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pcie_sriov: Reset SR-IOV extended capability 

pcie_sriov_pf_disable_vfs() is called when resetting the PF, but it only
disables VFs and does not reset SR-IOV extended capability, leaking the
state and making the VF Enable register inconsistent with the actual
state.

Replace pcie_sriov_pf_disable_vfs() with pcie_sriov_pf_reset(), which
does not only disable VFs but also resets the capability.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-Id: <20240228-reuse-v8-3-282660281e60@daynix.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Sriram Yagnaraman <sriram.yagnaraman@ericsson.com>
master
Akihiko Odaki 2024-02-28 20:33:14 +09:00 committed by Michael S. Tsirkin
parent 6081b4243c
commit c8bc4db403
4 changed files with 22 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
hw/net/igb.c
View File

@ -493,7 +493,7 @@ static void igb_qdev_reset_hold(Object *obj)
trace_e1000e_cb_qdev_reset_hold();
pcie_sriov_pf_disable_vfs(d);
pcie_sriov_pf_reset(d);
igb_core_reset(&s->core);
}

2
hw/nvme/ctrl.c
View File

@ -7116,7 +7116,7 @@ static void nvme_ctrl_reset(NvmeCtrl *n, NvmeResetType rst)
}
if (rst != NVME_RESET_CONTROLLER) {
pcie_sriov_pf_disable_vfs(pci_dev);
pcie_sriov_pf_reset(pci_dev);
}
}

26
hw/pci/pcie_sriov.c
View File

@ -249,16 +249,26 @@ void pcie_sriov_config_write(PCIDevice *dev, uint32_t address,
}
/* Reset SR/IOV VF Enable bit to trigger an unregister of all VFs */
void pcie_sriov_pf_disable_vfs(PCIDevice *dev)
/* Reset SR/IOV */
void pcie_sriov_pf_reset(PCIDevice *dev)
{
uint16_t sriov_cap = dev->exp.sriov_cap;
if (sriov_cap) {
uint32_t val = pci_get_byte(dev->config + sriov_cap + PCI_SRIOV_CTRL);
if (val & PCI_SRIOV_CTRL_VFE) {
val &= ~PCI_SRIOV_CTRL_VFE;
pcie_sriov_config_write(dev, sriov_cap + PCI_SRIOV_CTRL, val, 1);
}
if (!sriov_cap) {
return;
}
pci_set_word(dev->config + sriov_cap + PCI_SRIOV_CTRL, 0);
unregister_vfs(dev);
/*
* Default is to use 4K pages, software can modify it
* to any of the supported bits
*/
pci_set_word(dev->config + sriov_cap + PCI_SRIOV_SYS_PGSIZE, 0x1);
for (uint16_t i = 0; i < PCI_NUM_REGIONS; i++) {
pci_set_quad(dev->config + sriov_cap + PCI_SRIOV_BAR + i * 4,
dev->exp.sriov_pf.vf_bar_type[i]);
}
}

4
include/hw/pci/pcie_sriov.h
View File

@ -58,8 +58,8 @@ void pcie_sriov_pf_add_sup_pgsize(PCIDevice *dev, uint16_t opt_sup_pgsize);
void pcie_sriov_config_write(PCIDevice *dev, uint32_t address,
uint32_t val, int len);
/* Reset SR/IOV VF Enable bit to unregister all VFs */
void pcie_sriov_pf_disable_vfs(PCIDevice *dev);
/* Reset SR/IOV */
void pcie_sriov_pf_reset(PCIDevice *dev);
/* Get logical VF number of a VF - only valid for VFs */
uint16_t pcie_sriov_vf_number(PCIDevice *dev);