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| author | Alex Bennée <alex.bennee@linaro.org> | 2015-07-07 19:29:56 +0300 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2015-07-21 14:47:08 +0300 |
| commit | 56c7f5e77f797fd0dcf2376ce1496f4238e6be33 (patch) | |
| tree | f3e156fff0a95985c234ab004ebd1b21c2b9c637 /arch/arm64/include/asm/kvm_asm.h | |
| parent | 0e6f07f29cfb8d79dbbdb12560a73f7121ba324e (diff) | |
| download | linux-56c7f5e77f797fd0dcf2376ce1496f4238e6be33.tar.xz | |
KVM: arm: introduce kvm_arm_init/setup/clear_debug
This is a precursor for later patches which will need to do more to
setup debug state before entering the hyp.S switch code. The existing
functionality for setting mdcr_el2 has been moved out of hyp.S and now
uses the value kept in vcpu->arch.mdcr_el2.
As the assembler used to previously mask and preserve MDCR_EL2.HPMN I've
had to add a mechanism to save the value of mdcr_el2 as a per-cpu
variable during the initialisation code. The kernel never sets this
number so we are assuming the bootcode has set up the correct value
here.
This also moves the conditional setting of the TDA bit from the hyp code
into the C code which is currently used for the lazy debug register
context switch code.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/kvm_asm.h')
| -rw-r--r-- | arch/arm64/include/asm/kvm_asm.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kvm_asm.h b/arch/arm64/include/asm/kvm_asm.h index 3c5fe685a2d6..f5e40dae291a 100644 --- a/arch/arm64/include/asm/kvm_asm.h +++ b/arch/arm64/include/asm/kvm_asm.h @@ -132,6 +132,8 @@ extern int __kvm_vcpu_run(struct kvm_vcpu *vcpu); extern u64 __vgic_v3_get_ich_vtr_el2(void); +extern u32 __kvm_get_mdcr_el2(void); + #endif #endif /* __ARM_KVM_ASM_H__ */ |