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>

diff --git a/drivers/misc/cxl/api.c b/drivers/misc/cxl/api.c
index ea3eeb7011e1770e24f6287bac51826611bd0859..b45d857b02079d0d41edff61e1e58d8d06b6faf8 100644 (file)
--- a/drivers/misc/cxl/api.c
+++ b/drivers/misc/cxl/api.c
@@ -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);