linux-kernel - Re: [PATCH v4 08/21] KVM: selftests: Add a "struct kvm_mmu_arch arch" member to kvm

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Message-ID: <zeiyns2xhtw76xtmn3so2jiyvcakszb5p2p6fak3dm62szzxon@rxkwn7peicen>
Date: Fri, 2 Jan 2026 16:53:51 +0000
From: Yosry Ahmed <yosry.ahmed@...ux.dev>
To: Sean Christopherson <seanjc@...gle.com>
Cc: Paolo Bonzini <pbonzini@...hat.com>, Marc Zyngier <maz@...nel.org>, 
	Oliver Upton <oupton@...nel.org>, Tianrui Zhao <zhaotianrui@...ngson.cn>, 
	Bibo Mao <maobibo@...ngson.cn>, Huacai Chen <chenhuacai@...nel.org>, 
	Anup Patel <anup@...infault.org>, Paul Walmsley <pjw@...nel.org>, 
	Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, 
	Christian Borntraeger <borntraeger@...ux.ibm.com>, Janosch Frank <frankja@...ux.ibm.com>, 
	Claudio Imbrenda <imbrenda@...ux.ibm.com>, kvm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
	kvmarm@...ts.linux.dev, loongarch@...ts.linux.dev, kvm-riscv@...ts.infradead.org, 
	linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 08/21] KVM: selftests: Add a "struct kvm_mmu_arch
 arch" member to kvm_mmu

On Tue, Dec 30, 2025 at 03:01:37PM -0800, Sean Christopherson wrote:
> Add an arch structure+field in "struct kvm_mmu" so that architectures can
> track arch-specific information for a given MMU.
> 
> No functional change intended.
> 
> Signed-off-by: Sean Christopherson <seanjc@...gle.com>

Reviewed-by: Yosry Ahmed <yosry.ahmed@...ux.dev>

> ---
>  tools/testing/selftests/kvm/include/arm64/kvm_util_arch.h     | 2 ++
>  tools/testing/selftests/kvm/include/kvm_util.h                | 2 ++
>  tools/testing/selftests/kvm/include/loongarch/kvm_util_arch.h | 1 +
>  tools/testing/selftests/kvm/include/riscv/kvm_util_arch.h     | 1 +
>  tools/testing/selftests/kvm/include/s390/kvm_util_arch.h      | 1 +
>  tools/testing/selftests/kvm/include/x86/kvm_util_arch.h       | 2 ++
>  6 files changed, 9 insertions(+)
> 
> diff --git a/tools/testing/selftests/kvm/include/arm64/kvm_util_arch.h b/tools/testing/selftests/kvm/include/arm64/kvm_util_arch.h
> index b973bb2c64a6..4a2033708227 100644
> --- a/tools/testing/selftests/kvm/include/arm64/kvm_util_arch.h
> +++ b/tools/testing/selftests/kvm/include/arm64/kvm_util_arch.h
> @@ -2,6 +2,8 @@
>  #ifndef SELFTEST_KVM_UTIL_ARCH_H
>  #define SELFTEST_KVM_UTIL_ARCH_H
>  
> +struct kvm_mmu_arch {};
> +
>  struct kvm_vm_arch {
>  	bool	has_gic;
>  	int	gic_fd;
> diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing/selftests/kvm/include/kvm_util.h
> index 39558c05c0bf..c1497515fa6a 100644
> --- a/tools/testing/selftests/kvm/include/kvm_util.h
> +++ b/tools/testing/selftests/kvm/include/kvm_util.h
> @@ -92,6 +92,8 @@ struct kvm_mmu {
>  	bool pgd_created;
>  	uint64_t pgd;
>  	int pgtable_levels;
> +
> +	struct kvm_mmu_arch arch;
>  };
>  
>  struct kvm_vm {
> diff --git a/tools/testing/selftests/kvm/include/loongarch/kvm_util_arch.h b/tools/testing/selftests/kvm/include/loongarch/kvm_util_arch.h
> index e43a57d99b56..d5095900e442 100644
> --- a/tools/testing/selftests/kvm/include/loongarch/kvm_util_arch.h
> +++ b/tools/testing/selftests/kvm/include/loongarch/kvm_util_arch.h
> @@ -2,6 +2,7 @@
>  #ifndef SELFTEST_KVM_UTIL_ARCH_H
>  #define SELFTEST_KVM_UTIL_ARCH_H
>  
> +struct kvm_mmu_arch {};
>  struct kvm_vm_arch {};
>  
>  #endif  // SELFTEST_KVM_UTIL_ARCH_H
> diff --git a/tools/testing/selftests/kvm/include/riscv/kvm_util_arch.h b/tools/testing/selftests/kvm/include/riscv/kvm_util_arch.h
> index e43a57d99b56..d5095900e442 100644
> --- a/tools/testing/selftests/kvm/include/riscv/kvm_util_arch.h
> +++ b/tools/testing/selftests/kvm/include/riscv/kvm_util_arch.h
> @@ -2,6 +2,7 @@
>  #ifndef SELFTEST_KVM_UTIL_ARCH_H
>  #define SELFTEST_KVM_UTIL_ARCH_H
>  
> +struct kvm_mmu_arch {};
>  struct kvm_vm_arch {};
>  
>  #endif  // SELFTEST_KVM_UTIL_ARCH_H
> diff --git a/tools/testing/selftests/kvm/include/s390/kvm_util_arch.h b/tools/testing/selftests/kvm/include/s390/kvm_util_arch.h
> index e43a57d99b56..d5095900e442 100644
> --- a/tools/testing/selftests/kvm/include/s390/kvm_util_arch.h
> +++ b/tools/testing/selftests/kvm/include/s390/kvm_util_arch.h
> @@ -2,6 +2,7 @@
>  #ifndef SELFTEST_KVM_UTIL_ARCH_H
>  #define SELFTEST_KVM_UTIL_ARCH_H
>  
> +struct kvm_mmu_arch {};
>  struct kvm_vm_arch {};
>  
>  #endif  // SELFTEST_KVM_UTIL_ARCH_H
> diff --git a/tools/testing/selftests/kvm/include/x86/kvm_util_arch.h b/tools/testing/selftests/kvm/include/x86/kvm_util_arch.h
> index 972bb1c4ab4c..456e5ca170df 100644
> --- a/tools/testing/selftests/kvm/include/x86/kvm_util_arch.h
> +++ b/tools/testing/selftests/kvm/include/x86/kvm_util_arch.h
> @@ -10,6 +10,8 @@
>  
>  extern bool is_forced_emulation_enabled;
>  
> +struct kvm_mmu_arch {};
> +
>  struct kvm_vm_arch {
>  	vm_vaddr_t gdt;
>  	vm_vaddr_t tss;
> -- 
> 2.52.0.351.gbe84eed79e-goog
>