diff options
| author | Vaibhav Jain <vaibhav@linux.vnet.ibm.com> | 2018-02-09 09:39:16 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-03-13 15:50:23 +1100 |
| commit | 03ebb419b896e0fb2da3f34b57d45e62cafe4009 (patch) | |
| tree | 9b74b70a6914f77b5f93b69bbdd9ff42dcc73d0d /drivers/misc/cxl | |
| parent | 1ff3b404019adf9d605224e1dce0677a0375d274 (diff) | |
| download | linux-03ebb419b896e0fb2da3f34b57d45e62cafe4009.tar.gz | |
cxl: Enable NORST bit in PSL_DEBUG register for PSL9
We enable the NORST bit by default for debug afu images to prevent
reset of AFU trace-data on a PCI link drop. For production AFU images
this bit is always ignored and PSL gets reconfigured anyways thereby
resetting the trace data. So setting this bit for non-debug images
doesn't have any impact.
Signed-off-by: Vaibhav Jain <vaibhav@linux.vnet.ibm.com>
Reviewed-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
Acked-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Acked-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'drivers/misc/cxl')
| -rw-r--r-- | drivers/misc/cxl/pci.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/misc/cxl/pci.c b/drivers/misc/cxl/pci.c index 758842f65a1b3..c983f23cc2ed0 100644 --- a/drivers/misc/cxl/pci.c +++ b/drivers/misc/cxl/pci.c @@ -503,8 +503,12 @@ static int init_implementation_adapter_regs_psl9(struct cxl *adapter, if (cxl_is_power9_dd1()) { /* Disabling deadlock counter CAR */ cxl_p1_write(adapter, CXL_PSL9_GP_CT, 0x0020000000000001ULL); - } else - cxl_p1_write(adapter, CXL_PSL9_DEBUG, 0x4000000000000000ULL); + /* Enable NORST */ + cxl_p1_write(adapter, CXL_PSL9_DEBUG, 0x8000000000000000ULL); + } else { + /* Enable NORST and DD2 features */ + cxl_p1_write(adapter, CXL_PSL9_DEBUG, 0xC000000000000000ULL); + } return 0; } |