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pci: Detect BAR reprogramming

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Based on the value being written to the BAR, the implementation can
now detect if the BAR is being moved to another address. If that is the
case, it invokes move_bar() function from the DeviceRelocation trait.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit is contained in:
Sebastien Boeuf
2019-10-28 10:50:32 -07:00
committed by Samuel Ortiz
parent 04a449d3f3
commit 149b61b213
7 changed files with 197 additions and 28 deletions
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14
vfio/src/vfio_pci.rs
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@@ -16,9 +16,9 @@ use kvm_bindings::{
};
use kvm_ioctls::*;
use pci::{
MsiCap, MsixCap, MsixConfig, PciBarConfiguration, PciBarRegionType, PciCapabilityID,
PciClassCode, PciConfiguration, PciDevice, PciDeviceError, PciHeaderType, PciSubclass,
MSIX_TABLE_ENTRY_SIZE,
BarReprogrammingParams, MsiCap, MsixCap, MsixConfig, PciBarConfiguration, PciBarRegionType,
PciCapabilityID, PciClassCode, PciConfiguration, PciDevice, PciDeviceError, PciHeaderType,
PciSubclass, MSIX_TABLE_ENTRY_SIZE,
};
use std::os::unix::io::AsRawFd;
use std::ptr::null_mut;
@@ -967,6 +967,14 @@ impl PciDevice for VfioPciDevice {
& mask
}
fn detect_bar_reprogramming(
&mut self,
reg_idx: usize,
data: &[u8],
) -> Option<BarReprogrammingParams> {
self.configuration.detect_bar_reprogramming(reg_idx, data)
}
fn read_bar(&mut self, base: u64, offset: u64, data: &mut [u8]) {
let addr = base + offset;
if let Some(region) = self.find_region(addr) {