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[Qemu-devel] [RFC PATCH 27/30] xen/pt: add AER PCIe Extended Capability
From: |
Alexey Gerasimenko |
Subject: |
[Qemu-devel] [RFC PATCH 27/30] xen/pt: add AER PCIe Extended Capability descriptor and sizing |
Date: |
Tue, 13 Mar 2018 04:34:12 +1000 |
The patch provides Advanced Error Reporting PCIe Extended Capability
description structure and corresponding capability sizing function.
Signed-off-by: Alexey Gerasimenko <address@hidden>
---
hw/xen/xen_pt_config_init.c | 72 +++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 72 insertions(+)
diff --git a/hw/xen/xen_pt_config_init.c b/hw/xen/xen_pt_config_init.c
index 42296c08cc..98aae3daca 100644
--- a/hw/xen/xen_pt_config_init.c
+++ b/hw/xen/xen_pt_config_init.c
@@ -1924,6 +1924,70 @@ static int xen_pt_msix_size_init(XenPCIPassthroughState
*s,
return 0;
}
+/* get Advanced Error Reporting Extended Capability register group size */
+#define PCI_ERR_CAP_TLP_PREFIX_LOG (1U << 11)
+#define PCI_DEVCAP2_END_END_TLP_PREFIX (1U << 21)
+static int xen_pt_ext_cap_aer_size_init(XenPCIPassthroughState *s,
+ const XenPTRegGroupInfo *grp_reg,
+ uint32_t base_offset,
+ uint32_t *size)
+{
+ uint8_t dev_type = get_pcie_device_type(s);
+ uint32_t aer_caps = 0;
+ uint32_t sz = 0;
+ int pcie_cap_pos;
+ uint32_t devcaps2;
+ int ret = 0;
+
+ pcie_cap_pos = xen_host_pci_find_next_cap(&s->real_device, 0,
+ PCI_CAP_ID_EXP);
+ if (!pcie_cap_pos) {
+ XEN_PT_ERR(&s->dev,
+ "Cannot find a required PCI Express Capability\n");
+ return -1;
+ }
+
+ if (get_pcie_capability_version(s) > 1) {
+ ret = xen_host_pci_get_long(&s->real_device,
+ pcie_cap_pos + PCI_EXP_DEVCAP2,
+ &devcaps2);
+ if (ret) {
+ XEN_PT_ERR(&s->dev, "Error while reading Device "
+ "Capabilities 2 Register \n");
+ return -1;
+ }
+ }
+
+ if (devcaps2 & PCI_DEVCAP2_END_END_TLP_PREFIX) {
+ ret = xen_host_pci_get_long(&s->real_device,
+ base_offset + PCI_ERR_CAP,
+ &aer_caps);
+ if (ret) {
+ XEN_PT_ERR(&s->dev,
+ "Error while reading AER Extended Capability\n");
+ return -1;
+ }
+
+ if (aer_caps & PCI_ERR_CAP_TLP_PREFIX_LOG) {
+ sz = 0x48;
+ }
+ }
+
+ if (!sz) {
+ if (dev_type == PCI_EXP_TYPE_ROOT_PORT ||
+ dev_type == PCI_EXP_TYPE_RC_EC) {
+ sz = 0x38;
+ } else {
+ sz = 0x2C;
+ }
+ }
+
+ *size = sz;
+
+ log_pcie_extended_cap(s, "AER", base_offset, *size);
+ return ret;
+}
+
static const XenPTRegGroupInfo xen_pt_emu_reg_grps[] = {
/* Header Type0 reg group */
@@ -2192,6 +2256,14 @@ static const XenPTRegGroupInfo xen_pt_emu_reg_grps[] = {
.size_init = xen_pt_reg_grp_size_init,
.emu_regs = xen_pt_ext_cap_emu_reg_dummy,
},
+ /* Advanced Error Reporting Extended Capability reg group */
+ {
+ .grp_id = PCIE_EXT_CAP_ID(PCI_EXT_CAP_ID_ERR),
+ .grp_type = XEN_PT_GRP_TYPE_EMU,
+ .grp_size = 0xFF,
+ .size_init = xen_pt_ext_cap_aer_size_init,
+ .emu_regs = xen_pt_ext_cap_emu_reg_dummy,
+ },
{
.grp_size = 0,
},
--
2.11.0
- Re: [Qemu-devel] [RFC PATCH 16/30] q35/xen: Add Xen platform device support for Q35, (continued)
- [Qemu-devel] [RFC PATCH 18/30] xen/pt: XenHostPCIDevice: provide functions for PCI Capabilities and PCIe Extended Capabilities enumeration, Alexey Gerasimenko, 2018/03/12
- [Qemu-devel] [RFC PATCH 19/30] xen/pt: avoid reading PCIe device type and cap version multiple times, Alexey Gerasimenko, 2018/03/12
- [Qemu-devel] [RFC PATCH 20/30] xen/pt: determine the legacy/PCIe mode for a passed through device, Alexey Gerasimenko, 2018/03/12
- [Qemu-devel] [RFC PATCH 21/30] xen/pt: Xen PCIe passthrough support for Q35: bypass PCIe topology check, Alexey Gerasimenko, 2018/03/12
- [Qemu-devel] [RFC PATCH 22/30] xen/pt: add support for PCIe Extended Capabilities and larger config space, Alexey Gerasimenko, 2018/03/12
- [Qemu-devel] [RFC PATCH 23/30] xen/pt: handle PCIe Extended Capabilities Next register, Alexey Gerasimenko, 2018/03/12
- [Qemu-devel] [RFC PATCH 24/30] xen/pt: allow to hide PCIe Extended Capabilities, Alexey Gerasimenko, 2018/03/12
- [Qemu-devel] [RFC PATCH 25/30] xen/pt: add Vendor-specific PCIe Extended Capability descriptor and sizing, Alexey Gerasimenko, 2018/03/12
- [Qemu-devel] [RFC PATCH 26/30] xen/pt: add fixed-size PCIe Extended Capabilities descriptors, Alexey Gerasimenko, 2018/03/12
- [Qemu-devel] [RFC PATCH 27/30] xen/pt: add AER PCIe Extended Capability descriptor and sizing,
Alexey Gerasimenko <=
- [Qemu-devel] [RFC PATCH 28/30] xen/pt: add descriptors and size calculation for RCLD/ACS/PMUX/DPA/MCAST/TPH/DPC PCIe Extended Capabilities, Alexey Gerasimenko, 2018/03/12
- [Qemu-devel] [RFC PATCH 29/30] xen/pt: add Resizable BAR PCIe Extended Capability descriptor and sizing, Alexey Gerasimenko, 2018/03/12
- [Qemu-devel] [RFC PATCH 30/30] xen/pt: add VC/VC9/MFVC PCIe Extended Capabilities descriptors and sizing, Alexey Gerasimenko, 2018/03/12
- Re: [Qemu-devel] [RFC PATCH 00/30] Xen Q35 Bringup patches + support for PCIe Extended Capabilities for passed through devices, Daniel P . Berrangé, 2018/03/13