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| author | Victor Kamensky <victor.kamensky@linaro.org> | 2014-07-02 16:19:30 (GMT) |
|---|---|---|
| committer | Christoffer Dall <christoffer.dall@linaro.org> | 2014-07-11 11:57:43 (GMT) |
| commit | f0a3eaff71b8bd5d5acfda1f0cf3eedf49755622 (patch) | |
| tree | 151ffee47494baad44c4f6838219d4852579bf2d /arch/arm64/kvm/sys_regs.c | |
| parent | 26c99af1018c35020cfad1d20f02acb224807655 (diff) | |
| download | linux-f0a3eaff71b8bd5d5acfda1f0cf3eedf49755622.tar.xz | |
ARM64: KVM: fix big endian issue in access_vm_reg for 32bit guest
Fix issue with 32bit guests running on top of BE KVM host.
Indexes of high and low words of 64bit cp15 register are
swapped in case of big endian code, since 64bit cp15 state is
restored or saved with double word write or read instruction.
Define helper macro to access low words of 64bit cp15 register.
Signed-off-by: Victor Kamensky <victor.kamensky@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm64/kvm/sys_regs.c')
| -rw-r--r-- | arch/arm64/kvm/sys_regs.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index f0cecef..56288f3 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -134,13 +134,11 @@ static bool access_vm_reg(struct kvm_vcpu *vcpu, BUG_ON(!p->is_write); val = *vcpu_reg(vcpu, p->Rt); - if (!p->is_aarch32) { + if (!p->is_aarch32 || !p->is_32bit) vcpu_sys_reg(vcpu, r->reg) = val; - } else { - vcpu_cp15(vcpu, r->reg) = val & 0xffffffffUL; - if (!p->is_32bit) - vcpu_cp15(vcpu, r->reg + 1) = val >> 32; - } + else + vcpu_cp15_64_low(vcpu, r->reg) = val & 0xffffffffUL; + return true; } |