FSP: Give up PSI link on shutdown

Since we are anyway on the way to standby and apparently the other
hypervisor also does this.

Tested-by: Vipin K Parashar <vipin@linux.vnet.ibm.com>
Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/hw/fsp/fsp.c b/hw/fsp/fsp.c
index b53c3f00..220b97ea 100644
--- a/hw/fsp/fsp.c
+++ b/hw/fsp/fsp.c
@@ -569,6 +569,28 @@ static void fsp_start_rr(struct fsp *fsp)
 	 */
 }
 
+/*
+ * Called on normal/quick shutdown to give up the PSI link
+ */
+void fsp_reset_links(void)
+{
+	struct fsp *fsp = fsp_get_active();
+	struct fsp_iopath *iop;
+
+	if (!fsp)
+		return;
+
+	/* Already in one of the error states? */
+	if (fsp_in_hir(fsp) || fsp_in_reset(fsp))
+		return;
+
+	iop = &fsp->iopath[fsp->active_iopath];
+	prlog(PR_NOTICE, "FSP #%d: Host initiated shutdown."
+			" Giving up the PSI link\n", fsp->index);
+	psi_disable_link(iop->psi);
+	return;
+}
+
 static void fsp_trace_event(struct fsp *fsp, u32 evt,
 			    u32 data0, u32 data1, u32 data2, u32 data3)
 {