On Fri, 20 Mar 2026 08:36:52 +0800 Xianglai Li <[email protected]> wrote:
> Add the acpi table to the loongson rtc hardware so that the virtual machine > kernel can use the loongson RTC-related drivers. > > Signed-off-by: Xianglai Li <[email protected]> Hi No data updates for tests/dta/acpi/loongarch64/virt? > --- > Cc: Song Gao <[email protected]> > Cc: Bibo Mao <[email protected]> > Cc: Jiaxun Yang <[email protected]> > Cc: Huacai Chen <[email protected]> > > hw/loongarch/virt-acpi-build.c | 25 +++++++++++++++++++++++++ > 1 file changed, 25 insertions(+) > > diff --git a/hw/loongarch/virt-acpi-build.c b/hw/loongarch/virt-acpi-build.c > index 3e34bedcd6..42820001d7 100644 > --- a/hw/loongarch/virt-acpi-build.c > +++ b/hw/loongarch/virt-acpi-build.c > @@ -460,6 +460,30 @@ static void acpi_dsdt_add_tpm(Aml *scope, > LoongArchVirtMachineState *vms) > } > #endif > > +static void acpi_dsdt_add_rtc(Aml *scope) > +{ > + Aml *dev = aml_device("RTC"); > + > + aml_append(dev, aml_name_decl("_HID", aml_string("LOON0001"))); > + aml_append(dev, aml_name_decl("_UID", aml_int(0))); > + > + Aml *crs = aml_resource_template(); > + aml_append(crs, > + aml_qword_memory(AML_POS_DECODE, AML_MIN_FIXED, AML_MAX_FIXED, > + AML_NON_CACHEABLE, AML_READ_WRITE, > + 0, VIRT_RTC_REG_BASE, > + VIRT_RTC_REG_BASE + VIRT_RTC_LEN - 1, > + 0, VIRT_RTC_LEN)); > + /* > + * The virtual machine model does not support suspend and wake-up, > + * and rtc is no longer the wake-up source. Therefore, the current > + * rtc table no longer provides the rtc alarm interrupt number to > + * avoid the software initializing alarm. > + */ > + aml_append(dev, aml_name_decl("_CRS", crs)); > + aml_append(scope, dev); > +} > + > /* build DSDT */ > static void > build_dsdt(GArray *table_data, BIOSLinker *linker, MachineState *machine) > @@ -475,6 +499,7 @@ build_dsdt(GArray *table_data, BIOSLinker *linker, > MachineState *machine) > for (i = 0; i < VIRT_UART_COUNT; i++) { > build_uart_device_aml(dsdt, i); > } > + acpi_dsdt_add_rtc(dsdt); > build_pci_device_aml(dsdt, lvms); > build_la_ged_aml(dsdt, machine); > build_flash_aml(dsdt, lvms);
