From 772863954ca360cc67654ab781f20784bc299b95 Mon Sep 17 00:00:00 2001 From: Xiao Guangrong Date: Wed, 2 Dec 2015 15:20:59 +0800 Subject: [PATCH] nvdimm acpi: build ACPI nvdimm devices NVDIMM devices is defined in ACPI 6.0 9.20 NVDIMM Devices There is a root device under \_SB and specified NVDIMM devices are under the root device. Each NVDIMM device has _ADR which returns its handle used to associate MEMDEV structure in NFIT Currently, we do not support any function on _DSM, that means, NVDIMM label data has not been supported yet Reviewed-by: Stefan Hajnoczi Signed-off-by: Xiao Guangrong Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/acpi/nvdimm.c | 106 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 106 insertions(+) diff --git a/hw/acpi/nvdimm.c b/hw/acpi/nvdimm.c index 98c004d1a5..9534418824 100644 --- a/hw/acpi/nvdimm.c +++ b/hw/acpi/nvdimm.c @@ -367,6 +367,111 @@ static void nvdimm_build_nfit(GSList *device_list, GArray *table_offsets, g_array_free(structures, true); } +#define NVDIMM_COMMON_DSM "NCAL" + +static void nvdimm_build_common_dsm(Aml *dev) +{ + Aml *method, *ifctx, *function; + uint8_t byte_list[1]; + + method = aml_method(NVDIMM_COMMON_DSM, 4, AML_NOTSERIALIZED); + function = aml_arg(2); + + /* + * function 0 is called to inquire what functions are supported by + * OSPM + */ + ifctx = aml_if(aml_equal(function, aml_int(0))); + byte_list[0] = 0 /* No function Supported */; + aml_append(ifctx, aml_return(aml_buffer(1, byte_list))); + aml_append(method, ifctx); + + /* No function is supported yet. */ + byte_list[0] = 1 /* Not Supported */; + aml_append(method, aml_return(aml_buffer(1, byte_list))); + + aml_append(dev, method); +} + +static void nvdimm_build_device_dsm(Aml *dev) +{ + Aml *method; + + method = aml_method("_DSM", 4, AML_NOTSERIALIZED); + aml_append(method, aml_return(aml_call4(NVDIMM_COMMON_DSM, aml_arg(0), + aml_arg(1), aml_arg(2), aml_arg(3)))); + aml_append(dev, method); +} + +static void nvdimm_build_nvdimm_devices(GSList *device_list, Aml *root_dev) +{ + for (; device_list; device_list = device_list->next) { + DeviceState *dev = device_list->data; + int slot = object_property_get_int(OBJECT(dev), PC_DIMM_SLOT_PROP, + NULL); + uint32_t handle = nvdimm_slot_to_handle(slot); + Aml *nvdimm_dev; + + nvdimm_dev = aml_device("NV%02X", slot); + + /* + * ACPI 6.0: 9.20 NVDIMM Devices: + * + * _ADR object that is used to supply OSPM with unique address + * of the NVDIMM device. This is done by returning the NFIT Device + * handle that is used to identify the associated entries in ACPI + * table NFIT or _FIT. + */ + aml_append(nvdimm_dev, aml_name_decl("_ADR", aml_int(handle))); + + nvdimm_build_device_dsm(nvdimm_dev); + aml_append(root_dev, nvdimm_dev); + } +} + +static void nvdimm_build_ssdt(GSList *device_list, GArray *table_offsets, + GArray *table_data, GArray *linker) +{ + Aml *ssdt, *sb_scope, *dev; + + acpi_add_table(table_offsets, table_data); + + ssdt = init_aml_allocator(); + acpi_data_push(ssdt->buf, sizeof(AcpiTableHeader)); + + sb_scope = aml_scope("\\_SB"); + + dev = aml_device("NVDR"); + + /* + * ACPI 6.0: 9.20 NVDIMM Devices: + * + * The ACPI Name Space device uses _HID of ACPI0012 to identify the root + * NVDIMM interface device. Platform firmware is required to contain one + * such device in _SB scope if NVDIMMs support is exposed by platform to + * OSPM. + * For each NVDIMM present or intended to be supported by platform, + * platform firmware also exposes an ACPI Namespace Device under the + * root device. + */ + aml_append(dev, aml_name_decl("_HID", aml_string("ACPI0012"))); + + nvdimm_build_common_dsm(dev); + nvdimm_build_device_dsm(dev); + + nvdimm_build_nvdimm_devices(device_list, dev); + + aml_append(sb_scope, dev); + + aml_append(ssdt, sb_scope); + /* copy AML table into ACPI tables blob and patch header there */ + g_array_append_vals(table_data, ssdt->buf->data, ssdt->buf->len); + build_header(linker, table_data, + (void *)(table_data->data + table_data->len - ssdt->buf->len), + "SSDT", ssdt->buf->len, 1, "NVDIMM"); + free_aml_allocator(); +} + void nvdimm_build_acpi(GArray *table_offsets, GArray *table_data, GArray *linker) { @@ -378,5 +483,6 @@ void nvdimm_build_acpi(GArray *table_offsets, GArray *table_data, return; } nvdimm_build_nfit(device_list, table_offsets, table_data, linker); + nvdimm_build_ssdt(device_list, table_offsets, table_data, linker); g_slist_free(device_list); } -- 2.11.4.GIT