From: Sheng Yang <sheng@linux.intel.com>
To: Avi Kivity <avi@redhat.com>,
Marcelo Tosatti <mtosatti@redhat.com>,
Anthony Liguori <anthony@codemonkey.ws>
Cc: kvm@vger.kernel.org, Sheng Yang <sheng@linux.intel.com>,
Allen Kay <allen.m.kay@intel.com>
Subject: [PATCH 05/16] Figure out device capability
Date: Tue, 17 Mar 2009 11:50:06 +0800 [thread overview]
Message-ID: <1237261817-27955-6-git-send-email-sheng@linux.intel.com> (raw)
In-Reply-To: <1237261817-27955-1-git-send-email-sheng@linux.intel.com>
Try to figure out device capability in update_dev_cap(). Now we are only care
about MSI capability.
The function pci_find_cap_offset original function wrote by Allen for Xen.
Notice the function need root privilege to work. This depends on libpci to work.
Signed-off-by: Allen Kay <allen.m.kay@intel.com>
Signed-off-by: Sheng Yang <sheng@linux.intel.com>
---
qemu/hw/device-assignment.c | 29 +++++++++++++++++++++++++++++
qemu/hw/device-assignment.h | 1 +
2 files changed, 30 insertions(+), 0 deletions(-)
diff --git a/qemu/hw/device-assignment.c b/qemu/hw/device-assignment.c
index 063e313..7c7ccb2 100644
--- a/qemu/hw/device-assignment.c
+++ b/qemu/hw/device-assignment.c
@@ -219,6 +219,35 @@ static void assigned_dev_ioport_map(PCIDevice *pci_dev, int region_num,
(r_dev->v_addrs + region_num));
}
+static uint8_t pci_find_cap_offset(struct pci_dev *pci_dev, uint8_t cap)
+{
+ int id;
+ int max_cap = 48;
+ int pos = PCI_CAPABILITY_LIST;
+ int status;
+
+ status = pci_read_byte(pci_dev, PCI_STATUS);
+ if ((status & PCI_STATUS_CAP_LIST) == 0)
+ return 0;
+
+ while (max_cap--) {
+ pos = pci_read_byte(pci_dev, pos);
+ if (pos < 0x40)
+ break;
+
+ pos &= ~3;
+ id = pci_read_byte(pci_dev, pos + PCI_CAP_LIST_ID);
+
+ if (id == 0xff)
+ break;
+ if (id == cap)
+ return pos;
+
+ pos += PCI_CAP_LIST_NEXT;
+ }
+ return 0;
+}
+
static void assigned_dev_pci_write_config(PCIDevice *d, uint32_t address,
uint32_t val, int len)
{
diff --git a/qemu/hw/device-assignment.h b/qemu/hw/device-assignment.h
index e648240..a676807 100644
--- a/qemu/hw/device-assignment.h
+++ b/qemu/hw/device-assignment.h
@@ -29,6 +29,7 @@
#define __DEVICE_ASSIGNMENT_H__
#include <sys/mman.h>
+#include <pci/pci.h>
#include "qemu-common.h"
#include "sys-queue.h"
#include "pci.h"
--
1.5.4.5
next prev parent reply other threads:[~2009-03-17 3:50 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-17 3:50 [PATCH 0/16 v6] Device assignment improvement in userspace Sheng Yang
2009-03-17 3:50 ` [PATCH 01/16] kvm: ioctl for KVM_ASSIGN_DEV_IRQ and KVM_DEASSIGN_DEV_IRQ Sheng Yang
2009-03-17 3:50 ` [PATCH 02/16] kvm: deassign irq for INTx Sheng Yang
2009-03-17 3:50 ` [PATCH 03/16] kvm: Replace force type convert with container_of() Sheng Yang
2009-03-17 3:50 ` [PATCH 04/16] Make device assignment depend on libpci Sheng Yang
2009-03-17 3:50 ` Sheng Yang [this message]
2009-03-17 3:50 ` [PATCH 06/16] Support for device capability Sheng Yang
2009-04-03 19:23 ` Alex Williamson
2009-04-07 5:54 ` Sheng Yang
2009-03-17 3:50 ` [PATCH 07/16] kvm: user interface for MSI type irq routing Sheng Yang
2009-03-17 3:50 ` [PATCH 08/16] kvm: libkvm: allocate unused gsi for " Sheng Yang
2009-03-17 3:50 ` [PATCH 09/16] kvm: expose MSI capability to guest Sheng Yang
2009-03-17 3:50 ` [PATCH 10/16] kvm: Support MSI convert to INTx in device assignment Sheng Yang
2009-03-17 3:50 ` [PATCH 11/16] Add MSI-X related macro to pci.c Sheng Yang
2009-03-17 3:50 ` [PATCH 12/16] kvm: add ioctl KVM_SET_MSIX_ENTRY_NR and KVM_SET_MSIX_ENTRY Sheng Yang
2009-03-17 3:50 ` [PATCH 13/16] kvm: enable MSI-X capabilty for assigned device Sheng Yang
2009-04-03 21:27 ` Alex Williamson
2009-04-07 6:09 ` Sheng Yang
2009-04-07 16:38 ` Alex Williamson
2009-04-08 2:26 ` Sheng Yang
2009-04-08 16:13 ` Alex Williamson
2009-04-09 1:31 ` Sheng Yang
2009-03-17 3:50 ` [PATCH 14/16] kvm: fix interrupt pin 0 assignment Sheng Yang
2009-03-17 3:50 ` [PATCH 15/16] KVM: Fill config with correct VID/DID Sheng Yang
2009-03-17 3:50 ` [PATCH 16/16] kvm: emulate command register for SRIOV virtual function Sheng Yang
2009-03-18 10:38 ` [PATCH 0/16 v6] Device assignment improvement in userspace Avi Kivity
-- strict thread matches above, loose matches on Subject: below --
2009-03-12 13:36 [PATCH 0/16 v5] " Sheng Yang
2009-03-12 13:36 ` [PATCH 05/16] Figure out device capability Sheng Yang
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