On ARM64 Linux the HVC instruction is used to trap into Xen. As this can be set only at EL3, i.e. outside from Xen, document this boot requirement.
Signed-off-by: Dirk Behme <dirk.be...@de.bosch.com> --- docs/misc/arm/booting.txt | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/docs/misc/arm/booting.txt b/docs/misc/arm/booting.txt index 9802e5e..ffc9029 100644 --- a/docs/misc/arm/booting.txt +++ b/docs/misc/arm/booting.txt @@ -23,6 +23,10 @@ The exceptions to this on 32-bit ARM are as follows: There are no exception on 64-bit ARM. +On ARM64 Linux it has to be ensured that the Secure Configuration +Register has the HVC instructions enabled at EL1 and above +(SCR_EL3.HCE == 1). + [1] linux/Documentation/arm/Booting Latest version: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/arm/Booting -- 2.8.0 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
