On Tue, 25 Jan 2022 17:15:58 +0000
Alex Bennée <alex.ben...@linaro.org> wrote:
> Jonathan Cameron <jonathan.came...@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.came...@huawei.com>
> > Signed-off-by: Ben Widawsky <ben.widaw...@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);
> > }
>
>
