On Fri, Jul 21, 2017 at 11:32:11AM +0200, Igor Mammedov wrote:
> w2k used to boot on QEMU until we bumped revision of FADT to rev3
> (commit 77af8a2b hw/i386: Use Rev3 FADT (ACPI 2.0) instead of Rev1 to improve
> guest OS support.)
>
> Considering that w2k is ancient and long time EOLed, leave default
> rev3 but make pc-i440fx-2.9 and older machine types to force rev1
> so old setups won't break (w2k could boot).
There needs to be a machine type property added to control this
feature. When provisioning new VMs, management apps need to be
able to set the property explicitly - having them rely on picking
particular machine type name+versions is not viable, because
downstream vendors replace the machine types with their own
names + versions.
>
> Signed-off-by: Igor Mammedov <imamm...@redhat.com>
> ---
> CC: Programmingkid <programmingk...@gmail.com>
> CC: Phil Dennis-Jordan <li...@philjordan.eu>
> CC: "Michael S. Tsirkin" <m...@redhat.com>
>
> Only compile test since I don't have w2k to test with
>
> ---
> include/hw/i386/pc.h | 1 +
> hw/i386/acpi-build.c | 26 +++++++++++++++++++-------
> hw/i386/pc_piix.c | 2 ++
> 3 files changed, 22 insertions(+), 7 deletions(-)
>
> diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
> index d80859b..d6f65dd 100644
> --- a/include/hw/i386/pc.h
> +++ b/include/hw/i386/pc.h
> @@ -122,6 +122,7 @@ struct PCMachineClass {
> bool rsdp_in_ram;
> int legacy_acpi_table_size;
> unsigned acpi_data_size;
> + bool force_rev1_fadt;
>
> /* SMBIOS compat: */
> bool smbios_defaults;
> diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
> index 6b7bade..227f9ad 100644
> --- a/hw/i386/acpi-build.c
> +++ b/hw/i386/acpi-build.c
> @@ -272,7 +272,7 @@ build_facs(GArray *table_data, BIOSLinker *linker)
> }
>
> /* Load chipset information in FADT */
> -static void fadt_setup(AcpiFadtDescriptorRev3 *fadt, AcpiPmInfo *pm)
> +static void fadt_setup(AcpiFadtDescriptorRev3 *fadt, AcpiPmInfo *pm, bool
> rev1)
> {
> fadt->model = 1;
> fadt->reserved1 = 0;
> @@ -304,6 +304,9 @@ static void fadt_setup(AcpiFadtDescriptorRev3 *fadt,
> AcpiPmInfo *pm)
> fadt->flags |= cpu_to_le32(1 <<
> ACPI_FADT_F_FORCE_APIC_CLUSTER_MODEL);
> }
> fadt->century = RTC_CENTURY;
> + if (rev1) {
> + return;
> + }
>
> fadt->flags |= cpu_to_le32(1 << ACPI_FADT_F_RESET_REG_SUP);
> fadt->reset_value = 0xf;
> @@ -335,6 +338,7 @@ static void fadt_setup(AcpiFadtDescriptorRev3 *fadt,
> AcpiPmInfo *pm)
> /* FADT */
> static void
> build_fadt(GArray *table_data, BIOSLinker *linker, AcpiPmInfo *pm,
> + MachineState *machine,
> unsigned facs_tbl_offset, unsigned dsdt_tbl_offset,
> const char *oem_id, const char *oem_table_id)
> {
> @@ -342,6 +346,9 @@ build_fadt(GArray *table_data, BIOSLinker *linker,
> AcpiPmInfo *pm,
> unsigned fw_ctrl_offset = (char *)&fadt->firmware_ctrl -
> table_data->data;
> unsigned dsdt_entry_offset = (char *)&fadt->dsdt - table_data->data;
> unsigned xdsdt_entry_offset = (char *)&fadt->x_dsdt - table_data->data;
> + PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(machine);
> + int fadt_size = sizeof(*fadt);
> + int rev = 3;
>
> /* FACS address to be filled by Guest linker */
> bios_linker_loader_add_pointer(linker,
> @@ -349,16 +356,21 @@ build_fadt(GArray *table_data, BIOSLinker *linker,
> AcpiPmInfo *pm,
> ACPI_BUILD_TABLE_FILE, facs_tbl_offset);
>
> /* DSDT address to be filled by Guest linker */
> - fadt_setup(fadt, pm);
> + fadt_setup(fadt, pm, pcmc->force_rev1_fadt);
> bios_linker_loader_add_pointer(linker,
> ACPI_BUILD_TABLE_FILE, dsdt_entry_offset, sizeof(fadt->dsdt),
> ACPI_BUILD_TABLE_FILE, dsdt_tbl_offset);
> - bios_linker_loader_add_pointer(linker,
> - ACPI_BUILD_TABLE_FILE, xdsdt_entry_offset, sizeof(fadt->x_dsdt),
> - ACPI_BUILD_TABLE_FILE, dsdt_tbl_offset);
> + if (pcmc->force_rev1_fadt) {
> + rev = 1;
> + fadt_size = offsetof(typeof(*fadt), reset_register);
> + } else {
> + bios_linker_loader_add_pointer(linker,
> + ACPI_BUILD_TABLE_FILE, xdsdt_entry_offset, sizeof(fadt->x_dsdt),
> + ACPI_BUILD_TABLE_FILE, dsdt_tbl_offset);
> + }
>
> build_header(linker, table_data,
> - (void *)fadt, "FACP", sizeof(*fadt), 3, oem_id,
> oem_table_id);
> + (void *)fadt, "FACP", fadt_size, rev, oem_id, oem_table_id);
> }
>
> void pc_madt_cpu_entry(AcpiDeviceIf *adev, int uid,
> @@ -2667,7 +2679,7 @@ void acpi_build(AcpiBuildTables *tables, MachineState
> *machine)
> /* ACPI tables pointed to by RSDT */
> fadt = tables_blob->len;
> acpi_add_table(table_offsets, tables_blob);
> - build_fadt(tables_blob, tables->linker, &pm, facs, dsdt,
> + build_fadt(tables_blob, tables->linker, &pm, machine, facs, dsdt,
> slic_oem.id, slic_oem.table_id);
> aml_len += tables_blob->len - fadt;
>
> diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
> index 11b4336..bc61332 100644
> --- a/hw/i386/pc_piix.c
> +++ b/hw/i386/pc_piix.c
> @@ -449,9 +449,11 @@ DEFINE_I440FX_MACHINE(v2_10, "pc-i440fx-2.10", NULL,
>
> static void pc_i440fx_2_9_machine_options(MachineClass *m)
> {
> + PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
> pc_i440fx_2_10_machine_options(m);
> m->is_default = 0;
> m->alias = NULL;
> + pcmc->force_rev1_fadt = true;
> SET_MACHINE_COMPAT(m, PC_COMPAT_2_9);
> }
>
> --
> 2.7.4
>
>
Regards,
Daniel
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