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
We reserve handle 0 for root device. In this patch, we save handle, handle,
arg1 and arg2 to dsm memory. Arg3 is conditionally saved in later patch
Signed-off-by: Xiao Guangrong <address@hidden>
---
hw/acpi/nvdimm.c | 184 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 184 insertions(+)
diff --git a/hw/acpi/nvdimm.c b/hw/acpi/nvdimm.c
index dd84e5f..53ed675 100644
--- a/hw/acpi/nvdimm.c
+++ b/hw/acpi/nvdimm.c
@@ -368,6 +368,15 @@ static void nvdimm_build_nfit(GSList *device_list, GArray
*table_offsets,
g_array_free(structures, true);
}
+struct NvdimmDsmIn {
+ uint32_t handle;
+ uint32_t revision;
+ uint32_t function;
+ /* the remaining size in the page is used by arg3. */
+ uint8_t arg3[0];
+} QEMU_PACKED;
+typedef struct NvdimmDsmIn NvdimmDsmIn;
+
static uint64_t
nvdimm_dsm_read(void *opaque, hwaddr addr, unsigned size)
{
@@ -377,6 +386,7 @@ nvdimm_dsm_read(void *opaque, hwaddr addr, unsigned size)
static void
nvdimm_dsm_write(void *opaque, hwaddr addr, uint64_t val, unsigned size)
{
+ fprintf(stderr, "BUG: we never write DSM notification IO Port.\n");
}
static const MemoryRegionOps nvdimm_dsm_ops = {
@@ -402,6 +412,179 @@ void nvdimm_init_acpi_state(MemoryRegion *memory,
MemoryRegion *io,
memory_region_add_subregion(io, NVDIMM_ACPI_IO_BASE, &state->io_mr);
}
+#define BUILD_STA_METHOD(_dev_, _method_) \
+ do { \
+ _method_ = aml_method("_STA", 0); \
+ aml_append(_method_, aml_return(aml_int(0x0f))); \
+ aml_append(_dev_, _method_); \
+ } while (0)
+
+#define BUILD_DSM_METHOD(_dev_, _method_, _handle_, _uuid_) \
+ do { \
+ Aml *ifctx, *uuid; \
+ _method_ = aml_method("_DSM", 4); \
+ /* check UUID if it is we expect, return the errorcode if not.*/ \