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Message-ID: <20230918152110.GI13795@ziepe.ca>
Date: Mon, 18 Sep 2023 12:21:10 -0300
From: Jason Gunthorpe <jgg@...pe.ca>
To: Sean Christopherson <seanjc@...gle.com>
Cc: Catalin Marinas <catalin.marinas@....com>,
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Subject: Re: [PATCH 05/26] vfio: KVM: Pass get/put helpers from KVM to VFIO,
don't do circular lookup
On Fri, Sep 15, 2023 at 05:30:57PM -0700, Sean Christopherson wrote:
> Explicitly pass KVM's get/put helpers to VFIO when attaching a VM to
> VFIO instead of having VFIO do a symbol lookup back into KVM. Having both
> KVM and VFIO do symbol lookups increases the overall complexity and places
> an unnecessary dependency on KVM (from VFIO) without adding any value.
>
> Signed-off-by: Sean Christopherson <seanjc@...gle.com>
> ---
> drivers/vfio/vfio.h | 2 ++
> drivers/vfio/vfio_main.c | 74 +++++++++++++++++++---------------------
> include/linux/vfio.h | 4 ++-
> virt/kvm/vfio.c | 9 +++--
> 4 files changed, 47 insertions(+), 42 deletions(-)
I don't mind this, but Christoph had disliked my prior attempt to do
this with function pointers..
The get can be inlined, IIRC, what about putting a pointer to the put
inside the kvm struct?
The the normal kvm get/put don't have to exported symbols at all?
Jason
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