[Xen-devel] [PATCH] Remove support for out-of-date SLES9 and RHEL4 kernel ports from build integration

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

Both distros now include Xen support from their respective upstreams and these
kernels are very out of date wrt both the upstream distro kernel and the
upstream Xen kernel.

Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>

diff -r 6d41644623de -r 261a36c617df buildconfigs/mk.linux-2.6.5-SLES-xen
--- a/buildconfigs/mk.linux-2.6.5-SLES-xen      Mon Jul 20 10:58:06 2009 +0100
+++ /dev/null   Thu Jan 01 00:00:00 1970 +0000
@@ -1,10 +0,0 @@
-XEN_TARGET_ARCH = x86_32
-
-EXTRAVERSION = -xen
-LINUX_VER = 2.6.5-SLES
-
-XEN_LINUX_SOURCE = hg-clone
-XEN_LINUX_HGREPO ?= http://xenbits.xensource.com/kernels/sles9x.hg
-XEN_LINUX_HGREV  ?= tip
-
-include buildconfigs/mk.linux-2.6-xen
diff -r 6d41644623de -r 261a36c617df buildconfigs/mk.linux-2.6.9-RHEL-xen
--- a/buildconfigs/mk.linux-2.6.9-RHEL-xen      Mon Jul 20 10:58:06 2009 +0100
+++ /dev/null   Thu Jan 01 00:00:00 1970 +0000
@@ -1,10 +0,0 @@
-XEN_TARGET_ARCH = x86_32
-
-EXTRAVERSION = -xen
-LINUX_VER = 2.6.9-RHEL
-
-XEN_LINUX_SOURCE = hg-clone
-XEN_LINUX_HGREPO ?= http://xenbits.xensource.com/kernels/rhel4x.hg
-XEN_LINUX_HGREV  ?= tip
-
-include buildconfigs/mk.linux-2.6-xen
diff -r 6d41644623de -r 261a36c617df 
unmodified_drivers/linux-2.6/platform-pci/platform-pci.c
--- a/unmodified_drivers/linux-2.6/platform-pci/platform-pci.c  Mon Jul 20 
10:58:06 2009 +0100
+++ b/unmodified_drivers/linux-2.6/platform-pci/platform-pci.c  Mon Jul 20 
15:29:10 2009 +0100
@@ -257,6 +257,60 @@
 int xen_panic_handler_init(void);
 int gnttab_init(void);
 
+#define XEN_IOPORT_BASE 0x10
+
+#define XEN_IOPORT_PLATFLAGS   (XEN_IOPORT_BASE + 0) /* 1 byte access (R/W) */
+#define XEN_IOPORT_MAGIC       (XEN_IOPORT_BASE + 0) /* 2 byte access (R) */
+#define XEN_IOPORT_UNPLUG      (XEN_IOPORT_BASE + 0) /* 2 byte access (W) */
+#define XEN_IOPORT_DRVVER      (XEN_IOPORT_BASE + 0) /* 4 byte access (W) */
+
+#define XEN_IOPORT_SYSLOG      (XEN_IOPORT_BASE + 2) /* 1 byte access (W) */
+#define XEN_IOPORT_PROTOVER    (XEN_IOPORT_BASE + 2) /* 1 byte access (R) */
+#define XEN_IOPORT_PRODNUM     (XEN_IOPORT_BASE + 2) /* 2 byte access (W) */
+
+#define XEN_IOPORT_MAGIC_VAL 0x49d2
+#define XEN_IOPORT_LINUX_PRODNUM 0xffff /* NB: register a proper one */
+#define XEN_IOPORT_LINUX_DRVVER  ((LINUX_VERSION_CODE << 8) + 0x0)
+
+static int check_platform_magic(struct device *dev, long ioaddr, long iolen)
+{
+       short magic;
+       char protocol;
+
+       if (iolen < 0x16)
+               return -ENODEV;
+
+       magic = inw(XEN_IOPORT_MAGIC);
+
+       if (magic != XEN_IOPORT_MAGIC_VAL) {
+               dev_err(dev, "invalid magic %#x", magic);
+               return -ENODEV;
+       }
+
+       protocol = inb(XEN_IOPORT_PROTOVER);
+
+       dev_info(dev, "I/O protocol version %d\n", protocol);
+
+       switch (protocol) {
+       case 1:
+               outw(XEN_IOPORT_PRODNUM, 0xbeef);
+               outl(XEN_IOPORT_DRVVER, 0xdead);
+               if (inw(XEN_IOPORT_MAGIC) != XEN_IOPORT_MAGIC_VAL) {
+                       dev_err(dev, "blacklisted by host\n");
+                       return -ENODEV;
+               }
+               /* Fall through */
+       case 0:
+               outw(XEN_IOPORT_UNPLUG, 0xf);
+               break;
+       default:
+               dev_err(dev, "unknown qemu version\n");
+               return -ENODEV;
+       }
+
+       return 0;
+}
+
 static int __devinit platform_pci_init(struct pci_dev *pdev,
                                       const struct pci_device_id *ent)
 {
@@ -302,6 +356,10 @@
        platform_mmiolen = mmio_len;
 
        ret = init_hypercall_stubs();
+       if (ret < 0)
+               goto out;
+
+       ret = check_platform_magic(&pdev->dev, ioaddr, iolen);
        if (ret < 0)
                goto out;
 

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