clear-pkgs-linux-iot-lts2018/0977-Fix-the-sample-data-flushing-issue-on-all-cpu-buffer.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Manisha Chinthapally <manisha.chinthapally@intel.com>
Date: Wed, 30 Jan 2019 16:36:50 -0800
Subject: [PATCH] Fix the sample data flushing issue on all cpu buffers

Currently, per-cpu buffers are flushed by each cpu on SOS. However,
when ACRN SOS launches UOS, it offlines 3 of 4 vcpus, which prevents
flushing sample data from all cpu buffers.

This patch makes the remaining online cpu to flush data samples from
all cpu buffers.

Tracked-On: PKT-1717
Signed-off-by: Min Lim <min.yeol.lim@intel.com>
---
 drivers/platform/x86/sepdk/sep/lwpmudrv.c | 11 +++++++++--
 drivers/platform/x86/sepdk/sep/pmi.c      | 17 ++++++++++++++---
 2 files changed, 23 insertions(+), 5 deletions(-)

diff --git a/drivers/platform/x86/sepdk/sep/lwpmudrv.c b/drivers/platform/x86/sepdk/sep/lwpmudrv.c
index ccc78629b028..be5310ef43b8 100755
--- a/drivers/platform/x86/sepdk/sep/lwpmudrv.c
+++ b/drivers/platform/x86/sepdk/sep/lwpmudrv.c
@@ -2241,6 +2241,8 @@ static VOID lwpmudrv_ACRN_Buffer_Read(
 #endif
 )
 {
+	S32 i;
+
 	SEP_DRV_LOG_TRACE_IN("");
 
 	if (GET_DRIVER_STATE() != DRV_STATE_RUNNING) {
@@ -2248,7 +2250,9 @@ static VOID lwpmudrv_ACRN_Buffer_Read(
 		return;
 	}
 
-	CONTROL_Invoke_Parallel(PMI_Buffer_Handler, NULL);
+	for (i = 0; i < GLOBAL_STATE_num_cpus(driver_state); i++) {
+		PMI_Buffer_Handler(&i);
+	}
 
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0)
 	mod_timer(buffer_read_timer, jiffies + buffer_timer_interval);
@@ -4261,7 +4265,10 @@ static OS_STATUS lwpmudrv_Prepare_Stop(void)
 
 	lwpmudrv_ACRN_Flush_Stop_Timer();
         SEP_DRV_LOG_TRACE("Calling final PMI_Buffer_Handler\n");
-	CONTROL_Invoke_Parallel(PMI_Buffer_Handler, NULL);
+
+	for (i = 0; i < GLOBAL_STATE_num_cpus(driver_state); i++) {
+		PMI_Buffer_Handler(&i);
+	}
 #endif
 
 	SEP_DRV_LOG_TRACE("Outside of all interrupts.");
diff --git a/drivers/platform/x86/sepdk/sep/pmi.c b/drivers/platform/x86/sepdk/sep/pmi.c
index 934473f57efa..516a7f002764 100755
--- a/drivers/platform/x86/sepdk/sep/pmi.c
+++ b/drivers/platform/x86/sepdk/sep/pmi.c
@@ -442,10 +442,21 @@ VOID PMI_Buffer_Handler(PVOID data)
 	U64 overflow_status = 0;
 
 	if (!pcb || !cpu_buf || !devices) {
+		SEP_DRV_LOG_ERROR(
+			"Invalid data pointers in PMI_Buffer_Handler!\n");
 		return;
 	}
 
-	cpu_id = (S32)CONTROL_THIS_CPU();
+	if (data) {
+		cpu_id = *(S32 *)data;
+		if (cpu_id >= GLOBAL_STATE_num_cpus(driver_state)) {
+			SEP_DRV_LOG_ERROR(
+				"Invalid cpu_id: %d\n", cpu_id);
+			return;
+		}
+	} else {
+		cpu_id = (S32)CONTROL_THIS_CPU();
+	}
 	pcpu = &pcb[cpu_id];
 	bd = &cpu_buf[cpu_id];
 	dev_idx = core_to_dev_map[cpu_id];
@@ -493,14 +504,14 @@ VOID PMI_Buffer_Handler(PVOID data)
 			SEP_DRV_LOG_TRACE("payload_size = %x\n", payload_size);
 			if (header.payload_size > payload_size) {
 				// Mismatch in payload size in header info
-				SEP_PRINT_ERROR(
+				SEP_DRV_LOG_ERROR(
 					"Mismatch in data size: header=%llu, payload_size=%d\n",
 					header.payload_size, payload_size);
 				goto handler_cleanup;
 			}
 			if (header.cpu_id != cpu_id) {
 				// Mismatch in cpu index in header info
-				SEP_PRINT_ERROR(
+				SEP_DRV_LOG_ERROR(
 					"Mismatch in cpu idx: header=%u, buffer=%d\n",
 					header.cpu_id, cpu_id);
 				goto handler_cleanup;
-- 
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