diff options
Diffstat (limited to 'gitlab/issues_text/target_riscv/host_missing/accel_missing/1793')
| -rw-r--r-- | gitlab/issues_text/target_riscv/host_missing/accel_missing/1793 | 35 |
1 files changed, 0 insertions, 35 deletions
diff --git a/gitlab/issues_text/target_riscv/host_missing/accel_missing/1793 b/gitlab/issues_text/target_riscv/host_missing/accel_missing/1793 deleted file mode 100644 index ff880bfa1..000000000 --- a/gitlab/issues_text/target_riscv/host_missing/accel_missing/1793 +++ /dev/null @@ -1,35 +0,0 @@ -getauxval(AT_HWCAP) returns different value under qemu-system-riscv64 and qemu-riscv64 -Description of problem: -I have a test program that checks for the presence of the RISC-V Vector extension (RVV) via getauxval(). - -```c -#include <sys/auxv.h> -#include <stdio.h> - -#define ISA_V_HWCAP (1 << ('v' - 'a')) - -void main() { - unsigned long hw_cap = getauxval(AT_HWCAP); - printf("RVV %s\n", hw_cap & ISA_V_HWCAP ? "detected" : "not found"); -} -``` - -When run inside `qemu-system-riscv64` with a 6.5-rc3 kernel where `CONFIG_RISCV_ISA_V=y` and `CONFIG_RISCV_ISA_V_DEFAULT_ENABLE=y` it correctly shows: - -``` -$ ./hwcap -RVV detected -``` - -However when executed with `qemu-riscv64` it does not return the V bit set: - -``` -$ qemu-riscv64 hwcap -RVV not found -``` -Steps to reproduce: -1. Boot 6.5-rc3 kernel with `CONFIG_RISCV_ISA_V=y` and `CONFIG_RISCV_ISA_V_DEFAULT_ENABLE=y` -2. In guest run test program hwcap (source above) -3. On host run `qemu-riscv64 hwcap` -Additional information: - |