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Last Minute RISC-V Patches for 5.6

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Sorry for the last minute patches, but a few things fell through the cracks
 recently.  I was on the fence about sending a late PR 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.
 
 This passes my standard "boot in QEMU" test.
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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
This commit is contained in:
Linus Torvalds 2020-03-27 11:06:10 -07:00
commit 823846c310
9 changed files with 95 additions and 78 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/riscv/Kconfig
View File

@ -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

14
arch/riscv/Kconfig.socs
View File

@ -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

16
arch/riscv/configs/defconfig
View File

@ -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

16
arch/riscv/configs/rv32_defconfig
View File

@ -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

8
arch/riscv/include/asm/clint.h
View File

@ -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)

78
arch/riscv/include/asm/pgtable.h
View File

@ -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.

36
arch/riscv/include/asm/uaccess.h
View File

@ -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);

2
arch/riscv/kernel/smp.c
View File

@ -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)

2
arch/riscv/lib/Makefile
View File

@ -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