Re: [Qemu-arm] [PATCH-for-4.2 v9 01/12] hw/acpi: Make ACPI IO address space configurable

[Igor Mammedov <imammedo@redhat.com>]

On Thu, 29 Aug 2019 11:04:27 +0000
Shameerali Kolothum Thodi <shameerali.kolothum.thodi@huawei.com> wrote:

> Hi Igor,
> 
> > -----Original Message-----
> > From: Igor Mammedov [mailto:imammedo@redhat.com]
> > Sent: 29 August 2019 09:45
> > To: Shameerali Kolothum Thodi <shameerali.kolothum.thodi@huawei.com>
> > Cc: qemu-devel@nongnu.org; qemu-arm@nongnu.org;
> > eric.auger@redhat.com; peter.maydell@linaro.org; sameo@linux.intel.com;
> > ard.biesheuvel@linaro.org; Linuxarm <linuxarm@huawei.com>;
> > shannon.zhaosl@gmail.com; sebastien.boeuf@intel.com; lersek@redhat.com
> > Subject: Re: [PATCH-for-4.2 v9 01/12] hw/acpi: Make ACPI IO address space
> > configurable
> > 
> > On Thu, 15 Aug 2019 08:42:48 +0000
> > Shameerali Kolothum Thodi <shameerali.kolothum.thodi@huawei.com> wrote:
> >   
> > > > -----Original Message-----
> > > > From: Linuxarm [mailto:linuxarm-bounces@huawei.com] On Behalf Of  
> > Shameer  
> > > > Kolothum
> > > > Sent: 13 August 2019 22:05
> > > > To: qemu-devel@nongnu.org; qemu-arm@nongnu.org;
> > > > eric.auger@redhat.com; imammedo@redhat.com
> > > > Cc: peter.maydell@linaro.org; sameo@linux.intel.com;
> > > > ard.biesheuvel@linaro.org; Linuxarm <linuxarm@huawei.com>;
> > > > shannon.zhaosl@gmail.com; sebastien.boeuf@intel.com;  
> > lersek@redhat.com  
> > > > Subject: [PATCH-for-4.2 v9 01/12] hw/acpi: Make ACPI IO address space
> > > > configurable
> > > >
> > > > This is in preparation for adding support for ARM64 platforms
> > > > where it doesn't use port mapped IO for ACPI IO space. We are
> > > > making changes so that MMIO region can be accommodated
> > > > and board can pass the base address into the aml build function.  
> > >
> > > Looks like, this now breaks the "make check" on x86_64 and needs
> > > updating bios-tables-test-allowed-diff.h with DSDT entries. But I am
> > > not sure what changed now compared to v8(and older ones) that makes
> > > it to complain now!.  
> > 
> > you could see diff of what's changed but running test manually with
> > V=1 env var if you have 'iasl' installed
> > 
> > V=1 QTEST_QEMU_BINARY=x86_64-softmmu/qemu-system-x86_64
> > tests/bios-tables-test  
> 
> Thanks for that tip and please find below output.
> 
> /x86_64/acpi/piix4: Could not access KVM kernel module: No such file or directory
> qemu-system-x86_64: failed to initialize KVM: No such file or directory
> qemu-system-x86_64: Back to tcg accelerator
> acpi-test: Warning! DSDT binary file mismatch. Actual [aml:/tmp/aml-RGE76Z], Expected [aml:tests/data/acpi/pc/DSDT].
> acpi-test: Warning! DSDT mismatch. Actual [asl:/tmp/asl-TAE76Z.dsl, aml:/tmp/aml-RGE76Z], Expected [asl:/tmp/asl-O6B76Z.dsl, aml:tests/data/acpi/pc/DSDT].
> 
> diff --git a/tmp/asl-O6B76Z.dsl b/tmp/asl-TAE76Z.dsl
> index 823ff002ec..4de5bd3221 100644
> --- a/tmp/asl-O6B76Z.dsl
> +++ b/tmp/asl-TAE76Z.dsl
> @@ -5,13 +5,13 @@
>   *
>   * Disassembling to symbolic ASL+ operators
>   *
> - * Disassembly of tests/data/acpi/pc/DSDT, Thu Aug 29 10:40:40 2019
> + * Disassembly of /tmp/aml-RGE76Z, Thu Aug 29 10:40:40 2019
>   *
>   * Original Table Header:
>   *     Signature        "DSDT"
> - *     Length           0x0000140B (5131)
> + *     Length           0x000017E4 (6116)
>   *     Revision         0x01 **** 32-bit table (V1), no 64-bit math support
> - *     Checksum         0xB1
> + *     Checksum         0x8B
>   *     OEM ID           "BOCHS "
>   *     OEM Table ID     "BXPCDSDT"
>   *     OEM Revision     0x00000001 (1)
> @@ -787,6 +787,206 @@ DefinitionBlock ("", "DSDT", 1, "BOCHS ", "BXPCDSDT", 0x00000001)
>          \_SB.CPUS.CSCN ()
>      }
> 
> +    Device (\_SB.PCI0.MHPD)
> +    {
> +        Name (_HID, "PNP0A06" /* Generic Container Device */)  // _HID: Hardware ID
> +        Name (_UID, "Memory hotplug resources")  // _UID: Unique ID
> +        Name (_CRS, Reso 
> 
> I think what happens is since we are now passing the memhp_io_base directly into the 
> build_memory_hotplug_aml() and removed the "static uint16_t memhp_io_base", on 
> x86, memory hotplug aml code is always built by default irrespective of whether
> acpi_memory_hotplug_init() is invoked or not. 
> 
> I could either reintroduce a check in build_memory_hotplug_aml() to make sure
> acpi_memory_hotplug_init() is called, or could do something like below, 
fix looks fine to me, see minor comment below
 
> diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
> index 3995f9a40f..17756c2191 100644
> --- a/hw/i386/acpi-build.c
> +++ b/hw/i386/acpi-build.c
> @@ -1873,9 +1873,12 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
>          build_cpus_aml(dsdt, machine, opts, pm->cpu_hp_io_base,
>                         "\\_SB.PCI0", "\\_GPE._E02");
>      }
> -    build_memory_hotplug_aml(dsdt, nr_mem, "\\_SB.PCI0",
> -                             "\\_GPE._E03", AML_SYSTEM_IO,
> -                             pcms->memhp_io_base);
> +
> +    if (acpi_enabled && pcms->acpi_dev && nr_mem) {
double-check call path and see if
  acpi_enabled && pcms->acpi_dev
is really necessary


> +        build_memory_hotplug_aml(dsdt, nr_mem, "\\_SB.PCI0",
> +                                 "\\_GPE._E03", AML_SYSTEM_IO,
> +                                 pcms->memhp_io_base);
> +    }
> 
> 
> I prefer the latter if there are no other issues with that. Please let me know.
> 
> Thanks,
> Shameer
> 
> >   
> > > Patchew URL:  
> > https://patchew.org/QEMU/20190813210539.31164-1-shameerali.kolothum.t
> > hodi@huawei.com/  
> > >
> > > ERROR:/tmp/qemu-test/src/tests/bios-tables-test.c:447:test_acpi_asl:  
> > assertion failed: (all_tables_match)  
> > >
> > > Thanks,
> > > Shameer
> > >  
> > > > Also move few MEMORY_* definitions to header so that other memory
> > > > hotplug event signalling mechanisms (eg. Generic Event Device on
> > > > HW-reduced acpi platforms) can use the same from their respective
> > > > event handler code.
> > > >
> > > > Signed-off-by: Shameer Kolothum  
> > <shameerali.kolothum.thodi@huawei.com>  
> > > > ---
> > > > v8 --> v9
> > > >   -base address is an input into build_memory_hotplug_aml()
> > > >   -Removed R-by tags from Igor and Eric for now.
> > > > ---
> > > >  hw/acpi/memory_hotplug.c         | 29 ++++++++++++++---------------
> > > >  hw/i386/acpi-build.c             |  4 +++-
> > > >  hw/i386/pc.c                     |  3 +++
> > > >  include/hw/acpi/memory_hotplug.h |  9 +++++++--
> > > >  include/hw/i386/pc.h             |  3 +++
> > > >  5 files changed, 30 insertions(+), 18 deletions(-)
> > > >
> > > > diff --git a/hw/acpi/memory_hotplug.c b/hw/acpi/memory_hotplug.c
> > > > index 297812d5f7..1734d4b44f 100644
> > > > --- a/hw/acpi/memory_hotplug.c
> > > > +++ b/hw/acpi/memory_hotplug.c
> > > > @@ -29,12 +29,7 @@
> > > >  #define MEMORY_SLOT_PROXIMITY_METHOD "MPXM"
> > > >  #define MEMORY_SLOT_EJECT_METHOD     "MEJ0"
> > > >  #define MEMORY_SLOT_NOTIFY_METHOD    "MTFY"
> > > > -#define MEMORY_SLOT_SCAN_METHOD      "MSCN"
> > > >  #define MEMORY_HOTPLUG_DEVICE        "MHPD"
> > > > -#define MEMORY_HOTPLUG_IO_LEN         24
> > > > -#define MEMORY_DEVICES_CONTAINER     "\\_SB.MHPC"
> > > > -
> > > > -static uint16_t memhp_io_base;
> > > >
> > > >  static ACPIOSTInfo *acpi_memory_device_status(int slot, MemStatus  
> > *mdev)  
> > > >  {
> > > > @@ -209,7 +204,7 @@ static const MemoryRegionOps
> > > > acpi_memory_hotplug_ops = {
> > > >  };
> > > >
> > > >  void acpi_memory_hotplug_init(MemoryRegion *as, Object *owner,
> > > > -                              MemHotplugState *state, uint16_t
> > > > io_base)
> > > > +                              MemHotplugState *state, hwaddr
> > > > io_base)
> > > >  {
> > > >      MachineState *machine = MACHINE(qdev_get_machine());
> > > >
> > > > @@ -218,12 +213,10 @@ void acpi_memory_hotplug_init(MemoryRegion  
> > *as,  
> > > > Object *owner,
> > > >          return;
> > > >      }
> > > >
> > > > -    assert(!memhp_io_base);
> > > > -    memhp_io_base = io_base;
> > > >      state->devs = g_malloc0(sizeof(*state->devs) * state->dev_count);
> > > >      memory_region_init_io(&state->io, owner,  
> > &acpi_memory_hotplug_ops,  
> > > > state,
> > > >                            "acpi-mem-hotplug",
> > > > MEMORY_HOTPLUG_IO_LEN);
> > > > -    memory_region_add_subregion(as, memhp_io_base, &state->io);
> > > > +    memory_region_add_subregion(as, io_base, &state->io);
> > > >  }
> > > >
> > > >  /**
> > > > @@ -342,7 +335,8 @@ const VMStateDescription  
> > vmstate_memory_hotplug  
> > > > = {
> > > >
> > > >  void build_memory_hotplug_aml(Aml *table, uint32_t nr_mem,
> > > >                                const char *res_root,
> > > > -                              const char *event_handler_method)
> > > > +                              const char *event_handler_method,
> > > > +                              AmlRegionSpace rs, hwaddr
> > > > memhp_io_base)
> > > >  {
> > > >      int i;
> > > >      Aml *ifctx;
> > > > @@ -365,14 +359,19 @@ void build_memory_hotplug_aml(Aml *table,
> > > > uint32_t nr_mem,
> > > >              aml_name_decl("_UID", aml_string("Memory hotplug
> > > > resources")));
> > > >
> > > >          crs = aml_resource_template();
> > > > -        aml_append(crs,
> > > > -            aml_io(AML_DECODE16, memhp_io_base, memhp_io_base,  
> > 0,  
> > > > -                   MEMORY_HOTPLUG_IO_LEN)
> > > > -        );
> > > > +        if (rs == AML_SYSTEM_IO) {
> > > > +            aml_append(crs,
> > > > +                aml_io(AML_DECODE16, memhp_io_base,
> > > > memhp_io_base, 0,
> > > > +                       MEMORY_HOTPLUG_IO_LEN)
> > > > +            );
> > > > +        } else {
> > > > +            aml_append(crs, aml_memory32_fixed(memhp_io_base,
> > > > +                            MEMORY_HOTPLUG_IO_LEN,
> > > > AML_READ_WRITE));
> > > > +        }
> > > >          aml_append(mem_ctrl_dev, aml_name_decl("_CRS", crs));
> > > >
> > > >          aml_append(mem_ctrl_dev, aml_operation_region(
> > > > -            MEMORY_HOTPLUG_IO_REGION, AML_SYSTEM_IO,
> > > > +            MEMORY_HOTPLUG_IO_REGION, rs,
> > > >              aml_int(memhp_io_base), MEMORY_HOTPLUG_IO_LEN)
> > > >          );
> > > >
> > > > diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
> > > > index f3fdfefcd5..e76d6631ea 100644
> > > > --- a/hw/i386/acpi-build.c
> > > > +++ b/hw/i386/acpi-build.c
> > > > @@ -1871,7 +1871,9 @@ build_dsdt(GArray *table_data, BIOSLinker  
> > *linker,  
> > > >          build_cpus_aml(dsdt, machine, opts, pm->cpu_hp_io_base,
> > > >                         "\\_SB.PCI0", "\\_GPE._E02");
> > > >      }
> > > > -    build_memory_hotplug_aml(dsdt, nr_mem, "\\_SB.PCI0",
> > > > "\\_GPE._E03");
> > > > +    build_memory_hotplug_aml(dsdt, nr_mem, "\\_SB.PCI0",
> > > > +                             "\\_GPE._E03", AML_SYSTEM_IO,
> > > > +                             pcms->memhp_io_base);
> > > >
> > > >      scope =  aml_scope("_GPE");
> > > >      {
> > > > diff --git a/hw/i386/pc.c b/hw/i386/pc.c
> > > > index 549c437050..be973cea99 100644
> > > > --- a/hw/i386/pc.c
> > > > +++ b/hw/i386/pc.c
> > > > @@ -1936,6 +1936,9 @@ void pc_memory_init(PCMachineState *pcms,
> > > >
> > > >      /* Init default IOAPIC address space */
> > > >      pcms->ioapic_as = &address_space_memory;
> > > > +
> > > > +    /* Init ACPI memory hotplug IO base address */
> > > > +    pcms->memhp_io_base = ACPI_MEMORY_HOTPLUG_BASE;
> > > >  }
> > > >
> > > >  /*
> > > > diff --git a/include/hw/acpi/memory_hotplug.h
> > > > b/include/hw/acpi/memory_hotplug.h
> > > > index 77c65765d6..dfe9cf3fde 100644
> > > > --- a/include/hw/acpi/memory_hotplug.h
> > > > +++ b/include/hw/acpi/memory_hotplug.h
> > > > @@ -5,6 +5,10 @@
> > > >  #include "hw/acpi/acpi.h"
> > > >  #include "hw/acpi/aml-build.h"
> > > >
> > > > +#define MEMORY_SLOT_SCAN_METHOD      "MSCN"
> > > > +#define MEMORY_DEVICES_CONTAINER     "\\_SB.MHPC"
> > > > +#define MEMORY_HOTPLUG_IO_LEN         24
> > > > +
> > > >  /**
> > > >   * MemStatus:
> > > >   * @is_removing: the memory device in slot has been requested to be
> > > > ejected.
> > > > @@ -29,7 +33,7 @@ typedef struct MemHotplugState {
> > > >  } MemHotplugState;
> > > >
> > > >  void acpi_memory_hotplug_init(MemoryRegion *as, Object *owner,
> > > > -                              MemHotplugState *state, uint16_t
> > > > io_base);
> > > > +                              MemHotplugState *state, hwaddr
> > > > io_base);
> > > >
> > > >  void acpi_memory_plug_cb(HotplugHandler *hotplug_dev,  
> > MemHotplugState  
> > > > *mem_st,
> > > >                           DeviceState *dev, Error **errp);
> > > > @@ -48,5 +52,6 @@ void acpi_memory_ospm_status(MemHotplugState
> > > > *mem_st, ACPIOSTInfoList ***list);
> > > >
> > > >  void build_memory_hotplug_aml(Aml *table, uint32_t nr_mem,
> > > >                                const char *res_root,
> > > > -                              const char *event_handler_method);
> > > > +                              const char *event_handler_method,
> > > > +                              AmlRegionSpace rs, hwaddr
> > > > memhp_io_base);
> > > >  #endif
> > > > diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
> > > > index 859b64c51d..49b47535cf 100644
> > > > --- a/include/hw/i386/pc.h
> > > > +++ b/include/hw/i386/pc.h
> > > > @@ -69,6 +69,9 @@ struct PCMachineState {
> > > >      /* Address space used by IOAPIC device. All IOAPIC interrupts
> > > >       * will be translated to MSI messages in the address space. */
> > > >      AddressSpace *ioapic_as;
> > > > +
> > > > +    /* ACPI Memory hotplug IO base address */
> > > > +    hwaddr memhp_io_base;
> > > >  };
> > > >
> > > >  #define PC_MACHINE_ACPI_DEVICE_PROP "acpi-device"
> > > > --
> > > > 2.17.1
> > > >
> > > >
> > > > _______________________________________________
> > > > Linuxarm mailing list
> > > > Linuxarm@huawei.com
> > > > http://hulk.huawei.com/mailman/listinfo/linuxarm  
>