From: Alexander Graf <agraf@suse.de>
To: Bharat Bhushan <Bharat.Bhushan@freescale.com>, kvm-ppc@vger.kernel.org
Cc: kvm@vger.kernel.org, scottwood@freescale.com, stuart.yoder@freescale.com
Subject: Re: [PATCH] kvm: ppc: bookehv: Save restore SPRN_SPRG9 on guest entry exit
Date: Thu, 17 Jul 2014 18:16:49 +0200 [thread overview]
Message-ID: <53C7F6F1.7000100@suse.de> (raw)
In-Reply-To: <1405489773-10822-1-git-send-email-Bharat.Bhushan@freescale.com>
On 16.07.14 07:49, Bharat Bhushan wrote:
> SPRN_SPRG is used by debug interrupt handler, so this is required
> for debug support.
>
> Signed-off-by: Bharat Bhushan <Bharat.Bhushan@freescale.com>
> ---
> arch/powerpc/include/asm/kvm_host.h | 1 +
> arch/powerpc/kernel/asm-offsets.c | 1 +
> arch/powerpc/kvm/bookehv_interrupts.S | 4 ++++
> 3 files changed, 6 insertions(+)
>
> diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
> index 372b977..f9e94ed 100644
> --- a/arch/powerpc/include/asm/kvm_host.h
> +++ b/arch/powerpc/include/asm/kvm_host.h
> @@ -588,6 +588,7 @@ struct kvm_vcpu_arch {
> u32 mmucfg;
> u32 eptcfg;
> u32 epr;
> + u32 sprg9;
u32? really?
Alex
> u32 pwrmgtcr0;
> u32 crit_save;
> /* guest debug registers*/
> diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c
> index 17ffcb4..ab9ae04 100644
> --- a/arch/powerpc/kernel/asm-offsets.c
> +++ b/arch/powerpc/kernel/asm-offsets.c
> @@ -668,6 +668,7 @@ int main(void)
> DEFINE(VCPU_LR, offsetof(struct kvm_vcpu, arch.lr));
> DEFINE(VCPU_CTR, offsetof(struct kvm_vcpu, arch.ctr));
> DEFINE(VCPU_PC, offsetof(struct kvm_vcpu, arch.pc));
> + DEFINE(VCPU_SPRG9, offsetof(struct kvm_vcpu, arch.sprg9));
> DEFINE(VCPU_LAST_INST, offsetof(struct kvm_vcpu, arch.last_inst));
> DEFINE(VCPU_FAULT_DEAR, offsetof(struct kvm_vcpu, arch.fault_dear));
> DEFINE(VCPU_FAULT_ESR, offsetof(struct kvm_vcpu, arch.fault_esr));
> diff --git a/arch/powerpc/kvm/bookehv_interrupts.S b/arch/powerpc/kvm/bookehv_interrupts.S
> index a1712b8..f45da85 100644
> --- a/arch/powerpc/kvm/bookehv_interrupts.S
> +++ b/arch/powerpc/kvm/bookehv_interrupts.S
> @@ -441,6 +441,7 @@ _GLOBAL(kvmppc_resume_host)
> #ifdef CONFIG_64BIT
> PPC_LL r3, PACA_SPRG_VDSO(r13)
> #endif
> + mfspr r5, SPRN_SPRG9
> PPC_STD(r6, VCPU_SHARED_SPRG4, r11)
> mfspr r8, SPRN_SPRG6
> PPC_STD(r7, VCPU_SHARED_SPRG5, r11)
> @@ -448,6 +449,7 @@ _GLOBAL(kvmppc_resume_host)
> #ifdef CONFIG_64BIT
> mtspr SPRN_SPRG_VDSO_WRITE, r3
> #endif
> + PPC_STD(r5, VCPU_SPRG9, r4)
> PPC_STD(r8, VCPU_SHARED_SPRG6, r11)
> mfxer r3
> PPC_STD(r9, VCPU_SHARED_SPRG7, r11)
> @@ -682,7 +684,9 @@ lightweight_exit:
> mtspr SPRN_SPRG5W, r6
> PPC_LD(r8, VCPU_SHARED_SPRG7, r11)
> mtspr SPRN_SPRG6W, r7
> + PPC_LD(r5, VCPU_SPRG9, r4)
> mtspr SPRN_SPRG7W, r8
> + mtspr SPRN_SPRG9, r5
>
> /* Load some guest volatiles. */
> PPC_LL r3, VCPU_LR(r4)
next prev parent reply other threads:[~2014-07-17 16:16 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-16 5:49 [PATCH] kvm: ppc: bookehv: Save restore SPRN_SPRG9 on guest entry exit Bharat Bhushan
2014-07-17 16:16 ` Alexander Graf [this message]
2014-07-17 16:26 ` Bharat.Bhushan
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