Merge tag 'riscv-for-linus-5.19-mw2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

Pull more RISC-V updates from Palmer Dabbelt:
 "This is mostly some DT updates, but also a handful of cleanups and
  some fixes. The most user-visible of those are:

   - A device tree for the Sundance Polarberry, along with a handful of
     fixes and clenups to the PolarFire SOC device trees and bindings.

   - The memfd_secret syscall number is now visible to userspace,

   - Some improvements to the vm layout dump, which really should have
     followed shortly after the sv48 patches but I missed"

* tag 'riscv-for-linus-5.19-mw2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: Move alternative length validation into subsection
  riscv: mm: init: make pt_ops_set_[early|late|fixmap] static
  riscv: move errata/ and kvm/ builds to arch/riscv/Kbuild
  RISC-V: Mark IORESOURCE_EXCLUSIVE for reserved mem instead of IORESOURCE_BUSY
  riscv: Wire up memfd_secret in UAPI header
  riscv: Fix irq_work when SMP is disabled
  riscv: Improve virtual kernel memory layout dump
  riscv: Initialize thread pointer before calling C functions
  Documentation: riscv: Add sv48 description to VM layout
  RISC-V: Only default to spinwait on SBI-0.1 and M-mode
  riscv: dts: icicle: sort nodes alphabetically
  riscv: microchip: icicle: readability fixes
  riscv: dts: microchip: add the sundance polarberry
  dt-bindings: riscv: microchip: add polarberry compatible string
  dt-bindings: vendor-prefixes: add Sundance DSP
  riscv: dts: microchip: make the fabric dtsi board specific
  dt-bindings: riscv: microchip: document icicle reference design
  riscv: dts: microchip: remove soc vendor from filenames
  riscv: dts: microchip: move sysctrlr out of soc bus
  riscv: dts: microchip: remove icicle memory clocks

3 files changed, 40 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/riscv/microchip.yaml b/Documentation/devicetree/bindings/riscv/microchip.yaml
index 3f981e897126..1aa7336a9672 100644
--- a/Documentation/devicetree/bindings/riscv/microchip.yaml
+++ b/Documentation/devicetree/bindings/riscv/microchip.yaml
@@ -20,6 +20,8 @@ properties:
     items:
       - enum:
           - microchip,mpfs-icicle-kit
+          - microchip,mpfs-icicle-reference-rtlv2203
+          - sundance,polarberry
       - const: microchip,mpfs
 
 additionalProperties: true
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
index 495a01ced97e..6bb20b4554d7 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
+++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
@@ -1207,6 +1207,8 @@ patternProperties:
     description: Summit microelectronics
   "^sunchip,.*":
     description: Shenzhen Sunchip Technology Co., Ltd
+  "^sundance,.*":
+    description: Sundance DSP Inc.
   "^sunplus,.*":
     description: Sunplus Technology Co., Ltd.
   "^SUNW,.*":
diff --git a/Documentation/riscv/vm-layout.rst b/Documentation/riscv/vm-layout.rst
index 1bd687b97104..5b36e45fef60 100644
--- a/Documentation/riscv/vm-layout.rst
+++ b/Documentation/riscv/vm-layout.rst
@@ -61,3 +61,39 @@ RISC-V Linux Kernel SV39
    ffffffff00000000 |   -4    GB | ffffffff7fffffff |    2 GB | modules, BPF
    ffffffff80000000 |   -2    GB | ffffffffffffffff |    2 GB | kernel
   __________________|____________|__________________|_________|____________________________________________________________
+
+
+RISC-V Linux Kernel SV48
+------------------------
+
+::
+
+ ========================================================================================================================
+      Start addr    |   Offset   |     End addr     |  Size   | VM area description
+ ========================================================================================================================
+                    |            |                  |         |
+   0000000000000000 |    0       | 00007fffffffffff |  128 TB | user-space virtual memory, different per mm
+  __________________|____________|__________________|_________|___________________________________________________________
+                    |            |                  |         |
+   0000800000000000 | +128    TB | ffff7fffffffffff | ~16M TB | ... huge, almost 64 bits wide hole of non-canonical
+                    |            |                  |         | virtual memory addresses up to the -128 TB
+                    |            |                  |         | starting offset of kernel mappings.
+  __________________|____________|__________________|_________|___________________________________________________________
+                                                              |
+                                                              | Kernel-space virtual memory, shared between all processes:
+  ____________________________________________________________|___________________________________________________________
+                    |            |                  |         |
+   ffff8d7ffee00000 |  -114.5 TB | ffff8d7ffeffffff |    2 MB | fixmap
+   ffff8d7fff000000 |  -114.5 TB | ffff8d7fffffffff |   16 MB | PCI io
+   ffff8d8000000000 |  -114.5 TB | ffff8f7fffffffff |    2 TB | vmemmap
+   ffff8f8000000000 |  -112.5 TB | ffffaf7fffffffff |   32 TB | vmalloc/ioremap space
+   ffffaf8000000000 |  -80.5  TB | ffffef7fffffffff |   64 TB | direct mapping of all physical memory
+   ffffef8000000000 |  -16.5  TB | fffffffeffffffff | 16.5 TB | kasan
+  __________________|____________|__________________|_________|____________________________________________________________
+                                                              |
+                                                              | Identical layout to the 39-bit one from here on:
+  ____________________________________________________________|____________________________________________________________
+                    |            |                  |         |
+   ffffffff00000000 |   -4    GB | ffffffff7fffffff |    2 GB | modules, BPF
+   ffffffff80000000 |   -2    GB | ffffffffffffffff |    2 GB | kernel
+  __________________|____________|__________________|_________|____________________________________________________________