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From:   Thomas Gleixner <tglx@linutronix.de>
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To:     "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
        mingo@redhat.com, bp@alien8.de, dave.hansen@intel.com,
        luto@kernel.org, peterz@infradead.org
Cc:     sathyanarayanan.kuppuswamy@linux.intel.com, aarcange@redhat.com,
        ak@linux.intel.com, dan.j.williams@intel.com, david@redhat.com,
        hpa@zytor.com, jgross@suse.com, jmattson@google.com,
        joro@8bytes.org, jpoimboe@redhat.com, knsathya@kernel.org,
        pbonzini@redhat.com, sdeep@vmware.com, seanjc@google.com,
        tony.luck@intel.com, vkuznets@redhat.com, wanpengli@tencent.com,
        x86@kernel.org, linux-kernel@vger.kernel.org,
        "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>
Subject: Re: [PATCHv2 14/29] x86/tdx: Early boot handling of port I/O
In-Reply-To: <20220124150215.36893-15-kirill.shutemov@linux.intel.com>
References: <20220124150215.36893-1-kirill.shutemov@linux.intel.com>
 <20220124150215.36893-15-kirill.shutemov@linux.intel.com>
Date:   Wed, 02 Feb 2022 00:02:22 +0100
Message-ID: <875ypyxkap.ffs@tglx>
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X-Mailing-List: linux-kernel@vger.kernel.org

On Mon, Jan 24 2022 at 18:02, Kirill A. Shutemov wrote:
> This early handler enables the use of normal in*/out* macros without
> patching them for every driver. Since there is no expectation that
> early port I/O is performance-critical, the #VE emulation cost is worth
> the simplicity benefit of not patching the port I/O usage in early
> code. There are also no concerns with nesting, since there should be
> no NMIs or interrupts this early.
>
> Signed-off-by: Andi Kleen <ak@linux.intel.com>
> Reviewed-by: Dan Williams <dan.j.williams@intel.com>
> Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>

Reviewed-by: Thomas Gleixner <tglx@linutronix.de>