mirror of
https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
synced 2024-11-22 11:14:18 +01:00
a6662c37b6
Summary: Provide an implementation of fpu_kern_enter/fpu_kern_leave for PPC to enable FPU, VSX, and Altivec usage in-kernel. The functions currently only support FPU_KERN_NOCTX, but this is sufficient for ossl(1) and many other users of the API. This patchset has been tested on powerpc64le using a modified version of the in-tree tools/tools/crypto/cryptocheck.c tool to check for FPU/Vec register clobbering along with a follow-up patch to enable ossl(4) on powerpc64*. Reviewed by: jhibbits MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D41540
138 lines
4.3 KiB
C
138 lines
4.3 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-4-Clause
|
|
*
|
|
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
|
|
* Copyright (C) 1995, 1996 TooLs GmbH.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by TooLs GmbH.
|
|
* 4. The name of TooLs GmbH may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
|
|
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
|
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
|
|
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* $NetBSD: pcb.h,v 1.4 2000/06/04 11:57:17 tsubai Exp $
|
|
*/
|
|
|
|
#ifndef _MACHINE_PCB_H_
|
|
#define _MACHINE_PCB_H_
|
|
|
|
#include <sys/endian.h>
|
|
|
|
#include <machine/setjmp.h>
|
|
|
|
#ifndef _STANDALONE
|
|
struct pcb {
|
|
register_t pcb_context[20]; /* non-volatile r12-r31 */
|
|
register_t pcb_cr; /* Condition register */
|
|
register_t pcb_sp; /* stack pointer */
|
|
register_t pcb_toc; /* toc pointer */
|
|
register_t pcb_lr; /* link register */
|
|
register_t pcb_dscr; /* dscr value */
|
|
register_t pcb_fscr;
|
|
register_t pcb_tar;
|
|
struct pmap *pcb_pm; /* pmap of our vmspace */
|
|
jmp_buf *pcb_onfault; /* For use during
|
|
copyin/copyout */
|
|
int pcb_flags;
|
|
#define PCB_FPU 0x1 /* Process uses FPU */
|
|
#define PCB_FPREGS 0x2 /* Process had FPU registers initialized */
|
|
#define PCB_VEC 0x4 /* Process uses Altivec */
|
|
#define PCB_VSX 0x8 /* Process had VSX initialized */
|
|
#define PCB_CDSCR 0x10 /* Process had Custom DSCR initialized */
|
|
#define PCB_HTM 0x20 /* Process had HTM initialized */
|
|
#define PCB_CFSCR 0x40 /* Process had FSCR updated */
|
|
#define PCB_KERN_FPU 0x80 /* Kernel is using FPU/Vector unit */
|
|
#define PCB_KERN_FPU_NOSAVE 0x100 /* FPU/Vec state not saved for kernel use */
|
|
#define PCB_VECREGS 0x200 /* Process had Altivec registers initialized */
|
|
struct fpu {
|
|
union {
|
|
#if _BYTE_ORDER == _BIG_ENDIAN
|
|
double fpr;
|
|
uint32_t vsr[4];
|
|
#else
|
|
uint32_t vsr[4];
|
|
struct {
|
|
double padding;
|
|
double fpr;
|
|
};
|
|
#endif
|
|
} fpr[32];
|
|
double fpscr; /* FPSCR stored as double for easier access */
|
|
} pcb_fpu; /* Floating point processor */
|
|
unsigned int pcb_fpcpu; /* which CPU had our FPU
|
|
stuff. */
|
|
struct vec {
|
|
uint32_t vr[32][4];
|
|
uint32_t spare[2];
|
|
uint32_t vrsave;
|
|
uint32_t vscr; /* aligned at vector element 3 */
|
|
} pcb_vec __aligned(16); /* Vector processor */
|
|
unsigned int pcb_veccpu; /* which CPU had our vector
|
|
stuff. */
|
|
struct htm {
|
|
uint64_t tfhar;
|
|
uint64_t texasr;
|
|
uint64_t tfiar;
|
|
} pcb_htm;
|
|
|
|
struct ebb {
|
|
uint64_t ebbhr;
|
|
uint64_t ebbrr;
|
|
uint64_t bescr;
|
|
} pcb_ebb;
|
|
|
|
struct lmon {
|
|
uint64_t lmrr;
|
|
uint64_t lmser;
|
|
} pcb_lm;
|
|
|
|
union {
|
|
struct {
|
|
vm_offset_t usr_segm; /* Base address */
|
|
register_t usr_vsid; /* USER_SR segment */
|
|
} aim;
|
|
struct {
|
|
register_t dbcr0;
|
|
} booke;
|
|
} pcb_cpu;
|
|
vm_offset_t pcb_lastill; /* Last illegal instruction */
|
|
};
|
|
#endif
|
|
|
|
#ifdef _KERNEL
|
|
|
|
struct trapframe;
|
|
|
|
#ifndef curpcb
|
|
extern struct pcb *curpcb;
|
|
#endif
|
|
|
|
extern struct pmap *curpm;
|
|
extern struct proc *fpuproc;
|
|
|
|
void makectx(struct trapframe *, struct pcb *);
|
|
void savectx(struct pcb *) __returns_twice;
|
|
|
|
#endif
|
|
#endif /* _MACHINE_PCB_H_ */
|