diff options
| author | Will Deacon <will.deacon@arm.com> | 2018-12-13 16:06:14 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-01-09 16:16:45 +0100 |
| commit | c1348e03c15be1ddb3f895fc4e32d40812493dc6 (patch) | |
| tree | 3ce6dab7fce602f7bc9bb7dc5220027f9bcb38d7 /mm/vmscan.c | |
| parent | 737dcb98a359e16bc03a2eef83fc5ec88b75e01c (diff) | |
arm64: KVM: Avoid setting the upper 32 bits of VTCR_EL2 to 1
commit df655b75c43fba0f2621680ab261083297fd6d16 upstream.
Although bit 31 of VTCR_EL2 is RES1, we inadvertently end up setting all
of the upper 32 bits to 1 as well because we define VTCR_EL2_RES1 as
signed, which is sign-extended when assigning to kvm->arch.vtcr.
Lucky for us, the architecture currently treats these upper bits as RES0
so, whilst we've been naughty, we haven't set fire to anything yet.
Cc: <stable@vger.kernel.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Christoffer Dall <christoffer.dall@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'mm/vmscan.c')
0 files changed, 0 insertions, 0 deletions