Merge tag 'riscv-for-linus-5.6-mw0' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

Pull RISC-V updates from Palmer Dabbelt:
 "This contains a handful of patches for this merge window:

   - Support for kasan

   - 32-bit physical addresses on rv32i-based systems

   - Support for CONFIG_DEBUG_VIRTUAL

   - DT entry for the FU540 GPIO controller, which has recently had a
     device driver merged

  These boot a buildroot-based system on QEMU's virt board for me"

* tag 'riscv-for-linus-5.6-mw0' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: dts: Add DT support for SiFive FU540 GPIO driver
  riscv: mm: add support for CONFIG_DEBUG_VIRTUAL
  riscv: keep 32-bit kernel to 32-bit phys_addr_t
  kasan: Add riscv to KASAN documentation.
  riscv: Add KASAN support
  kasan: No KASAN's memmove check if archs don't have it.

arch/riscv/kernel/head.S

@@ -121,6 +121,9 @@ clear_bss_done:
 	sw zero, TASK_TI_CPU(tp)
 	la sp, init_thread_union + THREAD_SIZE
 
+#ifdef CONFIG_KASAN
+	call kasan_early_init
+#endif
 	/* Start the kernel */
 	call parse_dtb
 	tail start_kernel

arch/riscv/kernel/riscv_ksyms.c

@@ -11,3 +11,5 @@
  */
 EXPORT_SYMBOL(memset);
 EXPORT_SYMBOL(memcpy);
+EXPORT_SYMBOL(__memset);
+EXPORT_SYMBOL(__memcpy);

arch/riscv/kernel/setup.c

@@ -24,6 +24,7 @@
 #include <asm/smp.h>
 #include <asm/tlbflush.h>
 #include <asm/thread_info.h>
+#include <asm/kasan.h>
 
 #include "head.h"
 
@@ -74,6 +75,10 @@ void __init setup_arch(char **cmdline_p)
 	swiotlb_init(1);
 #endif
 
+#ifdef CONFIG_KASAN
+	kasan_init();
+#endif
+
 #ifdef CONFIG_SMP
 	setup_smp();
 #endif

arch/riscv/kernel/vmlinux.lds.S

@@ -46,6 +46,7 @@ SECTIONS
 		KPROBES_TEXT
 		ENTRY_TEXT
 		IRQENTRY_TEXT
+		SOFTIRQENTRY_TEXT
 		*(.fixup)
 		_etext = .;
 	}