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| author | Will Deacon <will.deacon@arm.com> | 2015-09-15 17:15:33 +0100 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2015-09-17 13:13:26 +0100 |
| commit | 34c3faa353db8f5d3ce9966cf854d5643c64c4db (patch) | |
| tree | d07bdaf5bd1386587042fa31f9ecf06faeba888f | |
| parent | 688bc577ac42ae3d07c889a1f0a72f0b23763d58 (diff) | |
| download | linux-34c3faa353db8f5d3ce9966cf854d5643c64c4db.tar.bz2 | |
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>
| -rw-r--r-- | arch/arm64/include/asm/kvm_arm.h | 1 | ||||
| -rw-r--r-- | arch/arm64/include/asm/kvm_asm.h | 4 | ||||
| -rw-r--r-- | arch/arm64/kvm/hyp.S | 22 | ||||
| -rw-r--r-- | arch/arm64/kvm/sys_regs.c | 7 |
4 files changed, 5 insertions, 29 deletions
diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h index cbc5e1a0ea8f..9694f2654593 100644 --- a/arch/arm64/include/asm/kvm_arm.h +++ b/arch/arm64/include/asm/kvm_arm.h @@ -172,7 +172,6 @@ #define VTTBR_VMID_MASK (UL(0xFF) << VTTBR_VMID_SHIFT) /* Hyp System Trap Register */ -#define HSTR_EL2_TTEE (1 << 16) #define HSTR_EL2_T(x) (1 << x) /* Hyp Coproccessor Trap Register Shifts */ diff --git a/arch/arm64/include/asm/kvm_asm.h b/arch/arm64/include/asm/kvm_asm.h index 67fa0de3d483..5e377101f919 100644 --- a/arch/arm64/include/asm/kvm_asm.h +++ b/arch/arm64/include/asm/kvm_asm.h @@ -53,9 +53,7 @@ #define IFSR32_EL2 25 /* Instruction Fault Status Register */ #define FPEXC32_EL2 26 /* Floating-Point Exception Control Register */ #define DBGVCR32_EL2 27 /* Debug Vector Catch Register */ -#define TEECR32_EL1 28 /* ThumbEE Configuration Register */ -#define TEEHBR32_EL1 29 /* ThumbEE Handler Base Register */ -#define NR_SYS_REGS 30 +#define NR_SYS_REGS 28 /* 32bit mapping */ #define c0_MPIDR (MPIDR_EL1 * 2) /* MultiProcessor ID Register */ diff --git a/arch/arm64/kvm/hyp.S b/arch/arm64/kvm/hyp.S index 60a83e2900a7..85634777e160 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 diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 1d0463e6a9e3..d03d3af17e7e 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -539,13 +539,6 @@ static const struct sys_reg_desc sys_reg_descs[] = { { Op0(0b10), Op1(0b000), CRn(0b0111), CRm(0b1110), Op2(0b110), trap_dbgauthstatus_el1 }, - /* TEECR32_EL1 */ - { Op0(0b10), Op1(0b010), CRn(0b0000), CRm(0b0000), Op2(0b000), - NULL, reset_val, TEECR32_EL1, 0 }, - /* TEEHBR32_EL1 */ - { Op0(0b10), Op1(0b010), CRn(0b0001), CRm(0b0000), Op2(0b000), - NULL, reset_val, TEEHBR32_EL1, 0 }, - /* MDCCSR_EL1 */ { Op0(0b10), Op1(0b011), CRn(0b0000), CRm(0b0001), Op2(0b000), trap_raz_wi }, |