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Message-ID: <86802c441001121110u2f3dcfbpafb0d9c4bb6a4e4d@mail.gmail.com>
Date: Tue, 12 Jan 2010 11:10:19 -0800
From: Yinghai Lu <yinghai@...nel.org>
To: Suresh Siddha <suresh.b.siddha@...el.com>,
Ananth N Mavinakayanahalli <ananth@...ibm.com>
Cc: Ingo Molnar <mingo@...e.hu>,
Linus Torvalds <torvalds@...ux-foundation.org>,
lkml <linux-kernel@...r.kernel.org>,
"stable@...nel.org" <stable@...nel.org>,
"H. Peter Anvin" <hpa@...or.com>,
Thomas Gleixner <tglx@...utronix.de>,
"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>
Subject: Re: [PATCH] Make Intel 8-way Xeons boot again
if the system can not use logical flat.
should have some bit set in FADT...
static int physflat_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
{
#ifdef CONFIG_ACPI
/*
* Quirk: some x86_64 machines can only use physical APIC mode
* regardless of how many processors are present (x86_64 ES7000
* is an example).
*/
if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
(acpi_gbl_FADT.flags & ACPI_FADT_APIC_PHYSICAL)) {
printk(KERN_DEBUG "system APIC only can use physical flat");
return 1;
}
#endif
return 0;
}
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