diff mbox series

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

Message ID 20220124171705.10432-32-Jonathan.Cameron@huawei.com (mailing list archive)
State New, archived
Headers show
Series CXl 2.0 emulation Support | expand

Commit Message

Jonathan Cameron Jan. 24, 2022, 5:16 p.m. UTC 
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.

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(-)

Comments

Alex Bennée Jan. 25, 2022, 5:15 p.m. UTC | #1 
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);
>          }
Jonathan Cameron Jan. 25, 2022, 6:13 p.m. UTC | #2 
On Tue, 25 Jan 2022 17:15:58 +0000
Alex Bennée <alex.bennee@linaro.org> wrote:

> 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

 error: attempt to use poisoned "CONFIG_ACPI_CXL"

> or possibly a stub
> implementation (with a g_assert_not_reached()).
That works.

Turns out I was too lazy thinking riscv was enough to exercise the
not CXL support case.

Lesson learned - mips64el now in my standard config :)
I'd not realized there were ACPI supporting MIPS machines...

Thanks,

Jonathan



> 
> > +            } else {
> > +                acpi_dsdt_add_pci_osc(dev);
> > +            }
> >  
> >              aml_append(scope, dev);
> >          }  
> 
>
Michael S. Tsirkin Jan. 25, 2022, 6:16 p.m. UTC | #3 
On Tue, Jan 25, 2022 at 06:13:13PM +0000, Jonathan Cameron wrote:
> On Tue, 25 Jan 2022 17:15:58 +0000
> Alex Bennée <alex.bennee@linaro.org> wrote:
> 
> > 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
> 
>  error: attempt to use poisoned "CONFIG_ACPI_CXL"
> 
> > or possibly a stub
> > implementation (with a g_assert_not_reached()).
> That works.
> 
> Turns out I was too lazy thinking riscv was enough to exercise the
> not CXL support case.
> 
> Lesson learned - mips64el now in my standard config :)
> I'd not realized there were ACPI supporting MIPS machines...
> 
> Thanks,
> 
> Jonathan

Fine for development but before you post you really should pass make
check with all machine types. Subtle interactions are not uncommon.

> 
> 
> > 
> > > +            } else {
> > > +                acpi_dsdt_add_pci_osc(dev);
> > > +            }
> > >  
> > >              aml_append(scope, dev);
> > >          }  
> > 
> >
Alex Bennée Jan. 26, 2022, 12:24 p.m. UTC | #4 
Jonathan Cameron <Jonathan.Cameron@huawei.com> writes:

> On Tue, 25 Jan 2022 17:15:58 +0000
> Alex Bennée <alex.bennee@linaro.org> wrote:
>
>> 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
<snip>
>> /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
<snip>
>> > @@ -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
>
>  error: attempt to use poisoned "CONFIG_ACPI_CXL"

Hmm I'm not sure why that happened. We generally poison symbols to stop
making configuration changes objects that are shared between binaries. I
guess softmmu_ss must be shared then. Paolo?

>
>> or possibly a stub
>> implementation (with a g_assert_not_reached()).
> That works.
>
> Turns out I was too lazy thinking riscv was enough to exercise the
> not CXL support case.
>
> Lesson learned - mips64el now in my standard config :)
> I'd not realized there were ACPI supporting MIPS machines...

It's worth making sure your gitlab account is setup to run the CI loop
because it's the first thing I do when I review a series ;-)

  https://gitlab.com/stsquad/qemu/-/pipelines/456700583
diff mbox series

Patch

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