linux-kernel - Re: [RFC PATCH v5 006/104] KVM: TDX: Add placeholders for TDX VM/vcpu structure

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Sun, 13 Mar 2022 14:55:43 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     isaku.yamahata@...el.com, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     isaku.yamahata@...il.com, Jim Mattson <jmattson@...gle.com>,
        erdemaktas@...gle.com, Connor Kuehl <ckuehl@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>
Subject: Re: [RFC PATCH v5 006/104] KVM: TDX: Add placeholders for TDX VM/vcpu
 structure

On 3/4/22 20:48, isaku.yamahata@...el.com wrote:
> +void __init tdx_pre_kvm_init(unsigned int *vcpu_size,
> +			unsigned int *vcpu_align, unsigned int *vm_size)
> +{
> +	*vcpu_size = sizeof(struct vcpu_tdx);
> +	*vcpu_align = __alignof__(struct vcpu_tdx);
> +
> +	if (sizeof(struct kvm_tdx) > *vm_size)
> +		*vm_size = sizeof(struct kvm_tdx);
> +}

No need for this function, I would just do

	vcpu_size = max(sizeof vcpu_vmx, sizeof vcpu_tdx);
	vcpu_align = max(...);
	vt_x86_ops.vm_size = max(...);

in vt_init.

Paolo