[PATCH v6 07/11] powerpc/hv-24x7: Update post_mobility_fixup() to handle migration

Kajol Jain
2020-03-20T12:55:27Z

Function 'read_sys_info_pseries()' is added to get system parameter
values like number of sockets and chips per socket.
and it gets these details via rtas_call with token
"PROCESSOR_MODULE_INFO".

Incase lpar migrate from one system to another, system
parameter details like chips per sockets or number of sockets might
change. So, it needs to be re-initialized otherwise, these values
corresponds to previous system values.
This patch adds a call to 'read_sys_info_pseries()' from
'post-mobility_fixup()' to re-init the physsockets and physchips values.

Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
---
arch/powerpc/platforms/pseries/mobility.c | 12 ++++++++++++
1 file changed, 12 insertions(+)

diff --git a/arch/powerpc/platforms/pseries/mobility.c b/arch/powerpc/platforms/pseries/mobility.c
index b571285f6c14..226accd6218b 100644
--- a/arch/powerpc/platforms/pseries/mobility.c
+++ b/arch/powerpc/platforms/pseries/mobility.c
@@ -371,6 +371,18 @@ void post_mobility_fixup(void)
/* Possibly switch to a new RFI flush type */
pseries_setup_rfi_flush();

+ /*
+ * Incase lpar migrate from one system to another, system
+ * parameter details like chips per sockets and number of sockets
+ * might change. So, it needs to be re-initialized otherwise these
+ * values corresponds to previous system.
+ * Here, adding a call to read_sys_info_pseries() declared in
+ * platforms/pseries/pseries.h to re-init the physsockets and
+ * physchips value.
+ */
+ if (IS_ENABLED(CONFIG_HV_PERF_CTRS) && IS_ENABLED(CONFIG_PPC_RTAS))
+ read_sys_info_pseries();
+
return;
}

--
2.18.1