From e636c8d336489bf3eed5878299e6cc045bbad077 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:17:29 +0000
Subject: [PATCH] debug lk
---
kernel/drivers/xen/xen-pciback/conf_space.c | 53 +++++++++++++++++++++++++++++++++++++++++++----------
1 files changed, 43 insertions(+), 10 deletions(-)
diff --git a/kernel/drivers/xen/xen-pciback/conf_space.c b/kernel/drivers/xen/xen-pciback/conf_space.c
index 6011171..059de92 100644
--- a/kernel/drivers/xen/xen-pciback/conf_space.c
+++ b/kernel/drivers/xen/xen-pciback/conf_space.c
@@ -10,6 +10,8 @@
* Author: Ryan Wilson <hap9@epoch.ncsc.mil>
*/
+#define dev_fmt(fmt) DRV_NAME ": " fmt
+
#include <linux/kernel.h>
#include <linux/moduleparam.h>
#include <linux/pci.h>
@@ -154,9 +156,7 @@
* (as if device didn't respond) */
u32 value = 0, tmp_val;
- if (unlikely(verbose_request))
- printk(KERN_DEBUG DRV_NAME ": %s: read %d bytes at 0x%x\n",
- pci_name(dev), size, offset);
+ dev_dbg(&dev->dev, "read %d bytes at 0x%x\n", size, offset);
if (!valid_request(offset, size)) {
err = XEN_PCI_ERR_invalid_offset;
@@ -195,9 +195,7 @@
}
out:
- if (unlikely(verbose_request))
- printk(KERN_DEBUG DRV_NAME ": %s: read %d bytes at 0x%x = %x\n",
- pci_name(dev), size, offset, value);
+ dev_dbg(&dev->dev, "read %d bytes at 0x%x = %x\n", size, offset, value);
*ret_val = value;
return xen_pcibios_err_to_errno(err);
@@ -212,10 +210,8 @@
u32 tmp_val;
int field_start, field_end;
- if (unlikely(verbose_request))
- printk(KERN_DEBUG
- DRV_NAME ": %s: write request %d bytes at 0x%x = %x\n",
- pci_name(dev), size, offset, value);
+ dev_dbg(&dev->dev, "write request %d bytes at 0x%x = %x\n",
+ size, offset, value);
if (!valid_request(offset, size))
return XEN_PCI_ERR_invalid_offset;
@@ -286,6 +282,43 @@
return xen_pcibios_err_to_errno(err);
}
+int xen_pcibk_get_interrupt_type(struct pci_dev *dev)
+{
+ int err;
+ u16 val;
+ int ret = 0;
+
+ err = pci_read_config_word(dev, PCI_COMMAND, &val);
+ if (err)
+ return err;
+ if (!(val & PCI_COMMAND_INTX_DISABLE))
+ ret |= INTERRUPT_TYPE_INTX;
+
+ /*
+ * Do not trust dev->msi(x)_enabled here, as enabling could be done
+ * bypassing the pci_*msi* functions, by the qemu.
+ */
+ if (dev->msi_cap) {
+ err = pci_read_config_word(dev,
+ dev->msi_cap + PCI_MSI_FLAGS,
+ &val);
+ if (err)
+ return err;
+ if (val & PCI_MSI_FLAGS_ENABLE)
+ ret |= INTERRUPT_TYPE_MSI;
+ }
+ if (dev->msix_cap) {
+ err = pci_read_config_word(dev,
+ dev->msix_cap + PCI_MSIX_FLAGS,
+ &val);
+ if (err)
+ return err;
+ if (val & PCI_MSIX_FLAGS_ENABLE)
+ ret |= INTERRUPT_TYPE_MSIX;
+ }
+ return ret ?: INTERRUPT_TYPE_NONE;
+}
+
void xen_pcibk_config_free_dyn_fields(struct pci_dev *dev)
{
struct xen_pcibk_dev_data *dev_data = pci_get_drvdata(dev);
--
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