From 2bc6b218717b9d08f466f88209251d54bc09b207 Mon Sep 17 00:00:00 2001 From: Fuad Tabba Date: Tue, 22 Sep 2026 19:14:30 +0100 Subject: arm64/boot: Disable trapping of PMZR_EL0 writes to EL2 __init_el2_fgt2() writes one mask to both HDFGRTR2_EL2 and HDFGWTR2_EL2. PMZR_EL0 is write-only, so its trap bit, nPMZR_EL0, exists only in HDFGWTR2_EL2 and is therefore never set: a PMZR_EL0 write from the host traps to EL2, where the nVHE hypervisor has no handler and BUG()s. The kernel never writes PMZR_EL0, but kernel.perf_user_access=1 has the PMU driver set PMUSERENR_EL0.UEN for a task with a user-read event, so a write from EL0 reaches the trap and takes the host down without a panic message. Accumulate the HDFGWTR2_EL2 bits separately, as __init_el2_fgt() already does for HDFGWTR_EL2, and set nPMZR_EL0 with the other FEAT_PMUv3p9 bits. Fixes: 858c7bfcb35e1 ("arm64/boot: Enable EL2 requirements for FEAT_PMUv3p9") Cc: stable@vger.kernel.org Signed-off-by: Fuad Tabba Reviewed-by: Anshuman Khandual Reviewed-by: Oliver Upton Signed-off-by: Will Deacon --- include/crypto/blake2b.h | 156 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 156 insertions(+) create mode 100644 include/crypto/blake2b.h (limited to 'include/crypto/blake2b.h') diff --git a/include/crypto/blake2b.h b/include/crypto/blake2b.h new file mode 100644 index 000000000..3bc37fd10 --- /dev/null +++ b/include/crypto/blake2b.h @@ -0,0 +1,156 @@ +/* SPDX-License-Identifier: GPL-2.0 OR MIT */ + +#ifndef _CRYPTO_BLAKE2B_H +#define _CRYPTO_BLAKE2B_H + +#include +#include +#include + +enum blake2b_lengths { + BLAKE2B_BLOCK_SIZE = 128, + BLAKE2B_HASH_SIZE = 64, + BLAKE2B_KEY_SIZE = 64, + + BLAKE2B_160_HASH_SIZE = 20, + BLAKE2B_256_HASH_SIZE = 32, + BLAKE2B_384_HASH_SIZE = 48, + BLAKE2B_512_HASH_SIZE = 64, +}; + +/** + * struct blake2b_ctx - Context for hashing a message with BLAKE2b + * @h: compression function state + * @t: block counter + * @f: finalization indicator + * @buf: partial block buffer; 'buflen' bytes are valid + * @buflen: number of bytes buffered in @buf + * @outlen: length of output hash value in bytes, at most BLAKE2B_HASH_SIZE + */ +struct blake2b_ctx { + /* 'h', 't', and 'f' are used in assembly code, so keep them as-is. */ + u64 h[8]; + u64 t[2]; + u64 f[2]; + u8 buf[BLAKE2B_BLOCK_SIZE]; + unsigned int buflen; + unsigned int outlen; +}; + +enum blake2b_iv { + BLAKE2B_IV0 = 0x6A09E667F3BCC908ULL, + BLAKE2B_IV1 = 0xBB67AE8584CAA73BULL, + BLAKE2B_IV2 = 0x3C6EF372FE94F82BULL, + BLAKE2B_IV3 = 0xA54FF53A5F1D36F1ULL, + BLAKE2B_IV4 = 0x510E527FADE682D1ULL, + BLAKE2B_IV5 = 0x9B05688C2B3E6C1FULL, + BLAKE2B_IV6 = 0x1F83D9ABFB41BD6BULL, + BLAKE2B_IV7 = 0x5BE0CD19137E2179ULL, +}; + +static inline void __blake2b_init(struct blake2b_ctx *ctx, size_t outlen, + const void *key, size_t keylen) +{ + ctx->h[0] = BLAKE2B_IV0 ^ (0x01010000 | keylen << 8 | outlen); + ctx->h[1] = BLAKE2B_IV1; + ctx->h[2] = BLAKE2B_IV2; + ctx->h[3] = BLAKE2B_IV3; + ctx->h[4] = BLAKE2B_IV4; + ctx->h[5] = BLAKE2B_IV5; + ctx->h[6] = BLAKE2B_IV6; + ctx->h[7] = BLAKE2B_IV7; + ctx->t[0] = 0; + ctx->t[1] = 0; + ctx->f[0] = 0; + ctx->f[1] = 0; + ctx->buflen = 0; + ctx->outlen = outlen; + if (keylen) { + memcpy(ctx->buf, key, keylen); + memset(&ctx->buf[keylen], 0, BLAKE2B_BLOCK_SIZE - keylen); + ctx->buflen = BLAKE2B_BLOCK_SIZE; + } +} + +/** + * blake2b_init() - Initialize a BLAKE2b context for a new message (unkeyed) + * @ctx: the context to initialize + * @outlen: length of output hash value in bytes, at most BLAKE2B_HASH_SIZE + * + * Context: Any context. + */ +static inline void blake2b_init(struct blake2b_ctx *ctx, size_t outlen) +{ + __blake2b_init(ctx, outlen, NULL, 0); +} + +/** + * blake2b_init_key() - Initialize a BLAKE2b context for a new message (keyed) + * @ctx: the context to initialize + * @outlen: length of output hash value in bytes, at most BLAKE2B_HASH_SIZE + * @key: the key + * @keylen: the key length in bytes, at most BLAKE2B_KEY_SIZE + * + * Context: Any context. + */ +static inline void blake2b_init_key(struct blake2b_ctx *ctx, size_t outlen, + const void *key, size_t keylen) +{ + WARN_ON(IS_ENABLED(DEBUG) && (!outlen || outlen > BLAKE2B_HASH_SIZE || + !key || !keylen || keylen > BLAKE2B_KEY_SIZE)); + + __blake2b_init(ctx, outlen, key, keylen); +} + +/** + * blake2b_update() - Update a BLAKE2b context with message data + * @ctx: the context to update; must have been initialized + * @in: the message data + * @inlen: the data length in bytes + * + * This can be called any number of times. + * + * Context: Any context. + */ +void blake2b_update(struct blake2b_ctx *ctx, const u8 *in, size_t inlen); + +/** + * blake2b_final() - Finish computing a BLAKE2b hash + * @ctx: the context to finalize; must have been initialized + * @out: (output) the resulting BLAKE2b hash. Its length will be equal to the + * @outlen that was passed to blake2b_init() or blake2b_init_key(). + * + * After finishing, this zeroizes @ctx. So the caller does not need to do it. + * + * Context: Any context. + */ +void blake2b_final(struct blake2b_ctx *ctx, u8 *out); + +/** + * blake2b() - Compute BLAKE2b hash in one shot + * @key: the key, or NULL for an unkeyed hash + * @keylen: the key length in bytes (at most BLAKE2B_KEY_SIZE), or 0 for an + * unkeyed hash + * @in: the message data + * @inlen: the data length in bytes + * @out: (output) the resulting BLAKE2b hash, with length @outlen + * @outlen: length of output hash value in bytes, at most BLAKE2B_HASH_SIZE + * + * Context: Any context. + */ +static inline void blake2b(const u8 *key, size_t keylen, + const u8 *in, size_t inlen, + u8 *out, size_t outlen) +{ + struct blake2b_ctx ctx; + + WARN_ON(IS_ENABLED(DEBUG) && ((!in && inlen > 0) || !out || !outlen || + outlen > BLAKE2B_HASH_SIZE || keylen > BLAKE2B_KEY_SIZE || + (!key && keylen))); + + __blake2b_init(&ctx, outlen, key, keylen); + blake2b_update(&ctx, in, inlen); + blake2b_final(&ctx, out); +} + +#endif /* _CRYPTO_BLAKE2B_H */ -- cgit v1.3.1