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authorKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2015-06-29 14:01:13 -0400
committerStefano Stabellini <stefano.stabellini@eu.citrix.com>2015-09-10 16:46:25 +0000
commit6aa07b1494d2725f24af097ca19c750ac25a7c11 (patch)
tree73d13fed3f3f27e66399dea307b4615e3d2e4189 /hw/xen/xen_pt.c
parent54fd08136e4ac8b88b88b15c397010e3b0de379f (diff)
xen/pt: Use xen_host_pci_get_[byte|word] instead of dev.config
During init time we treat the dev.config area as a cache of the host view. However during execution time we treat it as guest view (by the generic PCI API). We need to sync Xen's code to the generic PCI API view. This is the first step by replacing all of the code that uses dev.config or pci_get_[byte|word] to get host value to actually use the xen_host_pci_get_[byte|word] functions. Interestingly in 'xen_pt_ptr_reg_init' we also needed to swap reg_field from uint32_t to uint8_t - since the access is only for one byte not four bytes. We can split this as a seperate patch however we would have to use a cast to thwart compiler warnings in the meantime. We also truncated 'flags' to 'flag' to make the code fit within the 80 characters. Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Diffstat (limited to 'hw/xen/xen_pt.c')
-rw-r--r--hw/xen/xen_pt.c24
1 files changed, 20 insertions, 4 deletions
diff --git a/hw/xen/xen_pt.c b/hw/xen/xen_pt.c
index 3b1544c422..1c84d3d22a 100644
--- a/hw/xen/xen_pt.c
+++ b/hw/xen/xen_pt.c
@@ -702,7 +702,7 @@ static int xen_pt_initfn(PCIDevice *d)
{
XenPCIPassthroughState *s = XEN_PT_DEVICE(d);
int rc = 0;
- uint8_t machine_irq = 0;
+ uint8_t machine_irq = 0, scratch;
uint16_t cmd = 0;
int pirq = XEN_PT_UNASSIGNED_PIRQ;
@@ -768,7 +768,12 @@ static int xen_pt_initfn(PCIDevice *d)
}
/* Bind interrupt */
- if (!s->dev.config[PCI_INTERRUPT_PIN]) {
+ rc = xen_host_pci_get_byte(&s->real_device, PCI_INTERRUPT_PIN, &scratch);
+ if (rc) {
+ XEN_PT_ERR(d, "Failed to read PCI_INTERRUPT_PIN! (rc:%d)\n", rc);
+ scratch = 0;
+ }
+ if (!scratch) {
XEN_PT_LOG(d, "no pin interrupt\n");
goto out;
}
@@ -818,8 +823,19 @@ static int xen_pt_initfn(PCIDevice *d)
out:
if (cmd) {
- xen_host_pci_set_word(&s->real_device, PCI_COMMAND,
- pci_get_word(d->config + PCI_COMMAND) | cmd);
+ uint16_t val;
+
+ rc = xen_host_pci_get_word(&s->real_device, PCI_COMMAND, &val);
+ if (rc) {
+ XEN_PT_ERR(d, "Failed to read PCI_COMMAND! (rc: %d)\n", rc);
+ } else {
+ val |= cmd;
+ rc = xen_host_pci_set_word(&s->real_device, PCI_COMMAND, val);
+ if (rc) {
+ XEN_PT_ERR(d, "Failed to write PCI_COMMAND val=0x%x!(rc: %d)\n",
+ val, rc);
+ }
+ }
}
memory_listener_register(&s->memory_listener, &s->dev.bus_master_as);