| commit | 8abce1e49c82599e6c8ced2d3276247b06148526 | |
| author | Marc Zyngier <marc.zyngier@arm.com> | |
| Tue, 6 Jun 2017 18:08:34 +0000 (6 19:08 +0100) | ||
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | |
| Wed, 14 Jun 2017 13:05:56 +0000 (14 15:05 +0200) | ||
| tree | a8caa1c448d427594d8f54cbed59926d37d87549 | treesnapshot (tar.gz zip) |
| parent | b9824dd75fcf6d9f10e8df08b237948d1802d5fe | commitdiff |
arm64: KVM: Allow unaligned accesses at EL2
commit 78fd6dcf11468a5a131b8365580d0c613bcc02cb upstream.
We currently have the SCTLR_EL2.A bit set, trapping unaligned accesses
at EL2, but we're not really prepared to deal with it. So far, this
has been unnoticed, until GCC 7 started emitting those (in particular
64bit writes on a 32bit boundary).
Since the rest of the kernel is pretty happy about that, let's follow
its example and set SCTLR_EL2.A to zero. Modern CPUs don't really
care.
Reported-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 78fd6dcf11468a5a131b8365580d0c613bcc02cb upstream.
We currently have the SCTLR_EL2.A bit set, trapping unaligned accesses
at EL2, but we're not really prepared to deal with it. So far, this
has been unnoticed, until GCC 7 started emitting those (in particular
64bit writes on a 32bit boundary).
Since the rest of the kernel is pretty happy about that, let's follow
its example and set SCTLR_EL2.A to zero. Modern CPUs don't really
care.
Reported-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| arch/arm64/kvm/hyp-init.S | diffblobblamehistory |