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[PATCH 01/15] pcie: Set default and supported MaxReadReq to 512
From: |
Lukasz Maniak |
Subject: |
[PATCH 01/15] pcie: Set default and supported MaxReadReq to 512 |
Date: |
Thu, 7 Oct 2021 18:23:52 +0200 |
From: Knut Omang <knut.omang@oracle.com>
Make the default PCI Express Capability for PCIe devices set
MaxReadReq to 512. Tyipcal modern devices people would want to
emulate or simulate would want this. The previous value would
cause warnings from the root port driver on some kernels.
Signed-off-by: Knut Omang <knuto@ifi.uio.no>
---
hw/pci/pcie.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/hw/pci/pcie.c b/hw/pci/pcie.c
index 6e95d82903..c1a12f3744 100644
--- a/hw/pci/pcie.c
+++ b/hw/pci/pcie.c
@@ -62,8 +62,9 @@ pcie_cap_v1_fill(PCIDevice *dev, uint8_t port, uint8_t type,
uint8_t version)
* Functions conforming to the ECN, PCI Express Base
* Specification, Revision 1.1., or subsequent PCI Express Base
* Specification revisions.
+ * + set max payload size to 256, which seems to be a common value
*/
- pci_set_long(exp_cap + PCI_EXP_DEVCAP, PCI_EXP_DEVCAP_RBER);
+ pci_set_long(exp_cap + PCI_EXP_DEVCAP, PCI_EXP_DEVCAP_RBER | (0x1 &
PCI_EXP_DEVCAP_PAYLOAD));
pci_set_long(exp_cap + PCI_EXP_LNKCAP,
(port << PCI_EXP_LNKCAP_PN_SHIFT) |
@@ -179,6 +180,8 @@ int pcie_cap_init(PCIDevice *dev, uint8_t offset,
pci_set_long(exp_cap + PCI_EXP_DEVCAP2,
PCI_EXP_DEVCAP2_EFF | PCI_EXP_DEVCAP2_EETLPP);
+ pci_set_word(exp_cap + PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_READRQ_256B);
+
pci_set_word(dev->wmask + pos + PCI_EXP_DEVCTL2, PCI_EXP_DEVCTL2_EETLPPB);
if (dev->cap_present & QEMU_PCIE_EXTCAP_INIT) {
--
2.25.1
- [PATCH 00/15] hw/nvme: SR-IOV with Virtualization Enhancements, Lukasz Maniak, 2021/10/07
- [PATCH 09/15] hw/nvme: Implement the Function Level Reset, Lukasz Maniak, 2021/10/07
- [PATCH 12/15] hw/nvme: Initialize capability structures for primary/secondary controllers, Lukasz Maniak, 2021/10/07
- [PATCH 14/15] hw/nvme: Add support for the Virtualization Management command, Lukasz Maniak, 2021/10/07
- [PATCH 03/15] pcie: Add some SR/IOV API documentation in docs/pcie_sriov.txt, Lukasz Maniak, 2021/10/07
- [PATCH 07/15] hw/nvme: Add support for Secondary Controller List, Lukasz Maniak, 2021/10/07
- [PATCH 11/15] hw/nvme: Calculate BAR atributes in a function, Lukasz Maniak, 2021/10/07