In riscv, a page table entry is leaf when any bit of read, write,
or execute bit is set. So add a macro:_PAGE_LEAF instead of
(_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC), which is frequently used
to determine if it is a leaf page. This make code easier to read,
without any functional change.

Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

In the definition in Documentation/vm/arch_pgtable_helpers.rst,
pmd_bad() means test a non-table mapped PMD, so it should also
return true when it is a leaf page.

Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

Add a parameter: stride for __sbi_tlb_flush_range(),
represent the page stride between the address of start and end.
Normally, the stride is PAGE_SIZE, and when flush huge page
address, the stride can be the huge page size such as:PMD_SIZE,
then it only need to flush one tlb entry if the address range
within PMD_SIZE.

Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

Bring Transparent HugePage support to riscv. A
transparent huge page is always represented as a pmd.

Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

HAVE_MOVE_PUD enables remapping pages at the PUD level if both the source
and destination addresses are PUD-aligned.
HAVE_MOVE_PMD does similar speedup on the PMD level.

With HAVE_MOVE_PUD enabled, there is about a 143x improvement on qemu
With HAVE_MOVE_PMD enabled, there is about a 5x improvement on qemu

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

The empty_zero_page sits at .bss..page_aligned section, so will be
cleared to zero during clearing bss, we don't need to clear it again.

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

Enable the PCI resource mapping on RISC-V using the generic framework.
This allows userspace applications to mmap PCI resources using
/sys/devices/pci*/*/resource* interface.
The mmap has been tested with Intel x520-DA2 NIC card on a HiFive
Unmatched board (SiFive FU740 SoC).

Signed-off-by: Stanislaw Kardach <kda@semihalf.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

Make setup_bootmem() static.

Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

The _sdata/_edata is already in sections.h, drop redundant
declaration.

Also move _xiprom/_exiprom declarations at the beginning of
the file, cleanup one CONFIG_XIP_KERNEL.

Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

Directly passing the cpu to flush_icache_deferred() rather than calling
smp_processor_id() again.

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
[Palmer: drop the QEMU performance numbers, and update the comment]
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

The has_fpu check sits at hot code path: switch_to(). Currently, has_fpu
is a bool variable if FPU=y, switch_to() checks it each time, we can
optimize out this check by turning the has_fpu into a static key.

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

Inspired by commit ba090f9 ("arm64: kprobes: Remove redundant
kprobe_step_ctx"), the ss_pending and match_addr of kprobe_step_ctx
are redundant because those can be replaced by KPROBE_HIT_SS and
&cur_kprobe->ainsn.api.insn[0] + GET_INSN_LENGTH(cur->opcode)
respectively.

Remove the kprobe_step_ctx to simplify the code.

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

These functions are not needed after booting, so mark them as __init
to move them to the __init section.

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

Consolidate the following items in init.c

Staticize global vars as much as possible;
Add __initdata mark if the global var isn't needed after init
Add __init mark if the func isn't needed after init
Add __ro_after_init if the global var is read only after init

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

Fix a Kconfig warning and many build errors:

WARNING: unmet direct dependencies detected for COMPACTION
  Depends on [n]: MMU [=n]
  Selected by [y]:
  - TRANSPARENT_HUGEPAGE [=y] && HAVE_ARCH_TRANSPARENT_HUGEPAGE [=y]

and the subseqent thousands of build errors and warnings.

Fixes: e88b333 ("riscv: mm: add THP support on 64-bit")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

We map kernel pages into all addresses spages, so they can be marked as
global.  This allows hardware to avoid flushing the kernel mappings when
moving between address spaces.

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
[Palmer: commit text]
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

Correct the order of the descriptions for the "interrupts" property to
match the order of the "interrupt-names" property.

Fixes: 68989fe ("dt-bindings: usb: Convert cdns-usb3.txt to YAML schema")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

As of commit 4cdc2ec ("mmc: dw_mmc: move rockchip related code
to a separate file"), dw_mmc-pltfm.c no longer uses the clock API.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

Add vendor prefix for StarFive Technology Co. Ltd [1]. StarFive was
formed in 2018 and has now produced their first SoC, the JH7100, which
contains 64-bit RISC-V cores [2]. It used in the BeagleV Starlight [3].

[1] https://starfivetech.com/site/company
[2] https://github.com/beagleboard/beaglev-starlight
[3] https://github.com/starfive-tech/beaglev_doc

Signed-off-by: Drew Fustini <drew@beagleboard.org>

Add preliminary Device Tree bindings for the StarFive JH7100 Clock
Generator.

To be verified against documentation when it becomes available.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

…nitions

Add all clock outputs for the StarFive JH7100 Clock Generator, based on
the list of fixed-frequency clocks defined in jh7100.dtsi.

To be verified against documentation when it becomes available.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

Add a preliminary driver for the StarFive JH7100 Clock Generator.
For now, all clocks are implemented as fixed-factor clocks relative to
osc0, based on the list of fixed-frequency clocks defined in
jh7100.dtsi.

To be updated when the documentation becomes available.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

Add bindings for the GPIO controller in the StarFive JH7100 SoC [1].

[1] https://github.com/starfive-tech/beaglev_doc

Signed-off-by: Drew Fustini <drew@beagleboard.org>

This SoC is used on the BeagleV Starlight JH7100 board [1].

[1] https://github.com/beagleboard/beaglev-starlight

Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>
Signed-off-by: Drew Fustini <drew@beagleboard.org>

The first DMAC instance in the StarFive JH7100 SoC supports 16 DMA
channels.

FIXME Given there are more changes to the driver than just increasing
      DMAC_MAX_CHANNELS, we probably need a new compatible value, too.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

Add bindings for the temperature sensor on the Starfive JH7100 SoC.

Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>

Register definitions based on sfctemp driver in the StarFive
5.10 kernel by Samin Guo <samin.guo@starfivetech.com>.

Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>

This makes it easier to find out which driver passes a wrong address
range.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

Clear CNTR of PWM after setting period & duty_cycle

Descriptor management was simplified with commit:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ef6fb2d6f1abd56cc067c694253ea362159b5ac3

Code added to dw-axi-dmac-platform driver due to VIC7100 Cache Coherency
issues needed follow those changes.

Signed-off-by: Michael Scott <mike@foundries.io>

…ive VIC7100

[FIXME] why we can not do it in U-boot?

[geert: Rebase to v5.13-rc1]

Signed-off-by: Matteo Croce <mcroce@microsoft.com>

Note: including uSDK v0.9->v1.0 patch

[geert: Rebase to v5.13-rc1]
Warnings fixed by Matteo.

Signed-off-by: Matteo Croce <mcroce@microsoft.com>

drivers/usb/cdns3/
drivers/usb/core/
drivers/usb/host/
include/linux/usb.h

Geert: Rebase to v5.13-rc1
Stafford: Don't flush NULL values

Signed-off-by: Stafford Horne <shorne@gmail.com>

1, add ov5640&sc2235 drivers, update stf_isp
2, add MIPI/CSI/DSI drivers for VIC7100

… drivers

Fix sf_fb_map_video_memory in starfive_fb.c

Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>

Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>

Signed-off-by: Stephen L Arnold <nerdboy@gentoo.org>

…_EMULATION

riscv64-linux-gnu-ld: drivers/video/fbdev/starfive/tda998x.o: in function `.L0 ':
tda998x.c:(.text+0x51c): undefined reference to `drm_encoder_cleanup'
riscv64-linux-gnu-ld: tda998x.c:(.text+0x534): undefined reference to `drm_encoder_cleanup'
riscv64-linux-gnu-ld: drivers/video/fbdev/starfive/tda998x.o: in function `.L75':
tda998x.c:(.text+0x564): undefined reference to `drm_of_find_possible_crtcs'
riscv64-linux-gnu-ld: drivers/video/fbdev/starfive/tda998x.o: in function `tda998x_encoder_destroy':
tda998x.c:(.text+0x58a): undefined reference to `drm_encoder_init'
riscv64-linux-gnu-ld: drivers/video/fbdev/starfive/tda998x.o: in function `tda998x_bind':
tda998x.c:(.text+0x5b2): undefined reference to `drm_bridge_attach'
riscv64-linux-gnu-ld: tda998x.c:(.text+0x5c0): undefined reference to `drm_encoder_cleanup'
riscv64-linux-gnu-ld: drivers/video/fbdev/starfive/tda998x.o: in function `.L0 ':
tda998x.c:(.text+0x692): undefined reference to `drm_bridge_remove'
riscv64-linux-gnu-ld: drivers/video/fbdev/starfive/tda998x.o: in function `.L124':
tda998x.c:(.text+0x904): undefined reference to `hdmi_infoframe_pack'
riscv64-linux-gnu-ld: drivers/video/fbdev/starfive/tda998x.o: in function `.L135':
tda998x.c:(.text+0x9e8): undefined reference to `drm_connector_cleanup'
riscv64-linux-gnu-ld: drivers/video/fbdev/starfive/tda998x.o: in function `.L0 ':
tda998x.c:(.text+0xa00): undefined reference to `drm_connector_cleanup'
riscv64-linux-gnu-ld: drivers/video/fbdev/starfive/tda998x.o: in function `.L143':
tda998x.c:(.text+0xa56): undefined reference to `drm_connector_init'
riscv64-linux-gnu-ld: tda998x.c:(.text+0xa66): undefined reference to `drm_connector_attach_encoder'
riscv64-linux-gnu-ld: drivers/video/fbdev/starfive/tda998x.o: in function `tda998x_bridge_detach':
tda998x.c:(.text+0xa8a): undefined reference to `__drm_err'
riscv64-linux-gnu-ld: drivers/video/fbdev/starfive/tda998x.o: in function `.L189':
tda998x.c:(.text+0xd16): undefined reference to `drm_do_get_edid'
riscv64-linux-gnu-ld: drivers/video/fbdev/starfive/tda998x.o: in function `.L0 ':
tda998x.c:(.text+0xd34): undefined reference to `drm_connector_update_edid_property'
riscv64-linux-gnu-ld: tda998x.c:(.text+0xd4e): undefined reference to `drm_add_edid_modes'
riscv64-linux-gnu-ld: drivers/video/fbdev/starfive/tda998x.o: in function `.L165':
tda998x.c:(.text+0xd5a): undefined reference to `drm_detect_monitor_audio'
riscv64-linux-gnu-ld: drivers/video/fbdev/starfive/tda998x.o: in function `.L0 ':
tda998x.c:(.text+0xfb0): undefined reference to `__drm_dbg'
riscv64-linux-gnu-ld: tda998x.c:(.text+0x108a): undefined reference to `drm_kms_helper_hotplug_event'
riscv64-linux-gnu-ld: drivers/video/fbdev/starfive/tda998x.o: in function `.L283':
tda998x.c:(.text+0x1844): undefined reference to `drm_hdmi_avi_infoframe_from_display_mode'
riscv64-linux-gnu-ld: drivers/video/fbdev/starfive/tda998x.o: in function `.L361':
tda998x.c:(.text+0x2078): undefined reference to `drm_bridge_add'
riscv64-linux-gnu-ld: drivers/video/fbdev/starfive/tda998x.o: in function `.LANCHOR0':
tda998x.c:(.rodata+0x90): undefined reference to `drm_helper_connector_dpms'
riscv64-linux-gnu-ld: tda998x.c:(.rodata+0x98): undefined reference to `drm_atomic_helper_connector_reset'
riscv64-linux-gnu-ld: tda998x.c:(.rodata+0xb0): undefined reference to `drm_helper_probe_single_connector_modes'
riscv64-linux-gnu-ld: tda998x.c:(.rodata+0xd8): undefined reference to `drm_atomic_helper_connector_duplicate_state'
riscv64-linux-gnu-ld: tda998x.c:(.rodata+0xe0): undefined reference to `drm_atomic_helper_connector_destroy_state'

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

…flict

    starfive,vpp-lcdc 12000000.sfivefb: can't request region for resource [mem 0xfb000000-0xfcffffff]
    starfive,vpp-lcdc 12000000.sfivefb: Fail to allocate video RAM
    starfive,vpp-lcdc 12000000.sfivefb: starfive fb init fail
    starfive,vpp-lcdc 12000000.sfivefb: fb info init FAIL
    starfive,vpp-lcdc: probe of 12000000.sfivefb failed with error -16

devm_ioremap_resource() calls devm_request_mem_region(), which fails as
the reserved memory for the frame buffer is already present in the
resource list, cfr. /proc/iomem:

    fb000000-fcffffff : Reserved

Fix this by mapping the frame buffer memory using devm_ioremap().

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

This IP is also used on the Starfive JH7100 riscv64 SoC and presumably
also the upcoming JH7110 SoC.

Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>

The BeagleV Starlight v0.9 board doesn't have the IRQB line from the
pmic routed to the SoC, so this hack is needed to allow the driver
to be loaded without it. See
beagleboard/beaglev-starlight#14

Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>

Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>

Based on the device tree in https://github.com/starfive-tech/u-boot/
with contributions from:
yanhong.wang <yanhong.wang@starfivetech.com>
Huan.Feng <huan.feng@starfivetech.com>
ke.zhu <ke.zhu@starfivetech.com>
yiming.li <yiming.li@starfivetech.com>
jack.zhu <jack.zhu@starfivetech.com>
Samin Guo <samin.guo@starfivetech.com>
Chenjieqin <Jessica.Chen@starfivetech.com>
bo.li <bo.li@starfivetech.com>

Rearranged, cleanups, fixes and TPS65086 added by Emil.
Cleanups, fixes and LED added by Geert.
Cleanups and GPIO fixes from Drew.
Thermal zone added by Stephen.

Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Stephen L Arnold <nerdboy@gentoo.org>
Signed-off-by: Drew Fustini <drew@beagleboard.org>

For convenience this also adds a small starlight_defconfig and the
firmware needed for the brcmfmac driver along with the signed regulatory
database.

The firmware is from the linux-firmware repo and the regulatory database
from the wireless-regdb Fedora package.

Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Drew Fustini <drew@beagleboard.org>

This reverts commit 3cdd633.