OpenE2K
/
linux
6
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

cxl: Define process problem state area at attach time only 

CXL kernel API was defining the process problem state area during
context initialization, making it possible to map the problem state
area before attaching the context. This won't work on a powerVM
guest. So force the logical behavior, like in userspace: attach first,
then map the problem state area.
Remove calls to cxl_assign_psn_space during init. The function is
already called on the attach paths.

Co-authored-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
Signed-off-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
Reviewed-by: Manoj Kumar <manoj@linux.vnet.ibm.com>
Acked-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Frederic Barrat 2016-03-04 12:26:27 +01:00 committed by Michael Ellerman
parent d56d301b51
commit cca44c0192
1 changed files with 2 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/misc/cxl/api.c
View File

@ -51,8 +51,6 @@ struct cxl_context *cxl_dev_context_init(struct pci_dev *dev)
if (rc)
goto err_mapping;
cxl_assign_psn_space(ctx);
return ctx;
err_mapping:
@ -207,7 +205,6 @@ EXPORT_SYMBOL_GPL(cxl_stop_context);
void cxl_set_master(struct cxl_context *ctx)
{
ctx->master = true;
cxl_assign_psn_space(ctx);
}
EXPORT_SYMBOL_GPL(cxl_set_master);
@ -325,15 +322,11 @@ EXPORT_SYMBOL_GPL(cxl_start_work);
void __iomem *cxl_psa_map(struct cxl_context *ctx)
{
struct cxl_afu *afu = ctx->afu;
int rc;
rc = cxl_afu_check_and_enable(afu);
if (rc)
if (ctx->status != STARTED)
return NULL;
pr_devel("%s: psn_phys%llx size:%llx\n",
__func__, afu->psn_phys, afu->adapter->ps_size);
__func__, ctx->psn_phys, ctx->psn_size);
return ioremap(ctx->psn_phys, ctx->psn_size);
}
EXPORT_SYMBOL_GPL(cxl_psa_map);