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| author | John Baldwin <jhb@FreeBSD.org> | 2023-08-25 19:34:16 +0000 |
|---|---|---|
| committer | John Baldwin <jhb@FreeBSD.org> | 2023-12-29 21:49:41 +0000 |
| commit | 90ac116d5e466e631fc5b8ee8e9fd16bd10c8f07 (patch) | |
| tree | 11bbffc6976019ac8265fd47b5a684b91c92a9d3 | |
| parent | 0609ca2f19d48d95005fc6b3b71422cce708c372 (diff) | |
| download | src-90ac116d5e466e631fc5b8ee8e9fd16bd10c8f07.tar.gz src-90ac116d5e466e631fc5b8ee8e9fd16bd10c8f07.zip | |
nehemiah RNG: Switch to using FPU_KERN_NOCTX
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D41583
(cherry picked from commit 7aec088cbce8381bd5bf730419b8fdcddf43b08d)
| -rw-r--r-- | sys/dev/random/nehemiah.c | 24 |
1 files changed, 2 insertions, 22 deletions
diff --git a/sys/dev/random/nehemiah.c b/sys/dev/random/nehemiah.c index 09c8c32c6d39..e01fdb952108 100644 --- a/sys/dev/random/nehemiah.c +++ b/sys/dev/random/nehemiah.c @@ -43,8 +43,6 @@ #include <dev/random/randomdev.h> -static void random_nehemiah_init(void); -static void random_nehemiah_deinit(void); static u_int random_nehemiah_read(void *, u_int); static struct random_source random_nehemiah = { @@ -53,8 +51,6 @@ static struct random_source random_nehemiah = { .rs_read = random_nehemiah_read }; -static struct fpu_kern_ctx *fpu_ctx_save; - /* This H/W source never stores more than 8 bytes in one go */ /* ARGSUSED */ static __inline size_t @@ -75,20 +71,6 @@ VIA_RNG_store(void *buf) return (0); } -static void -random_nehemiah_init(void) -{ - - fpu_ctx_save = fpu_kern_alloc_ctx(FPU_KERN_NORMAL); -} - -static void -random_nehemiah_deinit(void) -{ - - fpu_kern_free_ctx(fpu_ctx_save); -} - /* It is specifically allowed that buf is a multiple of sizeof(long) */ static u_int random_nehemiah_read(void *buf, u_int c) @@ -97,14 +79,14 @@ random_nehemiah_read(void *buf, u_int c) size_t count, ret; uint64_t tmp; - fpu_kern_enter(curthread, fpu_ctx_save, FPU_KERN_NORMAL); + fpu_kern_enter(curthread, NULL, FPU_KERN_NORMAL | FPU_KERN_NOCTX); b = buf; for (count = c; count > 0; count -= ret) { ret = MIN(VIA_RNG_store(&tmp), count); memcpy(b, &tmp, ret); b += ret; } - fpu_kern_leave(curthread, fpu_ctx_save); + fpu_kern_leave(curthread, NULL); return (c); } @@ -119,13 +101,11 @@ nehemiah_modevent(module_t mod, int type, void *unused) if (via_feature_rng & VIA_HAS_RNG) { random_source_register(&random_nehemiah); printf("random: fast provider: \"%s\"\n", random_nehemiah.rs_ident); - random_nehemiah_init(); } break; case MOD_UNLOAD: if (via_feature_rng & VIA_HAS_RNG) { - random_nehemiah_deinit(); random_source_deregister(&random_nehemiah); } break; |