Re: [Qemu-devel] [PATCH 3/6] Enable KVM for ppcemb.

[Anthony Liguori <anthony@codemonkey.ws>]

Hollis Blanchard wrote:
> Implement hooks called by generic KVM code.
>
> Also add code that will copy the host's CPU and timebase frequencies to the
> guest, which is necessary on KVM because the guest can directly access the
> timebase.
>
> Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
> ---
>  Makefile.target      |    3 +
>  configure            |    6 ++
>  target-ppc/helper.c  |    5 +
>  target-ppc/kvm.c     |  212 ++++++++++++++++++++++++++++++++++++++++++++++++++
>  target-ppc/kvm_ppc.c |  105 +++++++++++++++++++++++++
>  target-ppc/kvm_ppc.h |   15 ++++
>  6 files changed, 346 insertions(+), 0 deletions(-)
>  create mode 100644 target-ppc/kvm.c
>  create mode 100644 target-ppc/kvm_ppc.c
>  create mode 100644 target-ppc/kvm_ppc.h
>
> diff --git a/Makefile.target b/Makefile.target
> index 7152dff..d01231d 100644
> --- a/Makefile.target
> +++ b/Makefile.target
> @@ -652,6 +652,9 @@ OBJS+= heathrow_pic.o grackle_pci.o ppc_oldworld.o
>  OBJS+= unin_pci.o ppc_chrp.o
>  # PowerPC 4xx boards
>  OBJS+= pflash_cfi02.o ppc4xx_devs.o ppc4xx_pci.o ppc405_uc.o ppc405_boards.o
> +ifdef CONFIG_KVM
> +OBJS+= kvm_ppc.o
> +endif
>   

Shouldn't you be kvm.o?  If your file lives in target-ppc/kvm.c, it'll 
just work.

>  diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c
> new file mode 100644
> index 0000000..90b943b
> --- /dev/null
> +++ b/target-ppc/kvm.c
> @@ -0,0 +1,212 @@
> +int kvm_arch_put_registers(CPUState *env)
> +{
> +	struct kvm_regs regs;
> +	int ret;
> +	int i;
>   

Your indent is off.

> +int kvm_arch_get_registers(CPUState *env)
> +{
> +	struct kvm_regs regs;
> +	uint32_t i, ret;
> +
> +	ret = kvm_vcpu_ioctl(env, KVM_GET_REGS, &regs);
> +	if (ret < 0)
> +		return ret;
> +
> +	env->ctr = regs.ctr;
> +	env->lr = regs.lr;
> +	env->xer = regs.xer;
> +	env->msr = regs.msr;
> +	/* calculate hflags based on the current msr using the ppc qemu helper */
> +	hreg_compute_hflags(env);
>   

Do you need this?  Practically speaking, I don't even think we need to 
maintain them on x86 anymore.

> diff --git a/target-ppc/kvm_ppc.c b/target-ppc/kvm_ppc.c
> new file mode 100644
> index 0000000..b2b56df
> --- /dev/null
> +++ b/target-ppc/kvm_ppc.c
>   

Hence my confusion.  These are just kvm related helper?

I don't know that kvm_ppc.c is a very information name for this sort of 
stuff.  Since this is really host specific, not target specific, why not 
move it out of target-ppc.

Regards,

Anthony Liguori