diff options
Diffstat (limited to 'machine/minit.c')
| -rw-r--r-- | machine/minit.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/machine/minit.c b/machine/minit.c index 8c98e2b..a1befd1 100644 --- a/machine/minit.c +++ b/machine/minit.c @@ -23,13 +23,17 @@ void* kernel_end; static void mstatus_init() { + uintptr_t mstatus = 0; + // Enable FPU if (supports_extension('F')) - write_csr(mstatus, MSTATUS_FS); + mstatus |= MSTATUS_FS; // Enable vector extension if (supports_extension('V')) - write_csr(mstatus, MSTATUS_VS); + mstatus |= MSTATUS_VS; + + write_csr(mstatus, mstatus); // Enable user/supervisor use of perf counters if (supports_extension('S')) |