xiaoxiang781216 commented on code in PR #11583:
URL: https://github.com/apache/nuttx/pull/11583#discussion_r1463663539


##########
arch/x86_64/src/intel64/intel64_createstack.c:
##########
@@ -161,7 +161,8 @@ int up_create_stack(struct tcb_s *tcb, size_t stack_size, 
uint8_t ttype)
 
       if (!tcb->stack_alloc_ptr)
         {
-          serr("ERROR: Failed to allocate stack, size %d\n", stack_size);
+          serr("ERROR: Failed to allocate stack, size %" PRIu64 "\n",

Review Comment:
   %zu



##########
drivers/virt/Make.defs:
##########
@@ -0,0 +1,43 @@
+############################################################################
+# drivers/pci/Make.defs

Review Comment:
   pci->virt



##########
arch/x86_64/src/intel64/intel64_lowsetup.c:
##########
@@ -52,10 +53,60 @@ volatile uint64_t *pt;
 volatile struct ist_s *ist64;
 volatile struct gdt_entry_s *gdt64;
 
+/* This holds information passed by the multiboot2 bootloader */
+
+uint32_t mb_magic __attribute__((section(".loader.bss")));
+uint32_t mb_info_struct __attribute__((section(".loader.bss")));
+
 /****************************************************************************
  * Private Functions
  ****************************************************************************/
 
+#ifdef CONFIG_ARCH_MULTIBOOT2
+/****************************************************************************
+ * Name: x86_64_mb2_config
+ *
+ * Description:
+ *   Parse multiboot2 info.
+ *
+ ****************************************************************************/
+
+static void x86_64_mb2_config(void)
+{
+  struct multiboot_tag *tag;
+
+  /* Check that we were actually booted by a mulitboot2 bootloader */
+
+  if (mb_magic != MULTIBOOT2_BOOTLOADER_MAGIC)
+    return;
+
+  for (tag = (struct multiboot_tag *)(uintptr_t)(mb_info_struct + 8);
+    tag->type != MULTIBOOT_TAG_TYPE_END;
+    tag = (struct multiboot_tag *)((uint8_t *)tag + ((tag->size + 7) & ~7)))

Review Comment:
   align with line 83



##########
drivers/pci/Make.defs:
##########
@@ -0,0 +1,32 @@
+############################################################################
+# drivers/pci/Make.defs

Review Comment:
   need remark



##########
arch/x86_64/src/intel64/intel64_lowsetup.c:
##########
@@ -52,10 +53,60 @@ volatile uint64_t *pt;
 volatile struct ist_s *ist64;
 volatile struct gdt_entry_s *gdt64;
 
+/* This holds information passed by the multiboot2 bootloader */
+
+uint32_t mb_magic __attribute__((section(".loader.bss")));
+uint32_t mb_info_struct __attribute__((section(".loader.bss")));
+
 /****************************************************************************
  * Private Functions
  ****************************************************************************/
 
+#ifdef CONFIG_ARCH_MULTIBOOT2
+/****************************************************************************
+ * Name: x86_64_mb2_config
+ *
+ * Description:
+ *   Parse multiboot2 info.
+ *
+ ****************************************************************************/
+
+static void x86_64_mb2_config(void)
+{
+  struct multiboot_tag *tag;
+
+  /* Check that we were actually booted by a mulitboot2 bootloader */
+
+  if (mb_magic != MULTIBOOT2_BOOTLOADER_MAGIC)
+    return;

Review Comment:
   add {}



##########
drivers/virt/Make.defs:
##########
@@ -0,0 +1,43 @@
+############################################################################
+# drivers/pci/Make.defs
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.  The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License.  You may obtain a copy of the License at
+# 
+#   http://www.apache.org/licenses/LICENSE-2.0
+# 
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+############################################################################
+
+# Don't build anything if there is no CAN support

Review Comment:
   remove



##########
drivers/pci/Make.defs:
##########
@@ -0,0 +1,32 @@
+############################################################################
+# drivers/pci/Make.defs
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.  The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License.  You may obtain a copy of the License at
+# 
+#   http://www.apache.org/licenses/LICENSE-2.0
+# 
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+############################################################################
+
+# Don't build anything if there is no CAN support
+
+ifeq ($(CONFIG_PCI),y)
+
+CSRCS += pci.c
+
+# Include PCI device driver build support
+
+DEPPATH += --dep-path pci
+VPATH += :pci
+CFLAGS += ${shell $(INCDIR) $(INCDIROPT) "$(CC)" 
$(TOPDIR)$(DELIM)drivers$(DELIM)pci}

Review Comment:
   ```${INCDIR_PREFIX}$(TOPDIR)$(DELIM)drivers$(DELIM)pci```



##########
include/nuttx/pci/pci.h:
##########
@@ -0,0 +1,472 @@
+/****************************************************************************
+ * include/nuttx/pci/pci.h
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#ifndef __INCLUDE_NUTTX_PCI_PCI_H
+#define __INCLUDE_NUTTX_PCI_PCI_H
+
+#ifdef CONFIG_PCI
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+#include <stdint.h>
+
+#include <nuttx/fs/ioctl.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* PCI config common registers */
+
+#define        PCI_CONFIG_VENDOR                 0x00
+#define        PCI_CONFIG_DEVICE                 0x02
+#define        PCI_CONFIG_COMMAND              0x04
+#define        PCI_CONFIG_REV_ID                 0x08
+#define        PCI_CONFIG_PROG_IF          0x09
+#define        PCI_CONFIG_SUBCLASS             0x0A

Review Comment:
   align withc each other



##########
drivers/virt/qemu_edu.c:
##########
@@ -0,0 +1,462 @@
+/*****************************************************************************
+ * drivers/virt/qemu_edu.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ *****************************************************************************/
+
+/*****************************************************************************
+ * Included Files
+ *****************************************************************************/
+
+#include <nuttx/config.h>
+#include <nuttx/arch.h>
+#include <nuttx/irq.h>
+#include <nuttx/kmalloc.h>
+
+#include <debug.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+#include <math.h>
+#include <unistd.h>
+#include <errno.h>
+#include <sched.h>
+
+#include <nuttx/pci/pci.h>
+#include <nuttx/virt/qemu_pci.h>
+
+/*****************************************************************************
+ * Pre-processor Definitions
+ *****************************************************************************/
+
+/* Registers defined for device.  Size 4 for < 0x80.  Size 8 for >= 0x80. */
+
+#define EDU_REG_ID          0x00  /* Identification */
+#define EDU_REG_LIVE        0x04  /* Liveness Check */
+#define EDU_REG_FAC         0x08  /* Factorial Computation */
+#define EDU_REG_STATUS      0x20  /* Status */
+#define EDU_REG_INT_STATUS  0x24  /* Interupt Status */
+#define EDU_REG_INT_RAISE   0x60  /* Raise an interrupt */
+#define EDU_REG_INT_ACK     0x64  /* Acknowledge interrupt */
+#define EDU_REG_DMA_SOURCE  0x80  /* Source address for DMA transfer */
+#define EDU_REG_DMA_DEST    0x88  /* Destination address for DMA transfer */
+#define EDU_REG_DMA_COUNT   0x90  /* Size of area to transfer with DMA */
+#define EDU_REG_DMA_CMD     0x98  /* Control DMA tranfer */
+
+#define EDU_CONTROL_BAR_ID      0
+#define EDU_CONTROL_BAR_OFFSET  PCI_HEADER_NORM_BAR0
+
+/*****************************************************************************
+ * Private Types
+ *****************************************************************************/
+
+struct qemu_edu_priv_s
+{
+  uintptr_t base_addr;
+  sem_t     isr_done;
+  uint32_t  test_result;
+};
+
+/*****************************************************************************
+ * Private Functions Definitions
+ *****************************************************************************/
+
+static void qemu_edu_write_reg32(uintptr_t addr, uint32_t val);
+
+static uint32_t qemu_edu_read_reg32(uintptr_t addr);
+
+static void qemu_edu_write_reg64(uintptr_t addr, uint64_t val);
+
+static void qemu_edu_test_poll(FAR struct pci_dev_s *dev,
+                               uintptr_t base_addr);
+
+static void qemu_edu_test_intx(FAR struct pci_dev_s *dev,
+                               struct qemu_edu_priv_s *drv_priv);
+
+static int qemu_edu_interrupt(int irq, void *context, FAR void *arg);
+
+static int qemu_edu_probe(FAR struct pci_bus_s *bus,
+                          FAR struct pci_dev_type_s *type, uint16_t bdf);
+
+/*****************************************************************************
+ * Public Data
+ *****************************************************************************/
+
+struct pci_dev_type_s g_pci_type_qemu_edu =

Review Comment:
   add const



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