8c6f8f3d5b
64bit and 32bit ABIs. As a side-effect, it enables AVX on capable
CPUs.
In particular:
- Query the CPU support for XSAVE, list of the supported extensions
and the required size of FPU save area. The hw.use_xsave tunable is
provided for disabling XSAVE, and hw.xsave_mask may be used to
select the enabled extensions.
- Remove the FPU save area from PCB and dynamically allocate the
(run-time sized) user save area on the top of the kernel stack,
right above the PCB. Reorganize the thread0 PCB initialization to
postpone it after BSP is queried for save area size.
- The dumppcb, stoppcbs and susppcbs now do not carry the FPU state as
well. FPU state is only useful for suspend, where it is saved in
dynamically allocated suspfpusave area.
- Use XSAVE and XRSTOR to save/restore FPU state, if supported and
enabled.
- Define new mcontext_t flag _MC_HASFPXSTATE, indicating that
mcontext_t has a valid pointer to out-of-struct extended FPU
state. Signal handlers are supplied with stack-allocated fpu
state. The sigreturn(2) and setcontext(2) syscall honour the flag,
allowing the signal handlers to inspect and manipilate extended
state in the interrupted context.
- The getcontext(2) never returns extended state, since there is no
place in the fixed-sized mcontext_t to place variable-sized save
area. And, since mcontext_t is embedded into ucontext_t, makes it
impossible to fix in a reasonable way. Instead of extending
getcontext(2) syscall, provide a sysarch(2) facility to query
extended FPU state.
- Add ptrace(2) support for getting and setting extended state; while
there, implement missed PT_I386_{GET,SET}XMMREGS for 32bit binaries.
- Change fpu_kern KPI to not expose struct fpu_kern_ctx layout to
consumers, making it opaque. Internally, struct fpu_kern_ctx now
contains a space for the extended state. Convert in-kernel consumers
of fpu_kern KPI both on i386 and amd64.
First version of the support for AVX was submitted by Tim Bird
<tim.bird am sony com> on behalf of Sony. This version was written
from scratch.
Tested by: pho (previous version), Yamagi Burmeister <lists yamagi org>
MFC after: 1 month
106 lines
3.8 KiB
C
106 lines
3.8 KiB
C
/*-
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* Copyright (c) 2010 Konstantin Belousov <kib@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _AESNI_H_
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#define _AESNI_H_
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#include <sys/types.h>
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#include <sys/malloc.h>
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#include <sys/queue.h>
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#include <opencrypto/cryptodev.h>
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#if defined(__amd64__) || (defined(__i386__) && !defined(PC98))
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#include <machine/cpufunc.h>
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#include <machine/cputypes.h>
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#include <machine/md_var.h>
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#include <machine/specialreg.h>
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#endif
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#if defined(__i386__)
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#include <machine/npx.h>
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#elif defined(__amd64__)
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#include <machine/fpu.h>
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#endif
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#define AES128_ROUNDS 10
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#define AES192_ROUNDS 12
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#define AES256_ROUNDS 14
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#define AES_SCHED_LEN ((AES256_ROUNDS + 1) * AES_BLOCK_LEN)
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struct aesni_session {
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uint8_t enc_schedule[AES_SCHED_LEN] __aligned(16);
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uint8_t dec_schedule[AES_SCHED_LEN] __aligned(16);
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uint8_t xts_schedule[AES_SCHED_LEN] __aligned(16);
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uint8_t iv[AES_BLOCK_LEN];
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int algo;
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int rounds;
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/* uint8_t *ses_ictx; */
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/* uint8_t *ses_octx; */
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/* int ses_mlen; */
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int used;
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uint32_t id;
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TAILQ_ENTRY(aesni_session) next;
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struct fpu_kern_ctx *fpu_ctx;
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};
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/*
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* Internal functions, implemented in assembler.
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*/
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void aesni_enc(int rounds, const uint8_t *key_schedule,
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const uint8_t from[AES_BLOCK_LEN], uint8_t to[AES_BLOCK_LEN],
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const uint8_t iv[AES_BLOCK_LEN]);
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void aesni_dec(int rounds, const uint8_t *key_schedule,
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const uint8_t from[AES_BLOCK_LEN], uint8_t to[AES_BLOCK_LEN],
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const uint8_t iv[AES_BLOCK_LEN]);
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void aesni_set_enckey(const uint8_t *userkey, uint8_t *encrypt_schedule,
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int number_of_rounds);
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void aesni_set_deckey(const uint8_t *encrypt_schedule,
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uint8_t *decrypt_schedule, int number_of_rounds);
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/*
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* Slightly more public interfaces.
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*/
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void aesni_encrypt_cbc(int rounds, const void *key_schedule, size_t len,
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const uint8_t *from, uint8_t *to, const uint8_t iv[AES_BLOCK_LEN]);
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void aesni_decrypt_cbc(int rounds, const void *key_schedule, size_t len,
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const uint8_t *from, const uint8_t iv[AES_BLOCK_LEN]);
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void aesni_encrypt_ecb(int rounds, const void *key_schedule, size_t len,
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const uint8_t from[AES_BLOCK_LEN], uint8_t to[AES_BLOCK_LEN]);
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void aesni_decrypt_ecb(int rounds, const void *key_schedule, size_t len,
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const uint8_t from[AES_BLOCK_LEN], uint8_t to[AES_BLOCK_LEN]);
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int aesni_cipher_setup(struct aesni_session *ses,
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struct cryptoini *encini);
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int aesni_cipher_process(struct aesni_session *ses,
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struct cryptodesc *enccrd, struct cryptop *crp);
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uint8_t *aesni_cipher_alloc(struct cryptodesc *enccrd, struct cryptop *crp,
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int *allocated);
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#endif
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