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-rw-r--r--hw/pci.c6
-rw-r--r--hw/pci_host.c24
-rw-r--r--hw/pci_host.h6
-rw-r--r--hw/pcie_host.c32
-rw-r--r--hw/vhost.c1
-rw-r--r--hw/virtio-blk.c1
-rw-r--r--hw/virtio-net.c2
-rw-r--r--hw/virtio-pci.c18
-rw-r--r--hw/virtio.c1
9 files changed, 64 insertions, 27 deletions
diff --git a/hw/pci.c b/hw/pci.c
index 36db58be76..8621d3d2b1 100644
--- a/hw/pci.c
+++ b/hw/pci.c
@@ -1145,8 +1145,7 @@ uint32_t pci_default_read_config(PCIDevice *d,
uint32_t address, int len)
{
uint32_t val = 0;
- assert(len == 1 || len == 2 || len == 4);
- len = MIN(len, pci_config_size(d) - address);
+
memcpy(&val, d->config + address, len);
return le32_to_cpu(val);
}
@@ -1154,9 +1153,8 @@ uint32_t pci_default_read_config(PCIDevice *d,
void pci_default_write_config(PCIDevice *d, uint32_t addr, uint32_t val, int l)
{
int i, was_irq_disabled = pci_irq_disabled(d);
- uint32_t config_size = pci_config_size(d);
- for (i = 0; i < l && addr + i < config_size; val >>= 8, ++i) {
+ for (i = 0; i < l; val >>= 8, ++i) {
uint8_t wmask = d->wmask[addr + i];
uint8_t w1cmask = d->w1cmask[addr + i];
assert(!(wmask & w1cmask));
diff --git a/hw/pci_host.c b/hw/pci_host.c
index 728e2d4ce5..2e8a29f1e3 100644
--- a/hw/pci_host.c
+++ b/hw/pci_host.c
@@ -47,17 +47,33 @@ static inline PCIDevice *pci_dev_find_by_addr(PCIBus *bus, uint32_t addr)
return pci_find_device(bus, bus_num, devfn);
}
+void pci_host_config_write_common(PCIDevice *pci_dev, uint32_t addr,
+ uint32_t limit, uint32_t val, uint32_t len)
+{
+ assert(len <= 4);
+ pci_dev->config_write(pci_dev, addr, val, MIN(len, limit - addr));
+}
+
+uint32_t pci_host_config_read_common(PCIDevice *pci_dev, uint32_t addr,
+ uint32_t limit, uint32_t len)
+{
+ assert(len <= 4);
+ return pci_dev->config_read(pci_dev, addr, MIN(len, limit - addr));
+}
+
void pci_data_write(PCIBus *s, uint32_t addr, uint32_t val, int len)
{
PCIDevice *pci_dev = pci_dev_find_by_addr(s, addr);
uint32_t config_addr = addr & (PCI_CONFIG_SPACE_SIZE - 1);
- if (!pci_dev)
+ if (!pci_dev) {
return;
+ }
PCI_DPRINTF("%s: %s: addr=%02" PRIx32 " val=%08" PRIx32 " len=%d\n",
__func__, pci_dev->name, config_addr, val, len);
- pci_dev->config_write(pci_dev, config_addr, val, len);
+ pci_host_config_write_common(pci_dev, config_addr, PCI_CONFIG_SPACE_SIZE,
+ val, len);
}
uint32_t pci_data_read(PCIBus *s, uint32_t addr, int len)
@@ -66,12 +82,12 @@ uint32_t pci_data_read(PCIBus *s, uint32_t addr, int len)
uint32_t config_addr = addr & (PCI_CONFIG_SPACE_SIZE - 1);
uint32_t val;
- assert(len == 1 || len == 2 || len == 4);
if (!pci_dev) {
return ~0x0;
}
- val = pci_dev->config_read(pci_dev, config_addr, len);
+ val = pci_host_config_read_common(pci_dev, config_addr,
+ PCI_CONFIG_SPACE_SIZE, len);
PCI_DPRINTF("%s: %s: addr=%02"PRIx32" val=%08"PRIx32" len=%d\n",
__func__, pci_dev->name, config_addr, val, len);
diff --git a/hw/pci_host.h b/hw/pci_host.h
index 05dcb662c6..7f551143bb 100644
--- a/hw/pci_host.h
+++ b/hw/pci_host.h
@@ -40,6 +40,12 @@ struct PCIHostState {
PCIBus *bus;
};
+/* common internal helpers for PCI/PCIe hosts, cut off overflows */
+void pci_host_config_write_common(PCIDevice *pci_dev, uint32_t addr,
+ uint32_t limit, uint32_t val, uint32_t len);
+uint32_t pci_host_config_read_common(PCIDevice *pci_dev, uint32_t addr,
+ uint32_t limit, uint32_t len);
+
void pci_data_write(PCIBus *s, uint32_t addr, uint32_t val, int len);
uint32_t pci_data_read(PCIBus *s, uint32_t addr, int len);
diff --git a/hw/pcie_host.c b/hw/pcie_host.c
index b7498656f2..f9fea3d918 100644
--- a/hw/pcie_host.c
+++ b/hw/pcie_host.c
@@ -56,23 +56,39 @@ static void pcie_mmcfg_data_write(PCIBus *s,
uint32_t mmcfg_addr, uint32_t val, int len)
{
PCIDevice *pci_dev = pcie_dev_find_by_mmcfg_addr(s, mmcfg_addr);
+ uint32_t addr;
+ uint32_t limit;
- if (!pci_dev)
+ if (!pci_dev) {
return;
-
- pci_dev->config_write(pci_dev,
- PCIE_MMCFG_CONFOFFSET(mmcfg_addr), val, len);
+ }
+ addr = PCIE_MMCFG_CONFOFFSET(mmcfg_addr);
+ limit = pci_config_size(pci_dev);
+ if (limit <= addr) {
+ /* conventional pci device can be behind pcie-to-pci bridge.
+ 256 <= addr < 4K has no effects. */
+ return;
+ }
+ pci_host_config_write_common(pci_dev, addr, limit, val, len);
}
-static uint32_t pcie_mmcfg_data_read(PCIBus *s, uint32_t addr, int len)
+static uint32_t pcie_mmcfg_data_read(PCIBus *s, uint32_t mmcfg_addr, int len)
{
- PCIDevice *pci_dev = pcie_dev_find_by_mmcfg_addr(s, addr);
+ PCIDevice *pci_dev = pcie_dev_find_by_mmcfg_addr(s, mmcfg_addr);
+ uint32_t addr;
+ uint32_t limit;
- assert(len == 1 || len == 2 || len == 4);
if (!pci_dev) {
return ~0x0;
}
- return pci_dev->config_read(pci_dev, PCIE_MMCFG_CONFOFFSET(addr), len);
+ addr = PCIE_MMCFG_CONFOFFSET(mmcfg_addr);
+ limit = pci_config_size(pci_dev);
+ if (limit <= addr) {
+ /* conventional pci device can be behind pcie-to-pci bridge.
+ 256 <= addr < 4K has no effects. */
+ return ~0x0;
+ }
+ return pci_host_config_read_common(pci_dev, addr, limit, len);
}
static void pcie_mmcfg_data_writeb(void *opaque,
diff --git a/hw/vhost.c b/hw/vhost.c
index c3d88214fe..19e72555c4 100644
--- a/hw/vhost.c
+++ b/hw/vhost.c
@@ -120,7 +120,6 @@ static void vhost_dev_unassign_memory(struct vhost_dev *dev,
if (start_addr <= reg->guest_phys_addr && memlast >= reglast) {
--dev->mem->nregions;
--to;
- assert(to >= 0);
++overlap_middle;
continue;
}
diff --git a/hw/virtio-blk.c b/hw/virtio-blk.c
index 6471ac85ab..836dbc3c12 100644
--- a/hw/virtio-blk.c
+++ b/hw/virtio-blk.c
@@ -594,4 +594,5 @@ void virtio_blk_exit(VirtIODevice *vdev)
{
VirtIOBlock *s = to_virtio_blk(vdev);
unregister_savevm(s->qdev, "virtio-blk", s);
+ virtio_cleanup(vdev);
}
diff --git a/hw/virtio-net.c b/hw/virtio-net.c
index a32cc019b0..3f10391f3e 100644
--- a/hw/virtio-net.c
+++ b/hw/virtio-net.c
@@ -1073,6 +1073,6 @@ void virtio_net_exit(VirtIODevice *vdev)
qemu_bh_delete(n->tx_bh);
}
- virtio_cleanup(&n->vdev);
qemu_del_vlan_client(&n->nic->nc);
+ virtio_cleanup(&n->vdev);
}
diff --git a/hw/virtio-pci.c b/hw/virtio-pci.c
index 316bf92db0..f3b3293db0 100644
--- a/hw/virtio-pci.c
+++ b/hw/virtio-pci.c
@@ -27,6 +27,7 @@
#include "kvm.h"
#include "blockdev.h"
#include "virtio-pci.h"
+#include "range.h"
/* from Linux's linux/virtio_pci.h */
@@ -516,17 +517,16 @@ static void virtio_write_config(PCIDevice *pci_dev, uint32_t address,
{
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
- if (PCI_COMMAND == address) {
- if (!(val & PCI_COMMAND_MASTER)) {
- if (!(proxy->flags & VIRTIO_PCI_FLAG_BUS_MASTER_BUG)) {
- virtio_pci_stop_ioeventfd(proxy);
- virtio_set_status(proxy->vdev,
- proxy->vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK);
- }
- }
+ pci_default_write_config(pci_dev, address, val, len);
+
+ if (range_covers_byte(address, len, PCI_COMMAND) &&
+ !(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER) &&
+ !(proxy->flags & VIRTIO_PCI_FLAG_BUS_MASTER_BUG)) {
+ virtio_pci_stop_ioeventfd(proxy);
+ virtio_set_status(proxy->vdev,
+ proxy->vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK);
}
- pci_default_write_config(pci_dev, address, val, len);
msix_write_config(pci_dev, address, val, len);
}
diff --git a/hw/virtio.c b/hw/virtio.c
index a8f4940da2..93dfb1e359 100644
--- a/hw/virtio.c
+++ b/hw/virtio.c
@@ -834,6 +834,7 @@ void virtio_cleanup(VirtIODevice *vdev)
if (vdev->config)
qemu_free(vdev->config);
qemu_free(vdev->vq);
+ qemu_free(vdev);
}
static void virtio_vmstate_change(void *opaque, int running, int reason)
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-28 18:38:01 +0000