dm: add ssram support for user VM

Hook ssram init && de-init functions to vdev
 devices lifecycle management:

 1) initialize ssram when vdev devices
    are initialized.

 2) de-initialize ssram when vdev devices
    are reset or destroyed.

 notes:
 ssram configuration data can be released only when
 user VM shutdown, hence it can't be done in deinit_vssram().

  - VM reboot:
    do deinit_vssram() only.

  - VM shutdown:
    do both deinit_vssram() and clean_vssram_config().

Tracked-On: #7010
Signed-off-by: Yonghua Huang <yonghua.huang@intel.com>
Acked-by: Wang Yu1 <yu1.wang@intel.com>

devicemodel/core/main.c

@@ -484,6 +484,9 @@ vm_init_vdevs(struct vmctx *ctx)
 	if (debugexit_enabled)
 		init_debugexit();
 
+	if ((ssram) && (init_vssram(ctx) < 0))
+		goto ssram_fail;
+
 	ret = monitor_init(ctx);
 	if (ret < 0)
 		goto monitor_fail;
@@ -505,6 +508,9 @@ pci_fail:
 	deinit_mmio_devs(ctx);
 mmio_dev_fail:
 	monitor_close();
+ssram_fail:
+	if (ssram)
+		deinit_vssram(ctx);
 monitor_fail:
 	if (debugexit_enabled)
 		deinit_debugexit();
@@ -539,6 +545,9 @@ vm_deinit_vdevs(struct vmctx *ctx)
 	if (debugexit_enabled)
 		deinit_debugexit();
 
+	if (ssram)
+		deinit_vssram(ctx);
+
 	vhpet_deinit(ctx);
 	vpit_deinit(ctx);
 	vrtc_deinit(ctx);
@@ -574,6 +583,9 @@ vm_reset_vdevs(struct vmctx *ctx)
 	if (debugexit_enabled)
 		deinit_debugexit();
 
+	if (ssram)
+		deinit_vssram(ctx);
+
 	vhpet_deinit(ctx);
 	vpit_deinit(ctx);
 	vrtc_deinit(ctx);
@@ -591,6 +603,9 @@ vm_reset_vdevs(struct vmctx *ctx)
 	if (debugexit_enabled)
 		init_debugexit();
 
+	if (ssram)
+		init_vssram(ctx);
+
 	ioapic_init(ctx);
 	init_pci(ctx);
 

devicemodel/hw/platform/vssram/vssram.c

@@ -1302,6 +1302,28 @@ exit:
 	}
 	return status;
 }
+
+/**
+ * @brief De-initialize software SRAM device
+ *
+ * @param ctx  Pointer to context of user VM.
+ *
+ * @return void
+ */
+void deinit_vssram(struct vmctx *ctx)
+{
+	vssram_close_buffers();
+	if (vssram_buffers) {
+		free(vssram_buffers);
+		vssram_buffers = NULL;
+	}
+
+	if (vrtct_table != NULL) {
+		free(vrtct_table);
+		vrtct_table = NULL;
+	}
+}
+
 /**
  * @brief Cleanup vSSRAM configurations resource.
  *

devicemodel/include/vssram.h

@@ -52,6 +52,7 @@ uint64_t get_vssram_size(void);
 uint8_t *get_vssram_vrtct(void);
 void clean_vssram_configs(void);
 int init_vssram(struct vmctx *ctx);
+void deinit_vssram(struct vmctx *ctx);
 int parse_vssram_buf_params(const char *opt);
 
 #endif  /* RTCT_H */