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Date:   Fri, 5 Aug 2022 14:47:27 +0200
From:   "Jason A. Donenfeld" <Jason@zx2c4.com>
To:     Paolo Bonzini <pbonzini@redhat.com>
Cc:     qemu-devel@nongnu.org, Xiaoyao Li <xiaoyao.li@intel.com>,
        Richard Henderson <richard.henderson@linaro.org>,
        Peter Maydell <peter.maydell@linaro.org>,
        "Michael S . Tsirkin" <mst@redhat.com>,
        Daniel P =?utf-8?B?LiBCZXJyYW5nw6k=?= <berrange@redhat.com>,
        Gerd Hoffmann <kraxel@redhat.com>,
        Ard Biesheuvel <ardb@kernel.org>,
        Laszlo Ersek <lersek@redhat.com>, linux-efi@vger.kernel.org
Subject: Re: [PATCH v3] hw/i386: place setup_data at fixed place in memory
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Hi Paolo,

On Fri, Aug 05, 2022 at 10:10:02AM +0200, Paolo Bonzini wrote:
> On 8/5/22 01:04, Jason A. Donenfeld wrote:
> > +    /* Nothing else uses this part of the hardware mapped region */
> > +    setup_data_base = 0xfffff - 0x1000;
> 
> Isn't this where the BIOS lives?  I don't think this works.

That's the segment dedicated to ROM and hardware mapped addresses. So
that's a place to put ROM material. No actual software will use it.

Jason