[Skiboot] [PATCH v2 16/17] fadump: Send OPAL relocated base address to SBE
Vasant Hegde
hegdevasant at linux.vnet.ibm.com
Fri May 4 20:28:16 AEST 2018
OPAL relocates itself during boot. During memory preserving IPL hostboot
needs to access relocated OPAL. Hence send relocated base address to SBE
via 'stash MPIPL config' chip-op. During next IPL SBE will send stashed
data to hostboot... so that hostboot can access these data.
Signed-off-by: Vasant Hegde <hegdevasant at linux.vnet.ibm.com>
---
core/opal-dump.c | 4 ++++
hw/sbe-p9.c | 31 +++++++++++++++++++++++++++++++
include/sbe-p9.h | 6 ++++++
3 files changed, 41 insertions(+)
diff --git a/core/opal-dump.c b/core/opal-dump.c
index 16def2a05..1343bfe44 100644
--- a/core/opal-dump.c
+++ b/core/opal-dump.c
@@ -23,6 +23,7 @@
#include <opal.h>
#include <opal-dump.h>
#include <opal-internal.h>
+#include <sbe-p9.h>
#include <skiboot.h>
#include <ccan/endian/endian.h>
@@ -345,6 +346,9 @@ void opal_fadump_init(void)
adjust_opal_dump_size(dump_node);
+ /* Send OPAL relocated base address to SBE */
+ p9_sbe_send_relocated_base(SKIBOOT_BASE);
+
/* OPAL interface */
opal_register(OPAL_FADUMP_MANAGE, opal_fadump_manage, 3);
}
diff --git a/hw/sbe-p9.c b/hw/sbe-p9.c
index d52ada15a..12d9e97ff 100644
--- a/hw/sbe-p9.c
+++ b/hw/sbe-p9.c
@@ -861,6 +861,37 @@ bool p9_sbe_timer_ok(void)
return sbe_has_timer;
}
+static void p9_sbe_stash_chipop_resp(struct p9_sbe_msg *msg)
+{
+ int rc = p9_sbe_get_primary_rc(msg->resp);
+
+ if (rc == SBE_STATUS_PRI_SUCCESS) {
+ prlog(PR_DEBUG, "Sent stash MPIPL config\n");
+ } else {
+ prlog(PR_DEBUG,
+ "Failed to send stash MPIPL config [rc = 0x%x]\n", rc);
+ }
+
+ p9_sbe_freemsg(msg);
+}
+
+void p9_sbe_send_relocated_base(uint64_t val)
+{
+ u8 key = SBE_STASH_KEY_SKIBOOT_BASE;
+ u16 cmd = SBE_CMD_STASH_MPIPL_CONFIG;
+ u16 flag = SBE_CMD_CTRL_RESP_REQ;
+ struct p9_sbe_msg *msg;
+
+ msg = p9_sbe_mkmsg(cmd, flag, key, val, 0);
+ if (!msg) {
+ prlog(PR_DEBUG, "Message allocation failed\n");
+ return;
+ }
+ if (p9_sbe_queue_msg(sbe_default_chip_id, msg, p9_sbe_stash_chipop_resp)) {
+ prlog(PR_ERR, "Failed to queue stash MPIPL config message\n");
+ }
+}
+
void p9_sbe_init(void)
{
struct dt_node *xn;
diff --git a/include/sbe-p9.h b/include/sbe-p9.h
index 4b839d8ba..7101dc700 100644
--- a/include/sbe-p9.h
+++ b/include/sbe-p9.h
@@ -159,6 +159,9 @@
#define CONTROL_TIMER_START 0x0001
#define CONTROL_TIMER_STOP 0x0002
+/* Stash MPIPL config */
+#define SBE_STASH_KEY_SKIBOOT_BASE 0x03
+
/* SBE message state */
enum p9_sbe_msg_state {
sbe_msg_unused = 0, /* Free */
@@ -237,4 +240,7 @@ extern bool p9_sbe_timer_ok(void);
/* Update SBE timer expiry */
extern void p9_sbe_update_timer_expiry(uint64_t new_target);
+/* Send skiboot relocated base address to SBE */
+extern void p9_sbe_send_relocated_base(uint64_t val);
+
#endif /* __SBE_P9_H */
--
2.14.3
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