[GIT PULL] RISC-V Patches for the 6.3 Merge Window, Part 1
Palmer Dabbelt
palmer at rivosinc.com
Fri Feb 24 10:32:00 PST 2023
The following changes since commit c1d6105869464635d8a2bcf87a43c05f4c0cfca4:
riscv: Move call to init_cpu_topology() to later initialization stage (2023-01-25 07:20:00 -0800)
are available in the Git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git tags/riscv-for-linus-6.3-mw1
for you to fetch changes up to eb9be8310c58c166f9fae3b71c0ad9d6741b4897:
RISC-V: add a spin_shadow_stack declaration (2023-02-22 06:48:30 -0800)
----------------------------------------------------------------
RISC-V Patches for the 6.3 Merge Window, Part 1
There's a bunch of fixes/cleanups throughout the tree as usual, but we
also have a handful of new features.
* Various improvements to the extension detection and alternative
patching infrastructure.
* Zbb-optimized string routines.
* Support for cpu-capacity in the RISC-V DT bindings.
* Zicbom no longer depends on toolchain support.
* Some performance and code size improvements to ftrace.
* Support for ARCH_WANT_LD_ORPHAN_WARN.
* Oops now contain the faulting instruction.
----------------------------------------------------------------
This is passing my tests, but there's already some fixes on the list so
there'll almost certainly be a part 2. There are also some patches with
dependencies that might still be candidates for the merge window, depending on
how things go.
I have a somewhat ugly merge conflict this time between my fixes and for-next,
as there were some fixes to the extension handling code at the same time it was
being refactored. Here's my resolution, if that helps any -- essentially we're
just moving away from the enums in hwcap so we can use these in assembly, and
have inlined the check in cpu_relax():
diff --cc arch/riscv/include/asm/hwcap.h
index 8f3994a7f0ca,64ad1937e714..000000000000
--- a/arch/riscv/include/asm/hwcap.h
+++ b/arch/riscv/include/asm/hwcap.h
@@@ -24,36 -37,43 +24,32 @@@
#define RISCV_ISA_EXT_u ('u' - 'a')
/*
- * Increse this to higher value as kernel support more ISA extensions.
+ * These macros represent the logical IDs of each multi-letter RISC-V ISA
+ * extension and are used in the ISA bitmap. The logical IDs start from
+ * RISCV_ISA_EXT_BASE, which allows the 0-25 range to be reserved for single
+ * letter extensions. The maximum, RISCV_ISA_EXT_MAX, is defined in order
+ * to allocate the bitmap and may be increased when necessary.
+ *
+ * New extensions should just be added to the bottom, rather than added
+ * alphabetically, in order to avoid unnecessary shuffling.
*/
-#define RISCV_ISA_EXT_MAX 64
-#define RISCV_ISA_EXT_NAME_LEN_MAX 32
+#define RISCV_ISA_EXT_BASE 26
-/* The base ID for multi-letter ISA extensions */
-#define RISCV_ISA_EXT_BASE 26
+#define RISCV_ISA_EXT_SSCOFPMF 26
+#define RISCV_ISA_EXT_SSTC 27
+#define RISCV_ISA_EXT_SVINVAL 28
+#define RISCV_ISA_EXT_SVPBMT 29
+#define RISCV_ISA_EXT_ZBB 30
+#define RISCV_ISA_EXT_ZICBOM 31
+#define RISCV_ISA_EXT_ZIHINTPAUSE 32
-/*
- * This enum represent the logical ID for each multi-letter RISC-V ISA extension.
- * The logical ID should start from RISCV_ISA_EXT_BASE and must not exceed
- * RISCV_ISA_EXT_MAX. 0-25 range is reserved for single letter
- * extensions while all the multi-letter extensions should define the next
- * available logical extension id.
- */
-enum riscv_isa_ext_id {
- RISCV_ISA_EXT_SSCOFPMF = RISCV_ISA_EXT_BASE,
- RISCV_ISA_EXT_SVPBMT,
- RISCV_ISA_EXT_ZICBOM,
- RISCV_ISA_EXT_ZIHINTPAUSE,
- RISCV_ISA_EXT_SSTC,
- RISCV_ISA_EXT_SVINVAL,
- RISCV_ISA_EXT_ID_MAX
-};
-static_assert(RISCV_ISA_EXT_ID_MAX <= RISCV_ISA_EXT_MAX);
+#define RISCV_ISA_EXT_MAX 64
+#define RISCV_ISA_EXT_NAME_LEN_MAX 32
-/*
- * This enum represents the logical ID for each RISC-V ISA extension static
- * keys. We can use static key to optimize code path if some ISA extensions
- * are available.
- */
-enum riscv_isa_ext_key {
- RISCV_ISA_EXT_KEY_FPU, /* For 'F' and 'D' */
- RISCV_ISA_EXT_KEY_SVINVAL,
- RISCV_ISA_EXT_KEY_MAX,
-};
+#ifndef __ASSEMBLY__
+
+#include <linux/jump_label.h>
- enum {
- CAP_HWCAP = 1,
- };
-
struct riscv_isa_ext_data {
/* Name of the extension displayed to userspace via /proc/cpuinfo */
char uprop[RISCV_ISA_EXT_NAME_LEN_MAX];
diff --cc arch/riscv/include/asm/vdso/processor.h
index edf0e25e43d1,14f5d27783b8..000000000000
--- a/arch/riscv/include/asm/vdso/processor.h
+++ b/arch/riscv/include/asm/vdso/processor.h
----------------------------------------------------------------
Andrew Jones (4):
riscv: module: Add ADD16 and SUB16 rela types
riscv: KVM: Switch has_svinval() to riscv_has_extension_unlikely()
RISC-V: insn-def: Add I-type insn-def
riscv: hwcap: Don't alphabetize ISA extension IDs
Andy Chiu (2):
riscv: ftrace: Fixup panic by disabling preemption
riscv: jump_label: Fixup unaligned arch_static_branch function
Björn Töpel (3):
riscv: Add instruction dump to RISC-V splats
scripts/decodecode: Add support for RISC-V
riscv, mm: Perform BPF exhandler fixup on page fault
Conor Dooley (12):
RISC-V: fix incorrect type of ARCH_CANAAN_K210_DTB_SOURCE
RISC-V: clarify ISA string ordering rules in cpu.c
RISC-V: resort all extensions in consistent orders
Documentation: riscv: add a section about ISA string ordering in /proc/cpuinfo
Documentation: riscv: fix insufficient list item indent
RISC-V: re-order Kconfig selects alphanumerically
dt-bindings: arm: move cpu-capacity to a shared loation
dt-bindings: riscv: add a capacity-dmips-mhz cpu property
RISC-V: replace cbom instructions with an insn-def
RISC-V: remove toolchain version checks for Zicbom
RISC-V: take text_mutex during alternative patching
RISC-V: add a spin_shadow_stack declaration
Geert Uytterhoeven (1):
RISC-V: Kconfig: Remove trailing whitespace
Guo Ren (4):
riscv: pgtable: Fixup comment for KERN_VIRT_SIZE
riscv: ftrace: Remove wasted nops for !RISCV_ISA_C
riscv: ftrace: Reduce the detour code size to half
riscv: mm: hugetlb: Enable ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
Heiko Stuebner (17):
RISC-V: fix funct4 definition for c.jalr in parse_asm.h
RISC-V: add prefix to all constants/macros in parse_asm.h
RISC-V: detach funct-values from their offset
RISC-V: add ebreak instructions to definitions
RISC-V: add auipc elements to parse_asm header
RISC-V: Move riscv_insn_is_* macros into a common header
RISC-V: rename parse_asm.h to insn.h
RISC-V: kprobes: use central defined funct3 constants
RISC-V: add U-type imm parsing to insn.h header
RISC-V: add rd reg parsing to insn.h header
RISC-V: add helpers for handling immediates in U-type and I-type pairs
RISC-V: fix auipc-jalr addresses in patched alternatives
RISC-V: Fix do_notify_resume / do_work_pending prototype
RISC-V: add infrastructure to allow different str* implementations
RISC-V: add zbb support to string functions
RISC-V: move some stray __RISCV_INSN_FUNCS definitions from kprobes
RISC-V: fix ordering of Zbb extension
Jisheng Zhang (18):
riscv: fix jal offsets in patched alternatives
riscv: move riscv_noncoherent_supported() out of ZICBOM probe
riscv: cpufeature: detect RISCV_ALTERNATIVES_EARLY_BOOT earlier
riscv: hwcap: make ISA extension ids can be used in asm
riscv: cpufeature: extend riscv_cpufeature_patch_func to all ISA extensions
riscv: introduce riscv_has_extension_[un]likely()
riscv: fpu: switch has_fpu() to riscv_has_extension_likely()
riscv: module: move find_section to module.h
riscv: switch to relative alternative entries
riscv: alternative: patch alternatives in the vDSO
riscv: cpu_relax: switch to riscv_has_extension_likely()
riscv: remove riscv_isa_ext_keys[] array and related usage
riscv: lds: define RUNTIME_DISCARD_EXIT
riscv: vmlinux.lds.S: explicitly catch .rela.dyn symbols
riscv: vmlinux.lds.S: explicitly catch .riscv.attributes sections
riscv: vmlinux.lds.S: explicitly catch .init.bss sections from EFI stub
riscv: select ARCH_WANT_LD_ORPHAN_WARN for !XIP_KERNEL
riscv: alternative: proceed one more instruction for auipc/jalr pair
Liao Chang (1):
riscv: Add header include guards to insn.h
Mattias Nissler (1):
riscv: Avoid enabling interrupts in die()
Palmer Dabbelt (12):
Merge tag 'soc2arch-immutable' of git://git.kernel.org/pub/scm/linux/kernel/git/conor/linux into for-next
Merge patch series "Allow calls in alternatives"
Merge patch "RISC-V: fix incorrect type of ARCH_CANAAN_K210_DTB_SOURCE"
Merge patch series "Putting some basic order on isa extension lists"
Merge patch series "Zbb string optimizations"
Merge patch series "riscv: improve boot time isa extensions handling"
Merge patch series "dt-bindings: Add a cpu-capacity property for RISC-V"
Merge patch series "Remove toolchain dependencies for Zicbom"
Merge patch series "riscv: Optimize function trace"
RISC-V: Only provide the single-letter extensions in HWCAP
Merge patch series "riscv: improve link and support ARCH_WANT_LD_ORPHAN_WARN"
Merge patch series "riscv: Dump faulting instructions in oops handler"
Samuel Holland (2):
riscv: Fix early alternative patching
riscv: Fix Zbb alternative IDs
Sergey Matyukevich (1):
riscv: mm: fix regression due to update_mmu_cache change
Documentation/devicetree/bindings/arm/cpus.yaml | 2 +-
.../bindings/{arm => cpu}/cpu-capacity.txt | 4 +-
Documentation/devicetree/bindings/riscv/cpus.yaml | 6 +
Documentation/riscv/uabi.rst | 42 +++
Documentation/scheduler/sched-capacity.rst | 2 +-
.../zh_CN/scheduler/sched-capacity.rst | 2 +-
arch/riscv/Kconfig | 78 +++--
arch/riscv/Kconfig.socs | 40 ++-
arch/riscv/Makefile | 11 +-
arch/riscv/boot/dts/Makefile | 2 +-
arch/riscv/boot/dts/canaan/Makefile | 14 +-
arch/riscv/boot/dts/microchip/Makefile | 8 +-
arch/riscv/boot/dts/sifive/Makefile | 4 +-
arch/riscv/boot/dts/starfive/Makefile | 2 +-
arch/riscv/errata/sifive/errata.c | 6 +-
arch/riscv/errata/thead/errata.c | 17 +-
arch/riscv/include/asm/alternative-macros.h | 20 +-
arch/riscv/include/asm/alternative.h | 20 +-
arch/riscv/include/asm/elf.h | 10 +-
arch/riscv/include/asm/errata_list.h | 12 +-
arch/riscv/include/asm/ftrace.h | 50 ++-
arch/riscv/include/asm/hwcap.h | 117 +++----
arch/riscv/include/asm/insn-def.h | 58 ++++
arch/riscv/include/asm/insn.h | 381 +++++++++++++++++++++
arch/riscv/include/asm/jump_label.h | 2 +
arch/riscv/include/asm/module.h | 16 +
arch/riscv/include/asm/parse_asm.h | 219 ------------
arch/riscv/include/asm/pgtable.h | 4 +-
arch/riscv/include/asm/signal.h | 2 +-
arch/riscv/include/asm/string.h | 10 +
arch/riscv/include/asm/switch_to.h | 3 +-
arch/riscv/include/asm/thread_info.h | 1 +
arch/riscv/include/asm/vdso.h | 4 +
arch/riscv/include/asm/vdso/processor.h | 2 +-
arch/riscv/kernel/alternative.c | 113 ++++++
arch/riscv/kernel/cpu.c | 54 ++-
arch/riscv/kernel/cpufeature.c | 85 ++---
arch/riscv/kernel/ftrace.c | 65 +---
arch/riscv/kernel/kgdb.c | 63 ++--
arch/riscv/kernel/mcount-dyn.S | 42 +--
arch/riscv/kernel/module.c | 31 +-
arch/riscv/kernel/probes/simulate-insn.c | 19 +-
arch/riscv/kernel/probes/simulate-insn.h | 29 +-
arch/riscv/kernel/riscv_ksyms.c | 3 +
arch/riscv/kernel/setup.c | 3 +
arch/riscv/kernel/traps.c | 30 +-
arch/riscv/kernel/vdso.c | 5 -
arch/riscv/kernel/vdso/vdso.lds.S | 7 +
arch/riscv/kernel/vmlinux.lds.S | 9 +
arch/riscv/kvm/tlb.c | 3 +-
arch/riscv/lib/Makefile | 3 +
arch/riscv/lib/strcmp.S | 121 +++++++
arch/riscv/lib/strlen.S | 133 +++++++
arch/riscv/lib/strncmp.S | 139 ++++++++
arch/riscv/mm/fault.c | 10 +-
arch/riscv/purgatory/Makefile | 13 +
scripts/decodecode | 12 +-
57 files changed, 1507 insertions(+), 656 deletions(-)
rename Documentation/devicetree/bindings/{arm => cpu}/cpu-capacity.txt (98%)
create mode 100644 arch/riscv/include/asm/insn.h
delete mode 100644 arch/riscv/include/asm/parse_asm.h
create mode 100644 arch/riscv/lib/strcmp.S
create mode 100644 arch/riscv/lib/strlen.S
create mode 100644 arch/riscv/lib/strncmp.S
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