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| author | Will Deacon <will.deacon@arm.com> | 2015-09-15 16:15:33 (GMT) |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2015-09-17 12:13:26 (GMT) |
| commit | 34c3faa353db8f5d3ce9966cf854d5643c64c4db (patch) | |
| tree | d07bdaf5bd1386587042fa31f9ecf06faeba888f /arch/arm64/kvm/hyp.S | |
| parent | 688bc577ac42ae3d07c889a1f0a72f0b23763d58 (diff) | |
| download | linux-34c3faa353db8f5d3ce9966cf854d5643c64c4db.tar.xz | |
arm64: KVM: Remove all traces of the ThumbEE registers
Although the ThumbEE registers and traps were present in earlier
versions of the v8 architecture, it was retrospectively removed and so
we can do the same.
Whilst this breaks migrating a guest started on a previous version of
the kernel, it is much better to kill these (non existent) registers
as soon as possible.
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
[maz: added commend about migration]
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm64/kvm/hyp.S')
| -rw-r--r-- | arch/arm64/kvm/hyp.S | 22 |
1 files changed, 4 insertions, 18 deletions
diff --git a/arch/arm64/kvm/hyp.S b/arch/arm64/kvm/hyp.S index 60a83e2..8563477 100644 --- a/arch/arm64/kvm/hyp.S +++ b/arch/arm64/kvm/hyp.S @@ -433,20 +433,13 @@ mrs x5, ifsr32_el2 stp x4, x5, [x3] - skip_fpsimd_state x8, 3f + skip_fpsimd_state x8, 2f mrs x6, fpexc32_el2 str x6, [x3, #16] -3: - skip_debug_state x8, 2f +2: + skip_debug_state x8, 1f mrs x7, dbgvcr32_el2 str x7, [x3, #24] -2: - skip_tee_state x8, 1f - - add x3, x2, #CPU_SYSREG_OFFSET(TEECR32_EL1) - mrs x4, teecr32_el1 - mrs x5, teehbr32_el1 - stp x4, x5, [x3] 1: .endm @@ -466,16 +459,9 @@ msr dacr32_el2, x4 msr ifsr32_el2, x5 - skip_debug_state x8, 2f + skip_debug_state x8, 1f ldr x7, [x3, #24] msr dbgvcr32_el2, x7 -2: - skip_tee_state x8, 1f - - add x3, x2, #CPU_SYSREG_OFFSET(TEECR32_EL1) - ldp x4, x5, [x3] - msr teecr32_el1, x4 - msr teehbr32_el1, x5 1: .endm |