John Baldwin
4f876cec30
Similar to arm64, riscv's pcb embeds a copy of the floating point registers and is too large to store directly in struct mdthread as is done on amd64. Instead, use a separate UMA zone for pcbs. riscv's floating point state is not as large as arm64's, so its pcb is also somewhat smaller and a single 4k page can hold 6 pcbs. Reviewed by: kib, jrtc27 Sponsored by: AFRL, DARPA Pull Request: https://ron-dev.freebsd.org/FreeBSD/src/pulls/23