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Date:   Mon, 21 Jan 2019 10:19:50 +0100
From:   Borislav Petkov <bp@alien8.de>
To:     Chao Fan <fanc.fnst@cn.fujitsu.com>
Cc:     Kairui Song <kasong@redhat.com>, linux-kernel@vger.kernel.org,
        tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com,
        x86@kernel.org, Dave Young <dyoung@redhat.com>,
        Baoquan He <bhe@redhat.com>, kexec@lists.infradead.org,
        akpm@linux-foundation.org, robert.moore@intel.com,
        erik.schmauss@intel.com, rafael.j.wysocki@intel.com,
        Len Brown <lenb@kernel.org>
Subject: Re: [PATCH v2 2/2] x86, kexec_file_load: make it work with
 efi=noruntime or efi=old_map
Message-ID: <20190121091939.GC29166@zn.tnic>
References: <20190115095834.22617-1-kasong@redhat.com>
 <20190115095834.22617-3-kasong@redhat.com>
 <20190115231005.GF6596@zn.tnic>
 <CACPcB9dYD2zR7ssXFibkefo3EZuvVnLegovwTMA8MaaLP1UsYQ@mail.gmail.com>
 <20190116094619.GB15409@zn.tnic>
 <CACPcB9d0dKLPmZ=b++m5LYRjFUCFyLL3deDBcS4m3N-UWZ_Hyw@mail.gmail.com>
 <20190118102636.GB622@zn.tnic>
 <20190121011830.GA1554@localhost.localdomain>
 <20190121082932.GA29166@zn.tnic>
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On Mon, Jan 21, 2019 at 04:43:52PM +0800, Chao Fan wrote:
> Since I didn't see where Xen to fill the value, if
> boot_params->acpi_rsdp_addr is filled before my code, I just need to
> read it. If when I try to read it but not found, then parse RSDP and
> fill the RSDP address to boot_params->acpi_rsdp_addr.

And you can't simply do:

	if (boot_params.acpi_rsdp_addr)
		return;

at the beginning of that function?

-- 
Regards/Gruss,
    Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.