[Xen-changelog] [xen master] xen/arm: Blacklist sun7i UARTs

[patchbot@xxxxxxx]

commit 601ac1e216def3167fc208db1c80ddca6928e2c5
Author:     Ian Campbell <ian.campbell@xxxxxxxxxx>
AuthorDate: Fri Nov 1 14:03:11 2013 +0000
Commit:     Ian Campbell <ian.campbell@xxxxxxxxxx>
CommitDate: Tue Nov 5 11:33:47 2013 +0000

    xen/arm: Blacklist sun7i UARTs
    
    These are in the same page as the UART which is used as the Xen console. We 
are
    not currently smart enough to avoid passing them through to the guest,
    accidentally giving the guest access to the Xen console UART.
    
    we blacklist them all, if necessary in the future we can split the list into
    two halves and make a per platform decision about which half should be
    blacklisted on a given platform depending on which UART is wired up as the
    console.
    
    Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
    Acked-by: Julien Grall <julien.grall@xxxxxxxxxx>
---
 xen/arch/arm/platforms/sunxi.c |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/xen/arch/arm/platforms/sunxi.c b/xen/arch/arm/platforms/sunxi.c
index ab3b4a6..b466518 100644
--- a/xen/arch/arm/platforms/sunxi.c
+++ b/xen/arch/arm/platforms/sunxi.c
@@ -24,8 +24,19 @@ static const char * const sunxi_dt_compat[] __initconst =
     NULL
 };
 
+static const struct dt_device_match sunxi_blacklist_dev[] __initconst =
+{
+    /*
+     * The UARTs share a page which runs the risk of mapping the Xen console
+     * UART to dom0, so don't map any of them.
+     */
+    DT_MATCH_COMPATIBLE("snps,dw-apb-uart"),
+    { /* sentinel */ },
+};
+
 PLATFORM_START(sunxi, "Allwinner A20")
     .compatible = sunxi_dt_compat,
+    .blacklist_dev = sunxi_blacklist_dev,
 PLATFORM_END
 
 /*
--
generated by git-patchbot for /home/xen/git/xen.git#master

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