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| author |   Alex Bennée <alex.bennee@linaro.org> | 2015-07-07 17:29:56 +0100 |
|---|---|---|
| committer |   Marc Zyngier <marc.zyngier@arm.com> | 2015-07-21 12:47:08 +0100 |
| commit | 56c7f5e77f797fd0dcf2376ce1496f4238e6be33 (patch) | |
| tree | f3e156fff0a95985c234ab004ebd1b21c2b9c637 /arch/arm/include/asm/kvm_host.h | |
| parent | KVM: arm: guest debug, add stub KVM_SET_GUEST_DEBUG ioctl (diff) | |
| download | linux-dev-56c7f5e77f797fd0dcf2376ce1496f4238e6be33.tar.xz linux-dev-56c7f5e77f797fd0dcf2376ce1496f4238e6be33.zip | |
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/arm/include/asm/kvm_host.h')
| -rw-r--r-- | arch/arm/include/asm/kvm_host.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h index e896d2c196e6..2b0bc8c57552 100644 --- a/arch/arm/include/asm/kvm_host.h +++ b/arch/arm/include/asm/kvm_host.h @@ -231,4 +231,8 @@ static inline void kvm_arch_sync_events(struct kvm *kvm) {} static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {} static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {} +static inline void kvm_arm_init_debug(void) {} +static inline void kvm_arm_setup_debug(struct kvm_vcpu *vcpu) {} +static inline void kvm_arm_clear_debug(struct kvm_vcpu *vcpu) {} + #endif /* __ARM_KVM_HOST_H__ */ |