Re: [PATCH v2 03/13] acpi: madt: skip pci override on pci-less systems (microvm)

[Igor Mammedov <imammedo@redhat.com>]

On Tue,  5 May 2020 15:42:55 +0200
Gerd Hoffmann <kraxel@redhat.com> wrote:

> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

Reviewed-by: Igor Mammedov <imammedo@redhat.com>

> ---
>  hw/i386/acpi-common.h |  3 ++-
>  hw/i386/acpi-build.c  |  2 +-
>  hw/i386/acpi-common.c | 26 +++++++++++++++-----------
>  3 files changed, 18 insertions(+), 13 deletions(-)
> 
> diff --git a/hw/i386/acpi-common.h b/hw/i386/acpi-common.h
> index c30e461f1854..9cac18dddf5b 100644
> --- a/hw/i386/acpi-common.h
> +++ b/hw/i386/acpi-common.h
> @@ -9,6 +9,7 @@
>  #define ACPI_BUILD_IOAPIC_ID 0x0
>  
>  void acpi_build_madt(GArray *table_data, BIOSLinker *linker,
> -                     X86MachineState *x86ms, AcpiDeviceIf *adev);
> +                     X86MachineState *x86ms, AcpiDeviceIf *adev,
> +                     bool has_pci);
>  
>  #endif
> diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
> index eb530e5cd56d..4cce2192eeb0 100644
> --- a/hw/i386/acpi-build.c
> +++ b/hw/i386/acpi-build.c
> @@ -2441,7 +2441,7 @@ void acpi_build(AcpiBuildTables *tables, MachineState *machine)
>  
>      acpi_add_table(table_offsets, tables_blob);
>      acpi_build_madt(tables_blob, tables->linker, x86ms,
> -                    ACPI_DEVICE_IF(pcms->acpi_dev));
> +                    ACPI_DEVICE_IF(pcms->acpi_dev), true);
>  
>      vmgenid_dev = find_vmgenid_dev();
>      if (vmgenid_dev) {
> diff --git a/hw/i386/acpi-common.c b/hw/i386/acpi-common.c
> index 5caca16a0b59..ab9b00581a15 100644
> --- a/hw/i386/acpi-common.c
> +++ b/hw/i386/acpi-common.c
> @@ -72,7 +72,8 @@ void pc_madt_cpu_entry(AcpiDeviceIf *adev, int uid,
>  }
>  
>  void acpi_build_madt(GArray *table_data, BIOSLinker *linker,
> -                     X86MachineState *x86ms, AcpiDeviceIf *adev)
> +                     X86MachineState *x86ms, AcpiDeviceIf *adev,
> +                     bool has_pci)
>  {
>      MachineClass *mc = MACHINE_GET_CLASS(x86ms);
>      const CPUArchIdList *apic_ids = mc->possible_cpu_arch_ids(MACHINE(x86ms));
> @@ -111,18 +112,21 @@ void acpi_build_madt(GArray *table_data, BIOSLinker *linker,
>          intsrcovr->gsi    = cpu_to_le32(2);
>          intsrcovr->flags  = cpu_to_le16(0); /* conforms to bus specifications */
>      }
> -    for (i = 1; i < 16; i++) {
> +
> +    if (has_pci) {
> +        for (i = 1; i < 16; i++) {
>  #define ACPI_BUILD_PCI_IRQS ((1<<5) | (1<<9) | (1<<10) | (1<<11))
> -        if (!(ACPI_BUILD_PCI_IRQS & (1 << i))) {
> -            /* No need for a INT source override structure. */
> -            continue;
> +            if (!(ACPI_BUILD_PCI_IRQS & (1 << i))) {
> +                /* No need for a INT source override structure. */
> +                continue;
> +            }
> +            intsrcovr = acpi_data_push(table_data, sizeof *intsrcovr);
> +            intsrcovr->type   = ACPI_APIC_XRUPT_OVERRIDE;
> +            intsrcovr->length = sizeof(*intsrcovr);
> +            intsrcovr->source = i;
> +            intsrcovr->gsi    = cpu_to_le32(i);
> +            intsrcovr->flags  = cpu_to_le16(0xd); /* active high, level triggered */
>          }
> -        intsrcovr = acpi_data_push(table_data, sizeof *intsrcovr);
> -        intsrcovr->type   = ACPI_APIC_XRUPT_OVERRIDE;
> -        intsrcovr->length = sizeof(*intsrcovr);
> -        intsrcovr->source = i;
> -        intsrcovr->gsi    = cpu_to_le32(i);
> -        intsrcovr->flags  = cpu_to_le16(0xd); /* active high, level triggered */
>      }
>  
>      if (x2apic_mode) {