thead.c

 1// SPDX-License-Identifier: GPL-2.0-only
 2
 3#include <asm/cpufeature.h>
 4#include <asm/vendor_extensions.h>
 5#include <asm/vendor_extensions/thead.h>
 6
 7#include <linux/array_size.h>
 8#include <linux/cpumask.h>
 9#include <linux/types.h>
10
11/* All T-Head vendor extensions supported in Linux */
12static const struct riscv_isa_ext_data riscv_isa_vendor_ext_thead[] = {
13	__RISCV_ISA_EXT_DATA(xtheadvector, RISCV_ISA_VENDOR_EXT_XTHEADVECTOR),
14};
15
16struct riscv_isa_vendor_ext_data_list riscv_isa_vendor_ext_list_thead = {
17	.ext_data_count = ARRAY_SIZE(riscv_isa_vendor_ext_thead),
18	.ext_data = riscv_isa_vendor_ext_thead,
19};
20
21void disable_xtheadvector(void)
22{
23	int cpu;
24
25	for_each_possible_cpu(cpu)
26		clear_bit(RISCV_ISA_VENDOR_EXT_XTHEADVECTOR, riscv_isa_vendor_ext_list_thead.per_hart_isa_bitmap[cpu].isa);
27
28	clear_bit(RISCV_ISA_VENDOR_EXT_XTHEADVECTOR, riscv_isa_vendor_ext_list_thead.all_harts_isa_bitmap.isa);
29}