VisionFive 2 devel kexec backport

arch/arm64/include/asm/kexec.h

@@ -103,7 +103,9 @@ extern const struct kexec_file_ops kexec_image_ops;
 
 struct kimage;
 
-extern int arch_kimage_file_post_load_cleanup(struct kimage *image);
+int arch_kimage_file_post_load_cleanup(struct kimage *image);
+#define arch_kimage_file_post_load_cleanup arch_kimage_file_post_load_cleanup
+
 extern int load_other_segments(struct kimage *image,
 		unsigned long kernel_load_addr, unsigned long kernel_size,
 		char *initrd, unsigned long initrd_len,

arch/powerpc/include/asm/kexec.h

@@ -119,6 +119,15 @@ int setup_purgatory(struct kimage *image, const void *slave_code,
 #ifdef CONFIG_PPC64
 struct kexec_buf;
 
+int arch_kexec_kernel_image_probe(struct kimage *image, void *buf, unsigned long buf_len);
+#define arch_kexec_kernel_image_probe arch_kexec_kernel_image_probe
+
+int arch_kimage_file_post_load_cleanup(struct kimage *image);
+#define arch_kimage_file_post_load_cleanup arch_kimage_file_post_load_cleanup
+
+int arch_kexec_locate_mem_hole(struct kexec_buf *kbuf);
+#define arch_kexec_locate_mem_hole arch_kexec_locate_mem_hole
+
 int load_crashdump_segments_ppc64(struct kimage *image,
 				  struct kexec_buf *kbuf);
 int setup_purgatory_ppc64(struct kimage *image, const void *slave_code,

arch/riscv/Kbuild

@@ -2,3 +2,9 @@
 
 obj-y += kernel/ mm/ net/
 obj-$(CONFIG_BUILTIN_DTB) += boot/dts/
+obj-$(CONFIG_ARCH_HAS_KEXEC_PURGATORY) += purgatory/
+
+obj-$(CONFIG_ARCH_HAS_KEXEC_PURGATORY) += purgatory/
+
+# for cleaning
+subdir- += boot

arch/riscv/Kconfig

@@ -63,6 +63,7 @@ config RISCV
 	select GENERIC_SCHED_CLOCK
 	select GENERIC_SMP_IDLE_THREAD
 	select GENERIC_TIME_VSYSCALL if MMU && 64BIT
+	select GENERIC_VDSO_TIME_NS if HAVE_GENERIC_VDSO
 	select HANDLE_DOMAIN_IRQ
 	select HAVE_ARCH_AUDITSYSCALL
 	select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
@@ -405,6 +406,20 @@ config KEXEC
 
 	  The name comes from the similarity to the exec system call.
 
+config KEXEC_FILE
+	bool "kexec file based systmem call"
+	depends on 64BIT && MMU
+	select HAVE_IMA_KEXEC if IMA
+	select KEXEC_CORE
+	select KEXEC_ELF
+	help
+	  This is new version of kexec system call. This system call is
+	  file based and takes file descriptors as system call argument
+	  for kernel and initramfs as opposed to list of segments as
+	  accepted by previous system call.
+
+	  If you don't know what to do here, say Y.
+
 config CRASH_DUMP
 	bool "Build kdump crash kernel"
 	help

arch/riscv/boot/dts/starfive/jh7110.dtsi

@@ -1662,7 +1662,7 @@
 			status = "disabled";
 		};
 
-		 mipi_dsi: mipi@295d0000 {
+		mipi_dsi: mipi@295d0000 {
 			compatible = "starfive,jh7110-mipi_dsi","cdns,dsi";
 			reg = <0x0 0x295d0000 0x0 0x10000>;
 			interrupts = <98>;

arch/riscv/configs/vf2-cpu-defconfig

@@ -0,0 +1,233 @@
+CONFIG_DEFAULT_HOSTNAME="(cyrevolt)"
+CONFIG_SYSVIPC=y
+CONFIG_POSIX_MQUEUE=y
+CONFIG_NO_HZ_IDLE=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_BPF_SYSCALL=y
+CONFIG_BPF_UNPRIV_DEFAULT_OFF=y
+CONFIG_IKCONFIG=y
+CONFIG_IKCONFIG_PROC=y
+CONFIG_CGROUPS=y
+CONFIG_MEMCG=y
+CONFIG_CGROUP_SCHED=y
+CONFIG_CFS_BANDWIDTH=y
+CONFIG_RT_GROUP_SCHED=y
+CONFIG_CGROUP_PIDS=y
+CONFIG_CGROUP_FREEZER=y
+CONFIG_CGROUP_HUGETLB=y
+CONFIG_CPUSETS=y
+CONFIG_CGROUP_DEVICE=y
+CONFIG_CGROUP_CPUACCT=y
+CONFIG_CGROUP_PERF=y
+CONFIG_CGROUP_BPF=y
+CONFIG_NAMESPACES=y
+CONFIG_USER_NS=y
+CONFIG_CHECKPOINT_RESTORE=y
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_INITRAMFS_SOURCE="init.cpio.xz"
+# CONFIG_RD_BZIP2 is not set
+# CONFIG_RD_LZMA is not set
+# CONFIG_RD_LZO is not set
+# CONFIG_RD_LZ4 is not set
+CONFIG_EXPERT=y
+# CONFIG_SYSFS_SYSCALL is not set
+CONFIG_PROFILING=y
+CONFIG_SOC_MICROCHIP_POLARFIRE=y
+CONFIG_SOC_STARFIVE=y
+CONFIG_SOC_STARFIVE_JH7110=y
+CONFIG_SOC_VIRT=y
+CONFIG_SMP=y
+CONFIG_KEXEC=y
+# CONFIG_EFI is not set
+CONFIG_CPU_IDLE=y
+CONFIG_RISCV_SBI_CPUIDLE=y
+CONFIG_JUMP_LABEL=y
+CONFIG_COMPAT_32BIT_TIME=y
+CONFIG_MODULES=y
+CONFIG_MODULE_UNLOAD=y
+CONFIG_SPARSEMEM_MANUAL=y
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_XFRM_USER=m
+CONFIG_INET=y
+CONFIG_IP_MULTICAST=y
+CONFIG_IP_ADVANCED_ROUTER=y
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_DHCP=y
+CONFIG_IP_PNP_BOOTP=y
+CONFIG_IP_PNP_RARP=y
+CONFIG_INET_ESP=m
+# CONFIG_IPV6 is not set
+CONFIG_NETLINK_DIAG=y
+CONFIG_CGROUP_NET_PRIO=y
+CONFIG_CGROUP_NET_CLASSID=y
+# CONFIG_WIRELESS is not set
+CONFIG_NET_9P=y
+CONFIG_NET_9P_VIRTIO=y
+CONFIG_PCI=y
+CONFIG_PCIEPORTBUS=y
+CONFIG_PCI_HOST_GENERIC=y
+CONFIG_PCIE_XILINX=y
+CONFIG_PCIE_PLDA=y
+CONFIG_PCIE_FU740=y
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+# CONFIG_FW_LOADER is not set
+CONFIG_BLK_DEV_LOOP=y
+CONFIG_VIRTIO_BLK=y
+CONFIG_BLK_DEV_NVME=y
+CONFIG_NVME_MULTIPATH=y
+CONFIG_NVME_HWMON=y
+CONFIG_NVME_FC=y
+CONFIG_NVME_TARGET=y
+CONFIG_NVME_TARGET_PASSTHRU=y
+CONFIG_NVME_TARGET_LOOP=y
+CONFIG_NETDEVICES=y
+CONFIG_DUMMY=y
+# CONFIG_NET_VENDOR_3COM is not set
+# CONFIG_NET_VENDOR_ADAPTEC is not set
+# CONFIG_NET_VENDOR_AGERE is not set
+# CONFIG_NET_VENDOR_AMAZON is not set
+# CONFIG_NET_VENDOR_AMD is not set
+# CONFIG_NET_VENDOR_AQUANTIA is not set
+# CONFIG_NET_VENDOR_ARC is not set
+# CONFIG_NET_VENDOR_ATHEROS is not set
+# CONFIG_NET_VENDOR_BROADCOM is not set
+# CONFIG_NET_VENDOR_BROCADE is not set
+CONFIG_MACB=y
+# CONFIG_NET_VENDOR_CAVIUM is not set
+# CONFIG_NET_VENDOR_CHELSIO is not set
+# CONFIG_NET_VENDOR_CISCO is not set
+# CONFIG_NET_VENDOR_CORTINA is not set
+# CONFIG_NET_VENDOR_DEC is not set
+# CONFIG_NET_VENDOR_DLINK is not set
+# CONFIG_NET_VENDOR_EMULEX is not set
+# CONFIG_NET_VENDOR_EZCHIP is not set
+# CONFIG_NET_VENDOR_GOOGLE is not set
+# CONFIG_NET_VENDOR_HUAWEI is not set
+# CONFIG_NET_VENDOR_INTEL is not set
+# CONFIG_NET_VENDOR_MICROSOFT is not set
+# CONFIG_NET_VENDOR_LITEX is not set
+# CONFIG_NET_VENDOR_MARVELL is not set
+# CONFIG_NET_VENDOR_MELLANOX is not set
+# CONFIG_NET_VENDOR_MICREL is not set
+# CONFIG_NET_VENDOR_MICROCHIP is not set
+# CONFIG_NET_VENDOR_MICROSEMI is not set
+# CONFIG_NET_VENDOR_MYRI is not set
+# CONFIG_NET_VENDOR_NATSEMI is not set
+# CONFIG_NET_VENDOR_NETERION is not set
+# CONFIG_NET_VENDOR_NETRONOME is not set
+# CONFIG_NET_VENDOR_NI is not set
+# CONFIG_NET_VENDOR_NVIDIA is not set
+# CONFIG_NET_VENDOR_OKI is not set
+# CONFIG_NET_VENDOR_PACKET_ENGINES is not set
+# CONFIG_NET_VENDOR_PENSANDO is not set
+# CONFIG_NET_VENDOR_QLOGIC is not set
+# CONFIG_NET_VENDOR_QUALCOMM is not set
+# CONFIG_NET_VENDOR_RDC is not set
+# CONFIG_NET_VENDOR_REALTEK is not set
+# CONFIG_NET_VENDOR_RENESAS is not set
+# CONFIG_NET_VENDOR_ROCKER is not set
+# CONFIG_NET_VENDOR_SAMSUNG is not set
+# CONFIG_NET_VENDOR_SEEQ is not set
+# CONFIG_NET_VENDOR_SOLARFLARE is not set
+# CONFIG_NET_VENDOR_SILAN is not set
+# CONFIG_NET_VENDOR_SIS is not set
+# CONFIG_NET_VENDOR_SMSC is not set
+# CONFIG_NET_VENDOR_SOCIONEXT is not set
+CONFIG_STMMAC_ETH=y
+CONFIG_DWMAC_STARFIVE_PLAT=y
+# CONFIG_NET_VENDOR_SUN is not set
+# CONFIG_NET_VENDOR_TEHUTI is not set
+# CONFIG_NET_VENDOR_TI is not set
+# CONFIG_NET_VENDOR_VIA is not set
+# CONFIG_NET_VENDOR_WIZNET is not set
+# CONFIG_NET_VENDOR_XILINX is not set
+CONFIG_MICROSEMI_PHY=y
+CONFIG_MOTORCOMM_PHY=y
+# CONFIG_WLAN is not set
+# CONFIG_INPUT_KEYBOARD is not set
+# CONFIG_INPUT_MOUSE is not set
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_8250_DW=y
+CONFIG_SERIAL_OF_PLATFORM=y
+CONFIG_HVC_RISCV_SBI=y
+CONFIG_VIRTIO_CONSOLE=y
+CONFIG_HW_RANDOM=y
+CONFIG_HW_RANDOM_VIRTIO=y
+CONFIG_HW_RANDOM_STARFIVE=y
+CONFIG_SPI=y
+CONFIG_SPI_PL022_STARFIVE=y
+CONFIG_SPI_SIFIVE=y
+# CONFIG_PTP_1588_CLOCK is not set
+CONFIG_PINCTRL=y
+CONFIG_PINCTRL_STARFIVE=y
+CONFIG_PINCTRL_STARFIVE_JH7110=y
+CONFIG_GPIO_SIFIVE=y
+CONFIG_WATCHDOG=y
+CONFIG_STARFIVE_WATCHDOG=y
+CONFIG_REGULATOR=y
+CONFIG_REGULATOR_FIXED_VOLTAGE=y
+# CONFIG_VGA_CONSOLE is not set
+# CONFIG_USB_SUPPORT is not set
+CONFIG_RTC_CLASS=y
+CONFIG_RTC_DRV_STARFIVE=y
+CONFIG_DMADEVICES=y
+# CONFIG_VIRTIO_MENU is not set
+# CONFIG_VHOST_MENU is not set
+CONFIG_MAILBOX=y
+CONFIG_STARFIVE_MBOX=y
+CONFIG_STARFIVE_MBOX_TEST=y
+CONFIG_SIFIVE_L2_FLUSH_START=0x40000000
+CONFIG_SIFIVE_L2_FLUSH_SIZE=0x400000000
+CONFIG_STARFIVE_PMU=y
+CONFIG_PWM=y
+CONFIG_PWM_STARFIVE_PTC=y
+CONFIG_EXT4_FS=y
+CONFIG_EXT4_FS_POSIX_ACL=y
+CONFIG_EXT4_FS_SECURITY=y
+CONFIG_AUTOFS4_FS=y
+CONFIG_MSDOS_FS=y
+CONFIG_VFAT_FS=y
+CONFIG_TMPFS=y
+CONFIG_TMPFS_POSIX_ACL=y
+CONFIG_HUGETLBFS=y
+CONFIG_CONFIGFS_FS=y
+# CONFIG_MISC_FILESYSTEMS is not set
+CONFIG_9P_FS=y
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_ISO8859_1=y
+CONFIG_CRYPTO_AUTHENC=y
+CONFIG_CRYPTO_GCM=y
+CONFIG_CRYPTO_SEQIV=y
+CONFIG_CRYPTO_ECHAINIV=y
+CONFIG_CRYPTO_CBC=y
+CONFIG_CRYPTO_SHA512=y
+CONFIG_CRYPTO_AES=y
+CONFIG_CRYPTO_USER_API_HASH=y
+CONFIG_LIBCRC32C=y
+CONFIG_PRINTK_TIME=y
+CONFIG_DEBUG_FS=y
+# CONFIG_DEBUG_MISC is not set
+CONFIG_DEBUG_PAGEALLOC=y
+CONFIG_SCHED_STACK_END_CHECK=y
+CONFIG_DEBUG_VM=y
+CONFIG_DEBUG_VM_PGFLAGS=y
+CONFIG_DEBUG_MEMORY_INIT=y
+CONFIG_DEBUG_PER_CPU_MAPS=y
+CONFIG_SOFTLOCKUP_DETECTOR=y
+CONFIG_WQ_WATCHDOG=y
+CONFIG_DEBUG_TIMEKEEPING=y
+CONFIG_DEBUG_RWSEMS=y
+CONFIG_DEBUG_ATOMIC_SLEEP=y
+CONFIG_STACKTRACE=y
+CONFIG_DEBUG_LIST=y
+CONFIG_DEBUG_PLIST=y
+CONFIG_DEBUG_SG=y
+# CONFIG_RCU_TRACE is not set
+CONFIG_RCU_EQS_DEBUG=y
+# CONFIG_FTRACE is not set
+# CONFIG_RUNTIME_TESTING_MENU is not set
+CONFIG_MEMTEST=y

arch/riscv/include/asm/kexec.h

@@ -39,6 +39,7 @@ crash_setup_regs(struct pt_regs *newregs,
 #define ARCH_HAS_KIMAGE_ARCH
 
 struct kimage_arch {
+	void *fdt; /* For CONFIG_KEXEC_FILE */
 	unsigned long fdt_addr;
 };
 
@@ -53,4 +54,19 @@ typedef void (*riscv_kexec_method)(unsigned long first_ind_entry,
 
 extern riscv_kexec_method riscv_kexec_norelocate;
 
+#ifdef CONFIG_KEXEC_FILE
+extern const struct kexec_file_ops elf_kexec_ops;
+
+struct purgatory_info;
+int arch_kexec_apply_relocations_add(struct purgatory_info *pi,
+				     Elf_Shdr *section,
+				     const Elf_Shdr *relsec,
+				     const Elf_Shdr *symtab);
+#define arch_kexec_apply_relocations_add arch_kexec_apply_relocations_add
+
+struct kimage;
+int arch_kimage_file_post_load_cleanup(struct kimage *image);
+#define arch_kimage_file_post_load_cleanup arch_kimage_file_post_load_cleanup
+#endif
+
 #endif

arch/riscv/include/asm/mmu.h

@@ -19,6 +19,8 @@ typedef struct {
 #ifdef CONFIG_SMP
 	/* A local icache flush is needed before user execution can resume. */
 	cpumask_t icache_stale_mask;
+	/* A local tlb flush is needed before user execution can resume. */
+	cpumask_t tlb_stale_mask;
 #endif
 } mm_context_t;
 

arch/riscv/include/asm/pgtable.h

@@ -386,7 +386,7 @@ static inline void update_mmu_cache(struct vm_area_struct *vma,
 	 * Relying on flush_tlb_fix_spurious_fault would suffice, but
 	 * the extra traps reduce performance.  So, eagerly SFENCE.VMA.
 	 */
-	local_flush_tlb_page(address);
+	flush_tlb_page(vma, address);
 }
 
 static inline void update_mmu_cache_pmd(struct vm_area_struct *vma,

arch/riscv/include/asm/string.h

@@ -18,6 +18,16 @@ extern asmlinkage void *__memcpy(void *, const void *, size_t);
 #define __HAVE_ARCH_MEMMOVE
 extern asmlinkage void *memmove(void *, const void *, size_t);
 extern asmlinkage void *__memmove(void *, const void *, size_t);
+
+#define __HAVE_ARCH_STRCMP
+extern asmlinkage int strcmp(const char *cs, const char *ct);
+
+#define __HAVE_ARCH_STRLEN
+extern asmlinkage __kernel_size_t strlen(const char *);
+
+#define __HAVE_ARCH_STRNCMP
+extern asmlinkage int strncmp(const char *cs, const char *ct, size_t count);
+
 /* For those files which don't want to check by kasan. */
 #if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__)
 #define memcpy(dst, src, len) __memcpy(dst, src, len)

arch/riscv/include/asm/tlbflush.h

@@ -22,6 +22,24 @@ static inline void local_flush_tlb_page(unsigned long addr)
 {
 	ALT_FLUSH_TLB_PAGE(__asm__ __volatile__ ("sfence.vma %0" : : "r" (addr) : "memory"));
 }
+
+static inline void local_flush_tlb_all_asid(unsigned long asid)
+{
+	__asm__ __volatile__ ("sfence.vma x0, %0"
+			:
+			: "r" (asid)
+			: "memory");
+}
+
+static inline void local_flush_tlb_page_asid(unsigned long addr,
+		unsigned long asid)
+{
+	__asm__ __volatile__ ("sfence.vma %0, %1"
+			:
+			: "r" (addr), "r" (asid)
+			: "memory");
+}
+
 #else /* CONFIG_MMU */
 #define local_flush_tlb_all()			do { } while (0)
 #define local_flush_tlb_page(addr)		do { } while (0)