cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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debugfs.c (4263B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * Copyright 2014 IBM Corp.
      4 */
      5
      6#include <linux/debugfs.h>
      7#include <linux/kernel.h>
      8#include <linux/slab.h>
      9
     10#include "cxl.h"
     11
     12static struct dentry *cxl_debugfs;
     13
     14/* Helpers to export CXL mmaped IO registers via debugfs */
     15static int debugfs_io_u64_get(void *data, u64 *val)
     16{
     17	*val = in_be64((u64 __iomem *)data);
     18	return 0;
     19}
     20
     21static int debugfs_io_u64_set(void *data, u64 val)
     22{
     23	out_be64((u64 __iomem *)data, val);
     24	return 0;
     25}
     26DEFINE_DEBUGFS_ATTRIBUTE(fops_io_x64, debugfs_io_u64_get, debugfs_io_u64_set,
     27			 "0x%016llx\n");
     28
     29static void debugfs_create_io_x64(const char *name, umode_t mode,
     30				  struct dentry *parent, u64 __iomem *value)
     31{
     32	debugfs_create_file_unsafe(name, mode, parent, (void __force *)value,
     33				   &fops_io_x64);
     34}
     35
     36void cxl_debugfs_add_adapter_regs_psl9(struct cxl *adapter, struct dentry *dir)
     37{
     38	debugfs_create_io_x64("fir1", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_FIR1));
     39	debugfs_create_io_x64("fir_mask", 0400, dir,
     40			      _cxl_p1_addr(adapter, CXL_PSL9_FIR_MASK));
     41	debugfs_create_io_x64("fir_cntl", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_FIR_CNTL));
     42	debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_TRACECFG));
     43	debugfs_create_io_x64("debug", 0600, dir,
     44			      _cxl_p1_addr(adapter, CXL_PSL9_DEBUG));
     45	debugfs_create_io_x64("xsl-debug", 0600, dir,
     46			      _cxl_p1_addr(adapter, CXL_XSL9_DBG));
     47}
     48
     49void cxl_debugfs_add_adapter_regs_psl8(struct cxl *adapter, struct dentry *dir)
     50{
     51	debugfs_create_io_x64("fir1", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR1));
     52	debugfs_create_io_x64("fir2", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR2));
     53	debugfs_create_io_x64("fir_cntl", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR_CNTL));
     54	debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_TRACE));
     55}
     56
     57void cxl_debugfs_adapter_add(struct cxl *adapter)
     58{
     59	struct dentry *dir;
     60	char buf[32];
     61
     62	if (!cxl_debugfs)
     63		return;
     64
     65	snprintf(buf, 32, "card%i", adapter->adapter_num);
     66	dir = debugfs_create_dir(buf, cxl_debugfs);
     67	adapter->debugfs = dir;
     68
     69	debugfs_create_io_x64("err_ivte", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_ErrIVTE));
     70
     71	if (adapter->native->sl_ops->debugfs_add_adapter_regs)
     72		adapter->native->sl_ops->debugfs_add_adapter_regs(adapter, dir);
     73}
     74
     75void cxl_debugfs_adapter_remove(struct cxl *adapter)
     76{
     77	debugfs_remove_recursive(adapter->debugfs);
     78}
     79
     80void cxl_debugfs_add_afu_regs_psl9(struct cxl_afu *afu, struct dentry *dir)
     81{
     82	debugfs_create_io_x64("serr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SERR_An));
     83}
     84
     85void cxl_debugfs_add_afu_regs_psl8(struct cxl_afu *afu, struct dentry *dir)
     86{
     87	debugfs_create_io_x64("sstp0", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP0_An));
     88	debugfs_create_io_x64("sstp1", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP1_An));
     89
     90	debugfs_create_io_x64("fir", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_FIR_SLICE_An));
     91	debugfs_create_io_x64("serr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SERR_An));
     92	debugfs_create_io_x64("afu_debug", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_AFU_DEBUG_An));
     93	debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SLICE_TRACE));
     94}
     95
     96void cxl_debugfs_afu_add(struct cxl_afu *afu)
     97{
     98	struct dentry *dir;
     99	char buf[32];
    100
    101	if (!afu->adapter->debugfs)
    102		return;
    103
    104	snprintf(buf, 32, "psl%i.%i", afu->adapter->adapter_num, afu->slice);
    105	dir = debugfs_create_dir(buf, afu->adapter->debugfs);
    106	afu->debugfs = dir;
    107
    108	debugfs_create_io_x64("sr",         S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SR_An));
    109	debugfs_create_io_x64("dsisr",      S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_DSISR_An));
    110	debugfs_create_io_x64("dar",        S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_DAR_An));
    111
    112	debugfs_create_io_x64("err_status", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_ErrStat_An));
    113
    114	if (afu->adapter->native->sl_ops->debugfs_add_afu_regs)
    115		afu->adapter->native->sl_ops->debugfs_add_afu_regs(afu, dir);
    116}
    117
    118void cxl_debugfs_afu_remove(struct cxl_afu *afu)
    119{
    120	debugfs_remove_recursive(afu->debugfs);
    121}
    122
    123void __init cxl_debugfs_init(void)
    124{
    125	if (!cpu_has_feature(CPU_FTR_HVMODE))
    126		return;
    127
    128	cxl_debugfs = debugfs_create_dir("cxl", NULL);
    129}
    130
    131void cxl_debugfs_exit(void)
    132{
    133	debugfs_remove_recursive(cxl_debugfs);
    134}