On 24 April 2018 at 17:40, Palmer Dabbelt <pal...@sifive.com> wrote: > On Tue, 24 Apr 2018 09:03:29 PDT (-0700), alex.ben...@linaro.org wrote: >> >> As support was merged into the mainline kernel at 4.15 it is unlikely >> 3.8.0 is the correct value. Indeed when I testing binaries created by >> the current Debian SID compiler the tests failed with: >> >> FATAL: kernel too old >> >> Signed-off-by: Alex Bennée <alex.ben...@linaro.org> >> --- >> linux-user/riscv/target_syscall.h | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/linux-user/riscv/target_syscall.h >> b/linux-user/riscv/target_syscall.h >> index d4e109a27f..ee81d8bc88 100644 >> --- a/linux-user/riscv/target_syscall.h >> +++ b/linux-user/riscv/target_syscall.h >> @@ -45,7 +45,7 @@ struct target_pt_regs { >> #else >> #define UNAME_MACHINE "riscv64" >> #endif >> -#define UNAME_MINIMUM_RELEASE "3.8.0" >> +#define UNAME_MINIMUM_RELEASE "4.15.0" >> >> #define TARGET_MINSIGSTKSZ 2048 >> #define TARGET_MLOCKALL_MCL_CURRENT 1 > > > If I understand this correctly, this will make host kernels older than > 4.15.0 look like 4.15.0 when a program running in user-mode emulation on a > RISC-V system?
Yes. Typically you want to set this to whatever glibc has baked in as its arch_minimum_kernel, which in this case does seem to be 4.15.0: https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/unix/sysv/linux/riscv/configure.ac;h=4fae013ec91451370a6d14b15b7e6d37fcd669af;hb=HEAD thanks -- PMM