__DSM is defined in ACPI 6.0: 9.14.1 _DSM (Device Specific Method)
Function 0 is a query function. We do not support any function on root
device and only 3 functions are support for NVDIMM device,
NFIT_CMD_GET_CONFIG_SIZE, NFIT_CMD_GET_CONFIG_DATA and
NFIT_CMD_SET_CONFIG_DATA, that means we currently only allow to access
device's Label Namespace
Signed-off-by: Xiao Guangrong <guangrong.xiao@xxxxxxxxxxxxxxx>
---
hw/mem/pc-nvdimm.c | 126 +++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 126 insertions(+)
diff --git a/hw/mem/pc-nvdimm.c b/hw/mem/pc-nvdimm.c
index c0965ae..b586bf7 100644
--- a/hw/mem/pc-nvdimm.c
+++ b/hw/mem/pc-nvdimm.c
@@ -29,6 +29,15 @@
#include "exec/address-spaces.h"
#include "hw/acpi/aml-build.h"
#include "hw/mem/pc-nvdimm.h"
+#include "sysemu/sysemu.h"
+
+//#define NVDIMM_DEBUG
+
+#ifdef NVDIMM_DEBUG
+#define nvdebug(fmt, ...) fprintf(stderr, "nvdimm: " fmt, ## __VA_ARGS__)
+#else
+#define nvdebug(...)
+#endif
#define PAGE_SIZE (1UL << 12)
@@ -135,6 +144,22 @@ static void nfit_spa_uuid_pm(void *uuid)
memcpy(uuid, &uuid_pm, sizeof(uuid_pm));
}
+static bool dsm_is_root_uuid(uint8_t *uuid)
+{
+ uuid_le uuid_root = UUID_LE(0x2f10e7a4, 0x9e91, 0x11e4, 0x89,
+ 0xd3, 0x12, 0x3b, 0x93, 0xf7, 0x5c, 0xba);
+
+ return !memcmp(uuid, &uuid_root, sizeof(uuid_root));
+}
+
+static bool dsm_is_dimm_uuid(uint8_t *uuid)
+{
+ uuid_le uuid_dimm = UUID_LE(0x4309ac30, 0x0d11, 0x11e4, 0x91,
+ 0x91, 0x08, 0x00, 0x20, 0x0c, 0x9a, 0x66);
+
+ return !memcmp(uuid, &uuid_dimm, sizeof(uuid_dimm));
+}
+
enum {
NFIT_TABLE_SPA = 0,
NFIT_TABLE_MEM = 1,
@@ -349,6 +374,23 @@ enum {
NFIT_CMD_VENDOR = 9,
};
+enum {
+ NFIT_STATUS_SUCCESS = 0,
+ NFIT_STATUS_NOT_SUPPORTED = 1,
+ NFIT_STATUS_NON_EXISTING_MEM_DEV = 2,
+ NFIT_STATUS_INVALID_PARAS = 3,
+ NFIT_STATUS_VENDOR_SPECIFIC_ERROR = 4,
+};
+
+#define DSM_REVISION (1)
+
+/* do not support any command except NFIT_CMD_ARS_CAP on root. */
+#define ROOT_SUPPORT_CMD (1 << NFIT_CMD_ARS_CAP)
+#define DIMM_SUPPORT_CMD ((1 << NFIT_CMD_IMPLEMENTED) \
+ | (1 << NFIT_CMD_GET_CONFIG_SIZE) \
+ | (1 << NFIT_CMD_GET_CONFIG_DATA) \
+ | (1 << NFIT_CMD_SET_CONFIG_DATA))
+
struct dsm_buffer {
/* RAM page. */
uint32_t handle;
@@ -366,6 +408,18 @@ struct dsm_buffer {
};
};
+struct cmd_out_implemented {
+ uint64_t cmd_list;
+};
+
+struct dsm_out {
+ union {
+ uint32_t status;
+ struct cmd_out_implemented cmd_implemented;
+ uint8_t data[PAGE_SIZE];
+ };
+};
+
static uint64_t dsm_read(void *opaque, hwaddr addr,
unsigned size)
{
@@ -374,10 +428,82 @@ static uint64_t dsm_read(void *opaque, hwaddr addr,
return 0;
}
+static void dsm_write_root(struct dsm_buffer *in, struct dsm_out *out)
+{
+ uint32_t function = in->arg2;
+
+ if (function == NFIT_CMD_IMPLEMENTED) {
+ out->cmd_implemented.cmd_list = ROOT_SUPPORT_CMD;
+ return;
+ }
+
+ out->status = NFIT_STATUS_NOT_SUPPORTED;
+ nvdebug("Return status %#x.\n", out->status);
+}
+
+static void dsm_write_nvdimm(struct dsm_buffer *in, struct dsm_out *out)
+{
+ uint32_t function = in->arg2;
+ uint32_t status;
+
+ switch (function) {
+ case NFIT_CMD_IMPLEMENTED:
+ out->cmd_implemented.cmd_list = DIMM_SUPPORT_CMD;
+ return;
+ default:
+ status = NFIT_STATUS_NOT_SUPPORTED;
+ };
+
+ nvdebug("Return status %#x.\n", status);
+ out->status = status;
+}
+
static void dsm_write(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
+ struct MemoryRegion *dsm_ram_mr = opaque;
+ struct dsm_buffer *dsm;
+ struct dsm_out *out;
+ void *buf;
+
assert(val == NOTIFY_VALUE);
+
+ buf = memory_region_get_ram_ptr(dsm_ram_mr);
+ dsm = buf;
+ out = buf;
+
+ nvdebug("Arg0 " UUID_FMT ".\n", dsm->arg0[0], dsm->arg0[1], dsm->arg0[2],
+ dsm->arg0[3], dsm->arg0[4], dsm->arg0[5], dsm->arg0[6],
+ dsm->arg0[7], dsm->arg0[8], dsm->arg0[9], dsm->arg0[10],
+ dsm->arg0[11], dsm->arg0[12], dsm->arg0[13], dsm->arg0[14],
+ dsm->arg0[15]);
+ nvdebug("Handler %#x, Arg1 %#x, Arg2 %#x.\n", dsm->handle, dsm->arg1,
+ dsm->arg2);
+
+ if (dsm->arg1 != DSM_REVISION) {
+ nvdebug("Revision %#x is not supported, expect %#x.\n",
+ dsm->arg1, DSM_REVISION);
+ goto exit;
+ }
+
+ if (!dsm->handle) {
+ if (!dsm_is_root_uuid(dsm->arg0)) {
+ nvdebug("Root UUID does not match.\n");
+ goto exit;
+ }
+
+ return dsm_write_root(dsm, out);
+ }
+
+ if (!dsm_is_dimm_uuid(dsm->arg0)) {
+ nvdebug("DIMM UUID does not match.\n");
+ goto exit;
+ }
+
+ return dsm_write_nvdimm(dsm, out);
+
+exit:
+ out->status = NFIT_STATUS_NOT_SUPPORTED;
}
static const MemoryRegionOps dsm_ops = {
--
2.1.0
--
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