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| author |   Omer Shpigelman <oshpigelman@habana.ai> | 2019-05-01 14:38:38 +0300 |
|---|---|---|
| committer |   Oded Gabbay <oded.gabbay@gmail.com> | 2019-05-24 22:46:15 +0300 |
| commit | 89225ce4fc43da2db968923fc94e1469dbcdbd5a (patch) | |
| tree | 2e07242d5a6ada3012f753403ce5505807f75a8f /drivers/misc/habanalabs/habanalabs.h | |
| parent | Linux 5.2-rc1 (diff) | |
| download | linux-dev-89225ce4fc43da2db968923fc94e1469dbcdbd5a.tar.xz linux-dev-89225ce4fc43da2db968923fc94e1469dbcdbd5a.zip | |
habanalabs: halt debug engines on user process close
This patch fix a potential bug where a user's process has closed
unexpectedly without disabling the debug engines. In that case, the debug
engines might continue running but because the user's MMU mappings are
going away, we will get page fault errors.
This behavior is also opposed to the general rule where nothing runs on
the device after the user process closes.
The patch stops the debug H/W engines upon process termination and thus
makes sure nothing runs on the device after the process goes away.
Signed-off-by: Omer Shpigelman <oshpigelman@habana.ai>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Diffstat (limited to 'drivers/misc/habanalabs/habanalabs.h')
| -rw-r--r-- | drivers/misc/habanalabs/habanalabs.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/misc/habanalabs/habanalabs.h b/drivers/misc/habanalabs/habanalabs.h index 71243b319920..adef7d9d7488 100644 --- a/drivers/misc/habanalabs/habanalabs.h +++ b/drivers/misc/habanalabs/habanalabs.h @@ -501,6 +501,7 @@ enum hl_pll_frequency { * @init_iatu: Initialize the iATU unit inside the PCI controller. * @rreg: Read a register. Needed for simulator support. * @wreg: Write a register. Needed for simulator support. + * @halt_coresight: stop the ETF and ETR traces. */ struct hl_asic_funcs { int (*early_init)(struct hl_device *hdev); @@ -578,6 +579,7 @@ struct hl_asic_funcs { int (*init_iatu)(struct hl_device *hdev); u32 (*rreg)(struct hl_device *hdev, u32 reg); void (*wreg)(struct hl_device *hdev, u32 reg, u32 val); + void (*halt_coresight)(struct hl_device *hdev); }; |