linux-kernel - [PATCH AUTOSEL 4.4 14/60] powerpc/pseries: Update hv-24x7 information after migration

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Message-Id: <20200618013004.610532-14-sashal@kernel.org>
Date:   Wed, 17 Jun 2020 21:29:18 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Kajol Jain <kjain@...ux.ibm.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Sasha Levin <sashal@...nel.org>, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH AUTOSEL 4.4 14/60] powerpc/pseries: Update hv-24x7 information after migration

From: Kajol Jain <kjain@...ux.ibm.com>

[ Upstream commit 373b373053384f12951ae9f916043d955501d482 ]

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@...ux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@...erman.id.au>
Link: https://lore.kernel.org/r/20200525104308.9814-6-kjain@linux.ibm.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/powerpc/platforms/pseries/mobility.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/powerpc/platforms/pseries/mobility.c b/arch/powerpc/platforms/pseries/mobility.c
index 8d30a425a88a..58ddc4389a51 100644
--- a/arch/powerpc/platforms/pseries/mobility.c
+++ b/arch/powerpc/platforms/pseries/mobility.c
@@ -326,6 +326,9 @@ void post_mobility_fixup(void)
 	/* Possibly switch to a new RFI flush type */
 	pseries_setup_rfi_flush();
 
+	/* Reinitialise system information for hv-24x7 */
+	read_24x7_sys_info();
+
 	return;
 }
 
-- 
2.25.1