forked from luck/tmp_suning_uos_patched
b24413180f
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
710 lines
18 KiB
C
710 lines
18 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* unaligned.c: Unaligned load/store trap handling with special
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* cases for the kernel to do them more quickly.
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*
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* Copyright (C) 1996,2008 David S. Miller (davem@davemloft.net)
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* Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
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*/
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#include <linux/jiffies.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/extable.h>
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#include <asm/asi.h>
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#include <asm/ptrace.h>
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#include <asm/pstate.h>
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#include <asm/processor.h>
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#include <linux/uaccess.h>
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#include <linux/smp.h>
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#include <linux/bitops.h>
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#include <linux/perf_event.h>
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#include <linux/ratelimit.h>
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#include <linux/context_tracking.h>
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#include <asm/fpumacro.h>
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#include <asm/cacheflush.h>
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#include <asm/setup.h>
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#include "entry.h"
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#include "kernel.h"
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enum direction {
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load, /* ld, ldd, ldh, ldsh */
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store, /* st, std, sth, stsh */
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both, /* Swap, ldstub, cas, ... */
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fpld,
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fpst,
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invalid,
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};
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static inline enum direction decode_direction(unsigned int insn)
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{
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unsigned long tmp = (insn >> 21) & 1;
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if (!tmp)
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return load;
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else {
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switch ((insn>>19)&0xf) {
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case 15: /* swap* */
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return both;
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default:
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return store;
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}
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}
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}
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/* 16 = double-word, 8 = extra-word, 4 = word, 2 = half-word */
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static inline int decode_access_size(struct pt_regs *regs, unsigned int insn)
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{
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unsigned int tmp;
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tmp = ((insn >> 19) & 0xf);
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if (tmp == 11 || tmp == 14) /* ldx/stx */
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return 8;
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tmp &= 3;
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if (!tmp)
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return 4;
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else if (tmp == 3)
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return 16; /* ldd/std - Although it is actually 8 */
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else if (tmp == 2)
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return 2;
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else {
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printk("Impossible unaligned trap. insn=%08x\n", insn);
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die_if_kernel("Byte sized unaligned access?!?!", regs);
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/* GCC should never warn that control reaches the end
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* of this function without returning a value because
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* die_if_kernel() is marked with attribute 'noreturn'.
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* Alas, some versions do...
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*/
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return 0;
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}
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}
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static inline int decode_asi(unsigned int insn, struct pt_regs *regs)
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{
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if (insn & 0x800000) {
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if (insn & 0x2000)
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return (unsigned char)(regs->tstate >> 24); /* %asi */
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else
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return (unsigned char)(insn >> 5); /* imm_asi */
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} else
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return ASI_P;
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}
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/* 0x400000 = signed, 0 = unsigned */
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static inline int decode_signedness(unsigned int insn)
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{
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return (insn & 0x400000);
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}
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static inline void maybe_flush_windows(unsigned int rs1, unsigned int rs2,
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unsigned int rd, int from_kernel)
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{
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if (rs2 >= 16 || rs1 >= 16 || rd >= 16) {
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if (from_kernel != 0)
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__asm__ __volatile__("flushw");
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else
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flushw_user();
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}
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}
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static inline long sign_extend_imm13(long imm)
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{
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return imm << 51 >> 51;
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}
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static unsigned long fetch_reg(unsigned int reg, struct pt_regs *regs)
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{
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unsigned long value, fp;
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if (reg < 16)
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return (!reg ? 0 : regs->u_regs[reg]);
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fp = regs->u_regs[UREG_FP];
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if (regs->tstate & TSTATE_PRIV) {
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struct reg_window *win;
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win = (struct reg_window *)(fp + STACK_BIAS);
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value = win->locals[reg - 16];
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} else if (!test_thread_64bit_stack(fp)) {
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struct reg_window32 __user *win32;
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win32 = (struct reg_window32 __user *)((unsigned long)((u32)fp));
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get_user(value, &win32->locals[reg - 16]);
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} else {
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struct reg_window __user *win;
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win = (struct reg_window __user *)(fp + STACK_BIAS);
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get_user(value, &win->locals[reg - 16]);
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}
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return value;
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}
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static unsigned long *fetch_reg_addr(unsigned int reg, struct pt_regs *regs)
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{
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unsigned long fp;
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if (reg < 16)
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return ®s->u_regs[reg];
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fp = regs->u_regs[UREG_FP];
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if (regs->tstate & TSTATE_PRIV) {
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struct reg_window *win;
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win = (struct reg_window *)(fp + STACK_BIAS);
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return &win->locals[reg - 16];
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} else if (!test_thread_64bit_stack(fp)) {
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struct reg_window32 *win32;
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win32 = (struct reg_window32 *)((unsigned long)((u32)fp));
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return (unsigned long *)&win32->locals[reg - 16];
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} else {
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struct reg_window *win;
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win = (struct reg_window *)(fp + STACK_BIAS);
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return &win->locals[reg - 16];
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}
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}
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unsigned long compute_effective_address(struct pt_regs *regs,
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unsigned int insn, unsigned int rd)
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{
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int from_kernel = (regs->tstate & TSTATE_PRIV) != 0;
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unsigned int rs1 = (insn >> 14) & 0x1f;
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unsigned int rs2 = insn & 0x1f;
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unsigned long addr;
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if (insn & 0x2000) {
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maybe_flush_windows(rs1, 0, rd, from_kernel);
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addr = (fetch_reg(rs1, regs) + sign_extend_imm13(insn));
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} else {
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maybe_flush_windows(rs1, rs2, rd, from_kernel);
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addr = (fetch_reg(rs1, regs) + fetch_reg(rs2, regs));
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}
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if (!from_kernel && test_thread_flag(TIF_32BIT))
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addr &= 0xffffffff;
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return addr;
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}
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/* This is just to make gcc think die_if_kernel does return... */
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static void __used unaligned_panic(char *str, struct pt_regs *regs)
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{
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die_if_kernel(str, regs);
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}
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extern int do_int_load(unsigned long *dest_reg, int size,
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unsigned long *saddr, int is_signed, int asi);
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extern int __do_int_store(unsigned long *dst_addr, int size,
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unsigned long src_val, int asi);
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static inline int do_int_store(int reg_num, int size, unsigned long *dst_addr,
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struct pt_regs *regs, int asi, int orig_asi)
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{
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unsigned long zero = 0;
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unsigned long *src_val_p = &zero;
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unsigned long src_val;
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if (size == 16) {
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size = 8;
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zero = (((long)(reg_num ?
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(unsigned int)fetch_reg(reg_num, regs) : 0)) << 32) |
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(unsigned int)fetch_reg(reg_num + 1, regs);
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} else if (reg_num) {
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src_val_p = fetch_reg_addr(reg_num, regs);
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}
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src_val = *src_val_p;
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if (unlikely(asi != orig_asi)) {
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switch (size) {
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case 2:
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src_val = swab16(src_val);
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break;
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case 4:
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src_val = swab32(src_val);
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break;
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case 8:
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src_val = swab64(src_val);
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break;
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case 16:
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default:
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BUG();
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break;
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}
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}
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return __do_int_store(dst_addr, size, src_val, asi);
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}
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static inline void advance(struct pt_regs *regs)
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{
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regs->tpc = regs->tnpc;
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regs->tnpc += 4;
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if (test_thread_flag(TIF_32BIT)) {
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regs->tpc &= 0xffffffff;
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regs->tnpc &= 0xffffffff;
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}
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}
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static inline int floating_point_load_or_store_p(unsigned int insn)
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{
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return (insn >> 24) & 1;
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}
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static inline int ok_for_kernel(unsigned int insn)
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{
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return !floating_point_load_or_store_p(insn);
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}
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static void kernel_mna_trap_fault(int fixup_tstate_asi)
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{
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struct pt_regs *regs = current_thread_info()->kern_una_regs;
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unsigned int insn = current_thread_info()->kern_una_insn;
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const struct exception_table_entry *entry;
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entry = search_exception_tables(regs->tpc);
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if (!entry) {
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unsigned long address;
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address = compute_effective_address(regs, insn,
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((insn >> 25) & 0x1f));
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if (address < PAGE_SIZE) {
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printk(KERN_ALERT "Unable to handle kernel NULL "
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"pointer dereference in mna handler");
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} else
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printk(KERN_ALERT "Unable to handle kernel paging "
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"request in mna handler");
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printk(KERN_ALERT " at virtual address %016lx\n",address);
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printk(KERN_ALERT "current->{active_,}mm->context = %016lx\n",
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(current->mm ? CTX_HWBITS(current->mm->context) :
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CTX_HWBITS(current->active_mm->context)));
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printk(KERN_ALERT "current->{active_,}mm->pgd = %016lx\n",
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(current->mm ? (unsigned long) current->mm->pgd :
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(unsigned long) current->active_mm->pgd));
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die_if_kernel("Oops", regs);
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/* Not reached */
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}
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regs->tpc = entry->fixup;
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regs->tnpc = regs->tpc + 4;
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if (fixup_tstate_asi) {
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regs->tstate &= ~TSTATE_ASI;
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regs->tstate |= (ASI_AIUS << 24UL);
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}
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}
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static void log_unaligned(struct pt_regs *regs)
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{
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static DEFINE_RATELIMIT_STATE(ratelimit, 5 * HZ, 5);
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if (__ratelimit(&ratelimit)) {
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printk("Kernel unaligned access at TPC[%lx] %pS\n",
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regs->tpc, (void *) regs->tpc);
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}
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}
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asmlinkage void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn)
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{
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enum direction dir = decode_direction(insn);
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int size = decode_access_size(regs, insn);
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int orig_asi, asi;
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current_thread_info()->kern_una_regs = regs;
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current_thread_info()->kern_una_insn = insn;
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orig_asi = asi = decode_asi(insn, regs);
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/* If this is a {get,put}_user() on an unaligned userspace pointer,
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* just signal a fault and do not log the event.
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*/
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if (asi == ASI_AIUS) {
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kernel_mna_trap_fault(0);
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return;
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}
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log_unaligned(regs);
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if (!ok_for_kernel(insn) || dir == both) {
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printk("Unsupported unaligned load/store trap for kernel "
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"at <%016lx>.\n", regs->tpc);
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unaligned_panic("Kernel does fpu/atomic "
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"unaligned load/store.", regs);
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kernel_mna_trap_fault(0);
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} else {
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unsigned long addr, *reg_addr;
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int err;
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addr = compute_effective_address(regs, insn,
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((insn >> 25) & 0x1f));
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perf_sw_event(PERF_COUNT_SW_ALIGNMENT_FAULTS, 1, regs, addr);
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switch (asi) {
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case ASI_NL:
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case ASI_AIUPL:
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case ASI_AIUSL:
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case ASI_PL:
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case ASI_SL:
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case ASI_PNFL:
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case ASI_SNFL:
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asi &= ~0x08;
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break;
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}
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switch (dir) {
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case load:
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reg_addr = fetch_reg_addr(((insn>>25)&0x1f), regs);
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err = do_int_load(reg_addr, size,
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(unsigned long *) addr,
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decode_signedness(insn), asi);
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if (likely(!err) && unlikely(asi != orig_asi)) {
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unsigned long val_in = *reg_addr;
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switch (size) {
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case 2:
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val_in = swab16(val_in);
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break;
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case 4:
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val_in = swab32(val_in);
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break;
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case 8:
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val_in = swab64(val_in);
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break;
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case 16:
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default:
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BUG();
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break;
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}
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*reg_addr = val_in;
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}
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break;
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case store:
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err = do_int_store(((insn>>25)&0x1f), size,
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(unsigned long *) addr, regs,
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asi, orig_asi);
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break;
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default:
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panic("Impossible kernel unaligned trap.");
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/* Not reached... */
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}
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if (unlikely(err))
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kernel_mna_trap_fault(1);
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else
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advance(regs);
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}
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}
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int handle_popc(u32 insn, struct pt_regs *regs)
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{
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int from_kernel = (regs->tstate & TSTATE_PRIV) != 0;
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int ret, rd = ((insn >> 25) & 0x1f);
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u64 value;
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perf_sw_event(PERF_COUNT_SW_EMULATION_FAULTS, 1, regs, 0);
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if (insn & 0x2000) {
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maybe_flush_windows(0, 0, rd, from_kernel);
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value = sign_extend_imm13(insn);
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} else {
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maybe_flush_windows(0, insn & 0x1f, rd, from_kernel);
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value = fetch_reg(insn & 0x1f, regs);
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}
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ret = hweight64(value);
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if (rd < 16) {
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if (rd)
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regs->u_regs[rd] = ret;
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} else {
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unsigned long fp = regs->u_regs[UREG_FP];
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if (!test_thread_64bit_stack(fp)) {
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struct reg_window32 __user *win32;
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win32 = (struct reg_window32 __user *)((unsigned long)((u32)fp));
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put_user(ret, &win32->locals[rd - 16]);
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} else {
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struct reg_window __user *win;
|
|
win = (struct reg_window __user *)(fp + STACK_BIAS);
|
|
put_user(ret, &win->locals[rd - 16]);
|
|
}
|
|
}
|
|
advance(regs);
|
|
return 1;
|
|
}
|
|
|
|
extern void do_fpother(struct pt_regs *regs);
|
|
extern void do_privact(struct pt_regs *regs);
|
|
extern void sun4v_data_access_exception(struct pt_regs *regs,
|
|
unsigned long addr,
|
|
unsigned long type_ctx);
|
|
|
|
int handle_ldf_stq(u32 insn, struct pt_regs *regs)
|
|
{
|
|
unsigned long addr = compute_effective_address(regs, insn, 0);
|
|
int freg;
|
|
struct fpustate *f = FPUSTATE;
|
|
int asi = decode_asi(insn, regs);
|
|
int flag;
|
|
|
|
perf_sw_event(PERF_COUNT_SW_EMULATION_FAULTS, 1, regs, 0);
|
|
|
|
save_and_clear_fpu();
|
|
current_thread_info()->xfsr[0] &= ~0x1c000;
|
|
if (insn & 0x200000) {
|
|
/* STQ */
|
|
u64 first = 0, second = 0;
|
|
|
|
freg = ((insn >> 25) & 0x1e) | ((insn >> 20) & 0x20);
|
|
flag = (freg < 32) ? FPRS_DL : FPRS_DU;
|
|
if (freg & 3) {
|
|
current_thread_info()->xfsr[0] |= (6 << 14) /* invalid_fp_register */;
|
|
do_fpother(regs);
|
|
return 0;
|
|
}
|
|
if (current_thread_info()->fpsaved[0] & flag) {
|
|
first = *(u64 *)&f->regs[freg];
|
|
second = *(u64 *)&f->regs[freg+2];
|
|
}
|
|
if (asi < 0x80) {
|
|
do_privact(regs);
|
|
return 1;
|
|
}
|
|
switch (asi) {
|
|
case ASI_P:
|
|
case ASI_S: break;
|
|
case ASI_PL:
|
|
case ASI_SL:
|
|
{
|
|
/* Need to convert endians */
|
|
u64 tmp = __swab64p(&first);
|
|
|
|
first = __swab64p(&second);
|
|
second = tmp;
|
|
break;
|
|
}
|
|
default:
|
|
if (tlb_type == hypervisor)
|
|
sun4v_data_access_exception(regs, addr, 0);
|
|
else
|
|
spitfire_data_access_exception(regs, 0, addr);
|
|
return 1;
|
|
}
|
|
if (put_user (first >> 32, (u32 __user *)addr) ||
|
|
__put_user ((u32)first, (u32 __user *)(addr + 4)) ||
|
|
__put_user (second >> 32, (u32 __user *)(addr + 8)) ||
|
|
__put_user ((u32)second, (u32 __user *)(addr + 12))) {
|
|
if (tlb_type == hypervisor)
|
|
sun4v_data_access_exception(regs, addr, 0);
|
|
else
|
|
spitfire_data_access_exception(regs, 0, addr);
|
|
return 1;
|
|
}
|
|
} else {
|
|
/* LDF, LDDF, LDQF */
|
|
u32 data[4] __attribute__ ((aligned(8)));
|
|
int size, i;
|
|
int err;
|
|
|
|
if (asi < 0x80) {
|
|
do_privact(regs);
|
|
return 1;
|
|
} else if (asi > ASI_SNFL) {
|
|
if (tlb_type == hypervisor)
|
|
sun4v_data_access_exception(regs, addr, 0);
|
|
else
|
|
spitfire_data_access_exception(regs, 0, addr);
|
|
return 1;
|
|
}
|
|
switch (insn & 0x180000) {
|
|
case 0x000000: size = 1; break;
|
|
case 0x100000: size = 4; break;
|
|
default: size = 2; break;
|
|
}
|
|
if (size == 1)
|
|
freg = (insn >> 25) & 0x1f;
|
|
else
|
|
freg = ((insn >> 25) & 0x1e) | ((insn >> 20) & 0x20);
|
|
flag = (freg < 32) ? FPRS_DL : FPRS_DU;
|
|
|
|
for (i = 0; i < size; i++)
|
|
data[i] = 0;
|
|
|
|
err = get_user (data[0], (u32 __user *) addr);
|
|
if (!err) {
|
|
for (i = 1; i < size; i++)
|
|
err |= __get_user (data[i], (u32 __user *)(addr + 4*i));
|
|
}
|
|
if (err && !(asi & 0x2 /* NF */)) {
|
|
if (tlb_type == hypervisor)
|
|
sun4v_data_access_exception(regs, addr, 0);
|
|
else
|
|
spitfire_data_access_exception(regs, 0, addr);
|
|
return 1;
|
|
}
|
|
if (asi & 0x8) /* Little */ {
|
|
u64 tmp;
|
|
|
|
switch (size) {
|
|
case 1: data[0] = le32_to_cpup(data + 0); break;
|
|
default:*(u64 *)(data + 0) = le64_to_cpup((u64 *)(data + 0));
|
|
break;
|
|
case 4: tmp = le64_to_cpup((u64 *)(data + 0));
|
|
*(u64 *)(data + 0) = le64_to_cpup((u64 *)(data + 2));
|
|
*(u64 *)(data + 2) = tmp;
|
|
break;
|
|
}
|
|
}
|
|
if (!(current_thread_info()->fpsaved[0] & FPRS_FEF)) {
|
|
current_thread_info()->fpsaved[0] = FPRS_FEF;
|
|
current_thread_info()->gsr[0] = 0;
|
|
}
|
|
if (!(current_thread_info()->fpsaved[0] & flag)) {
|
|
if (freg < 32)
|
|
memset(f->regs, 0, 32*sizeof(u32));
|
|
else
|
|
memset(f->regs+32, 0, 32*sizeof(u32));
|
|
}
|
|
memcpy(f->regs + freg, data, size * 4);
|
|
current_thread_info()->fpsaved[0] |= flag;
|
|
}
|
|
advance(regs);
|
|
return 1;
|
|
}
|
|
|
|
void handle_ld_nf(u32 insn, struct pt_regs *regs)
|
|
{
|
|
int rd = ((insn >> 25) & 0x1f);
|
|
int from_kernel = (regs->tstate & TSTATE_PRIV) != 0;
|
|
unsigned long *reg;
|
|
|
|
perf_sw_event(PERF_COUNT_SW_EMULATION_FAULTS, 1, regs, 0);
|
|
|
|
maybe_flush_windows(0, 0, rd, from_kernel);
|
|
reg = fetch_reg_addr(rd, regs);
|
|
if (from_kernel || rd < 16) {
|
|
reg[0] = 0;
|
|
if ((insn & 0x780000) == 0x180000)
|
|
reg[1] = 0;
|
|
} else if (!test_thread_64bit_stack(regs->u_regs[UREG_FP])) {
|
|
put_user(0, (int __user *) reg);
|
|
if ((insn & 0x780000) == 0x180000)
|
|
put_user(0, ((int __user *) reg) + 1);
|
|
} else {
|
|
put_user(0, (unsigned long __user *) reg);
|
|
if ((insn & 0x780000) == 0x180000)
|
|
put_user(0, (unsigned long __user *) reg + 1);
|
|
}
|
|
advance(regs);
|
|
}
|
|
|
|
void handle_lddfmna(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr)
|
|
{
|
|
enum ctx_state prev_state = exception_enter();
|
|
unsigned long pc = regs->tpc;
|
|
unsigned long tstate = regs->tstate;
|
|
u32 insn;
|
|
u64 value;
|
|
u8 freg;
|
|
int flag;
|
|
struct fpustate *f = FPUSTATE;
|
|
|
|
if (tstate & TSTATE_PRIV)
|
|
die_if_kernel("lddfmna from kernel", regs);
|
|
perf_sw_event(PERF_COUNT_SW_ALIGNMENT_FAULTS, 1, regs, sfar);
|
|
if (test_thread_flag(TIF_32BIT))
|
|
pc = (u32)pc;
|
|
if (get_user(insn, (u32 __user *) pc) != -EFAULT) {
|
|
int asi = decode_asi(insn, regs);
|
|
u32 first, second;
|
|
int err;
|
|
|
|
if ((asi > ASI_SNFL) ||
|
|
(asi < ASI_P))
|
|
goto daex;
|
|
first = second = 0;
|
|
err = get_user(first, (u32 __user *)sfar);
|
|
if (!err)
|
|
err = get_user(second, (u32 __user *)(sfar + 4));
|
|
if (err) {
|
|
if (!(asi & 0x2))
|
|
goto daex;
|
|
first = second = 0;
|
|
}
|
|
save_and_clear_fpu();
|
|
freg = ((insn >> 25) & 0x1e) | ((insn >> 20) & 0x20);
|
|
value = (((u64)first) << 32) | second;
|
|
if (asi & 0x8) /* Little */
|
|
value = __swab64p(&value);
|
|
flag = (freg < 32) ? FPRS_DL : FPRS_DU;
|
|
if (!(current_thread_info()->fpsaved[0] & FPRS_FEF)) {
|
|
current_thread_info()->fpsaved[0] = FPRS_FEF;
|
|
current_thread_info()->gsr[0] = 0;
|
|
}
|
|
if (!(current_thread_info()->fpsaved[0] & flag)) {
|
|
if (freg < 32)
|
|
memset(f->regs, 0, 32*sizeof(u32));
|
|
else
|
|
memset(f->regs+32, 0, 32*sizeof(u32));
|
|
}
|
|
*(u64 *)(f->regs + freg) = value;
|
|
current_thread_info()->fpsaved[0] |= flag;
|
|
} else {
|
|
daex:
|
|
if (tlb_type == hypervisor)
|
|
sun4v_data_access_exception(regs, sfar, sfsr);
|
|
else
|
|
spitfire_data_access_exception(regs, sfsr, sfar);
|
|
goto out;
|
|
}
|
|
advance(regs);
|
|
out:
|
|
exception_exit(prev_state);
|
|
}
|
|
|
|
void handle_stdfmna(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr)
|
|
{
|
|
enum ctx_state prev_state = exception_enter();
|
|
unsigned long pc = regs->tpc;
|
|
unsigned long tstate = regs->tstate;
|
|
u32 insn;
|
|
u64 value;
|
|
u8 freg;
|
|
int flag;
|
|
struct fpustate *f = FPUSTATE;
|
|
|
|
if (tstate & TSTATE_PRIV)
|
|
die_if_kernel("stdfmna from kernel", regs);
|
|
perf_sw_event(PERF_COUNT_SW_ALIGNMENT_FAULTS, 1, regs, sfar);
|
|
if (test_thread_flag(TIF_32BIT))
|
|
pc = (u32)pc;
|
|
if (get_user(insn, (u32 __user *) pc) != -EFAULT) {
|
|
int asi = decode_asi(insn, regs);
|
|
freg = ((insn >> 25) & 0x1e) | ((insn >> 20) & 0x20);
|
|
value = 0;
|
|
flag = (freg < 32) ? FPRS_DL : FPRS_DU;
|
|
if ((asi > ASI_SNFL) ||
|
|
(asi < ASI_P))
|
|
goto daex;
|
|
save_and_clear_fpu();
|
|
if (current_thread_info()->fpsaved[0] & flag)
|
|
value = *(u64 *)&f->regs[freg];
|
|
switch (asi) {
|
|
case ASI_P:
|
|
case ASI_S: break;
|
|
case ASI_PL:
|
|
case ASI_SL:
|
|
value = __swab64p(&value); break;
|
|
default: goto daex;
|
|
}
|
|
if (put_user (value >> 32, (u32 __user *) sfar) ||
|
|
__put_user ((u32)value, (u32 __user *)(sfar + 4)))
|
|
goto daex;
|
|
} else {
|
|
daex:
|
|
if (tlb_type == hypervisor)
|
|
sun4v_data_access_exception(regs, sfar, sfsr);
|
|
else
|
|
spitfire_data_access_exception(regs, sfsr, sfar);
|
|
goto out;
|
|
}
|
|
advance(regs);
|
|
out:
|
|
exception_exit(prev_state);
|
|
}
|