commit 4752876c71701b7663a5ded789058ab2c05f7d0f
author Christophe Lombard <clombard@linux.vnet.ibm.com> Fri Mar 04 12:26:37 2016 +0100
committer Michael Ellerman <mpe@ellerman.id.au> Wed Mar 09 23:39:40 2016 +1100
tree 5f01e68b06a74c5c67013e8accd7deb4f49e4014
parent 14baf4d9c739e6e69150512d2eb23c71fffcc192

cxl: sysfs support for guests

Filter out a few adapter parameters which don't make sense in a guest.
Document the changes.

Co-authored-by: Frederic Barrat <fbarrat@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>

drivers/misc/cxl/guest.c

diff --git a/drivers/misc/cxl/guest.c b/drivers/misc/cxl/guest.c
index d7d53d8..b1b8ac5 100644
--- a/drivers/misc/cxl/guest.c
+++ b/drivers/misc/cxl/guest.c
@@ -596,6 +596,30 @@
 	return 0;
 }
 
+static bool guest_support_attributes(const char *attr_name,
+				     enum cxl_attrs type)
+{
+	switch (type) {
+	case CXL_ADAPTER_ATTRS:
+		if ((strcmp(attr_name, "base_image") == 0) ||
+			(strcmp(attr_name, "load_image_on_perst") == 0) ||
+			(strcmp(attr_name, "perst_reloads_same_image") == 0) ||
+			(strcmp(attr_name, "image_loaded") == 0))
+			return false;
+		break;
+	case CXL_AFU_MASTER_ATTRS:
+		if ((strcmp(attr_name, "pp_mmio_off") == 0))
+			return false;
+		break;
+	case CXL_AFU_ATTRS:
+		break;
+	default:
+		break;
+	}
+
+	return true;
+}
+
 static int activate_afu_directed(struct cxl_afu *afu)
 {
 	int rc;
@@ -936,6 +960,7 @@
 	.ack_irq = guest_ack_irq,
 	.attach_process = guest_attach_process,
 	.detach_process = guest_detach_process,
+	.support_attributes = guest_support_attributes,
 	.link_ok = guest_link_ok,
 	.release_afu = guest_release_afu,
 	.afu_read_err_buffer = guest_afu_read_err_buffer,