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[PATCH v9 15/16] xen/arm: vpci: check guest range
- To: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>
- Date: Tue, 29 Aug 2023 23:19:47 +0000
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- Cc: Stewart Hildebrand <stewart.hildebrand@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Delivery-date: Tue, 29 Aug 2023 23:20:05 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Thread-index: AQHZ2s9NAWcA6L4O6U+PqFV61kFyWA==
- Thread-topic: [PATCH v9 15/16] xen/arm: vpci: check guest range
From: Stewart Hildebrand <stewart.hildebrand@xxxxxxx>
Skip mapping the BAR if it is not in a valid range.
Signed-off-by: Stewart Hildebrand <stewart.hildebrand@xxxxxxx>
---
xen/drivers/vpci/header.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/xen/drivers/vpci/header.c b/xen/drivers/vpci/header.c
index 1d243eeaf9..dbabdcbed2 100644
--- a/xen/drivers/vpci/header.c
+++ b/xen/drivers/vpci/header.c
@@ -345,6 +345,15 @@ static int modify_bars(const struct pci_dev *pdev,
uint16_t cmd, bool rom_only)
bar->enabled == !!(cmd & PCI_COMMAND_MEMORY) )
continue;
+#ifdef CONFIG_ARM
+ if ( !is_hardware_domain(pdev->domain) )
+ {
+ if ( (start_guest < PFN_DOWN(GUEST_VPCI_MEM_ADDR)) ||
+ (end_guest >= PFN_DOWN(GUEST_VPCI_MEM_ADDR +
GUEST_VPCI_MEM_SIZE)) )
+ continue;
+ }
+#endif
+
if ( !pci_check_bar(pdev, _mfn(start), _mfn(end)) )
{
printk(XENLOG_G_WARNING
--
2.41.0
|
