add dax support

Signed-off-by: Lai Jiangshan <jiangshanlai@gmail.com>

Author: laijs

build/kernel

@@ -460,16 +460,17 @@ CONFIG_HAVE_MEMORY_PRESENT=y
 CONFIG_SPARSEMEM_EXTREME=y
 CONFIG_SPARSEMEM_VMEMMAP_ENABLE=y
 CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER=y
-# CONFIG_SPARSEMEM_VMEMMAP is not set
+CONFIG_SPARSEMEM_VMEMMAP=y
 CONFIG_HAVE_MEMBLOCK=y
 CONFIG_HAVE_MEMBLOCK_NODE_MAP=y
 CONFIG_ARCH_DISCARD_MEMBLOCK=y
+CONFIG_MEMORY_ISOLATION=y
 # CONFIG_MOVABLE_NODE is not set
-# CONFIG_HAVE_BOOTMEM_INFO_NODE is not set
+CONFIG_HAVE_BOOTMEM_INFO_NODE=y
 CONFIG_MEMORY_HOTPLUG=y
 CONFIG_MEMORY_HOTPLUG_SPARSE=y
 # CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE is not set
-# CONFIG_MEMORY_HOTREMOVE is not set
+CONFIG_MEMORY_HOTREMOVE=y
 CONFIG_SPLIT_PTLOCK_CPUS=4
 CONFIG_ARCH_ENABLE_SPLIT_PMD_PTLOCK=y
 CONFIG_MEMORY_BALLOON=y
@@ -496,6 +497,7 @@ CONFIG_GENERIC_EARLY_IOREMAP=y
 CONFIG_ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT=y
 # CONFIG_DEFERRED_STRUCT_PAGE_INIT is not set
 # CONFIG_IDLE_PAGE_TRACKING is not set
+CONFIG_ZONE_DEVICE=y
 CONFIG_ARCH_USES_HIGH_VMA_FLAGS=y
 CONFIG_ARCH_HAS_PKEYS=y
 # CONFIG_X86_PMEM_LEGACY is not set
@@ -585,7 +587,7 @@ CONFIG_ACPI_HOTPLUG_IOAPIC=y
 # CONFIG_ACPI_SBS is not set
 # CONFIG_ACPI_HED is not set
 # CONFIG_ACPI_REDUCED_HARDWARE_ONLY is not set
-# CONFIG_ACPI_NFIT is not set
+CONFIG_ACPI_NFIT=y
 CONFIG_HAVE_ACPI_APEI=y
 CONFIG_HAVE_ACPI_APEI_NMI=y
 # CONFIG_ACPI_APEI is not set
@@ -1359,6 +1361,7 @@ CONFIG_BLK_DEV_LOOP_MIN_COUNT=0
 CONFIG_BLK_DEV_RAM=y
 CONFIG_BLK_DEV_RAM_COUNT=16
 CONFIG_BLK_DEV_RAM_SIZE=16384
+# CONFIG_BLK_DEV_RAM_DAX is not set
 # CONFIG_CDROM_PKTCDVD is not set
 # CONFIG_ATA_OVER_ETH is not set
 CONFIG_XEN_BLKDEV_FRONTEND=y
@@ -2072,8 +2075,18 @@ CONFIG_ARM_GIC_MAX_NR=1
 # Android
 #
 # CONFIG_ANDROID is not set
-# CONFIG_LIBNVDIMM is not set
-# CONFIG_DEV_DAX is not set
+CONFIG_LIBNVDIMM=y
+CONFIG_BLK_DEV_PMEM=y
+CONFIG_ND_BLK=y
+CONFIG_ND_CLAIM=y
+CONFIG_ND_BTT=y
+CONFIG_BTT=y
+CONFIG_ND_PFN=y
+CONFIG_NVDIMM_PFN=y
+CONFIG_NVDIMM_DAX=y
+CONFIG_DEV_DAX=y
+CONFIG_DEV_DAX_PMEM=y
+CONFIG_NR_DEV_DAX=32768
 # CONFIG_NVMEM is not set
 # CONFIG_STM is not set
 # CONFIG_INTEL_TH is not set
@@ -2125,7 +2138,7 @@ CONFIG_XFS_POSIX_ACL=y
 # CONFIG_BTRFS_FS is not set
 # CONFIG_NILFS2_FS is not set
 # CONFIG_F2FS_FS is not set
-# CONFIG_FS_DAX is not set
+CONFIG_FS_DAX=y
 CONFIG_FS_POSIX_ACL=y
 CONFIG_EXPORTFS=y
 # CONFIG_EXPORTFS_BLOCK_OPS is not set
@@ -2294,6 +2307,8 @@ CONFIG_HAVE_DEBUG_KMEMLEAK=y
 CONFIG_DEBUG_MEMORY_INIT=y
 CONFIG_HAVE_DEBUG_STACKOVERFLOW=y
 CONFIG_HAVE_ARCH_KMEMCHECK=y
+CONFIG_HAVE_ARCH_KASAN=y
+# CONFIG_KASAN is not set
 CONFIG_ARCH_HAS_KCOV=y
 # CONFIG_KCOV is not set
 

build/kernel_config

@@ -574,7 +574,7 @@ static int hyper_setup_container_rootfs(void *data)
 
 	if (container->fstype) {
 		char dev[128];
-		char *options = NULL;
+		char options[128];
 		unsigned long flags = 0;
 
 		/* wait for rootfs ready message */
@@ -594,8 +594,11 @@ static int hyper_setup_container_rootfs(void *data)
 		if (container->readonly)
 			flags = MS_RDONLY;
 
+		memset(options, 0, sizeof(options));
+		if (strncmp(container->image, "pmem", 4) == 0)
+			strcat(options, ",dax");
 		if (!strncmp(container->fstype, "xfs", strlen("xfs")))
-			options = "nouuid";
+			strcat(options, ",nouuid");
 
 		if (mount(dev, root, container->fstype, flags, options) < 0) {
 			perror("mount device failed");