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From: Sean Christopherson <seanjc@google.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
	isaku.yamahata@intel.com, David Matlack <dmatlack@google.com>,
	peterx@redhat.com
Subject: Re: [PATCH 08/16] KVM: MMU: change handle_abnormal_pfn() arguments to kvm_page_fault
Date: Wed, 1 Sep 2021 23:15:39 +0000	[thread overview]
Message-ID: <YTAJm7c1a37N4adR@google.com> (raw)
In-Reply-To: <20210807134936.3083984-9-pbonzini@redhat.com>

On Sat, Aug 07, 2021, Paolo Bonzini wrote:
> Pass struct kvm_page_fault to handle_abnormal_pfn() instead of
> extracting the arguments from the struct.
> 
> Suggested-by: Isaku Yamahata <isaku.yamahata@intel.com>
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> ---
>  arch/x86/kvm/mmu/mmu.c         | 17 ++++++++---------
>  arch/x86/kvm/mmu/paging_tmpl.h |  2 +-
>  2 files changed, 9 insertions(+), 10 deletions(-)
> 
> diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
> index a6366f1c4197..cec59ac2e1cd 100644
> --- a/arch/x86/kvm/mmu/mmu.c
> +++ b/arch/x86/kvm/mmu/mmu.c
> @@ -3024,18 +3024,18 @@ static int kvm_handle_bad_page(struct kvm_vcpu *vcpu, gfn_t gfn, kvm_pfn_t pfn)
>  	return -EFAULT;
>  }
>  
> -static bool handle_abnormal_pfn(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
> -				kvm_pfn_t pfn, unsigned int access,
> -				int *ret_val)
> +static bool handle_abnormal_pfn(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault,
> +				unsigned int access, int *ret_val)
>  {
>  	/* The pfn is invalid, report the error! */
> -	if (unlikely(is_error_pfn(pfn))) {
> -		*ret_val = kvm_handle_bad_page(vcpu, gfn, pfn);
> +	if (unlikely(is_error_pfn(fault->pfn))) {
> +		*ret_val = kvm_handle_bad_page(vcpu, fault->gfn, fault->pfn);
>  		return true;
>  	}
>  
> -	if (unlikely(is_noslot_pfn(pfn))) {
> -		vcpu_cache_mmio_info(vcpu, gva, gfn,
> +	if (unlikely(is_noslot_pfn(fault->pfn))) {
> +		gva_t gva = fault->is_tdp ? 0 : fault->addr;

Checkpatch wants a newline.  I'm also surprised you didn't abuse bitwise math:

		gva_t gva = fault->addr & ((u64)fault->is_tdp - 1);

I am _not_ suggesting you actually do that ;-)

> +		vcpu_cache_mmio_info(vcpu, gva, fault->gfn,
>  				     access & shadow_mmio_access_mask);
>  		/*
>  		 * If MMIO caching is disabled, emulate immediately without

  reply	other threads:[~2021-09-01 23:15 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-07 13:49 [PATCH 00/16] KVM: x86: pass arguments on the page fault path via struct kvm_page_fault Paolo Bonzini
2021-08-07 13:49 ` [PATCH 01/16] KVM: MMU: pass unadulterated gpa to direct_page_fault Paolo Bonzini
2021-09-01 22:54   ` Sean Christopherson
2021-08-07 13:49 ` [PATCH 02/16] KVM: x86: clamp host mapping level to max_level in kvm_mmu_max_mapping_level Paolo Bonzini
2021-08-13 16:28   ` Sean Christopherson
2021-08-07 13:49 ` [PATCH 03/16] KVM: MMU: Introduce struct kvm_page_fault Paolo Bonzini
2021-08-07 13:49 ` [PATCH 04/16] KVM: MMU: change mmu->page_fault() arguments to kvm_page_fault Paolo Bonzini
2021-08-07 13:49 ` [PATCH 05/16] KVM: MMU: change direct_page_fault() " Paolo Bonzini
2021-08-07 13:49 ` [PATCH 06/16] KVM: MMU: change page_fault_handle_page_track() " Paolo Bonzini
2021-09-01 23:04   ` Sean Christopherson
2021-08-07 13:49 ` [PATCH 07/16] KVM: MMU: change try_async_pf() " Paolo Bonzini
2021-09-01 23:05   ` Sean Christopherson
2021-08-07 13:49 ` [PATCH 08/16] KVM: MMU: change handle_abnormal_pfn() " Paolo Bonzini
2021-09-01 23:15   ` Sean Christopherson [this message]
2021-08-07 13:49 ` [PATCH 09/16] KVM: MMU: change __direct_map() " Paolo Bonzini
2021-08-07 13:49 ` [PATCH 10/16] KVM: MMU: change FNAME(fetch)() " Paolo Bonzini
2021-08-07 13:49 ` [PATCH 11/16] KVM: MMU: change kvm_tdp_mmu_map() " Paolo Bonzini
2021-08-07 13:49 ` [PATCH 12/16] KVM: MMU: change tdp_mmu_map_handle_target_level() " Paolo Bonzini
2021-08-07 13:49 ` [PATCH 13/16] KVM: MMU: change fast_page_fault() " Paolo Bonzini
2021-08-07 13:49 ` [PATCH 14/16] KVM: MMU: change kvm_mmu_hugepage_adjust() " Paolo Bonzini
2021-08-07 13:49 ` [PATCH 15/16] KVM: MMU: change disallowed_hugepage_adjust() " Paolo Bonzini
2021-08-07 13:49 ` [PATCH 16/16] KVM: MMU: change tracepoints " Paolo Bonzini
2021-09-01 23:28   ` Sean Christopherson
2021-08-12 17:44 ` [PATCH 00/16] KVM: x86: pass arguments on the page fault path via struct kvm_page_fault David Matlack

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