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-rw-r--r--arch/sparc/kernel/Makefile1
-rw-r--r--arch/sparc/kernel/adi_64.c96
-rw-r--r--arch/sparc/kernel/mdesc.c2
3 files changed, 99 insertions, 0 deletions
diff --git a/arch/sparc/kernel/Makefile b/arch/sparc/kernel/Makefile
index cc97545737f0..76cb57750dda 100644
--- a/arch/sparc/kernel/Makefile
+++ b/arch/sparc/kernel/Makefile
@@ -69,6 +69,7 @@ obj-$(CONFIG_SPARC64) += visemul.o
obj-$(CONFIG_SPARC64) += hvapi.o
obj-$(CONFIG_SPARC64) += sstate.o
obj-$(CONFIG_SPARC64) += mdesc.o
+obj-$(CONFIG_SPARC64) += adi_64.o
obj-$(CONFIG_SPARC64) += pcr.o
obj-$(CONFIG_SPARC64) += nmi.o
obj-$(CONFIG_SPARC64_SMP) += cpumap.o
diff --git a/arch/sparc/kernel/adi_64.c b/arch/sparc/kernel/adi_64.c
new file mode 100644
index 000000000000..8fb72585d9f1
--- /dev/null
+++ b/arch/sparc/kernel/adi_64.c
@@ -0,0 +1,96 @@
+/* adi_64.c: support for ADI (Application Data Integrity) feature on
+ * sparc m7 and newer processors. This feature is also known as
+ * SSM (Silicon Secured Memory).
+ *
+ * Copyright (C) 2016 Oracle and/or its affiliates. All rights reserved.
+ * Author: Khalid Aziz (khalid.aziz@oracle.com)
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.
+ */
+#include <linux/init.h>
+#include <asm/mdesc.h>
+#include <asm/adi_64.h>
+
+struct adi_config adi_state;
+
+/* mdesc_adi_init() : Parse machine description provided by the
+ * hypervisor to detect ADI capabilities
+ *
+ * Hypervisor reports ADI capabilities of platform in "hwcap-list" property
+ * for "cpu" node. If the platform supports ADI, "hwcap-list" property
+ * contains the keyword "adp". If the platform supports ADI, "platform"
+ * node will contain "adp-blksz", "adp-nbits" and "ue-on-adp" properties
+ * to describe the ADI capabilities.
+ */
+void __init mdesc_adi_init(void)
+{
+ struct mdesc_handle *hp = mdesc_grab();
+ const char *prop;
+ u64 pn, *val;
+ int len;
+
+ if (!hp)
+ goto adi_not_found;
+
+ pn = mdesc_node_by_name(hp, MDESC_NODE_NULL, "cpu");
+ if (pn == MDESC_NODE_NULL)
+ goto adi_not_found;
+
+ prop = mdesc_get_property(hp, pn, "hwcap-list", &len);
+ if (!prop)
+ goto adi_not_found;
+
+ /*
+ * Look for "adp" keyword in hwcap-list which would indicate
+ * ADI support
+ */
+ adi_state.enabled = false;
+ while (len) {
+ int plen;
+
+ if (!strcmp(prop, "adp")) {
+ adi_state.enabled = true;
+ break;
+ }
+
+ plen = strlen(prop) + 1;
+ prop += plen;
+ len -= plen;
+ }
+
+ if (!adi_state.enabled)
+ goto adi_not_found;
+
+ /* Find the ADI properties in "platform" node. If all ADI
+ * properties are not found, ADI support is incomplete and
+ * do not enable ADI in the kernel.
+ */
+ pn = mdesc_node_by_name(hp, MDESC_NODE_NULL, "platform");
+ if (pn == MDESC_NODE_NULL)
+ goto adi_not_found;
+
+ val = (u64 *) mdesc_get_property(hp, pn, "adp-blksz", &len);
+ if (!val)
+ goto adi_not_found;
+ adi_state.caps.blksz = *val;
+
+ val = (u64 *) mdesc_get_property(hp, pn, "adp-nbits", &len);
+ if (!val)
+ goto adi_not_found;
+ adi_state.caps.nbits = *val;
+
+ val = (u64 *) mdesc_get_property(hp, pn, "ue-on-adp", &len);
+ if (!val)
+ goto adi_not_found;
+ adi_state.caps.ue_on_adi = *val;
+
+ mdesc_release(hp);
+ return;
+
+adi_not_found:
+ adi_state.enabled = false;
+ adi_state.caps.blksz = 0;
+ adi_state.caps.nbits = 0;
+ if (hp)
+ mdesc_release(hp);
+}
diff --git a/arch/sparc/kernel/mdesc.c b/arch/sparc/kernel/mdesc.c
index 418592a09b41..39a2503fa3e1 100644
--- a/arch/sparc/kernel/mdesc.c
+++ b/arch/sparc/kernel/mdesc.c
@@ -22,6 +22,7 @@
#include <linux/uaccess.h>
#include <asm/oplib.h>
#include <asm/smp.h>
+#include <asm/adi.h>
/* Unlike the OBP device tree, the machine description is a full-on
* DAG. An arbitrary number of ARCs are possible from one
@@ -1345,5 +1346,6 @@ void __init sun4v_mdesc_init(void)
cur_mdesc = hp;
+ mdesc_adi_init();
report_platform_properties();
}