libqos: Fix PC PCI endianness glitches

The libqos implementation of io_read{b,w,l} and io_write{b,w,l} hooks
was relying on qtest_mem{read,write}() respectively. With d81d410 (usb:
improve ehci/uhci test) this resulted in assertion failures on ppc hosts:

 ERROR:tests/usb-hcd-ehci-test.c:78:ehci_port_test: assertion failed: ((value & mask) == (expect & mask))

 ERROR:tests/usb-hcd-ehci-test.c:128:pci_uhci_port_2: assertion failed: (pcibus != NULL)

 ERROR:tests/usb-hcd-ehci-test.c:150:pci_ehci_port_2: assertion failed: (pcibus != NULL)

qtest_read{b,w,l,q}() and qtest_write{b,w,l,q}() had been introduced
as endian-safe replacement for qtest_mem{read,write}() in I2C in
872536b (qtest: Add MMIO support). Use them for PCI as well.

Cc: Anthony Liguori <[email protected]>
Cc: Gerd Hoffmann <[email protected]>
Fixes: c4efe1c qtest: add libqos including PCI support
Fixes: d81d410 usb: improve ehci/uhci test
Signed-off-by: Andreas Färber <[email protected]>
Reviewed-by: Paolo Bonzini <[email protected]>
Signed-off-by: Peter Maydell <[email protected]>

tests/libqos/pci-pc.c

@@ -41,7 +41,7 @@ static uint8_t qpci_pc_io_readb(QPCIBus *bus, void *addr)
     if (port < 0x10000) {
         value = inb(port);
     } else {
-        memread(port, &value, sizeof(value));
+        value = readb(port);
     }
 
     return value;
@@ -55,7 +55,7 @@ static uint16_t qpci_pc_io_readw(QPCIBus *bus, void *addr)
     if (port < 0x10000) {
         value = inw(port);
     } else {
-        memread(port, &value, sizeof(value));
+        value = readw(port);
     }
 
     return value;
@@ -69,7 +69,7 @@ static uint32_t qpci_pc_io_readl(QPCIBus *bus, void *addr)
     if (port < 0x10000) {
         value = inl(port);
     } else {
-        memread(port, &value, sizeof(value));
+        value = readl(port);
     }
 
     return value;
@@ -82,7 +82,7 @@ static void qpci_pc_io_writeb(QPCIBus *bus, void *addr, uint8_t value)
     if (port < 0x10000) {
         outb(port, value);
     } else {
-        memwrite(port, &value, sizeof(value));
+        writeb(port, value);
     }
 }
 
@@ -93,7 +93,7 @@ static void qpci_pc_io_writew(QPCIBus *bus, void *addr, uint16_t value)
     if (port < 0x10000) {
         outw(port, value);
     } else {
-        memwrite(port, &value, sizeof(value));
+        writew(port, value);
     }
 }
 
@@ -104,7 +104,7 @@ static void qpci_pc_io_writel(QPCIBus *bus, void *addr, uint32_t value)
     if (port < 0x10000) {
         outl(port, value);
     } else {
-        memwrite(port, &value, sizeof(value));
+        writel(port, value);
     }
 }