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riscv: skip rv{32,64} prefix when parsing extensions from isa strings

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xvanc 2023-09-13 18:57:46 -05:00 committed by mintsuki
parent cdac49ebfb
commit f4bfe1289a
1 changed files with 7 additions and 1 deletions
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8
common/sys/cpu_riscv.c
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@ -4,6 +4,7 @@
#include <lib/acpi.h>
#include <lib/misc.h>
#include <lib/print.h>
#include <sys/cpu.h>
#include <mm/pmm.h>
#include <stddef.h>
#include <stdint.h>
@ -130,6 +131,10 @@ void init_riscv(void) {
continue;
}
if (strncmp("rv64", isa_string, 4) && strncmp("rv32", isa_string, 4)) {
print("riscv: skipping hartid %u with invalid isa string: %s", hartid, isa_string);
}
struct riscv_hart *hart = ext_mem_alloc(sizeof(struct riscv_hart));
if (hart == NULL) {
panic(false, "out of memory");
@ -233,7 +238,8 @@ static bool extension_matches(const struct isa_extension *ext, const char *name)
}
bool riscv_check_isa_extension_for(size_t hartid, const char *name, size_t *maj, size_t *min) {
const char *isa_string = riscv_get_hart(hartid)->isa_string;
// Skip the `rv{32,64}` prefix so it's not parsed as extensions.
const char *isa_string = riscv_get_hart(hartid)->isa_string + 4;
struct isa_extension ext;
while (parse_extension(&isa_string, &ext)) {