cxl: New hcalls to support cxl adapters
The hypervisor calls provide an interface with a coherent platform
facility and function. It matches version 0.16 of the 'PAPR changes'
document.
The following hcalls are supported:
H_ATTACH_CA_PROCESS Attach a process element to a coherent platform
function.
H_DETACH_CA_PROCESS Detach a process element from a coherent
platform function.
H_CONTROL_CA_FUNCTION Allow the partition to manipulate or query
certain coherent platform function behaviors.
H_COLLECT_CA_INT_INFO Collect interrupt info about a coherent.
platform function after an interrupt occurred
H_CONTROL_CA_FAULTS Control the operation of a coherent platform
function after a fault occurs.
H_DOWNLOAD_CA_FACILITY Support for downloading a base adapter image to
the coherent platform facility, and for
validating the entire image after the download.
H_CONTROL_CA_FACILITY Allow the partition to manipulate or query
certain coherent platform facility behaviors.
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>
diff --git a/drivers/misc/cxl/main.c b/drivers/misc/cxl/main.c
index a9051512..814257b 100644
--- a/drivers/misc/cxl/main.c
+++ b/drivers/misc/cxl/main.c
@@ -162,6 +162,32 @@
return 0;
}
+/* print buffer content as integers when debugging */
+void cxl_dump_debug_buffer(void *buf, size_t buf_len)
+{
+#ifdef DEBUG
+ int i, *ptr;
+
+ /*
+ * We want to regroup up to 4 integers per line, which means they
+ * need to be in the same pr_devel() statement
+ */
+ ptr = (int *) buf;
+ for (i = 0; i * 4 < buf_len; i += 4) {
+ if ((i + 3) * 4 < buf_len)
+ pr_devel("%.8x %.8x %.8x %.8x\n", ptr[i], ptr[i + 1],
+ ptr[i + 2], ptr[i + 3]);
+ else if ((i + 2) * 4 < buf_len)
+ pr_devel("%.8x %.8x %.8x\n", ptr[i], ptr[i + 1],
+ ptr[i + 2]);
+ else if ((i + 1) * 4 < buf_len)
+ pr_devel("%.8x %.8x\n", ptr[i], ptr[i + 1]);
+ else
+ pr_devel("%.8x\n", ptr[i]);
+ }
+#endif /* DEBUG */
+}
+
/* Find a CXL adapter by it's number and increase it's refcount */
struct cxl *get_cxl_adapter(int num)
{