linux.git/tools/testing/selftests/riscv, branch v6.9

RISC-V: selftests: cbo: Ensure asm operands match constraints, take 2

2024-04-26T17:21:56+00:00

Commit 0de65288d75f ("RISC-V: selftests: cbo: Ensure asm operands
match constraints") attempted to ensure MK_CBO() would always
provide to a compile-time constant when given a constant, but
cpu_to_le32() isn't necessarily going to do that. Switch to manually
shifting the bytes, when needed, to finally get this right.

Reported-by: Woodrow Shen 
Closes: https://lore.kernel.org/all/CABquHATcBTUwfLpd9sPObBgNobqQKEAZ2yxk+TWSpyO5xvpXpg@mail.gmail.com/
Fixes: a29e2a48afe3 ("RISC-V: selftests: Add CBO tests")
Fixes: 0de65288d75f ("RISC-V: selftests: cbo: Ensure asm operands match constraints")
Signed-off-by: Andrew Jones 
Link: https://lore.kernel.org/r/20240322134728.151255-2-ajones@ventanamicro.com
Signed-off-by: Palmer Dabbelt

Merge patch series "riscv: mm: Extend mappable memory up to hint address"

2024-03-15T17:17:34+00:00

Charlie Jenkins  says:

On riscv, mmap currently returns an address from the largest address
space that can fit entirely inside of the hint address. This makes it
such that the hint address is almost never returned. This patch raises
the mappable area up to and including the hint address. This allows mmap
to often return the hint address, which allows a performance improvement
over searching for a valid address as well as making the behavior more
similar to other architectures.

Note that a previous patch introduced stronger semantics compared to
other architectures for riscv mmap. On riscv, mmap will not use bits in
the upper bits of the virtual address depending on the hint address. On
other architectures, a random address is returned in the address space
requested. On all architectures the hint address will be returned if it
is available. This allows riscv applications to configure how many bits
in the virtual address should be left empty. This has the two benefits
of being able to request address spaces that are smaller than the
default and doesn't require the application to know the page table
layout of riscv.

* b4-shazam-merge:
  docs: riscv: Define behavior of mmap
  selftests: riscv: Generalize mm selftests
  riscv: mm: Use hint address in mmap if available

Link: https://lore.kernel.org/r/20240130-use_mmap_hint_address-v3-0-8a655cfa8bcb@rivosinc.com
Signed-off-by: Palmer Dabbelt

selftests: riscv: Generalize mm selftests

2024-03-14T15:46:14+00:00

The behavior of mmap on riscv is defined to not provide an address that
uses more bits than the hint address, if provided. Make the tests
reflect that.

Signed-off-by: Charlie Jenkins 
Link: https://lore.kernel.org/r/20240130-use_mmap_hint_address-v3-2-8a655cfa8bcb@rivosinc.com
Signed-off-by: Palmer Dabbelt

RISC-V: selftests: cbo: Ensure asm operands match constraints

2024-01-18T01:46:55+00:00

The 'i' constraint expects a constant operand, which fn and its
constant derivative MK_CBO(fn) are, but passing fn through a function
as a parameter and using a local variable for MK_CBO(fn) allow the
compiler to lose sight of that when no optimization is done. Use
a macro instead of a function and skip the local variable to ensure
the compiler uses constants, matching the asm constraints.

Reported-by: Yunhui Cui 
Closes: https://lore.kernel.org/all/20240117082514.42967-1-cuiyunhui@bytedance.com
Fixes: a29e2a48afe3 ("RISC-V: selftests: Add CBO tests")
Signed-off-by: Andrew Jones 
Link: https://lore.kernel.org/r/20240117130933.57514-2-ajones@ventanamicro.com
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt

Merge patch series "tools: selftests: riscv: Fix compiler warnings"

2024-01-11T16:02:55+00:00

Christoph Muellner  says:

From: Christoph Müllner 

When building the RISC-V selftests with a riscv32 compiler I ran into
a couple of compiler warnings. While riscv32 support for these tests is
questionable, the fixes are so trivial that it is probably best to simply
apply them.

Note that the missing-include patch and some format string warnings
are also relevant for riscv64.

* b4-shazam-merge:
  tools: selftests: riscv: Fix compile warnings in mm tests
  tools: selftests: riscv: Fix compile warnings in vector tests
  tools: selftests: riscv: Add missing include for vector test
  tools: selftests: riscv: Fix compile warnings in cbo
  tools: selftests: riscv: Fix compile warnings in hwprobe

Link: https://lore.kernel.org/r/20231123185821.2272504-1-christoph.muellner@vrull.eu
Signed-off-by: Palmer Dabbelt

tools: selftests: riscv: Fix compile warnings in mm tests

2024-01-11T16:02:51+00:00

When building the mm tests with a riscv32 compiler, we see a range
of shift-count-overflow errors from shifting 1UL by more than 32 bits
in do_mmaps(). Since, the relevant code is only called from code that
is gated by `__riscv_xlen == 64`, we can just apply the same gating
to do_mmaps().

Signed-off-by: Christoph Müllner 
Reviewed-by: Alexandre Ghiti 
Reviewed-by: Andrew Jones 
Link: https://lore.kernel.org/r/20231123185821.2272504-6-christoph.muellner@vrull.eu
Signed-off-by: Palmer Dabbelt

tools: selftests: riscv: Fix compile warnings in vector tests

2024-01-11T16:02:50+00:00

GCC prints a couple of format string warnings when compiling
the vector tests. Let's follow the recommendation in
Documentation/printk-formats.txt to fix these warnings.

Signed-off-by: Christoph Müllner 
Reviewed-by: Alexandre Ghiti 
Reviewed-by: Andrew Jones 
Link: https://lore.kernel.org/r/20231123185821.2272504-5-christoph.muellner@vrull.eu
Signed-off-by: Palmer Dabbelt

tools: selftests: riscv: Add missing include for vector test

2024-01-11T16:02:49+00:00

GCC raises the following warning:
  warning: 'status' may be used uninitialized
The warning comes from the fact, that the signature of waitpid() is
unknown and therefore the initialization of GCC cannot be guessed.
Let's add the relevant header to address this warning.

Signed-off-by: Christoph Müllner 
Reviewed-by: Alexandre Ghiti 
Reviewed-by: Andy Chiu 
Reviewed-by: Andrew Jones 
Link: https://lore.kernel.org/r/20231123185821.2272504-4-christoph.muellner@vrull.eu
Signed-off-by: Palmer Dabbelt

tools: selftests: riscv: Fix compile warnings in cbo

2024-01-11T16:02:48+00:00

GCC prints a couple of format string warnings when compiling
the cbo test. Let's follow the recommendation in
Documentation/printk-formats.txt to fix these warnings.

Signed-off-by: Christoph Müllner 
Reviewed-by: Alexandre Ghiti 
Reviewed-by: Andrew Jones 
Link: https://lore.kernel.org/r/20231123185821.2272504-3-christoph.muellner@vrull.eu
Signed-off-by: Palmer Dabbelt

tools: selftests: riscv: Fix compile warnings in hwprobe

2024-01-11T16:02:47+00:00

GCC prints a couple of format string warnings when compiling
the hwprobe test. Let's follow the recommendation in
Documentation/printk-formats.txt to fix these warnings.

Signed-off-by: Christoph Müllner 
Reviewed-by: Alexandre Ghiti 
Reviewed-by: Andrew Jones 
Link: https://lore.kernel.org/r/20231123185821.2272504-2-christoph.muellner@vrull.eu
Signed-off-by: Palmer Dabbelt