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From: Kajol Jain <kjain@linux.ibm.com>
To: acme@kernel.org, linuxppc-dev@lists.ozlabs.org,
	mpe@ellerman.id.au, sukadev@linux.vnet.ibm.com
Cc: linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
	anju@linux.vnet.ibm.com, maddy@linux.vnet.ibm.com,
	ravi.bangoria@linux.ibm.com, peterz@infradead.org,
	yao.jin@linux.intel.com, ak@linux.intel.com, jolsa@kernel.org,
	kan.liang@linux.intel.com, jmario@redhat.com,
	alexander.shishkin@linux.intel.com, mingo@kernel.org,
	paulus@ozlabs.org, namhyung@kernel.org, mpetlan@redhat.com,
	gregkh@linuxfoundation.org, benh@kernel.crashing.org,
	mamatha4@linux.vnet.ibm.com, mark.rutland@arm.com,
	tglx@linutronix.de, kjain@linux.ibm.com
Subject: [PATCH v7 5/5] powerpc/hv-24x7: Update post_mobility_fixup() to handle migration
Date: Fri, 27 Mar 2020 12:06:42 +0530
Message-ID: <20200327063642.26175-6-kjain@linux.ibm.com> (raw)
In-Reply-To: <20200327063642.26175-1-kjain@linux.ibm.com>

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


  parent reply index

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-27  6:36 [PATCH v7 0/5] powerpc/hv-24x7: Expose chip/sockets info to add json file metric support for the hv_24x7 socket/chip level events Kajol Jain
2020-03-27  6:36 ` [PATCH v7 1/5] powerpc/perf/hv-24x7: Fix inconsistent output values incase multiple hv-24x7 events run Kajol Jain
2020-04-29  8:56   ` Madhavan Srinivasan
2020-03-27  6:36 ` [PATCH v7 2/5] powerpc/hv-24x7: Add rtas call in hv-24x7 driver to get processor details Kajol Jain
2020-04-29  8:02   ` Madhavan Srinivasan
2020-04-29 11:31   ` Michael Ellerman
2020-05-06  9:53     ` kajoljain
2020-03-27  6:36 ` [PATCH v7 3/5] powerpc/hv-24x7: Add sysfs files inside hv-24x7 device to show " Kajol Jain
2020-04-29  9:08   ` Madhavan Srinivasan
2020-04-29 11:32   ` Michael Ellerman
2020-04-29 11:33     ` Michael Ellerman
2020-03-27  6:36 ` [PATCH v7 4/5] Documentation/ABI: Add ABI documentation for chips and sockets Kajol Jain
2020-03-27  6:36 ` Kajol Jain [this message]
2020-04-29  9:10   ` [PATCH v7 5/5] powerpc/hv-24x7: Update post_mobility_fixup() to handle migration Madhavan Srinivasan
2020-04-29 11:37   ` Michael Ellerman
2020-05-05  6:57     ` kajoljain
2020-05-05  7:05       ` Michael Ellerman

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