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cxl: Define process problem state area at attach time only

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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
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11
drivers/misc/cxl/api.c
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@ -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);