diff options
| -rw-r--r-- | hw/acpi/nvdimm.c | 56 | ||||
| -rw-r--r-- | include/hw/mem/nvdimm.h | 8 |
2 files changed, 64 insertions, 0 deletions
diff --git a/hw/acpi/nvdimm.c b/hw/acpi/nvdimm.c index 19c2642..9531340 100644 --- a/hw/acpi/nvdimm.c +++ b/hw/acpi/nvdimm.c @@ -390,15 +390,71 @@ struct NvdimmDsmOut { } QEMU_PACKED; typedef struct NvdimmDsmOut NvdimmDsmOut; +struct NvdimmDsmFunc0Out { + /* the size of buffer filled by QEMU. */ + uint32_t len; + uint32_t supported_func; +} QEMU_PACKED; +typedef struct NvdimmDsmFunc0Out NvdimmDsmFunc0Out; + +struct NvdimmDsmFuncNoPayloadOut { + /* the size of buffer filled by QEMU. */ + uint32_t len; + uint32_t func_ret_status; +} QEMU_PACKED; +typedef struct NvdimmDsmFuncNoPayloadOut NvdimmDsmFuncNoPayloadOut; + static uint64_t nvdimm_dsm_read(void *opaque, hwaddr addr, unsigned size) { + nvdimm_debug("BUG: we never read _DSM IO Port.\n"); return 0; } static void nvdimm_dsm_write(void *opaque, hwaddr addr, uint64_t val, unsigned size) { + NvdimmDsmIn *in; + hwaddr dsm_mem_addr = val; + + nvdimm_debug("dsm memory address %#" HWADDR_PRIx ".\n", dsm_mem_addr); + + /* + * The DSM memory is mapped to guest address space so an evil guest + * can change its content while we are doing DSM emulation. Avoid + * this by copying DSM memory to QEMU local memory. + */ + in = g_malloc(TARGET_PAGE_SIZE); + cpu_physical_memory_read(dsm_mem_addr, in, TARGET_PAGE_SIZE); + + le32_to_cpus(&in->revision); + le32_to_cpus(&in->function); + le32_to_cpus(&in->handle); + + nvdimm_debug("Revision %#x Handler %#x Function %#x.\n", in->revision, + in->handle, in->function); + + /* + * function 0 is called to inquire which functions are supported by + * OSPM + */ + if (in->function == 0) { + NvdimmDsmFunc0Out func0 = { + .len = cpu_to_le32(sizeof(func0)), + /* No function supported other than function 0 */ + .supported_func = cpu_to_le32(0), + }; + cpu_physical_memory_write(dsm_mem_addr, &func0, sizeof func0); + } else { + /* No function except function 0 is supported yet. */ + NvdimmDsmFuncNoPayloadOut out = { + .len = cpu_to_le32(sizeof(out)), + .func_ret_status = cpu_to_le32(1) /* Not Supported */, + }; + cpu_physical_memory_write(dsm_mem_addr, &out, sizeof(out)); + } + + g_free(in); } static const MemoryRegionOps nvdimm_dsm_ops = { diff --git a/include/hw/mem/nvdimm.h b/include/hw/mem/nvdimm.h index 26d5b78..517de9c 100644 --- a/include/hw/mem/nvdimm.h +++ b/include/hw/mem/nvdimm.h @@ -25,6 +25,14 @@ #include "hw/mem/pc-dimm.h" +#define NVDIMM_DEBUG 0 +#define nvdimm_debug(fmt, ...) \ + do { \ + if (NVDIMM_DEBUG) { \ + fprintf(stderr, "nvdimm: " fmt, ## __VA_ARGS__); \ + } \ + } while (0) + #define TYPE_NVDIMM "nvdimm" #define NVDIMM_DSM_MEM_FILE "etc/acpi/nvdimm-mem" |