linux-kernel - Re: [PATCH v2 1/1] KVM: selftests: Adjust VM's initial stack address to align with SysV ABI spec

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Message-ID: <167969137156.2756401.15618241992481271147.b4-ty@google.com>
Date:   Fri, 24 Mar 2023 13:58:46 -0700
From:   Sean Christopherson <seanjc@...gle.com>
To:     Sean Christopherson <seanjc@...gle.com>, pbonzini@...hat.com,
        shuah@...nel.org, dmatlack@...gle.com, kvm@...r.kernel.org,
        linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org,
        Ackerley Tng <ackerleytng@...gle.com>
Cc:     erdemaktas@...gle.com, vannapurve@...gle.com, sagis@...gle.com,
        mail@...iej.szmigiero.name
Subject: Re: [PATCH v2 1/1] KVM: selftests: Adjust VM's initial stack address
 to align with SysV ABI spec

On Mon, 27 Feb 2023 18:06:01 +0000, Ackerley Tng wrote:
> Align the guest stack to match calling sequence requirements in
> section "The Stack Frame" of the System V ABI AMD64 Architecture
> Processor Supplement, which requires the value (%rsp + 8), NOT %rsp,
> to be a multiple of 16 when control is transferred to the function
> entry point. I.e. in a normal function call, %rsp needs to be 16-byte
> aligned _before_ CALL, not after.
> 
> [...]

Applied to kvm-x86 selftests, thanks!

[1/1] KVM: selftests: Adjust VM's initial stack address to align with SysV ABI spec
      https://github.com/kvm-x86/linux/commit/1982754bd2a7

--
https://github.com/kvm-x86/linux/tree/next
https://github.com/kvm-x86/linux/tree/fixes