From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8D56EC4BA3B for ; Thu, 27 Feb 2020 11:49:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 309B424693 for ; Thu, 27 Feb 2020 11:49:11 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=c-s.fr header.i=@c-s.fr header.b="GpVgwULL" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729039AbgB0LtK (ORCPT ); Thu, 27 Feb 2020 06:49:10 -0500 Received: from pegase1.c-s.fr ([93.17.236.30]:59441 "EHLO pegase1.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729011AbgB0LtI (ORCPT ); Thu, 27 Feb 2020 06:49:08 -0500 Received: from localhost (mailhub1-int [192.168.12.234]) by localhost (Postfix) with ESMTP id 48SrYD4vBYz9tyj2; Thu, 27 Feb 2020 12:49:04 +0100 (CET) Authentication-Results: localhost; dkim=pass reason="1024-bit key; insecure key" header.d=c-s.fr header.i=@c-s.fr header.b=GpVgwULL; dkim-adsp=pass; dkim-atps=neutral X-Virus-Scanned: Debian amavisd-new at c-s.fr Received: from pegase1.c-s.fr ([192.168.12.234]) by localhost (pegase1.c-s.fr [192.168.12.234]) (amavisd-new, port 10024) with ESMTP id 6a1QKmnTj4ah; Thu, 27 Feb 2020 12:49:04 +0100 (CET) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase1.c-s.fr (Postfix) with ESMTP id 48SrYD3kmKz9tyhM; Thu, 27 Feb 2020 12:49:04 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=c-s.fr; s=mail; t=1582804144; bh=v++nFf1YDMpI1RjND0bjql9hn7vMKsQ4QFrWgUju3uY=; h=In-Reply-To:References:From:Subject:To:Cc:Date:From; b=GpVgwULL8lCvExL14Rv7a/1ULUf1Y6BRm4hFosl5vkLyayjV78ta2aWmodkWZ93FS 9c5BwyPIrwRdzmMa3ir/TpQw+aWqa2/VdKAmEmNMOGkphb1mBQFjFmSl96MdLezVLX spPjrqVKwNKB+oYG6gcFpsI60m7bbm6MfRS1qsMc= Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id B86008B872; Thu, 27 Feb 2020 12:49:05 +0100 (CET) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id fNasdHHX9dTg; Thu, 27 Feb 2020 12:49:05 +0100 (CET) Received: from pc16570vm.idsi0.si.c-s.fr (unknown [192.168.4.90]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 01D4A8B799; Thu, 27 Feb 2020 12:49:04 +0100 (CET) Received: by pc16570vm.idsi0.si.c-s.fr (Postfix, from userid 0) id C6F6465402; Thu, 27 Feb 2020 11:49:04 +0000 (UTC) Message-Id: In-Reply-To: References: From: Christophe Leroy Subject: [PATCH v4 08/13] powerpc/ptrace: split out TRANSACTIONAL_MEM related functions. To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , mikey@neuling.org Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Date: Thu, 27 Feb 2020 11:49:04 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Move TRANSACTIONAL_MEM functions out of ptrace.c, into ptrace-tm.c Signed-off-by: Christophe Leroy --- v4: leave asm-prototypes.h --- arch/powerpc/kernel/ptrace/Makefile | 1 + arch/powerpc/kernel/ptrace/ptrace-decl.h | 89 +++ arch/powerpc/kernel/ptrace/ptrace-tm.c | 851 +++++++++++++++++++++ arch/powerpc/kernel/ptrace/ptrace.c | 916 +---------------------- 4 files changed, 943 insertions(+), 914 deletions(-) create mode 100644 arch/powerpc/kernel/ptrace/ptrace-tm.c diff --git a/arch/powerpc/kernel/ptrace/Makefile b/arch/powerpc/kernel/ptrace/Makefile index f87eadf6e072..2d7f5f301536 100644 --- a/arch/powerpc/kernel/ptrace/Makefile +++ b/arch/powerpc/kernel/ptrace/Makefile @@ -13,3 +13,4 @@ obj-y += ptrace-novsx.o endif obj-$(CONFIG_ALTIVEC) += ptrace-altivec.o obj-$(CONFIG_SPE) += ptrace-spe.o +obj-$(CONFIG_PPC_TRANSACTIONAL_MEM) += ptrace-tm.o diff --git a/arch/powerpc/kernel/ptrace/ptrace-decl.h b/arch/powerpc/kernel/ptrace/ptrace-decl.h index 8a362f97f1d6..8d076818f1de 100644 --- a/arch/powerpc/kernel/ptrace/ptrace-decl.h +++ b/arch/powerpc/kernel/ptrace/ptrace-decl.h @@ -1,5 +1,27 @@ /* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Set of msr bits that gdb can change on behalf of a process. + */ +#ifdef CONFIG_PPC_ADV_DEBUG_REGS +#define MSR_DEBUGCHANGE 0 +#else +#define MSR_DEBUGCHANGE (MSR_SE | MSR_BE) +#endif + +/* + * Max register writeable via put_reg + */ +#ifdef CONFIG_PPC32 +#define PT_MAX_PUT_REG PT_MQ +#else +#define PT_MAX_PUT_REG PT_CCR +#endif + +#define TVSO(f) (offsetof(struct thread_vr_state, f)) +#define TFSO(f) (offsetof(struct thread_fp_state, f)) +#define TSO(f) (offsetof(struct thread_struct, f)) + /* ptrace-(no)vsx */ int fpr_get(struct task_struct *target, const struct user_regset *regset, @@ -37,8 +59,75 @@ int evr_set(struct task_struct *target, const struct user_regset *regset, /* ptrace */ +int gpr32_get_common(struct task_struct *target, + const struct user_regset *regset, + unsigned int pos, unsigned int count, + void *kbuf, void __user *ubuf, + unsigned long *regs); +int gpr32_set_common(struct task_struct *target, + const struct user_regset *regset, + unsigned int pos, unsigned int count, + const void *kbuf, const void __user *ubuf, + unsigned long *regs); + +/* ptrace-tm */ + #ifdef CONFIG_PPC_TRANSACTIONAL_MEM void flush_tmregs_to_thread(struct task_struct *tsk); #else static inline void flush_tmregs_to_thread(struct task_struct *tsk) { } #endif + +int tm_cgpr_active(struct task_struct *target, const struct user_regset *regset); +int tm_cgpr_get(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf); +int tm_cgpr_set(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, + const void *kbuf, const void __user *ubuf); +int tm_cfpr_active(struct task_struct *target, const struct user_regset *regset); +int tm_cfpr_get(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf); +int tm_cfpr_set(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, + const void *kbuf, const void __user *ubuf); +int tm_cvmx_active(struct task_struct *target, const struct user_regset *regset); +int tm_cvmx_get(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf); +int tm_cvmx_set(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, + const void *kbuf, const void __user *ubuf); +int tm_cvsx_active(struct task_struct *target, const struct user_regset *regset); +int tm_cvsx_get(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf); +int tm_cvsx_set(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, + const void *kbuf, const void __user *ubuf); +int tm_spr_active(struct task_struct *target, const struct user_regset *regset); +int tm_spr_get(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf); +int tm_spr_set(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, + const void *kbuf, const void __user *ubuf); +int tm_tar_active(struct task_struct *target, const struct user_regset *regset); +int tm_tar_get(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf); +int tm_tar_set(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, + const void *kbuf, const void __user *ubuf); +int tm_ppr_active(struct task_struct *target, const struct user_regset *regset); +int tm_ppr_get(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf); +int tm_ppr_set(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, + const void *kbuf, const void __user *ubuf); +int tm_dscr_active(struct task_struct *target, const struct user_regset *regset); +int tm_dscr_get(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf); +int tm_dscr_set(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, + const void *kbuf, const void __user *ubuf); +int tm_cgpr32_get(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf); +int tm_cgpr32_set(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, + const void *kbuf, const void __user *ubuf); diff --git a/arch/powerpc/kernel/ptrace/ptrace-tm.c b/arch/powerpc/kernel/ptrace/ptrace-tm.c new file mode 100644 index 000000000000..d75aff31f637 --- /dev/null +++ b/arch/powerpc/kernel/ptrace/ptrace-tm.c @@ -0,0 +1,851 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +#include + +#include +#include +#include + +#include "ptrace-decl.h" + +void flush_tmregs_to_thread(struct task_struct *tsk) +{ + /* + * If task is not current, it will have been flushed already to + * it's thread_struct during __switch_to(). + * + * A reclaim flushes ALL the state or if not in TM save TM SPRs + * in the appropriate thread structures from live. + */ + + if (!cpu_has_feature(CPU_FTR_TM) || tsk != current) + return; + + if (MSR_TM_SUSPENDED(mfmsr())) { + tm_reclaim_current(TM_CAUSE_SIGNAL); + } else { + tm_enable(); + tm_save_sprs(&tsk->thread); + } +} + +static unsigned long get_user_ckpt_msr(struct task_struct *task) +{ + return task->thread.ckpt_regs.msr | task->thread.fpexc_mode; +} + +static int set_user_ckpt_msr(struct task_struct *task, unsigned long msr) +{ + task->thread.ckpt_regs.msr &= ~MSR_DEBUGCHANGE; + task->thread.ckpt_regs.msr |= msr & MSR_DEBUGCHANGE; + return 0; +} + +static int set_user_ckpt_trap(struct task_struct *task, unsigned long trap) +{ + task->thread.ckpt_regs.trap = trap & 0xfff0; + return 0; +} + +/** + * tm_cgpr_active - get active number of registers in CGPR + * @target: The target task. + * @regset: The user regset structure. + * + * This function checks for the active number of available + * regisers in transaction checkpointed GPR category. + */ +int tm_cgpr_active(struct task_struct *target, const struct user_regset *regset) +{ + if (!cpu_has_feature(CPU_FTR_TM)) + return -ENODEV; + + if (!MSR_TM_ACTIVE(target->thread.regs->msr)) + return 0; + + return regset->n; +} + +/** + * tm_cgpr_get - get CGPR registers + * @target: The target task. + * @regset: The user regset structure. + * @pos: The buffer position. + * @count: Number of bytes to copy. + * @kbuf: Kernel buffer to copy from. + * @ubuf: User buffer to copy into. + * + * This function gets transaction checkpointed GPR registers. + * + * When the transaction is active, 'ckpt_regs' holds all the checkpointed + * GPR register values for the current transaction to fall back on if it + * aborts in between. This function gets those checkpointed GPR registers. + * The userspace interface buffer layout is as follows. + * + * struct data { + * struct pt_regs ckpt_regs; + * }; + */ +int tm_cgpr_get(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf) +{ + int ret; + + if (!cpu_has_feature(CPU_FTR_TM)) + return -ENODEV; + + if (!MSR_TM_ACTIVE(target->thread.regs->msr)) + return -ENODATA; + + flush_tmregs_to_thread(target); + flush_fp_to_thread(target); + flush_altivec_to_thread(target); + + ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, + &target->thread.ckpt_regs, + 0, offsetof(struct pt_regs, msr)); + if (!ret) { + unsigned long msr = get_user_ckpt_msr(target); + + ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &msr, + offsetof(struct pt_regs, msr), + offsetof(struct pt_regs, msr) + + sizeof(msr)); + } + + BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) != + offsetof(struct pt_regs, msr) + sizeof(long)); + + if (!ret) + ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, + &target->thread.ckpt_regs.orig_gpr3, + offsetof(struct pt_regs, orig_gpr3), + sizeof(struct user_pt_regs)); + if (!ret) + ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf, + sizeof(struct user_pt_regs), -1); + + return ret; +} + +/* + * tm_cgpr_set - set the CGPR registers + * @target: The target task. + * @regset: The user regset structure. + * @pos: The buffer position. + * @count: Number of bytes to copy. + * @kbuf: Kernel buffer to copy into. + * @ubuf: User buffer to copy from. + * + * This function sets in transaction checkpointed GPR registers. + * + * When the transaction is active, 'ckpt_regs' holds the checkpointed + * GPR register values for the current transaction to fall back on if it + * aborts in between. This function sets those checkpointed GPR registers. + * The userspace interface buffer layout is as follows. + * + * struct data { + * struct pt_regs ckpt_regs; + * }; + */ +int tm_cgpr_set(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, + const void *kbuf, const void __user *ubuf) +{ + unsigned long reg; + int ret; + + if (!cpu_has_feature(CPU_FTR_TM)) + return -ENODEV; + + if (!MSR_TM_ACTIVE(target->thread.regs->msr)) + return -ENODATA; + + flush_tmregs_to_thread(target); + flush_fp_to_thread(target); + flush_altivec_to_thread(target); + + ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, + &target->thread.ckpt_regs, + 0, PT_MSR * sizeof(reg)); + + if (!ret && count > 0) { + ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, ®, + PT_MSR * sizeof(reg), + (PT_MSR + 1) * sizeof(reg)); + if (!ret) + ret = set_user_ckpt_msr(target, reg); + } + + BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) != + offsetof(struct pt_regs, msr) + sizeof(long)); + + if (!ret) + ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, + &target->thread.ckpt_regs.orig_gpr3, + PT_ORIG_R3 * sizeof(reg), + (PT_MAX_PUT_REG + 1) * sizeof(reg)); + + if (PT_MAX_PUT_REG + 1 < PT_TRAP && !ret) + ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, + (PT_MAX_PUT_REG + 1) * sizeof(reg), + PT_TRAP * sizeof(reg)); + + if (!ret && count > 0) { + ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, ®, + PT_TRAP * sizeof(reg), + (PT_TRAP + 1) * sizeof(reg)); + if (!ret) + ret = set_user_ckpt_trap(target, reg); + } + + if (!ret) + ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, + (PT_TRAP + 1) * sizeof(reg), -1); + + return ret; +} + +/** + * tm_cfpr_active - get active number of registers in CFPR + * @target: The target task. + * @regset: The user regset structure. + * + * This function checks for the active number of available + * regisers in transaction checkpointed FPR category. + */ +int tm_cfpr_active(struct task_struct *target, const struct user_regset *regset) +{ + if (!cpu_has_feature(CPU_FTR_TM)) + return -ENODEV; + + if (!MSR_TM_ACTIVE(target->thread.regs->msr)) + return 0; + + return regset->n; +} + +/** + * tm_cfpr_get - get CFPR registers + * @target: The target task. + * @regset: The user regset structure. + * @pos: The buffer position. + * @count: Number of bytes to copy. + * @kbuf: Kernel buffer to copy from. + * @ubuf: User buffer to copy into. + * + * This function gets in transaction checkpointed FPR registers. + * + * When the transaction is active 'ckfp_state' holds the checkpointed + * values for the current transaction to fall back on if it aborts + * in between. This function gets those checkpointed FPR registers. + * The userspace interface buffer layout is as follows. + * + * struct data { + * u64 fpr[32]; + * u64 fpscr; + *}; + */ +int tm_cfpr_get(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf) +{ + u64 buf[33]; + int i; + + if (!cpu_has_feature(CPU_FTR_TM)) + return -ENODEV; + + if (!MSR_TM_ACTIVE(target->thread.regs->msr)) + return -ENODATA; + + flush_tmregs_to_thread(target); + flush_fp_to_thread(target); + flush_altivec_to_thread(target); + + /* copy to local buffer then write that out */ + for (i = 0; i < 32 ; i++) + buf[i] = target->thread.TS_CKFPR(i); + buf[32] = target->thread.ckfp_state.fpscr; + return user_regset_copyout(&pos, &count, &kbuf, &ubuf, buf, 0, -1); +} + +/** + * tm_cfpr_set - set CFPR registers + * @target: The target task. + * @regset: The user regset structure. + * @pos: The buffer position. + * @count: Number of bytes to copy. + * @kbuf: Kernel buffer to copy into. + * @ubuf: User buffer to copy from. + * + * This function sets in transaction checkpointed FPR registers. + * + * When the transaction is active 'ckfp_state' holds the checkpointed + * FPR register values for the current transaction to fall back on + * if it aborts in between. This function sets these checkpointed + * FPR registers. The userspace interface buffer layout is as follows. + * + * struct data { + * u64 fpr[32]; + * u64 fpscr; + *}; + */ +int tm_cfpr_set(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, + const void *kbuf, const void __user *ubuf) +{ + u64 buf[33]; + int i; + + if (!cpu_has_feature(CPU_FTR_TM)) + return -ENODEV; + + if (!MSR_TM_ACTIVE(target->thread.regs->msr)) + return -ENODATA; + + flush_tmregs_to_thread(target); + flush_fp_to_thread(target); + flush_altivec_to_thread(target); + + for (i = 0; i < 32; i++) + buf[i] = target->thread.TS_CKFPR(i); + buf[32] = target->thread.ckfp_state.fpscr; + + /* copy to local buffer then write that out */ + i = user_regset_copyin(&pos, &count, &kbuf, &ubuf, buf, 0, -1); + if (i) + return i; + for (i = 0; i < 32 ; i++) + target->thread.TS_CKFPR(i) = buf[i]; + target->thread.ckfp_state.fpscr = buf[32]; + return 0; +} + +/** + * tm_cvmx_active - get active number of registers in CVMX + * @target: The target task. + * @regset: The user regset structure. + * + * This function checks for the active number of available + * regisers in checkpointed VMX category. + */ +int tm_cvmx_active(struct task_struct *target, const struct user_regset *regset) +{ + if (!cpu_has_feature(CPU_FTR_TM)) + return -ENODEV; + + if (!MSR_TM_ACTIVE(target->thread.regs->msr)) + return 0; + + return regset->n; +} + +/** + * tm_cvmx_get - get CMVX registers + * @target: The target task. + * @regset: The user regset structure. + * @pos: The buffer position. + * @count: Number of bytes to copy. + * @kbuf: Kernel buffer to copy from. + * @ubuf: User buffer to copy into. + * + * This function gets in transaction checkpointed VMX registers. + * + * When the transaction is active 'ckvr_state' and 'ckvrsave' hold + * the checkpointed values for the current transaction to fall + * back on if it aborts in between. The userspace interface buffer + * layout is as follows. + * + * struct data { + * vector128 vr[32]; + * vector128 vscr; + * vector128 vrsave; + *}; + */ +int tm_cvmx_get(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf) +{ + int ret; + + BUILD_BUG_ON(TVSO(vscr) != TVSO(vr[32])); + + if (!cpu_has_feature(CPU_FTR_TM)) + return -ENODEV; + + if (!MSR_TM_ACTIVE(target->thread.regs->msr)) + return -ENODATA; + + /* Flush the state */ + flush_tmregs_to_thread(target); + flush_fp_to_thread(target); + flush_altivec_to_thread(target); + + ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &target->thread.ckvr_state, + 0, 33 * sizeof(vector128)); + if (!ret) { + /* + * Copy out only the low-order word of vrsave. + */ + union { + elf_vrreg_t reg; + u32 word; + } vrsave; + memset(&vrsave, 0, sizeof(vrsave)); + vrsave.word = target->thread.ckvrsave; + ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &vrsave, + 33 * sizeof(vector128), -1); + } + + return ret; +} + +/** + * tm_cvmx_set - set CMVX registers + * @target: The target task. + * @regset: The user regset structure. + * @pos: The buffer position. + * @count: Number of bytes to copy. + * @kbuf: Kernel buffer to copy into. + * @ubuf: User buffer to copy from. + * + * This function sets in transaction checkpointed VMX registers. + * + * When the transaction is active 'ckvr_state' and 'ckvrsave' hold + * the checkpointed values for the current transaction to fall + * back on if it aborts in between. The userspace interface buffer + * layout is as follows. + * + * struct data { + * vector128 vr[32]; + * vector128 vscr; + * vector128 vrsave; + *}; + */ +int tm_cvmx_set(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, + const void *kbuf, const void __user *ubuf) +{ + int ret; + + BUILD_BUG_ON(TVSO(vscr) != TVSO(vr[32])); + + if (!cpu_has_feature(CPU_FTR_TM)) + return -ENODEV; + + if (!MSR_TM_ACTIVE(target->thread.regs->msr)) + return -ENODATA; + + flush_tmregs_to_thread(target); + flush_fp_to_thread(target); + flush_altivec_to_thread(target); + + ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &target->thread.ckvr_state, + 0, 33 * sizeof(vector128)); + if (!ret && count > 0) { + /* + * We use only the low-order word of vrsave. + */ + union { + elf_vrreg_t reg; + u32 word; + } vrsave; + memset(&vrsave, 0, sizeof(vrsave)); + vrsave.word = target->thread.ckvrsave; + ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &vrsave, + 33 * sizeof(vector128), -1); + if (!ret) + target->thread.ckvrsave = vrsave.word; + } + + return ret; +} + +/** + * tm_cvsx_active - get active number of registers in CVSX + * @target: The target task. + * @regset: The user regset structure. + * + * This function checks for the active number of available + * regisers in transaction checkpointed VSX category. + */ +int tm_cvsx_active(struct task_struct *target, const struct user_regset *regset) +{ + if (!cpu_has_feature(CPU_FTR_TM)) + return -ENODEV; + + if (!MSR_TM_ACTIVE(target->thread.regs->msr)) + return 0; + + flush_vsx_to_thread(target); + return target->thread.used_vsr ? regset->n : 0; +} + +/** + * tm_cvsx_get - get CVSX registers + * @target: The target task. + * @regset: The user regset structure. + * @pos: The buffer position. + * @count: Number of bytes to copy. + * @kbuf: Kernel buffer to copy from. + * @ubuf: User buffer to copy into. + * + * This function gets in transaction checkpointed VSX registers. + * + * When the transaction is active 'ckfp_state' holds the checkpointed + * values for the current transaction to fall back on if it aborts + * in between. This function gets those checkpointed VSX registers. + * The userspace interface buffer layout is as follows. + * + * struct data { + * u64 vsx[32]; + *}; + */ +int tm_cvsx_get(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf) +{ + u64 buf[32]; + int ret, i; + + if (!cpu_has_feature(CPU_FTR_TM)) + return -ENODEV; + + if (!MSR_TM_ACTIVE(target->thread.regs->msr)) + return -ENODATA; + + /* Flush the state */ + flush_tmregs_to_thread(target); + flush_fp_to_thread(target); + flush_altivec_to_thread(target); + flush_vsx_to_thread(target); + + for (i = 0; i < 32 ; i++) + buf[i] = target->thread.ckfp_state.fpr[i][TS_VSRLOWOFFSET]; + ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, + buf, 0, 32 * sizeof(double)); + + return ret; +} + +/** + * tm_cvsx_set - set CFPR registers + * @target: The target task. + * @regset: The user regset structure. + * @pos: The buffer position. + * @count: Number of bytes to copy. + * @kbuf: Kernel buffer to copy into. + * @ubuf: User buffer to copy from. + * + * This function sets in transaction checkpointed VSX registers. + * + * When the transaction is active 'ckfp_state' holds the checkpointed + * VSX register values for the current transaction to fall back on + * if it aborts in between. This function sets these checkpointed + * FPR registers. The userspace interface buffer layout is as follows. + * + * struct data { + * u64 vsx[32]; + *}; + */ +int tm_cvsx_set(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, + const void *kbuf, const void __user *ubuf) +{ + u64 buf[32]; + int ret, i; + + if (!cpu_has_feature(CPU_FTR_TM)) + return -ENODEV; + + if (!MSR_TM_ACTIVE(target->thread.regs->msr)) + return -ENODATA; + + /* Flush the state */ + flush_tmregs_to_thread(target); + flush_fp_to_thread(target); + flush_altivec_to_thread(target); + flush_vsx_to_thread(target); + + for (i = 0; i < 32 ; i++) + buf[i] = target->thread.ckfp_state.fpr[i][TS_VSRLOWOFFSET]; + + ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, + buf, 0, 32 * sizeof(double)); + if (!ret) + for (i = 0; i < 32 ; i++) + target->thread.ckfp_state.fpr[i][TS_VSRLOWOFFSET] = buf[i]; + + return ret; +} + +/** + * tm_spr_active - get active number of registers in TM SPR + * @target: The target task. + * @regset: The user regset structure. + * + * This function checks the active number of available + * regisers in the transactional memory SPR category. + */ +int tm_spr_active(struct task_struct *target, const struct user_regset *regset) +{ + if (!cpu_has_feature(CPU_FTR_TM)) + return -ENODEV; + + return regset->n; +} + +/** + * tm_spr_get - get the TM related SPR registers + * @target: The target task. + * @regset: The user regset structure. + * @pos: The buffer position. + * @count: Number of bytes to copy. + * @kbuf: Kernel buffer to copy from. + * @ubuf: User buffer to copy into. + * + * This function gets transactional memory related SPR registers. + * The userspace interface buffer layout is as follows. + * + * struct { + * u64 tm_tfhar; + * u64 tm_texasr; + * u64 tm_tfiar; + * }; + */ +int tm_spr_get(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf) +{ + int ret; + + /* Build tests */ + BUILD_BUG_ON(TSO(tm_tfhar) + sizeof(u64) != TSO(tm_texasr)); + BUILD_BUG_ON(TSO(tm_texasr) + sizeof(u64) != TSO(tm_tfiar)); + BUILD_BUG_ON(TSO(tm_tfiar) + sizeof(u64) != TSO(ckpt_regs)); + + if (!cpu_has_feature(CPU_FTR_TM)) + return -ENODEV; + + /* Flush the states */ + flush_tmregs_to_thread(target); + flush_fp_to_thread(target); + flush_altivec_to_thread(target); + + /* TFHAR register */ + ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, + &target->thread.tm_tfhar, 0, sizeof(u64)); + + /* TEXASR register */ + if (!ret) + ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, + &target->thread.tm_texasr, sizeof(u64), + 2 * sizeof(u64)); + + /* TFIAR register */ + if (!ret) + ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, + &target->thread.tm_tfiar, + 2 * sizeof(u64), 3 * sizeof(u64)); + return ret; +} + +/** + * tm_spr_set - set the TM related SPR registers + * @target: The target task. + * @regset: The user regset structure. + * @pos: The buffer position. + * @count: Number of bytes to copy. + * @kbuf: Kernel buffer to copy into. + * @ubuf: User buffer to copy from. + * + * This function sets transactional memory related SPR registers. + * The userspace interface buffer layout is as follows. + * + * struct { + * u64 tm_tfhar; + * u64 tm_texasr; + * u64 tm_tfiar; + * }; + */ +int tm_spr_set(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, + const void *kbuf, const void __user *ubuf) +{ + int ret; + + /* Build tests */ + BUILD_BUG_ON(TSO(tm_tfhar) + sizeof(u64) != TSO(tm_texasr)); + BUILD_BUG_ON(TSO(tm_texasr) + sizeof(u64) != TSO(tm_tfiar)); + BUILD_BUG_ON(TSO(tm_tfiar) + sizeof(u64) != TSO(ckpt_regs)); + + if (!cpu_has_feature(CPU_FTR_TM)) + return -ENODEV; + + /* Flush the states */ + flush_tmregs_to_thread(target); + flush_fp_to_thread(target); + flush_altivec_to_thread(target); + + /* TFHAR register */ + ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, + &target->thread.tm_tfhar, 0, sizeof(u64)); + + /* TEXASR register */ + if (!ret) + ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, + &target->thread.tm_texasr, sizeof(u64), + 2 * sizeof(u64)); + + /* TFIAR register */ + if (!ret) + ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, + &target->thread.tm_tfiar, + 2 * sizeof(u64), 3 * sizeof(u64)); + return ret; +} + +int tm_tar_active(struct task_struct *target, const struct user_regset *regset) +{ + if (!cpu_has_feature(CPU_FTR_TM)) + return -ENODEV; + + if (MSR_TM_ACTIVE(target->thread.regs->msr)) + return regset->n; + + return 0; +} + +int tm_tar_get(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf) +{ + int ret; + + if (!cpu_has_feature(CPU_FTR_TM)) + return -ENODEV; + + if (!MSR_TM_ACTIVE(target->thread.regs->msr)) + return -ENODATA; + + ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, + &target->thread.tm_tar, 0, sizeof(u64)); + return ret; +} + +int tm_tar_set(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, + const void *kbuf, const void __user *ubuf) +{ + int ret; + + if (!cpu_has_feature(CPU_FTR_TM)) + return -ENODEV; + + if (!MSR_TM_ACTIVE(target->thread.regs->msr)) + return -ENODATA; + + ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, + &target->thread.tm_tar, 0, sizeof(u64)); + return ret; +} + +int tm_ppr_active(struct task_struct *target, const struct user_regset *regset) +{ + if (!cpu_has_feature(CPU_FTR_TM)) + return -ENODEV; + + if (MSR_TM_ACTIVE(target->thread.regs->msr)) + return regset->n; + + return 0; +} + + +int tm_ppr_get(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf) +{ + int ret; + + if (!cpu_has_feature(CPU_FTR_TM)) + return -ENODEV; + + if (!MSR_TM_ACTIVE(target->thread.regs->msr)) + return -ENODATA; + + ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, + &target->thread.tm_ppr, 0, sizeof(u64)); + return ret; +} + +int tm_ppr_set(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, + const void *kbuf, const void __user *ubuf) +{ + int ret; + + if (!cpu_has_feature(CPU_FTR_TM)) + return -ENODEV; + + if (!MSR_TM_ACTIVE(target->thread.regs->msr)) + return -ENODATA; + + ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, + &target->thread.tm_ppr, 0, sizeof(u64)); + return ret; +} + +int tm_dscr_active(struct task_struct *target, const struct user_regset *regset) +{ + if (!cpu_has_feature(CPU_FTR_TM)) + return -ENODEV; + + if (MSR_TM_ACTIVE(target->thread.regs->msr)) + return regset->n; + + return 0; +} + +int tm_dscr_get(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf) +{ + int ret; + + if (!cpu_has_feature(CPU_FTR_TM)) + return -ENODEV; + + if (!MSR_TM_ACTIVE(target->thread.regs->msr)) + return -ENODATA; + + ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, + &target->thread.tm_dscr, 0, sizeof(u64)); + return ret; +} + +int tm_dscr_set(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, + const void *kbuf, const void __user *ubuf) +{ + int ret; + + if (!cpu_has_feature(CPU_FTR_TM)) + return -ENODEV; + + if (!MSR_TM_ACTIVE(target->thread.regs->msr)) + return -ENODATA; + + ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, + &target->thread.tm_dscr, 0, sizeof(u64)); + return ret; +} + +int tm_cgpr32_get(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf) +{ + return gpr32_get_common(target, regset, pos, count, kbuf, ubuf, + &target->thread.ckpt_regs.gpr[0]); +} + +int tm_cgpr32_set(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, + const void *kbuf, const void __user *ubuf) +{ + return gpr32_set_common(target, regset, pos, count, kbuf, ubuf, + &target->thread.ckpt_regs.gpr[0]); +} diff --git a/arch/powerpc/kernel/ptrace/ptrace.c b/arch/powerpc/kernel/ptrace/ptrace.c index ca2b4d804992..2ed032f00a19 100644 --- a/arch/powerpc/kernel/ptrace/ptrace.c +++ b/arch/powerpc/kernel/ptrace/ptrace.c @@ -26,7 +26,6 @@ #include #include -#include #include #include @@ -47,10 +46,6 @@ struct pt_regs_offset { {.name = STR(gpr##num), .offset = offsetof(struct pt_regs, gpr[num])} #define REG_OFFSET_END {.name = NULL, .offset = 0} -#define TVSO(f) (offsetof(struct thread_vr_state, f)) -#define TFSO(f) (offsetof(struct thread_fp_state, f)) -#define TSO(f) (offsetof(struct thread_struct, f)) - static const struct pt_regs_offset regoffset_table[] = { GPR_OFFSET_NAME(0), GPR_OFFSET_NAME(1), @@ -101,29 +96,6 @@ static const struct pt_regs_offset regoffset_table[] = { REG_OFFSET_END, }; -#ifdef CONFIG_PPC_TRANSACTIONAL_MEM -void flush_tmregs_to_thread(struct task_struct *tsk) -{ - /* - * If task is not current, it will have been flushed already to - * it's thread_struct during __switch_to(). - * - * A reclaim flushes ALL the state or if not in TM save TM SPRs - * in the appropriate thread structures from live. - */ - - if ((!cpu_has_feature(CPU_FTR_TM)) || (tsk != current)) - return; - - if (MSR_TM_SUSPENDED(mfmsr())) { - tm_reclaim_current(TM_CAUSE_SIGNAL); - } else { - tm_enable(); - tm_save_sprs(&(tsk->thread)); - } -} -#endif - /** * regs_query_register_offset() - query register offset from its name * @name: the name of a register @@ -161,24 +133,6 @@ const char *regs_query_register_name(unsigned int offset) * in exit.c or in signal.c. */ -/* - * Set of msr bits that gdb can change on behalf of a process. - */ -#ifdef CONFIG_PPC_ADV_DEBUG_REGS -#define MSR_DEBUGCHANGE 0 -#else -#define MSR_DEBUGCHANGE (MSR_SE | MSR_BE) -#endif - -/* - * Max register writeable via put_reg - */ -#ifdef CONFIG_PPC32 -#define PT_MAX_PUT_REG PT_MQ -#else -#define PT_MAX_PUT_REG PT_CCR -#endif - static unsigned long get_user_msr(struct task_struct *task) { return task->thread.regs->msr | task->thread.fpexc_mode; @@ -191,26 +145,6 @@ static int set_user_msr(struct task_struct *task, unsigned long msr) return 0; } -#ifdef CONFIG_PPC_TRANSACTIONAL_MEM -static unsigned long get_user_ckpt_msr(struct task_struct *task) -{ - return task->thread.ckpt_regs.msr | task->thread.fpexc_mode; -} - -static int set_user_ckpt_msr(struct task_struct *task, unsigned long msr) -{ - task->thread.ckpt_regs.msr &= ~MSR_DEBUGCHANGE; - task->thread.ckpt_regs.msr |= msr & MSR_DEBUGCHANGE; - return 0; -} - -static int set_user_ckpt_trap(struct task_struct *task, unsigned long trap) -{ - task->thread.ckpt_regs.trap = trap & 0xfff0; - return 0; -} -#endif - #ifdef CONFIG_PPC64 static int get_user_dscr(struct task_struct *task, unsigned long *data) { @@ -403,832 +337,6 @@ static int gpr_set(struct task_struct *target, const struct user_regset *regset, return ret; } -#ifdef CONFIG_PPC_TRANSACTIONAL_MEM -/** - * tm_cgpr_active - get active number of registers in CGPR - * @target: The target task. - * @regset: The user regset structure. - * - * This function checks for the active number of available - * regisers in transaction checkpointed GPR category. - */ -static int tm_cgpr_active(struct task_struct *target, - const struct user_regset *regset) -{ - if (!cpu_has_feature(CPU_FTR_TM)) - return -ENODEV; - - if (!MSR_TM_ACTIVE(target->thread.regs->msr)) - return 0; - - return regset->n; -} - -/** - * tm_cgpr_get - get CGPR registers - * @target: The target task. - * @regset: The user regset structure. - * @pos: The buffer position. - * @count: Number of bytes to copy. - * @kbuf: Kernel buffer to copy from. - * @ubuf: User buffer to copy into. - * - * This function gets transaction checkpointed GPR registers. - * - * When the transaction is active, 'ckpt_regs' holds all the checkpointed - * GPR register values for the current transaction to fall back on if it - * aborts in between. This function gets those checkpointed GPR registers. - * The userspace interface buffer layout is as follows. - * - * struct data { - * struct pt_regs ckpt_regs; - * }; - */ -static int tm_cgpr_get(struct task_struct *target, - const struct user_regset *regset, - unsigned int pos, unsigned int count, - void *kbuf, void __user *ubuf) -{ - int ret; - - if (!cpu_has_feature(CPU_FTR_TM)) - return -ENODEV; - - if (!MSR_TM_ACTIVE(target->thread.regs->msr)) - return -ENODATA; - - flush_tmregs_to_thread(target); - flush_fp_to_thread(target); - flush_altivec_to_thread(target); - - ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, - &target->thread.ckpt_regs, - 0, offsetof(struct pt_regs, msr)); - if (!ret) { - unsigned long msr = get_user_ckpt_msr(target); - - ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &msr, - offsetof(struct pt_regs, msr), - offsetof(struct pt_regs, msr) + - sizeof(msr)); - } - - BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) != - offsetof(struct pt_regs, msr) + sizeof(long)); - - if (!ret) - ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, - &target->thread.ckpt_regs.orig_gpr3, - offsetof(struct pt_regs, orig_gpr3), - sizeof(struct user_pt_regs)); - if (!ret) - ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf, - sizeof(struct user_pt_regs), -1); - - return ret; -} - -/* - * tm_cgpr_set - set the CGPR registers - * @target: The target task. - * @regset: The user regset structure. - * @pos: The buffer position. - * @count: Number of bytes to copy. - * @kbuf: Kernel buffer to copy into. - * @ubuf: User buffer to copy from. - * - * This function sets in transaction checkpointed GPR registers. - * - * When the transaction is active, 'ckpt_regs' holds the checkpointed - * GPR register values for the current transaction to fall back on if it - * aborts in between. This function sets those checkpointed GPR registers. - * The userspace interface buffer layout is as follows. - * - * struct data { - * struct pt_regs ckpt_regs; - * }; - */ -static int tm_cgpr_set(struct task_struct *target, - const struct user_regset *regset, - unsigned int pos, unsigned int count, - const void *kbuf, const void __user *ubuf) -{ - unsigned long reg; - int ret; - - if (!cpu_has_feature(CPU_FTR_TM)) - return -ENODEV; - - if (!MSR_TM_ACTIVE(target->thread.regs->msr)) - return -ENODATA; - - flush_tmregs_to_thread(target); - flush_fp_to_thread(target); - flush_altivec_to_thread(target); - - ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, - &target->thread.ckpt_regs, - 0, PT_MSR * sizeof(reg)); - - if (!ret && count > 0) { - ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, ®, - PT_MSR * sizeof(reg), - (PT_MSR + 1) * sizeof(reg)); - if (!ret) - ret = set_user_ckpt_msr(target, reg); - } - - BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) != - offsetof(struct pt_regs, msr) + sizeof(long)); - - if (!ret) - ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, - &target->thread.ckpt_regs.orig_gpr3, - PT_ORIG_R3 * sizeof(reg), - (PT_MAX_PUT_REG + 1) * sizeof(reg)); - - if (PT_MAX_PUT_REG + 1 < PT_TRAP && !ret) - ret = user_regset_copyin_ignore( - &pos, &count, &kbuf, &ubuf, - (PT_MAX_PUT_REG + 1) * sizeof(reg), - PT_TRAP * sizeof(reg)); - - if (!ret && count > 0) { - ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, ®, - PT_TRAP * sizeof(reg), - (PT_TRAP + 1) * sizeof(reg)); - if (!ret) - ret = set_user_ckpt_trap(target, reg); - } - - if (!ret) - ret = user_regset_copyin_ignore( - &pos, &count, &kbuf, &ubuf, - (PT_TRAP + 1) * sizeof(reg), -1); - - return ret; -} - -/** - * tm_cfpr_active - get active number of registers in CFPR - * @target: The target task. - * @regset: The user regset structure. - * - * This function checks for the active number of available - * regisers in transaction checkpointed FPR category. - */ -static int tm_cfpr_active(struct task_struct *target, - const struct user_regset *regset) -{ - if (!cpu_has_feature(CPU_FTR_TM)) - return -ENODEV; - - if (!MSR_TM_ACTIVE(target->thread.regs->msr)) - return 0; - - return regset->n; -} - -/** - * tm_cfpr_get - get CFPR registers - * @target: The target task. - * @regset: The user regset structure. - * @pos: The buffer position. - * @count: Number of bytes to copy. - * @kbuf: Kernel buffer to copy from. - * @ubuf: User buffer to copy into. - * - * This function gets in transaction checkpointed FPR registers. - * - * When the transaction is active 'ckfp_state' holds the checkpointed - * values for the current transaction to fall back on if it aborts - * in between. This function gets those checkpointed FPR registers. - * The userspace interface buffer layout is as follows. - * - * struct data { - * u64 fpr[32]; - * u64 fpscr; - *}; - */ -static int tm_cfpr_get(struct task_struct *target, - const struct user_regset *regset, - unsigned int pos, unsigned int count, - void *kbuf, void __user *ubuf) -{ - u64 buf[33]; - int i; - - if (!cpu_has_feature(CPU_FTR_TM)) - return -ENODEV; - - if (!MSR_TM_ACTIVE(target->thread.regs->msr)) - return -ENODATA; - - flush_tmregs_to_thread(target); - flush_fp_to_thread(target); - flush_altivec_to_thread(target); - - /* copy to local buffer then write that out */ - for (i = 0; i < 32 ; i++) - buf[i] = target->thread.TS_CKFPR(i); - buf[32] = target->thread.ckfp_state.fpscr; - return user_regset_copyout(&pos, &count, &kbuf, &ubuf, buf, 0, -1); -} - -/** - * tm_cfpr_set - set CFPR registers - * @target: The target task. - * @regset: The user regset structure. - * @pos: The buffer position. - * @count: Number of bytes to copy. - * @kbuf: Kernel buffer to copy into. - * @ubuf: User buffer to copy from. - * - * This function sets in transaction checkpointed FPR registers. - * - * When the transaction is active 'ckfp_state' holds the checkpointed - * FPR register values for the current transaction to fall back on - * if it aborts in between. This function sets these checkpointed - * FPR registers. The userspace interface buffer layout is as follows. - * - * struct data { - * u64 fpr[32]; - * u64 fpscr; - *}; - */ -static int tm_cfpr_set(struct task_struct *target, - const struct user_regset *regset, - unsigned int pos, unsigned int count, - const void *kbuf, const void __user *ubuf) -{ - u64 buf[33]; - int i; - - if (!cpu_has_feature(CPU_FTR_TM)) - return -ENODEV; - - if (!MSR_TM_ACTIVE(target->thread.regs->msr)) - return -ENODATA; - - flush_tmregs_to_thread(target); - flush_fp_to_thread(target); - flush_altivec_to_thread(target); - - for (i = 0; i < 32; i++) - buf[i] = target->thread.TS_CKFPR(i); - buf[32] = target->thread.ckfp_state.fpscr; - - /* copy to local buffer then write that out */ - i = user_regset_copyin(&pos, &count, &kbuf, &ubuf, buf, 0, -1); - if (i) - return i; - for (i = 0; i < 32 ; i++) - target->thread.TS_CKFPR(i) = buf[i]; - target->thread.ckfp_state.fpscr = buf[32]; - return 0; -} - -/** - * tm_cvmx_active - get active number of registers in CVMX - * @target: The target task. - * @regset: The user regset structure. - * - * This function checks for the active number of available - * regisers in checkpointed VMX category. - */ -static int tm_cvmx_active(struct task_struct *target, - const struct user_regset *regset) -{ - if (!cpu_has_feature(CPU_FTR_TM)) - return -ENODEV; - - if (!MSR_TM_ACTIVE(target->thread.regs->msr)) - return 0; - - return regset->n; -} - -/** - * tm_cvmx_get - get CMVX registers - * @target: The target task. - * @regset: The user regset structure. - * @pos: The buffer position. - * @count: Number of bytes to copy. - * @kbuf: Kernel buffer to copy from. - * @ubuf: User buffer to copy into. - * - * This function gets in transaction checkpointed VMX registers. - * - * When the transaction is active 'ckvr_state' and 'ckvrsave' hold - * the checkpointed values for the current transaction to fall - * back on if it aborts in between. The userspace interface buffer - * layout is as follows. - * - * struct data { - * vector128 vr[32]; - * vector128 vscr; - * vector128 vrsave; - *}; - */ -static int tm_cvmx_get(struct task_struct *target, - const struct user_regset *regset, - unsigned int pos, unsigned int count, - void *kbuf, void __user *ubuf) -{ - int ret; - - BUILD_BUG_ON(TVSO(vscr) != TVSO(vr[32])); - - if (!cpu_has_feature(CPU_FTR_TM)) - return -ENODEV; - - if (!MSR_TM_ACTIVE(target->thread.regs->msr)) - return -ENODATA; - - /* Flush the state */ - flush_tmregs_to_thread(target); - flush_fp_to_thread(target); - flush_altivec_to_thread(target); - - ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, - &target->thread.ckvr_state, 0, - 33 * sizeof(vector128)); - if (!ret) { - /* - * Copy out only the low-order word of vrsave. - */ - union { - elf_vrreg_t reg; - u32 word; - } vrsave; - memset(&vrsave, 0, sizeof(vrsave)); - vrsave.word = target->thread.ckvrsave; - ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &vrsave, - 33 * sizeof(vector128), -1); - } - - return ret; -} - -/** - * tm_cvmx_set - set CMVX registers - * @target: The target task. - * @regset: The user regset structure. - * @pos: The buffer position. - * @count: Number of bytes to copy. - * @kbuf: Kernel buffer to copy into. - * @ubuf: User buffer to copy from. - * - * This function sets in transaction checkpointed VMX registers. - * - * When the transaction is active 'ckvr_state' and 'ckvrsave' hold - * the checkpointed values for the current transaction to fall - * back on if it aborts in between. The userspace interface buffer - * layout is as follows. - * - * struct data { - * vector128 vr[32]; - * vector128 vscr; - * vector128 vrsave; - *}; - */ -static int tm_cvmx_set(struct task_struct *target, - const struct user_regset *regset, - unsigned int pos, unsigned int count, - const void *kbuf, const void __user *ubuf) -{ - int ret; - - BUILD_BUG_ON(TVSO(vscr) != TVSO(vr[32])); - - if (!cpu_has_feature(CPU_FTR_TM)) - return -ENODEV; - - if (!MSR_TM_ACTIVE(target->thread.regs->msr)) - return -ENODATA; - - flush_tmregs_to_thread(target); - flush_fp_to_thread(target); - flush_altivec_to_thread(target); - - ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, - &target->thread.ckvr_state, 0, - 33 * sizeof(vector128)); - if (!ret && count > 0) { - /* - * We use only the low-order word of vrsave. - */ - union { - elf_vrreg_t reg; - u32 word; - } vrsave; - memset(&vrsave, 0, sizeof(vrsave)); - vrsave.word = target->thread.ckvrsave; - ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &vrsave, - 33 * sizeof(vector128), -1); - if (!ret) - target->thread.ckvrsave = vrsave.word; - } - - return ret; -} - -/** - * tm_cvsx_active - get active number of registers in CVSX - * @target: The target task. - * @regset: The user regset structure. - * - * This function checks for the active number of available - * regisers in transaction checkpointed VSX category. - */ -static int tm_cvsx_active(struct task_struct *target, - const struct user_regset *regset) -{ - if (!cpu_has_feature(CPU_FTR_TM)) - return -ENODEV; - - if (!MSR_TM_ACTIVE(target->thread.regs->msr)) - return 0; - - flush_vsx_to_thread(target); - return target->thread.used_vsr ? regset->n : 0; -} - -/** - * tm_cvsx_get - get CVSX registers - * @target: The target task. - * @regset: The user regset structure. - * @pos: The buffer position. - * @count: Number of bytes to copy. - * @kbuf: Kernel buffer to copy from. - * @ubuf: User buffer to copy into. - * - * This function gets in transaction checkpointed VSX registers. - * - * When the transaction is active 'ckfp_state' holds the checkpointed - * values for the current transaction to fall back on if it aborts - * in between. This function gets those checkpointed VSX registers. - * The userspace interface buffer layout is as follows. - * - * struct data { - * u64 vsx[32]; - *}; - */ -static int tm_cvsx_get(struct task_struct *target, - const struct user_regset *regset, - unsigned int pos, unsigned int count, - void *kbuf, void __user *ubuf) -{ - u64 buf[32]; - int ret, i; - - if (!cpu_has_feature(CPU_FTR_TM)) - return -ENODEV; - - if (!MSR_TM_ACTIVE(target->thread.regs->msr)) - return -ENODATA; - - /* Flush the state */ - flush_tmregs_to_thread(target); - flush_fp_to_thread(target); - flush_altivec_to_thread(target); - flush_vsx_to_thread(target); - - for (i = 0; i < 32 ; i++) - buf[i] = target->thread.ckfp_state.fpr[i][TS_VSRLOWOFFSET]; - ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, - buf, 0, 32 * sizeof(double)); - - return ret; -} - -/** - * tm_cvsx_set - set CFPR registers - * @target: The target task. - * @regset: The user regset structure. - * @pos: The buffer position. - * @count: Number of bytes to copy. - * @kbuf: Kernel buffer to copy into. - * @ubuf: User buffer to copy from. - * - * This function sets in transaction checkpointed VSX registers. - * - * When the transaction is active 'ckfp_state' holds the checkpointed - * VSX register values for the current transaction to fall back on - * if it aborts in between. This function sets these checkpointed - * FPR registers. The userspace interface buffer layout is as follows. - * - * struct data { - * u64 vsx[32]; - *}; - */ -static int tm_cvsx_set(struct task_struct *target, - const struct user_regset *regset, - unsigned int pos, unsigned int count, - const void *kbuf, const void __user *ubuf) -{ - u64 buf[32]; - int ret, i; - - if (!cpu_has_feature(CPU_FTR_TM)) - return -ENODEV; - - if (!MSR_TM_ACTIVE(target->thread.regs->msr)) - return -ENODATA; - - /* Flush the state */ - flush_tmregs_to_thread(target); - flush_fp_to_thread(target); - flush_altivec_to_thread(target); - flush_vsx_to_thread(target); - - for (i = 0; i < 32 ; i++) - buf[i] = target->thread.ckfp_state.fpr[i][TS_VSRLOWOFFSET]; - - ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, - buf, 0, 32 * sizeof(double)); - if (!ret) - for (i = 0; i < 32 ; i++) - target->thread.ckfp_state.fpr[i][TS_VSRLOWOFFSET] = buf[i]; - - return ret; -} - -/** - * tm_spr_active - get active number of registers in TM SPR - * @target: The target task. - * @regset: The user regset structure. - * - * This function checks the active number of available - * regisers in the transactional memory SPR category. - */ -static int tm_spr_active(struct task_struct *target, - const struct user_regset *regset) -{ - if (!cpu_has_feature(CPU_FTR_TM)) - return -ENODEV; - - return regset->n; -} - -/** - * tm_spr_get - get the TM related SPR registers - * @target: The target task. - * @regset: The user regset structure. - * @pos: The buffer position. - * @count: Number of bytes to copy. - * @kbuf: Kernel buffer to copy from. - * @ubuf: User buffer to copy into. - * - * This function gets transactional memory related SPR registers. - * The userspace interface buffer layout is as follows. - * - * struct { - * u64 tm_tfhar; - * u64 tm_texasr; - * u64 tm_tfiar; - * }; - */ -static int tm_spr_get(struct task_struct *target, - const struct user_regset *regset, - unsigned int pos, unsigned int count, - void *kbuf, void __user *ubuf) -{ - int ret; - - /* Build tests */ - BUILD_BUG_ON(TSO(tm_tfhar) + sizeof(u64) != TSO(tm_texasr)); - BUILD_BUG_ON(TSO(tm_texasr) + sizeof(u64) != TSO(tm_tfiar)); - BUILD_BUG_ON(TSO(tm_tfiar) + sizeof(u64) != TSO(ckpt_regs)); - - if (!cpu_has_feature(CPU_FTR_TM)) - return -ENODEV; - - /* Flush the states */ - flush_tmregs_to_thread(target); - flush_fp_to_thread(target); - flush_altivec_to_thread(target); - - /* TFHAR register */ - ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, - &target->thread.tm_tfhar, 0, sizeof(u64)); - - /* TEXASR register */ - if (!ret) - ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, - &target->thread.tm_texasr, sizeof(u64), - 2 * sizeof(u64)); - - /* TFIAR register */ - if (!ret) - ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, - &target->thread.tm_tfiar, - 2 * sizeof(u64), 3 * sizeof(u64)); - return ret; -} - -/** - * tm_spr_set - set the TM related SPR registers - * @target: The target task. - * @regset: The user regset structure. - * @pos: The buffer position. - * @count: Number of bytes to copy. - * @kbuf: Kernel buffer to copy into. - * @ubuf: User buffer to copy from. - * - * This function sets transactional memory related SPR registers. - * The userspace interface buffer layout is as follows. - * - * struct { - * u64 tm_tfhar; - * u64 tm_texasr; - * u64 tm_tfiar; - * }; - */ -static int tm_spr_set(struct task_struct *target, - const struct user_regset *regset, - unsigned int pos, unsigned int count, - const void *kbuf, const void __user *ubuf) -{ - int ret; - - /* Build tests */ - BUILD_BUG_ON(TSO(tm_tfhar) + sizeof(u64) != TSO(tm_texasr)); - BUILD_BUG_ON(TSO(tm_texasr) + sizeof(u64) != TSO(tm_tfiar)); - BUILD_BUG_ON(TSO(tm_tfiar) + sizeof(u64) != TSO(ckpt_regs)); - - if (!cpu_has_feature(CPU_FTR_TM)) - return -ENODEV; - - /* Flush the states */ - flush_tmregs_to_thread(target); - flush_fp_to_thread(target); - flush_altivec_to_thread(target); - - /* TFHAR register */ - ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, - &target->thread.tm_tfhar, 0, sizeof(u64)); - - /* TEXASR register */ - if (!ret) - ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, - &target->thread.tm_texasr, sizeof(u64), - 2 * sizeof(u64)); - - /* TFIAR register */ - if (!ret) - ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, - &target->thread.tm_tfiar, - 2 * sizeof(u64), 3 * sizeof(u64)); - return ret; -} - -static int tm_tar_active(struct task_struct *target, - const struct user_regset *regset) -{ - if (!cpu_has_feature(CPU_FTR_TM)) - return -ENODEV; - - if (MSR_TM_ACTIVE(target->thread.regs->msr)) - return regset->n; - - return 0; -} - -static int tm_tar_get(struct task_struct *target, - const struct user_regset *regset, - unsigned int pos, unsigned int count, - void *kbuf, void __user *ubuf) -{ - int ret; - - if (!cpu_has_feature(CPU_FTR_TM)) - return -ENODEV; - - if (!MSR_TM_ACTIVE(target->thread.regs->msr)) - return -ENODATA; - - ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, - &target->thread.tm_tar, 0, sizeof(u64)); - return ret; -} - -static int tm_tar_set(struct task_struct *target, - const struct user_regset *regset, - unsigned int pos, unsigned int count, - const void *kbuf, const void __user *ubuf) -{ - int ret; - - if (!cpu_has_feature(CPU_FTR_TM)) - return -ENODEV; - - if (!MSR_TM_ACTIVE(target->thread.regs->msr)) - return -ENODATA; - - ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, - &target->thread.tm_tar, 0, sizeof(u64)); - return ret; -} - -static int tm_ppr_active(struct task_struct *target, - const struct user_regset *regset) -{ - if (!cpu_has_feature(CPU_FTR_TM)) - return -ENODEV; - - if (MSR_TM_ACTIVE(target->thread.regs->msr)) - return regset->n; - - return 0; -} - - -static int tm_ppr_get(struct task_struct *target, - const struct user_regset *regset, - unsigned int pos, unsigned int count, - void *kbuf, void __user *ubuf) -{ - int ret; - - if (!cpu_has_feature(CPU_FTR_TM)) - return -ENODEV; - - if (!MSR_TM_ACTIVE(target->thread.regs->msr)) - return -ENODATA; - - ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, - &target->thread.tm_ppr, 0, sizeof(u64)); - return ret; -} - -static int tm_ppr_set(struct task_struct *target, - const struct user_regset *regset, - unsigned int pos, unsigned int count, - const void *kbuf, const void __user *ubuf) -{ - int ret; - - if (!cpu_has_feature(CPU_FTR_TM)) - return -ENODEV; - - if (!MSR_TM_ACTIVE(target->thread.regs->msr)) - return -ENODATA; - - ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, - &target->thread.tm_ppr, 0, sizeof(u64)); - return ret; -} - -static int tm_dscr_active(struct task_struct *target, - const struct user_regset *regset) -{ - if (!cpu_has_feature(CPU_FTR_TM)) - return -ENODEV; - - if (MSR_TM_ACTIVE(target->thread.regs->msr)) - return regset->n; - - return 0; -} - -static int tm_dscr_get(struct task_struct *target, - const struct user_regset *regset, - unsigned int pos, unsigned int count, - void *kbuf, void __user *ubuf) -{ - int ret; - - if (!cpu_has_feature(CPU_FTR_TM)) - return -ENODEV; - - if (!MSR_TM_ACTIVE(target->thread.regs->msr)) - return -ENODATA; - - ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, - &target->thread.tm_dscr, 0, sizeof(u64)); - return ret; -} - -static int tm_dscr_set(struct task_struct *target, - const struct user_regset *regset, - unsigned int pos, unsigned int count, - const void *kbuf, const void __user *ubuf) -{ - int ret; - - if (!cpu_has_feature(CPU_FTR_TM)) - return -ENODEV; - - if (!MSR_TM_ACTIVE(target->thread.regs->msr)) - return -ENODATA; - - ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, - &target->thread.tm_dscr, 0, sizeof(u64)); - return ret; -} -#endif /* CONFIG_PPC_TRANSACTIONAL_MEM */ - #ifdef CONFIG_PPC64 static int ppr_get(struct task_struct *target, const struct user_regset *regset, @@ -1629,7 +737,7 @@ static const struct user_regset_view user_ppc_native_view = { #include -static int gpr32_get_common(struct task_struct *target, +int gpr32_get_common(struct task_struct *target, const struct user_regset *regset, unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf, @@ -1676,7 +784,7 @@ static int gpr32_get_common(struct task_struct *target, PT_REGS_COUNT * sizeof(reg), -1); } -static int gpr32_set_common(struct task_struct *target, +int gpr32_set_common(struct task_struct *target, const struct user_regset *regset, unsigned int pos, unsigned int count, const void *kbuf, const void __user *ubuf, @@ -1744,26 +852,6 @@ static int gpr32_set_common(struct task_struct *target, (PT_TRAP + 1) * sizeof(reg), -1); } -#ifdef CONFIG_PPC_TRANSACTIONAL_MEM -static int tm_cgpr32_get(struct task_struct *target, - const struct user_regset *regset, - unsigned int pos, unsigned int count, - void *kbuf, void __user *ubuf) -{ - return gpr32_get_common(target, regset, pos, count, kbuf, ubuf, - &target->thread.ckpt_regs.gpr[0]); -} - -static int tm_cgpr32_set(struct task_struct *target, - const struct user_regset *regset, - unsigned int pos, unsigned int count, - const void *kbuf, const void __user *ubuf) -{ - return gpr32_set_common(target, regset, pos, count, kbuf, ubuf, - &target->thread.ckpt_regs.gpr[0]); -} -#endif /* CONFIG_PPC_TRANSACTIONAL_MEM */ - static int gpr32_get(struct task_struct *target, const struct user_regset *regset, unsigned int pos, unsigned int count, -- 2.25.0