Re: [PATCH 1/6] KVM: PPC: booke: use vcpu reference from thread_struct

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On 21.08.2012, at 15:51, Bharat Bhushan wrote:

> Like other places, use thread_struct to get vcpu reference.

Please remove the definition of SPRN_SPRG_R/WVCPU as well.


Alex

> 
> Signed-off-by: Bharat Bhushan <bharat.bhushan@xxxxxxxxxxxxx>
> ---
> arch/powerpc/kernel/asm-offsets.c   |    2 +-
> arch/powerpc/kvm/booke_interrupts.S |    6 ++----
> 2 files changed, 3 insertions(+), 5 deletions(-)
> 
> diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c
> index 85b05c4..fbb999c 100644
> --- a/arch/powerpc/kernel/asm-offsets.c
> +++ b/arch/powerpc/kernel/asm-offsets.c
> @@ -116,7 +116,7 @@ int main(void)
> #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
> 	DEFINE(THREAD_KVM_SVCPU, offsetof(struct thread_struct, kvm_shadow_vcpu));
> #endif
> -#ifdef CONFIG_KVM_BOOKE_HV
> +#if defined(CONFIG_KVM) && defined(CONFIG_BOOKE)
> 	DEFINE(THREAD_KVM_VCPU, offsetof(struct thread_struct, kvm_vcpu));
> #endif
> 
> diff --git a/arch/powerpc/kvm/booke_interrupts.S b/arch/powerpc/kvm/booke_interrupts.S
> index bb46b32..ca16d57 100644
> --- a/arch/powerpc/kvm/booke_interrupts.S
> +++ b/arch/powerpc/kvm/booke_interrupts.S
> @@ -56,7 +56,8 @@
> _GLOBAL(kvmppc_handler_\ivor_nr)
> 	/* Get pointer to vcpu and record exit number. */
> 	mtspr	\scratch , r4
> -	mfspr	r4, SPRN_SPRG_RVCPU
> +	mfspr   r4, SPRN_SPRG_THREAD
> +	lwz     r4, THREAD_KVM_VCPU(r4)
> 	stw	r3, VCPU_GPR(R3)(r4)
> 	stw	r5, VCPU_GPR(R5)(r4)
> 	stw	r6, VCPU_GPR(R6)(r4)
> @@ -402,9 +403,6 @@ lightweight_exit:
> 	lwz	r8, kvmppc_booke_handlers@l(r8)
> 	mtspr	SPRN_IVPR, r8
> 
> -	/* Save vcpu pointer for the exception handlers. */
> -	mtspr	SPRN_SPRG_WVCPU, r4
> -
> 	lwz	r5, VCPU_SHARED(r4)
> 
> 	/* Can't switch the stack pointer until after IVPR is switched,
> -- 
> 1.7.0.4
> 
> 

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