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Type: Task
Resolution: Fixed
Priority: P4
Fix Version/s: 22
Affects Version/s: None
Component/s: hotspot
Labels:

Subcomponent:
runtime
Resolved In Build:
b17
CPU:

riscv
OS:

linux

Issue	Fix Version	Assignee	Priority	Status	Resolution	Resolved In Build
JDK-8317488	21.0.2	Ludovic Henry	P4	Resolved	Fixed	b02
JDK-8319892	17.0.10	Robbin Ehn	P4	Resolved	Fixed	b03

Some dev boards only support RVV version 0.7, while the OpenJDK only supports RVV version 1.0. These two versions are not compatible with each other. Given the V bit is set through HWCAP on some custom kernels, regardless of the version, it can lead to generating V instructions on boards that don't support RVV version 1.0 (ex: Sipeed LicheePi or VisionFive 2), leading to a SIGILL.

That is an acceptable workaround as only Linux Kernel v6.5+ supports V, and that version already support hwprobe anyway

backported by

JDK-8317488 RISC-V: Disable detection of V through HWCAP

Resolved

JDK-8319892 RISC-V: Disable detection of V through HWCAP

Resolved

relates to

JDK-8309258 RISC-V: Add riscv_hwprobe syscall

Resolved

JDK-8333245 RISC-V: UseRVV option can't be enabled after JDK-8316859

Open

links to

Commit openjdk/jdk17u-dev/b5065594

Commit openjdk/jdk21u/69af26c4

Commit openjdk/jdk/311c7461

Review openjdk/jdk17u-dev/1942

Review openjdk/jdk21u/203

Review openjdk/jdk/15898

Review openjdk/riscv-port-jdk11u/20

(6 links to)

Assignee:: Ludovic Henry
Reporter:: Ludovic Henry
Votes:: 0 Vote for this issue
Watchers:: 5 Start watching this issue

Created:: 2023-09-25 01:01
Updated:: 2024-05-30 01:58
Resolved:: 2023-09-25 05:23

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