linux-kernel - Re: [BUG] can't boot up: unable to handle kernel paging request at ffffffffff340003

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Date:	Thu, 13 Feb 2014 10:55:47 +0000
From:	Matt Fleming <matt@...sole-pimps.org>
To:	Toshi Kani <toshi.kani@...com>
Cc:	Madper Xie <cxie@...hat.com>,
	Matt Fleming <matt.fleming@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Josh Triplett <josh@...htriplett.org>
Subject: Re: [BUG] can't boot up: unable to handle kernel paging request at
 ffffffffff340003

On Wed, 12 Feb, at 09:15:03AM, Toshi Kani wrote:
> 
> Hi Matt,
> 
> Yes, I agree that the table size should be 0x38.  However, ACPI spec
> states that bit0 of status indicates if the boot image graphic is valid.
> This bit is set to 0 (invalid) on the system.  Can you check this bit
> and return when invalid? 

Madper, could you try out this patch?

---

diff --git a/arch/x86/platform/efi/efi-bgrt.c b/arch/x86/platform/efi/efi-bgrt.c
index 4df9591eadad..f15103dff4b4 100644
--- a/arch/x86/platform/efi/efi-bgrt.c
+++ b/arch/x86/platform/efi/efi-bgrt.c
@@ -42,7 +42,7 @@ void __init efi_bgrt_init(void)
 
 	if (bgrt_tab->header.length < sizeof(*bgrt_tab))
 		return;
-	if (bgrt_tab->version != 1)
+	if (bgrt_tab->version != 1 || bgrt_tab->status != 1)
 		return;
 	if (bgrt_tab->image_type != 0 || !bgrt_tab->image_address)
 		return;

-- 
Matt Fleming, Intel Open Source Technology Center
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