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| author | Will Deacon <will.deacon@arm.com> | 2018-12-13 19:06:14 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-01-09 19:38:48 +0300 |
| commit | 7ec9ea679c96fcd3767c39d7943e45e51797fa85 (patch) | |
| tree | 883a8fb3355a7ba158a15f5e6706968bfaf9aba8 /virt/kvm/arm/vgic | |
| parent | ba77e8c7f7044394c213e1221e630943c3379a6b (diff) | |
| download | linux-7ec9ea679c96fcd3767c39d7943e45e51797fa85.tar.xz | |
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 'virt/kvm/arm/vgic')
0 files changed, 0 insertions, 0 deletions