rsdt);
> > +    build_rsdp(tables->rsdp, tables->linker, rsdt, 0);
> >  
> 
> So ARM virt can use xsdt as well. Maybe could do by another patch on top
> of this.

In fact, there's probably no reason to have an rsdt at all.

But how does one test ARM ACPI code?
Could you upload an image with instructions to the wiki?
http://wiki.qemu.org/System_Images


> >      /* Cleanup memory that's no longer used. */
> >      g_array_free(table_offsets, true);
> > diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
> > index 3551a08..8c6d7f5 100644
> > --- a/hw/i386/acpi-build.c
> > +++ b/hw/i386/acpi-build.c
> > @@ -1592,47 +1592,6 @@ build_dsdt(GArray *table_data, GArray *linker, AcpiMiscInfo *misc)
> >                   misc->dsdt_size, 1);
> >  }
> >  
> > -static GArray *
> > -build_rsdp(GArray *rsdp_table, GArray *linker, unsigned rsdt, unsigned xsdt)
> > -{
> > -    AcpiRsdpDescriptor *rsdp = acpi_data_push(rsdp_table, sizeof *rsdp);
> > -
> > -    bios_linker_loader_alloc(linker, ACPI_BUILD_RSDP_FILE, 16,
> > -                             true /* fseg memory */);
> > -
> > -    memcpy(&rsdp->signature, "RSD PTR ", 8);
> > -    memcpy(rsdp->oem_id, ACPI_BUILD_APPNAME6, 6);
> > -
> > -    rsdp->revision = 0x02;
> > -    rsdp->length = cpu_to_le32(sizeof *rsdp);
> > -
> > -    rsdp->rsdt_physical_address = cpu_to_le32(rsdt);
> > -    /* Address to be filled by Guest linker */
> > -    bios_linker_loader_add_pointer(linker, ACPI_BUILD_RSDP_FILE,
> > -                                   ACPI_BUILD_TABLE_FILE,
> > -                                   rsdp_table, &rsdp->rsdt_physical_address,
> > -                                   sizeof rsdp->rsdt_physical_address);
> > -
> > -    rsdp->xsdt_physical_address = cpu_to_le32(xsdt);
> > -    bios_linker_loader_add_pointer(linker, ACPI_BUILD_RSDP_FILE,
> > -                                   ACPI_BUILD_TABLE_FILE,
> > -                                   rsdp_table, &rsdp->xsdt_physical_address,
> > -                                   sizeof rsdp->xsdt_physical_address);
> > -    rsdp->checksum = 0;
> > -    /* Checksum to be filled by Guest linker */
> > -    bios_linker_loader_add_checksum(linker, ACPI_BUILD_RSDP_FILE,
> > -                                    rsdp, rsdp, offsetof(AcpiRsdpDescriptor, length),
> > -                                    &rsdp->checksum);
> > -
> > -    rsdp->extended_checksum = 0;
> > -    /* Checksum to be filled by Guest linker */
> > -    bios_linker_loader_add_checksum(linker, ACPI_BUILD_RSDP_FILE,
> > -                                    rsdp, rsdp, sizeof *rsdp,
> > -                                    &rsdp->extended_checksum);
> > -
> > -    return rsdp_table;
> > -}
> > -
> >  typedef
> >  struct AcpiBuildState {
> >      /* Copy of table in RAM (for patching). */
> > 
> 
> -- 
> Shannon