Re: [PATCH v4 31/42] hw/pci-host/gpex-acpi: Add support for dsdt construction for pxb-cxl

[Alex Bennée]

Jonathan Cameron <Jonathan.Cameron@huawei.com> writes:

> This adds code to instantiate the slightly extended ACPI root port
> description in DSDT as per the CXL 2.0 specification.
>
> Basically a cut and paste job from the i386/pc code.

This fails to build on all machines:

  FAILED: qemu-system-mips64el 
  c++ -m64 -mcx16  -o qemu-system-mips64el 
qemu-system-mips64el.p/softmmu_main.c.o <snip> 
subprojects/libvhost-user/libvhost-user.a libmigration.fa libhwcore.fa 
libqom.fa libio.fa libcrypto.fa libauthz.fa libblockdev.fa libblock.fa 
libchardev.fa libqmp.fa @block.syms @qemu.syms 
/usr/lib/x86_64-linux-gnu/libpixman-1.so -lepoxy 
/usr/lib/x86_64-linux-gnu/libcapstone.so 
/usr/lib/x86_64-linux-gnu/libspice-server.so -Xlinker 
--dynamic-list=/home/alex/lsrc/qemu.git/plugins/qemu-plugins.symbols 
/usr/lib/x86_64-linux-gnu/libz.so /usr/lib/x86_64-linux-gnu/libpng16.so 
/usr/lib/x86_64-linux-gnu/libjpeg.so /usr/lib/x86_64-linux-gnu/libgnutls.so 
-lsasl2 /usr/lib/x86_64-linux-gnu/libpmem.so 
/usr/lib/x86_64-linux-gnu/libseccomp.so -lnuma -lgio-2.0 -lgobject-2.0 
-lglib-2.0 -lgio-2.0 -lgobject-2.0 -lglib-2.0 -lrdmacm -libverbs -libumad 
/usr/lib/gcc/x86_64-linux-gnu/10/../../../x86_64-linux-gnu/libzstd.so 
/usr/lib/x86_64-linux-gnu/libslirp.so /usr/lib/x86_64-linux-gnu/libglib-2.0.so 
-lvdeplug /usr/lib/x86_64-linux-gnu/libudev.so 
/usr/lib/x86_64-linux-gnu/libbpf.so /usr/lib/x86_64-linux-gnu/libasound.so 
/usr/lib/x86_64-linux-gnu/libpulse.so -lbrlapi 
/usr/lib/x86_64-linux-gnu/libvirglrenderer.so 
/usr/lib/x86_64-linux-gnu/libusb-1.0.so 
/usr/lib/x86_64-linux-gnu/libusbredirparser.so 
/usr/lib/x86_64-linux-gnu/libcacard.so -lncursesw -ltinfo -pthread 
-lgmodule-2.0 -lglib-2.0 /usr/lib/x86_64-linux-gnu/libgbm.so 
/usr/lib/x86_64-linux-gnu/libgtk-3.so /usr/lib/x86_64-linux-gnu/libgdk-3.so 
/usr/lib/x86_64-linux-gnu/libpangocairo-1.0.so 
/usr/lib/x86_64-linux-gnu/libpango-1.0.so 
/usr/lib/x86_64-linux-gnu/libharfbuzz.so 
/usr/lib/x86_64-linux-gnu/libatk-1.0.so 
/usr/lib/x86_64-linux-gnu/libcairo-gobject.so 
/usr/lib/x86_64-linux-gnu/libcairo.so 
/usr/lib/x86_64-linux-gnu/libgdk_pixbuf-2.0.so 
/usr/lib/x86_64-linux-gnu/libgio-2.0.so 
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so 
/usr/lib/x86_64-linux-gnu/libvte-2.91.so /usr/lib/x86_64-linux-gnu/libX11.so 
@block.syms -lutil -lgio-2.0 -lgobject-2.0 -lglib-2.0 -lgio-2.0 -lgobject-2.0 
-lglib-2.0 -lgmodule-2.0 -lglib-2.0 -lm -lgmodule-2.0 -lglib-2.0 
/usr/lib/x86_64-linux-gnu/libiscsi.so -laio 
/usr/lib/x86_64-linux-gnu/libcurl.so -lgmodule-2.0 -lglib-2.0 -lbz2 
/usr/lib/x86_64-linux-gnu/libacl.so /usr/lib/x86_64-linux-gnu/libgfapi.so 
/usr/lib/x86_64-linux-gnu/libglusterfs.so /usr/lib/x86_64-linux-gnu/libgfrpc.so 
/usr/lib/x86_64-linux-gnu/libgfxdr.so /usr/lib/x86_64-linux-gnu/libuuid.so 
/usr/lib/x86_64-linux-gnu/libnfs.so -lrbd -lrados 
/usr/lib/x86_64-linux-gnu/libssh.so -lstdc++ -Wl,--end-group
  /usr/bin/ld: /lib/x86_64-linux-gnu/libtirpc.so.3: warning: common of 
`rpc_createerr@@GLIBC_2.2.5' overridden by definition from 
/lib/x86_64-linux-gnu/libc.so.6
  /usr/bin/ld: libcommon.fa.p/hw_pci-host_gpex-acpi.c.o: in function 
`acpi_dsdt_add_gpex':
  /home/alex/lsrc/qemu.git/builds/all/../../hw/pci-host/gpex-acpi.c:191: 
undefined reference to `build_cxl_osc_method'
  collect2: error: ld returned 1 exit status
  [1600/2203] Linking target qemu-system-or1k


>
> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> Signed-off-by: Ben Widawsky <ben.widawsky@intel.com>
> ---
>  hw/arm/Kconfig          |  1 +
>  hw/pci-host/gpex-acpi.c | 22 +++++++++++++++++++---
>  2 files changed, 20 insertions(+), 3 deletions(-)
>
> diff --git a/hw/arm/Kconfig b/hw/arm/Kconfig
> index 2e0049196d..3df419fa6d 100644
> --- a/hw/arm/Kconfig
> +++ b/hw/arm/Kconfig
> @@ -29,6 +29,7 @@ config ARM_VIRT
>      select ACPI_APEI
>      select ACPI_VIOT
>      select VIRTIO_MEM_SUPPORTED
> +    select ACPI_CXL
>  
>  config CHEETAH
>      bool
> diff --git a/hw/pci-host/gpex-acpi.c b/hw/pci-host/gpex-acpi.c
> index e7e162a00a..fb60aa517f 100644
> --- a/hw/pci-host/gpex-acpi.c
> +++ b/hw/pci-host/gpex-acpi.c
> @@ -5,6 +5,7 @@
>  #include "hw/pci/pci_bus.h"
>  #include "hw/pci/pci_bridge.h"
>  #include "hw/pci/pcie_host.h"
> +#include "hw/acpi/cxl.h"
>  
>  static void acpi_dsdt_add_pci_route_table(Aml *dev, uint32_t irq)
>  {
> @@ -139,6 +140,7 @@ void acpi_dsdt_add_gpex(Aml *scope, struct GPEXConfig 
> *cfg)
>          QLIST_FOREACH(bus, &bus->child, sibling) {
>              uint8_t bus_num = pci_bus_num(bus);
>              uint8_t numa_node = pci_bus_numa_node(bus);
> +            bool is_cxl;
>  
>              if (!pci_bus_is_root(bus)) {
>                  continue;
> @@ -153,9 +155,19 @@ void acpi_dsdt_add_gpex(Aml *scope, struct GPEXConfig 
> *cfg)
>                  nr_pcie_buses = bus_num;
>              }
>  
> +            is_cxl = pci_bus_is_cxl(bus);
> +
>              dev = aml_device("PC%.02X", bus_num);
> -            aml_append(dev, aml_name_decl("_HID", aml_string("PNP0A08")));
> -            aml_append(dev, aml_name_decl("_CID", aml_string("PNP0A03")));
> +            if (is_cxl) {
> +                struct Aml *pkg = aml_package(2);
> +                aml_append(dev, aml_name_decl("_HID", 
> aml_string("ACPI0016")));
> +                aml_append(pkg, aml_eisaid("PNP0A08"));
> +                aml_append(pkg, aml_eisaid("PNP0A03"));
> +                aml_append(dev, aml_name_decl("_CID", pkg));
> +            } else {
> +                aml_append(dev, aml_name_decl("_HID", 
> aml_string("PNP0A08")));
> +                aml_append(dev, aml_name_decl("_CID", 
> aml_string("PNP0A03")));
> +            }
>              aml_append(dev, aml_name_decl("_BBN", aml_int(bus_num)));
>              aml_append(dev, aml_name_decl("_UID", aml_int(bus_num)));
>              aml_append(dev, aml_name_decl("_STR", aml_unicode("pxb 
> Device")));
> @@ -175,7 +187,11 @@ void acpi_dsdt_add_gpex(Aml *scope, struct GPEXConfig 
> *cfg)
>                              cfg->pio.base, 0, 0, 0);
>              aml_append(dev, aml_name_decl("_CRS", crs));
>  
> -            acpi_dsdt_add_pci_osc(dev);
> +            if (is_cxl) {
> +                build_cxl_osc_method(dev);

Either we need an #ifdef gate on CONFIG_ACPI_CXL or possibly a stub
implementation (with a g_assert_not_reached()).

> +            } else {
> +                acpi_dsdt_add_pci_osc(dev);
> +            }
>  
>              aml_append(scope, dev);
>          }


-- 
Alex Bennée