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x86/boot: Mostly revert commit ae7e1238e6 ("Add ACPI RSDP address to setup_header")

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Peter Anvin pointed out that commit:

  ae7e1238e6 ("x86/boot: Add ACPI RSDP address to setup_header")

should be reverted as setup_header should only contain items set by the
legacy BIOS.

So revert said commit. Instead of fully reverting the dependent commit
of:

  e7b66d16fe ("x86/acpi, x86/boot: Take RSDP address for boot params if available")

just remove the setup_header reference in order to replace it by
a boot_params in a followup patch.

Suggested-by: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: boris.ostrovsky@oracle.com
Cc: bp@alien8.de
Cc: daniel.kiper@oracle.com
Cc: sstabellini@kernel.org
Cc: xen-devel@lists.xenproject.org
Link: http://lkml.kernel.org/r/20181120072529.5489-2-jgross@suse.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Juergen Gross
2018-11-20 08:25:28 +01:00
committed by Ingo Molnar
parent d19f9130b8
commit 3841840449
8 changed files with 3 additions and 63 deletions
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17
arch/x86/kernel/setup.c
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@@ -1280,23 +1280,6 @@ void __init setup_arch(char **cmdline_p)
unwind_init();
}
/*
* From boot protocol 2.14 onwards we expect the bootloader to set the
* version to "0x8000 | <used version>". In case we find a version >= 2.14
* without the 0x8000 we assume the boot loader supports 2.13 only and
* reset the version accordingly. The 0x8000 flag is removed in any case.
*/
void __init x86_verify_bootdata_version(void)
{
if (boot_params.hdr.version & VERSION_WRITTEN)
boot_params.hdr.version &= ~VERSION_WRITTEN;
else if (boot_params.hdr.version >= 0x020e)
boot_params.hdr.version = 0x020d;
if (boot_params.hdr.version < 0x020e)
boot_params.hdr.acpi_rsdp_addr = 0;
}
#ifdef CONFIG_X86_32
static struct resource video_ram_resource = {