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cxl: sysfs support for guests

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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>
This commit is contained in:
Christophe Lombard
2016-03-04 12:26:37 +01:00
committed by Michael Ellerman
parent 14baf4d9c7
commit 4752876c71
5 changed files with 113 additions and 25 deletions
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25
drivers/misc/cxl/guest.c
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@@ -596,6 +596,30 @@ static int guest_afu_check_and_enable(struct cxl_afu *afu)
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 @@ const struct cxl_backend_ops cxl_guest_ops = {
.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,