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

Pull RISC-V fixes from Palmer Dabbelt:
 "Sorry for the last minute patches, but a few things fell through the
  cracks recently. I was on the fence about sending a late pull request
  just for the M-mode fixes, as we don't really have any users, but the
  last patch fixes the build for Fedora which I consider pretty
  important.

  Given that the M-mode fixes should be very low risk, I figured it's
  worth sending them along as well.

  Thhis passes my standard 'boot in QEMU' test"

* tag 'riscv-for-linus-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  RISC-V: Move all address space definition macros to one place
  RISC-V: Only select essential drivers for SOC_VIRT config
  riscv: fix the IPI missing issue in nommu mode
  riscv: uaccess should be used in nommu mode

arch/riscv/Kconfig

@@ -50,7 +50,6 @@ config RISCV
 	select PCI_DOMAINS_GENERIC if PCI
 	select PCI_MSI if PCI
 	select RISCV_TIMER
-	select UACCESS_MEMCPY if !MMU
 	select GENERIC_IRQ_MULTI_HANDLER
 	select GENERIC_ARCH_TOPOLOGY if SMP
 	select ARCH_HAS_PTE_SPECIAL

arch/riscv/Kconfig.socs

@@ -12,20 +12,6 @@ config SOC_SIFIVE
 
 config SOC_VIRT
        bool "QEMU Virt Machine"
-       select VIRTIO_PCI
-       select VIRTIO_BALLOON
-       select VIRTIO_MMIO
-       select VIRTIO_CONSOLE
-       select VIRTIO_NET
-       select NET_9P_VIRTIO
-       select VIRTIO_BLK
-       select SCSI_VIRTIO
-       select DRM_VIRTIO_GPU
-       select HW_RANDOM_VIRTIO
-       select RPMSG_CHAR
-       select RPMSG_VIRTIO
-       select CRYPTO_DEV_VIRTIO
-       select VIRTIO_INPUT
        select POWER_RESET_SYSCON
        select POWER_RESET_SYSCON_POWEROFF
        select GOLDFISH

arch/riscv/configs/defconfig

@@ -31,6 +31,7 @@ CONFIG_IP_PNP_BOOTP=y
 CONFIG_IP_PNP_RARP=y
 CONFIG_NETLINK_DIAG=y
 CONFIG_NET_9P=y
+CONFIG_NET_9P_VIRTIO=y
 CONFIG_PCI=y
 CONFIG_PCIEPORTBUS=y
 CONFIG_PCI_HOST_GENERIC=y
@@ -38,12 +39,15 @@ CONFIG_PCIE_XILINX=y
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 CONFIG_BLK_DEV_LOOP=y
+CONFIG_VIRTIO_BLK=y
 CONFIG_BLK_DEV_SD=y
 CONFIG_BLK_DEV_SR=y
+CONFIG_SCSI_VIRTIO=y
 CONFIG_ATA=y
 CONFIG_SATA_AHCI=y
 CONFIG_SATA_AHCI_PLATFORM=y
 CONFIG_NETDEVICES=y
+CONFIG_VIRTIO_NET=y
 CONFIG_MACB=y
 CONFIG_E1000E=y
 CONFIG_R8169=y
@@ -54,13 +58,16 @@ CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_OF_PLATFORM=y
 CONFIG_SERIAL_EARLYCON_RISCV_SBI=y
 CONFIG_HVC_RISCV_SBI=y
+CONFIG_VIRTIO_CONSOLE=y
 CONFIG_HW_RANDOM=y
+CONFIG_HW_RANDOM_VIRTIO=y
 CONFIG_SPI=y
 CONFIG_SPI_SIFIVE=y
 # CONFIG_PTP_1588_CLOCK is not set
 CONFIG_POWER_RESET=y
 CONFIG_DRM=y
 CONFIG_DRM_RADEON=y
+CONFIG_DRM_VIRTIO_GPU=y
 CONFIG_FRAMEBUFFER_CONSOLE=y
 CONFIG_USB=y
 CONFIG_USB_XHCI_HCD=y
@@ -74,6 +81,12 @@ CONFIG_USB_UAS=y
 CONFIG_MMC=y
 CONFIG_MMC_SPI=y
 CONFIG_RTC_CLASS=y
+CONFIG_VIRTIO_PCI=y
+CONFIG_VIRTIO_BALLOON=y
+CONFIG_VIRTIO_INPUT=y
+CONFIG_VIRTIO_MMIO=y
+CONFIG_RPMSG_CHAR=y
+CONFIG_RPMSG_VIRTIO=y
 CONFIG_EXT4_FS=y
 CONFIG_EXT4_FS_POSIX_ACL=y
 CONFIG_AUTOFS4_FS=y
@@ -88,16 +101,17 @@ CONFIG_NFS_V4_2=y
 CONFIG_ROOT_NFS=y
 CONFIG_9P_FS=y
 CONFIG_CRYPTO_USER_API_HASH=y
+CONFIG_CRYPTO_DEV_VIRTIO=y
 CONFIG_PRINTK_TIME=y
 CONFIG_DEBUG_FS=y
 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_SCHED_STACK_END_CHECK=y
 CONFIG_DEBUG_TIMEKEEPING=y
 CONFIG_DEBUG_RT_MUTEXES=y
 CONFIG_DEBUG_SPINLOCK=y

arch/riscv/configs/rv32_defconfig

@@ -31,6 +31,7 @@ CONFIG_IP_PNP_BOOTP=y
 CONFIG_IP_PNP_RARP=y
 CONFIG_NETLINK_DIAG=y
 CONFIG_NET_9P=y
+CONFIG_NET_9P_VIRTIO=y
 CONFIG_PCI=y
 CONFIG_PCIEPORTBUS=y
 CONFIG_PCI_HOST_GENERIC=y
@@ -38,12 +39,15 @@ CONFIG_PCIE_XILINX=y
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 CONFIG_BLK_DEV_LOOP=y
+CONFIG_VIRTIO_BLK=y
 CONFIG_BLK_DEV_SD=y
 CONFIG_BLK_DEV_SR=y
+CONFIG_SCSI_VIRTIO=y
 CONFIG_ATA=y
 CONFIG_SATA_AHCI=y
 CONFIG_SATA_AHCI_PLATFORM=y
 CONFIG_NETDEVICES=y
+CONFIG_VIRTIO_NET=y
 CONFIG_MACB=y
 CONFIG_E1000E=y
 CONFIG_R8169=y
@@ -54,11 +58,14 @@ CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_OF_PLATFORM=y
 CONFIG_SERIAL_EARLYCON_RISCV_SBI=y
 CONFIG_HVC_RISCV_SBI=y
+CONFIG_VIRTIO_CONSOLE=y
 CONFIG_HW_RANDOM=y
+CONFIG_HW_RANDOM_VIRTIO=y
 # CONFIG_PTP_1588_CLOCK is not set
 CONFIG_POWER_RESET=y
 CONFIG_DRM=y
 CONFIG_DRM_RADEON=y
+CONFIG_DRM_VIRTIO_GPU=y
 CONFIG_FRAMEBUFFER_CONSOLE=y
 CONFIG_USB=y
 CONFIG_USB_XHCI_HCD=y
@@ -70,6 +77,12 @@ CONFIG_USB_OHCI_HCD_PLATFORM=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_UAS=y
 CONFIG_RTC_CLASS=y
+CONFIG_VIRTIO_PCI=y
+CONFIG_VIRTIO_BALLOON=y
+CONFIG_VIRTIO_INPUT=y
+CONFIG_VIRTIO_MMIO=y
+CONFIG_RPMSG_CHAR=y
+CONFIG_RPMSG_VIRTIO=y
 CONFIG_EXT4_FS=y
 CONFIG_EXT4_FS_POSIX_ACL=y
 CONFIG_AUTOFS4_FS=y
@@ -84,16 +97,17 @@ CONFIG_NFS_V4_2=y
 CONFIG_ROOT_NFS=y
 CONFIG_9P_FS=y
 CONFIG_CRYPTO_USER_API_HASH=y
+CONFIG_CRYPTO_DEV_VIRTIO=y
 CONFIG_PRINTK_TIME=y
 CONFIG_DEBUG_FS=y
 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_SCHED_STACK_END_CHECK=y
 CONFIG_DEBUG_TIMEKEEPING=y
 CONFIG_DEBUG_RT_MUTEXES=y
 CONFIG_DEBUG_SPINLOCK=y

arch/riscv/include/asm/clint.h

@@ -15,12 +15,12 @@ static inline void clint_send_ipi_single(unsigned long hartid)
 	writel(1, clint_ipi_base + hartid);
 }
 
-static inline void clint_send_ipi_mask(const struct cpumask *hartid_mask)
+static inline void clint_send_ipi_mask(const struct cpumask *mask)
 {
-	int hartid;
+	int cpu;
 
-	for_each_cpu(hartid, hartid_mask)
-		clint_send_ipi_single(hartid);
+	for_each_cpu(cpu, mask)
+		clint_send_ipi_single(cpuid_to_hartid_map(cpu));
 }
 
 static inline void clint_clear_ipi(unsigned long hartid)

arch/riscv/include/asm/pgtable.h

@@ -19,6 +19,47 @@
 #include <asm/tlbflush.h>
 #include <linux/mm_types.h>
 
+#ifdef CONFIG_MMU
+
+#define VMALLOC_SIZE     (KERN_VIRT_SIZE >> 1)
+#define VMALLOC_END      (PAGE_OFFSET - 1)
+#define VMALLOC_START    (PAGE_OFFSET - VMALLOC_SIZE)
+
+#define BPF_JIT_REGION_SIZE	(SZ_128M)
+#define BPF_JIT_REGION_START	(PAGE_OFFSET - BPF_JIT_REGION_SIZE)
+#define BPF_JIT_REGION_END	(VMALLOC_END)
+
+/*
+ * Roughly size the vmemmap space to be large enough to fit enough
+ * struct pages to map half the virtual address space. Then
+ * position vmemmap directly below the VMALLOC region.
+ */
+#define VMEMMAP_SHIFT \
+	(CONFIG_VA_BITS - PAGE_SHIFT - 1 + STRUCT_PAGE_MAX_SHIFT)
+#define VMEMMAP_SIZE	BIT(VMEMMAP_SHIFT)
+#define VMEMMAP_END	(VMALLOC_START - 1)
+#define VMEMMAP_START	(VMALLOC_START - VMEMMAP_SIZE)
+
+/*
+ * Define vmemmap for pfn_to_page & page_to_pfn calls. Needed if kernel
+ * is configured with CONFIG_SPARSEMEM_VMEMMAP enabled.
+ */
+#define vmemmap		((struct page *)VMEMMAP_START)
+
+#define PCI_IO_SIZE      SZ_16M
+#define PCI_IO_END       VMEMMAP_START
+#define PCI_IO_START     (PCI_IO_END - PCI_IO_SIZE)
+
+#define FIXADDR_TOP      PCI_IO_START
+#ifdef CONFIG_64BIT
+#define FIXADDR_SIZE     PMD_SIZE
+#else
+#define FIXADDR_SIZE     PGDIR_SIZE
+#endif
+#define FIXADDR_START    (FIXADDR_TOP - FIXADDR_SIZE)
+
+#endif
+
 #ifdef CONFIG_64BIT
 #include <asm/pgtable-64.h>
 #else
@@ -90,31 +131,6 @@ extern pgd_t swapper_pg_dir[];
 #define __S110	PAGE_SHARED_EXEC
 #define __S111	PAGE_SHARED_EXEC
 
-#define VMALLOC_SIZE     (KERN_VIRT_SIZE >> 1)
-#define VMALLOC_END      (PAGE_OFFSET - 1)
-#define VMALLOC_START    (PAGE_OFFSET - VMALLOC_SIZE)
-
-#define BPF_JIT_REGION_SIZE	(SZ_128M)
-#define BPF_JIT_REGION_START	(PAGE_OFFSET - BPF_JIT_REGION_SIZE)
-#define BPF_JIT_REGION_END	(VMALLOC_END)
-
-/*
- * Roughly size the vmemmap space to be large enough to fit enough
- * struct pages to map half the virtual address space. Then
- * position vmemmap directly below the VMALLOC region.
- */
-#define VMEMMAP_SHIFT \
-	(CONFIG_VA_BITS - PAGE_SHIFT - 1 + STRUCT_PAGE_MAX_SHIFT)
-#define VMEMMAP_SIZE	BIT(VMEMMAP_SHIFT)
-#define VMEMMAP_END	(VMALLOC_START - 1)
-#define VMEMMAP_START	(VMALLOC_START - VMEMMAP_SIZE)
-
-/*
- * Define vmemmap for pfn_to_page & page_to_pfn calls. Needed if kernel
- * is configured with CONFIG_SPARSEMEM_VMEMMAP enabled.
- */
-#define vmemmap		((struct page *)VMEMMAP_START)
-
 static inline int pmd_present(pmd_t pmd)
 {
 	return (pmd_val(pmd) & (_PAGE_PRESENT | _PAGE_PROT_NONE));
@@ -432,18 +448,6 @@ static inline int ptep_clear_flush_young(struct vm_area_struct *vma,
 #define __pte_to_swp_entry(pte)	((swp_entry_t) { pte_val(pte) })
 #define __swp_entry_to_pte(x)	((pte_t) { (x).val })
 
-#define PCI_IO_SIZE      SZ_16M
-#define PCI_IO_END       VMEMMAP_START
-#define PCI_IO_START     (PCI_IO_END - PCI_IO_SIZE)
-
-#define FIXADDR_TOP      PCI_IO_START
-#ifdef CONFIG_64BIT
-#define FIXADDR_SIZE     PMD_SIZE
-#else
-#define FIXADDR_SIZE     PGDIR_SIZE
-#endif
-#define FIXADDR_START    (FIXADDR_TOP - FIXADDR_SIZE)
-
 /*
  * Task size is 0x4000000000 for RV64 or 0x9fc00000 for RV32.
  * Note that PGDIR_SIZE must evenly divide TASK_SIZE.

arch/riscv/include/asm/uaccess.h

@@ -11,6 +11,24 @@
 /*
  * User space memory access functions
  */
+
+extern unsigned long __must_check __asm_copy_to_user(void __user *to,
+	const void *from, unsigned long n);
+extern unsigned long __must_check __asm_copy_from_user(void *to,
+	const void __user *from, unsigned long n);
+
+static inline unsigned long
+raw_copy_from_user(void *to, const void __user *from, unsigned long n)
+{
+	return __asm_copy_from_user(to, from, n);
+}
+
+static inline unsigned long
+raw_copy_to_user(void __user *to, const void *from, unsigned long n)
+{
+	return __asm_copy_to_user(to, from, n);
+}
+
 #ifdef CONFIG_MMU
 #include <linux/errno.h>
 #include <linux/compiler.h>
@@ -367,24 +385,6 @@ do {								\
 		-EFAULT;					\
 })
 
-
-extern unsigned long __must_check __asm_copy_to_user(void __user *to,
-	const void *from, unsigned long n);
-extern unsigned long __must_check __asm_copy_from_user(void *to,
-	const void __user *from, unsigned long n);
-
-static inline unsigned long
-raw_copy_from_user(void *to, const void __user *from, unsigned long n)
-{
-	return __asm_copy_from_user(to, from, n);
-}
-
-static inline unsigned long
-raw_copy_to_user(void __user *to, const void *from, unsigned long n)
-{
-	return __asm_copy_to_user(to, from, n);
-}
-
 extern long strncpy_from_user(char *dest, const char __user *src, long count);
 
 extern long __must_check strlen_user(const char __user *str);

arch/riscv/kernel/smp.c

@@ -96,7 +96,7 @@ static void send_ipi_mask(const struct cpumask *mask, enum ipi_message_type op)
 	if (IS_ENABLED(CONFIG_RISCV_SBI))
 		sbi_send_ipi(cpumask_bits(&hartid_mask));
 	else
-		clint_send_ipi_mask(&hartid_mask);
+		clint_send_ipi_mask(mask);
 }
 
 static void send_ipi_single(int cpu, enum ipi_message_type op)

arch/riscv/lib/Makefile

@@ -2,5 +2,5 @@
 lib-y			+= delay.o
 lib-y			+= memcpy.o
 lib-y			+= memset.o
-lib-$(CONFIG_MMU)	+= uaccess.o
+lib-y			+= uaccess.o
 lib-$(CONFIG_64BIT)	+= tishift.o