linux-kernel - Re: [PATCH] KVM: x86: Explicitly zero-initialize on-stack CPUID unions

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Message-ID: <CALMp9eRZpj3UcwhsDrJ8T_BhQytSyaXtpwDMK_w2=-5xDut4qg@mail.gmail.com>
Date: Sat, 15 Mar 2025 01:59:14 -0700
From: Jim Mattson <jmattson@...gle.com>
To: Sean Christopherson <seanjc@...gle.com>
Cc: Paolo Bonzini <pbonzini@...hat.com>, kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] KVM: x86: Explicitly zero-initialize on-stack CPUID unions

On Fri, Mar 14, 2025 at 7:41 PM Sean Christopherson <seanjc@...gle.com> wrote:
>
> Explicitly zero/empty-initialize the unions used for PMU related CPUID
> entries, instead of manually zeroing all fields (hopefully), or in the
> case of 0x80000022, relying on the compiler to clobber the uninitialized
> bitfields.
>
> Signed-off-by: Sean Christopherson <seanjc@...gle.com>
Reviewed-by: Jim Mattson <jmattson@...gle.com>