diff options
author | Darren Powell <darren.powell@amd.com> | 2022-05-11 01:07:04 -0400 |
---|---|---|
committer | Alex Deucher <alexander.deucher@amd.com> | 2022-06-22 16:55:22 -0400 |
commit | ceb180361e3851007547c55035cd1de03f108f75 (patch) | |
tree | 8aa41595af43b8042d0a500c6c04248e2c5577c8 /drivers/gpu/drm/amd/pm/swsmu/smu13/aldebaran_ppt.c | |
parent | 543faf57ee0ef6feb1ef60122c0abb9097083ded (diff) |
amdgpu/pm: Fix possible array out-of-bounds if SCLK levels != 2
[v2]
simplified fix after Lijo's feedback
removed clocks.num_levels from calculation of loop count
removed unsafe accesses to shim table freq_values
retained corner case output only min,now if
clocks.num_levels == 1 && now > min
[v1]
added a check to populate and use SCLK shim table freq_values only
if using dpm_level == AMD_DPM_FORCED_LEVEL_MANUAL or
AMD_DPM_FORCED_LEVEL_PERF_DETERMINISM
removed clocks.num_levels from calculation of shim table size
removed unsafe accesses to shim table freq_values
output gfx_table values if using other dpm levels
added check for freq_match when using freq_values for when now == min_clk
== Test ==
LOGFILE=aldebaran-sclk.test.log
AMDGPU_PCI_ADDR=`lspci -nn | grep "VGA\|Display" | cut -d " " -f 1`
AMDGPU_HWMON=`ls -la /sys/class/hwmon | grep $AMDGPU_PCI_ADDR | awk '{print $9}'`
HWMON_DIR=/sys/class/hwmon/${AMDGPU_HWMON}
lspci -nn | grep "VGA\|Display" > $LOGFILE
FILES="pp_od_clk_voltage
pp_dpm_sclk"
for f in $FILES
do
echo === $f === >> $LOGFILE
cat $HWMON_DIR/device/$f >> $LOGFILE
done
cat $LOGFILE
Signed-off-by: Darren Powell <darren.powell@amd.com>
Reviewed-by: Kenneth Feng <kenneth.feng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/pm/swsmu/smu13/aldebaran_ppt.c')
-rw-r--r-- | drivers/gpu/drm/amd/pm/swsmu/smu13/aldebaran_ppt.c | 34 |
1 files changed, 12 insertions, 22 deletions
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu13/aldebaran_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu13/aldebaran_ppt.c index cc96a5b11d51..619aee51b123 100644 --- a/drivers/gpu/drm/amd/pm/swsmu/smu13/aldebaran_ppt.c +++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/aldebaran_ppt.c @@ -746,7 +746,7 @@ static int aldebaran_print_clk_levels(struct smu_context *smu, struct smu_13_0_dpm_table *single_dpm_table; struct smu_dpm_context *smu_dpm = &smu->smu_dpm; struct smu_13_0_dpm_context *dpm_context = NULL; - uint32_t display_levels; + int display_levels; uint32_t freq_values[3] = {0}; uint32_t min_clk, max_clk; @@ -778,7 +778,7 @@ static int aldebaran_print_clk_levels(struct smu_context *smu, return ret; } - display_levels = clocks.num_levels; + display_levels = (clocks.num_levels == 1) ? 1 : 2; min_clk = pstate_table->gfxclk_pstate.curr.min; max_clk = pstate_table->gfxclk_pstate.curr.max; @@ -788,30 +788,20 @@ static int aldebaran_print_clk_levels(struct smu_context *smu, /* fine-grained dpm has only 2 levels */ if (now > min_clk && now < max_clk) { - display_levels = clocks.num_levels + 1; + display_levels++; freq_values[2] = max_clk; freq_values[1] = now; } - /* - * For DPM disabled case, there will be only one clock level. - * And it's safe to assume that is always the current clock. - */ - if (display_levels == clocks.num_levels) { - for (i = 0; i < clocks.num_levels; i++) - size += sysfs_emit_at(buf, size, "%d: %uMhz %s\n", i, - freq_values[i], - (clocks.num_levels == 1) ? - "*" : - (aldebaran_freqs_in_same_level( - freq_values[i], now) ? - "*" : - "")); - } else { - for (i = 0; i < display_levels; i++) - size += sysfs_emit_at(buf, size, "%d: %uMhz %s\n", i, - freq_values[i], i == 1 ? "*" : ""); - } + for (i = 0; i < display_levels; i++) + size += sysfs_emit_at(buf, size, "%d: %uMhz %s\n", i, + freq_values[i], + (display_levels == 1) ? + "*" : + (aldebaran_freqs_in_same_level( + freq_values[i], now) ? + "*" : + "")); break; |