[PATCH] efi_high_alloc: use EFI_ALLOCATE_MAX

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* [PATCH] efi_high_alloc: use EFI_ALLOCATE_MAX_ADDRESS
@ 2014-08-22 13:48 harald
  2014-08-25 10:34 ` Matt Fleming
  2014-08-25 11:55 ` [PATCH V2] " harald
  0 siblings, 2 replies; 7+ messages in thread
From: harald @ 2014-08-22 13:48 UTC (permalink / raw)
  To: linux-kernel; +Cc: Harald Hoyer

From: Harald Hoyer <harald@redhat.com>

On my Lenovo T420s with 4GB memory, efi_high_alloc() was checking the
following memory regions:

0x0000000000100000 - 0x0000000020000000
0x0000000020200000 - 0x0000000040000000
0x0000000040200000 - 0x00000000d2c02000
0x00000000d6e9f000 - 0x000000011e600000

and decided to allocate 2649 pages at address 0x11dba7000.
As I understand this is the physical address and this machine only
has 4GB mem!!

Nevertheless, unpacking of the initramfs later on failed.
This was mainly caused by commit 4bf7111f50167133a71c23530ca852a41355e739,
which enables loading the initramfs above 4G addresses.

With this patch efi_high_alloc() now uses EFI_ALLOCATE_MAX_ADDRESS.
This returns 0x00000000d2c02000 on my machine and the resulting
address at which the initramfs is loaded is then 0x00000000d21a9000,
which seems to work fine.

Signed-off-by: Harald Hoyer <harald@redhat.com>
---
 drivers/firmware/efi/libstub/efi-stub-helper.c | 75 ++++++--------------------
 1 file changed, 15 insertions(+), 60 deletions(-)

diff --git a/drivers/firmware/efi/libstub/efi-stub-helper.c b/drivers/firmware/efi/libstub/efi-stub-helper.c
index 32d5cca..700f2c4 100644
--- a/drivers/firmware/efi/libstub/efi-stub-helper.c
+++ b/drivers/firmware/efi/libstub/efi-stub-helper.c
@@ -118,82 +118,37 @@ efi_status_t efi_high_alloc(efi_system_table_t *sys_table_arg,
 			    unsigned long size, unsigned long align,
 			    unsigned long *addr, unsigned long max)
 {
-	unsigned long map_size, desc_size;
-	efi_memory_desc_t *map;
 	efi_status_t status;
 	unsigned long nr_pages;
 	u64 max_addr = 0;
-	int i;
-
-	status = efi_get_memory_map(sys_table_arg, &map, &map_size, &desc_size,
-				    NULL, NULL);
-	if (status != EFI_SUCCESS)
-		goto fail;
 
 	/*
 	 * Enforce minimum alignment that EFI requires when requesting
-	 * a specific address.  We are doing page-based allocations,
+	 * a specific address.	We are doing page-based allocations,
 	 * so we must be aligned to a page.
 	 */
 	if (align < EFI_PAGE_SIZE)
 		align = EFI_PAGE_SIZE;
 
-	nr_pages = round_up(size, EFI_PAGE_SIZE) / EFI_PAGE_SIZE;
-again:
-	for (i = 0; i < map_size / desc_size; i++) {
-		efi_memory_desc_t *desc;
-		unsigned long m = (unsigned long)map;
-		u64 start, end;
-
-		desc = (efi_memory_desc_t *)(m + (i * desc_size));
-		if (desc->type != EFI_CONVENTIONAL_MEMORY)
-			continue;
-
-		if (desc->num_pages < nr_pages)
-			continue;
-
-		start = desc->phys_addr;
-		end = start + desc->num_pages * (1UL << EFI_PAGE_SHIFT);
-
-		if ((start + size) > end || (start + size) > max)
-			continue;
-
-		if (end - size > max)
-			end = max;
-
-		if (round_down(end - size, align) < start)
-			continue;
-
-		start = round_down(end - size, align);
-
-		/*
-		 * Don't allocate at 0x0. It will confuse code that
-		 * checks pointers against NULL.
-		 */
-		if (start == 0x0)
-			continue;
+	nr_pages = round_up(size, align) / EFI_PAGE_SIZE;
+	max_addr = round_down(round_down((max_addr-size), align) + size, EFI_PAGE_SIZE);
 
-		if (start > max_addr)
-			max_addr = start;
-	}
+	/*
+	 * In case align > EFI_PAGE_SIZE, we need a little more space,
+	 * to round_up() later
+	 */
+	if (align > EFI_PAGE_SIZE)
+		nr_pages += round_up(align, EFI_PAGE_SIZE) / EFI_PAGE_SIZE;
 
-	if (!max_addr)
-		status = EFI_NOT_FOUND;
-	else {
-		status = efi_call_early(allocate_pages,
-					EFI_ALLOCATE_ADDRESS, EFI_LOADER_DATA,
-					nr_pages, &max_addr);
-		if (status != EFI_SUCCESS) {
-			max = max_addr;
-			max_addr = 0;
-			goto again;
-		}
+	status = efi_call_early(allocate_pages,
+				EFI_ALLOCATE_MAX_ADDRESS, EFI_LOADER_DATA,
+				nr_pages, &max_addr);
 
-		*addr = max_addr;
+	if (status == EFI_SUCCESS) {
+		*addr = max_addr - nr_pages * EFI_PAGE_SIZE;
+		*addr = round_up(*addr, align);
 	}
 
-	efi_call_early(free_pool, map);
-fail:
 	return status;
 }
 
-- 
2.1.0


^ permalink raw reply related	[flat|nested] 7+ messages in thread

* Re: [PATCH] efi_high_alloc: use EFI_ALLOCATE_MAX_ADDRESS
  2014-08-22 13:48 [PATCH] efi_high_alloc: use EFI_ALLOCATE_MAX_ADDRESS harald
@ 2014-08-25 10:34 ` Matt Fleming
  2014-08-25 11:10   ` Harald Hoyer
  2014-08-25 11:55 ` [PATCH V2] " harald
  1 sibling, 1 reply; 7+ messages in thread
From: Matt Fleming @ 2014-08-25 10:34 UTC (permalink / raw)
  To: harald; +Cc: linux-kernel, linux-efi

(Adding linux-efi to Cc)

On Fri, 22 Aug, at 03:48:23PM, harald@redhat.com wrote:
> From: Harald Hoyer <harald@redhat.com>
> 
> On my Lenovo T420s with 4GB memory, efi_high_alloc() was checking the
> following memory regions:
> 
> 0x0000000000100000 - 0x0000000020000000
> 0x0000000020200000 - 0x0000000040000000
> 0x0000000040200000 - 0x00000000d2c02000
> 0x00000000d6e9f000 - 0x000000011e600000
> 
> and decided to allocate 2649 pages at address 0x11dba7000.
> As I understand this is the physical address and this machine only
> has 4GB mem!!
 
Yeah, but RAM doesn't necessarily start at the physical address
0x000000000000. Nor is it necessarily contiguous.

In other words, it's perfectly legitimate to allocate at physical
addresses above 0x10000000 if the above memory map tells us RAM lives
there.

> Nevertheless, unpacking of the initramfs later on failed.
> This was mainly caused by commit 4bf7111f50167133a71c23530ca852a41355e739,
> which enables loading the initramfs above 4G addresses.
> 
> With this patch efi_high_alloc() now uses EFI_ALLOCATE_MAX_ADDRESS.
> This returns 0x00000000d2c02000 on my machine and the resulting
> address at which the initramfs is loaded is then 0x00000000d21a9000,
> which seems to work fine.

Well yeah, that makes sense because you've obviously got a buggy EFI
firmware that doesn't load things correctly above 4GB. It turns out that
this is a common bug.

Can you try the following patch and see whether booting with
efi=nochunk results in a functioning initramfs? I've had some success
with disabling the chunking workaround when reading files in the EFI
boot stub. Also, including a copy of a dmesg would be helpful.

---

>From 1c24a2bef39f041eb578189207240d0457ef0ac3 Mon Sep 17 00:00:00 2001
From: Matt Fleming <matt.fleming@intel.com>
Date: Tue, 5 Aug 2014 11:52:11 +0100
Subject: [PATCH] efi: Add efi= parameter parsing to the EFI boot stub

We need a way to customize the behaviour of the EFI boot stub, in
particular, we need a way to disable the "chunking" workaround, used
when reading files from the EFI System Partition.

One of my machines doesn't cope well when reading files in 1MB chunks to
a buffer above the 4GB mark - it appears that the "chunking" bug
workaround triggers another firmware bug. This was only discovered with
commit 4bf7111f5016 ("x86/efi: Support initrd loaded above 4G"), and
that commit is perfectly valid. The symptom I observed was a corrupt
initrd rather than any kind of crash.

efi= is now used to specify EFI parameters in two very different
execution environments, the EFI boot stub and during kernel boot.

There is also a slight performance optimization by enabling efi=nochunk,
but that's offset by the fact that you're more likely to run into
firmware issues, at least on x86. This is the rationale behind leaving
the workaround enabled by default.

Also provide some documentation for EFI_READ_CHUNK_SIZE and why we're
using the current value of 1MB.

Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Roy Franz <roy.franz@linaro.org>
Cc: Maarten Lankhorst <m.b.lankhorst@gmail.com>
Cc: Leif Lindholm <leif.lindholm@linaro.org>
Cc: Borislav Petkov <bp@suse.de>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
---
 Documentation/kernel-parameters.txt            |  5 ++-
 arch/x86/boot/compressed/eboot.c               |  4 ++
 arch/x86/platform/efi/efi.c                    | 19 +++++++-
 drivers/firmware/efi/libstub/arm-stub.c        |  4 ++
 drivers/firmware/efi/libstub/efi-stub-helper.c | 62 +++++++++++++++++++++++++-
 include/linux/efi.h                            |  2 +
 6 files changed, 91 insertions(+), 5 deletions(-)

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 6eaa9cdb7094..7c5fc8ec9be8 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -981,10 +981,13 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 			Format: {"off" | "on" | "skip[mbr]"}
 
 	efi=		[EFI]
-			Format: { "old_map" }
+			Format: { "old_map", "nochunk" }
 			old_map [X86-64]: switch to the old ioremap-based EFI
 			runtime services mapping. 32-bit still uses this one by
 			default.
+			nochunk: disable reading files in "chunks" in the EFI
+			boot stub, as chunking can cause problems with some
+			firmware implementations.
 
 	efi_no_storage_paranoia [EFI; X86]
 			Using this parameter you can use more than 50% of
diff --git a/arch/x86/boot/compressed/eboot.c b/arch/x86/boot/compressed/eboot.c
index f277184e2ac1..f4bdab1dbf66 100644
--- a/arch/x86/boot/compressed/eboot.c
+++ b/arch/x86/boot/compressed/eboot.c
@@ -1100,6 +1100,10 @@ struct boot_params *make_boot_params(struct efi_config *c)
 	else
 		initrd_addr_max = hdr->initrd_addr_max;
 
+	status = efi_parse_options(cmdline_ptr);
+	if (status != EFI_SUCCESS)
+		goto fail2;
+
 	status = handle_cmdline_files(sys_table, image,
 				      (char *)(unsigned long)hdr->cmd_line_ptr,
 				      "initrd=", initrd_addr_max,
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index 850da94fef30..a1f745b0bf1d 100644
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -943,8 +943,23 @@ static int __init parse_efi_cmdline(char *str)
 	if (*str == '=')
 		str++;
 
-	if (!strncmp(str, "old_map", 7))
-		set_bit(EFI_OLD_MEMMAP, &efi.flags);
+	while (*str) {
+		if (!strncmp(str, "old_map", 7)) {
+			set_bit(EFI_OLD_MEMMAP, &efi.flags);
+			str += strlen("old_map");
+		}
+
+		/*
+		 * Skip any options we don't understand. Presumably
+		 * they apply to the EFI boot stub.
+		 */
+		while (*str && *str != ',')
+			str++;
+
+		/* If we hit a delimiter, skip it */
+		if (*str == ',')
+			str++;
+	}
 
 	return 0;
 }
diff --git a/drivers/firmware/efi/libstub/arm-stub.c b/drivers/firmware/efi/libstub/arm-stub.c
index 480339b6b110..75ee05964cbc 100644
--- a/drivers/firmware/efi/libstub/arm-stub.c
+++ b/drivers/firmware/efi/libstub/arm-stub.c
@@ -226,6 +226,10 @@ unsigned long __init efi_entry(void *handle, efi_system_table_t *sys_table,
 		goto fail_free_image;
 	}
 
+	status = efi_parse_options(cmdline_ptr);
+	if (status != EFI_SUCCESS)
+		pr_efi_err(sys_table, "Failed to parse EFI cmdline options\n");
+
 	/*
 	 * Unauthenticated device tree data is a security hazard, so
 	 * ignore 'dtb=' unless UEFI Secure Boot is disabled.
diff --git a/drivers/firmware/efi/libstub/efi-stub-helper.c b/drivers/firmware/efi/libstub/efi-stub-helper.c
index 32d5cca30f49..a920fec8fe88 100644
--- a/drivers/firmware/efi/libstub/efi-stub-helper.c
+++ b/drivers/firmware/efi/libstub/efi-stub-helper.c
@@ -15,8 +15,23 @@
 
 #include "efistub.h"
 
+/*
+ * Some firmware implementations have problems reading files in one go.
+ * A read chunk size of 1MB seems to work for most platforms.
+ *
+ * Unfortunately, reading files in chunks triggers *other* bugs on some
+ * platforms, so we provide a way to disable this workaround, which can
+ * be done by passing "efi=nochunk" on the EFI boot stub command line.
+ *
+ * If you experience issues with initrd images being corrupt it's worth
+ * trying efi=nochunk, but chunking is enabled by default because there
+ * are far more machines that require the workaround than those that
+ * break with it enabled.
+ */
 #define EFI_READ_CHUNK_SIZE	(1024 * 1024)
 
+static unsigned long __chunk_size = EFI_READ_CHUNK_SIZE;
+
 struct file_info {
 	efi_file_handle_t *handle;
 	u64 size;
@@ -281,6 +296,49 @@ void efi_free(efi_system_table_t *sys_table_arg, unsigned long size,
 	efi_call_early(free_pages, addr, nr_pages);
 }
 
+/*
+ * Parse the ASCII string 'cmdline' for EFI options, denoted by the efi=
+ * option, e.g. efi=nochunk.
+ *
+ * It should be noted that efi= is parsed in two very different
+ * environments, first in the early boot environment of the EFI boot
+ * stub, and subsequently during the kernel boot.
+ */
+efi_status_t efi_parse_options(char *cmdline)
+{
+	char *str;
+
+	/*
+	 * If no EFI parameters were specified on the cmdline we've got
+	 * nothing to do.
+	 */
+	str = strstr(cmdline, "efi=");
+	if (!str)
+		return EFI_SUCCESS;
+
+	/* Skip ahead to first argument */
+	str += strlen("efi=");
+
+	/*
+	 * Remember, because efi= is also used by the kernel we need to
+	 * skip over arguments we don't understand.
+	 */
+	while (*str) {
+		if (!strncmp(str, "nochunk", 7)) {
+			str += strlen("nochunk");
+			__chunk_size = -1UL;
+		}
+
+		/* Group words together, delimited by "," */
+		while (*str && *str != ',')
+			str++;
+
+		if (*str == ',')
+			str++;
+	}
+
+	return EFI_SUCCESS;
+}
 
 /*
  * Check the cmdline for a LILO-style file= arguments.
@@ -423,8 +481,8 @@ efi_status_t handle_cmdline_files(efi_system_table_t *sys_table_arg,
 			size = files[j].size;
 			while (size) {
 				unsigned long chunksize;
-				if (size > EFI_READ_CHUNK_SIZE)
-					chunksize = EFI_READ_CHUNK_SIZE;
+				if (size > __chunk_size)
+					chunksize = __chunk_size;
 				else
 					chunksize = size;
 
diff --git a/include/linux/efi.h b/include/linux/efi.h
index efc681fd5895..0d37d3372d99 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -1208,4 +1208,6 @@ efi_status_t handle_cmdline_files(efi_system_table_t *sys_table_arg,
 				  unsigned long *load_addr,
 				  unsigned long *load_size);
 
+efi_status_t efi_parse_options(char *cmdline);
+
 #endif /* _LINUX_EFI_H */
-- 
1.9.3

-- 
Matt Fleming, Intel Open Source Technology Center

^ permalink raw reply related	[flat|nested] 7+ messages in thread

* Re: [PATCH] efi_high_alloc: use EFI_ALLOCATE_MAX_ADDRESS
  2014-08-25 10:34 ` Matt Fleming
@ 2014-08-25 11:10   ` Harald Hoyer
  0 siblings, 0 replies; 7+ messages in thread
From: Harald Hoyer @ 2014-08-25 11:10 UTC (permalink / raw)
  To: Matt Fleming; +Cc: linux-kernel, linux-efi

[-- Attachment #1: Type: text/plain, Size: 1857 bytes --]

On 25.08.2014 12:34, Matt Fleming wrote:
> (Adding linux-efi to Cc)
> 
> On Fri, 22 Aug, at 03:48:23PM, harald@redhat.com wrote:
>> From: Harald Hoyer <harald@redhat.com>
>>
>> On my Lenovo T420s with 4GB memory, efi_high_alloc() was checking the
>> following memory regions:
>>
>> 0x0000000000100000 - 0x0000000020000000
>> 0x0000000020200000 - 0x0000000040000000
>> 0x0000000040200000 - 0x00000000d2c02000
>> 0x00000000d6e9f000 - 0x000000011e600000
>>
>> and decided to allocate 2649 pages at address 0x11dba7000.
>> As I understand this is the physical address and this machine only
>> has 4GB mem!!
>  
> Yeah, but RAM doesn't necessarily start at the physical address
> 0x000000000000. Nor is it necessarily contiguous.
> 
> In other words, it's perfectly legitimate to allocate at physical
> addresses above 0x10000000 if the above memory map tells us RAM lives
> there.

yeah, I thought so, too :)

> 
>> Nevertheless, unpacking of the initramfs later on failed.
>> This was mainly caused by commit 4bf7111f50167133a71c23530ca852a41355e739,
>> which enables loading the initramfs above 4G addresses.
>>
>> With this patch efi_high_alloc() now uses EFI_ALLOCATE_MAX_ADDRESS.
>> This returns 0x00000000d2c02000 on my machine and the resulting
>> address at which the initramfs is loaded is then 0x00000000d21a9000,
>> which seems to work fine.
> 
> Well yeah, that makes sense because you've obviously got a buggy EFI
> firmware that doesn't load things correctly above 4GB. It turns out that
> this is a common bug.
> 
> Can you try the following patch and see whether booting with
> efi=nochunk results in a functioning initramfs? I've had some success
> with disabling the chunking workaround when reading files in the EFI
> boot stub. Also, including a copy of a dmesg would be helpful.
> 

Here we go... dmesg attached, but uncompression failed.


[-- Attachment #2: efi-dmesg.txt --]
[-- Type: text/plain, Size: 51535 bytes --]

[    0.000000] Initializing cgroup subsys cpuset
[    0.000000] Initializing cgroup subsys cpu
[    0.000000] Initializing cgroup subsys cpuacct
[    0.000000] Linux version 3.17.0-rc1+ (harald@lenovo) (gcc version 4.9.1 20140813 (Red Hat 4.9.1-7) (GCC) ) #25 SMP Mon Aug 25 12:49:05 CEST 2014
[    0.000000] Command line: initrd=\9e3d4b6532ff41e1ab40d6b4e5609907\3.17.0-0.rc1.git1.2.fc22.1.x86_64\initrd rw root=/dev/sda2 loglevel=7 efi=nochunk
[    0.000000] Disabled fast string operations
[    0.000000] e820: BIOS-provided physical RAM map:
[    0.000000] BIOS-e820: [mem 0x0000000000000000-0x0000000000057fff] usable
[    0.000000] BIOS-e820: [mem 0x0000000000058000-0x0000000000058fff] ACPI NVS
[    0.000000] BIOS-e820: [mem 0x0000000000059000-0x000000000009ffff] usable
[    0.000000] BIOS-e820: [mem 0x0000000000100000-0x000000001fffffff] usable
[    0.000000] BIOS-e820: [mem 0x0000000020000000-0x00000000201fffff] reserved
[    0.000000] BIOS-e820: [mem 0x0000000020200000-0x000000003fffffff] usable
[    0.000000] BIOS-e820: [mem 0x0000000040000000-0x00000000401fffff] reserved
[    0.000000] BIOS-e820: [mem 0x0000000040200000-0x00000000da89efff] usable
[    0.000000] BIOS-e820: [mem 0x00000000da89f000-0x00000000dae9efff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000dae9f000-0x00000000daf9efff] ACPI NVS
[    0.000000] BIOS-e820: [mem 0x00000000daf9f000-0x00000000daffefff] ACPI data
[    0.000000] BIOS-e820: [mem 0x00000000dafff000-0x00000000daffffff] usable
[    0.000000] BIOS-e820: [mem 0x00000000f80f8000-0x00000000f80f8fff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000fed1c000-0x00000000fed1ffff] reserved
[    0.000000] BIOS-e820: [mem 0x0000000100000000-0x000000011e5fffff] usable
[    0.000000] NX (Execute Disable) protection: active
[    0.000000] e820: update [mem 0xd6c84018-0xd6c94057] usable ==> usable
[    0.000000] extended physical RAM map:
[    0.000000] reserve setup_data: [mem 0x0000000000000000-0x0000000000057fff] usable
[    0.000000] reserve setup_data: [mem 0x0000000000058000-0x0000000000058fff] ACPI NVS
[    0.000000] reserve setup_data: [mem 0x0000000000059000-0x000000000009ffff] usable
[    0.000000] reserve setup_data: [mem 0x0000000000100000-0x000000001fffffff] usable
[    0.000000] reserve setup_data: [mem 0x0000000020000000-0x00000000201fffff] reserved
[    0.000000] reserve setup_data: [mem 0x0000000020200000-0x000000003fffffff] usable
[    0.000000] reserve setup_data: [mem 0x0000000040000000-0x00000000401fffff] reserved
[    0.000000] reserve setup_data: [mem 0x0000000040200000-0x00000000d6c84017] usable
[    0.000000] reserve setup_data: [mem 0x00000000d6c84018-0x00000000d6c94057] usable
[    0.000000] reserve setup_data: [mem 0x00000000d6c94058-0x00000000da89efff] usable
[    0.000000] reserve setup_data: [mem 0x00000000da89f000-0x00000000dae9efff] reserved
[    0.000000] reserve setup_data: [mem 0x00000000dae9f000-0x00000000daf9efff] ACPI NVS
[    0.000000] reserve setup_data: [mem 0x00000000daf9f000-0x00000000daffefff] ACPI data
[    0.000000] reserve setup_data: [mem 0x00000000dafff000-0x00000000daffffff] usable
[    0.000000] reserve setup_data: [mem 0x00000000f80f8000-0x00000000f80f8fff] reserved
[    0.000000] reserve setup_data: [mem 0x00000000fed1c000-0x00000000fed1ffff] reserved
[    0.000000] reserve setup_data: [mem 0x0000000100000000-0x000000011e5fffff] usable
[    0.000000] efi: EFI v2.00 by Lenovo
[    0.000000] efi:  ACPI=0xdaffe000  ACPI 2.0=0xdaffe014  SMBIOS=0xdae9e000 
[    0.000000] efi: mem00: type=3, attr=0xf, range=[0x0000000000000000-0x0000000000001000) (0MB)
[    0.000000] efi: mem01: type=2, attr=0xf, range=[0x0000000000001000-0x0000000000007000) (0MB)
[    0.000000] efi: mem02: type=7, attr=0xf, range=[0x0000000000007000-0x000000000004e000) (0MB)
[    0.000000] efi: mem03: type=3, attr=0xf, range=[0x000000000004e000-0x0000000000058000) (0MB)
[    0.000000] efi: mem04: type=10, attr=0xf, range=[0x0000000000058000-0x0000000000059000) (0MB)
[    0.000000] efi: mem05: type=7, attr=0xf, range=[0x0000000000059000-0x000000000005e000) (0MB)
[    0.000000] efi: mem06: type=4, attr=0xf, range=[0x000000000005e000-0x000000000005f000) (0MB)
[    0.000000] efi: mem07: type=3, attr=0xf, range=[0x000000000005f000-0x00000000000a0000) (0MB)
[    0.000000] efi: mem08: type=7, attr=0xf, range=[0x0000000000100000-0x0000000001000000) (15MB)
[    0.000000] efi: mem09: type=2, attr=0xf, range=[0x0000000001000000-0x000000000242c000) (20MB)
[    0.000000] efi: mem10: type=7, attr=0xf, range=[0x000000000242c000-0x0000000020000000) (475MB)
[    0.000000] efi: mem11: type=0, attr=0xf, range=[0x0000000020000000-0x0000000020200000) (2MB)
[    0.000000] efi: mem12: type=7, attr=0xf, range=[0x0000000020200000-0x0000000040000000) (510MB)
[    0.000000] efi: mem13: type=0, attr=0xf, range=[0x0000000040000000-0x0000000040200000) (2MB)
[    0.000000] efi: mem14: type=7, attr=0xf, range=[0x0000000040200000-0x00000000d365b000) (2356MB)
[    0.000000] efi: mem15: type=4, attr=0xf, range=[0x00000000d365b000-0x00000000d367b000) (0MB)
[    0.000000] efi: mem16: type=7, attr=0xf, range=[0x00000000d367b000-0x00000000d368b000) (0MB)
[    0.000000] efi: mem17: type=1, attr=0xf, range=[0x00000000d368b000-0x00000000d5ab7000) (36MB)
[    0.000000] efi: mem18: type=4, attr=0xf, range=[0x00000000d5ab7000-0x00000000d664b000) (11MB)
[    0.000000] efi: mem19: type=7, attr=0xf, range=[0x00000000d664b000-0x00000000d6c83000) (6MB)
[    0.000000] efi: mem20: type=2, attr=0xf, range=[0x00000000d6c83000-0x00000000d6c9f000) (0MB)
[    0.000000] efi: mem21: type=7, attr=0xf, range=[0x00000000d6c9f000-0x00000000d6e88000) (1MB)
[    0.000000] efi: mem22: type=1, attr=0xf, range=[0x00000000d6e88000-0x00000000d6e9f000) (0MB)
[    0.000000] efi: mem23: type=7, attr=0xf, range=[0x00000000d6e9f000-0x00000000d7b03000) (12MB)
[    0.000000] efi: mem24: type=4, attr=0xf, range=[0x00000000d7b03000-0x00000000d7b5b000) (0MB)
[    0.000000] efi: mem25: type=7, attr=0xf, range=[0x00000000d7b5b000-0x00000000d7b78000) (0MB)
[    0.000000] efi: mem26: type=4, attr=0xf, range=[0x00000000d7b78000-0x00000000d7b88000) (0MB)
[    0.000000] efi: mem27: type=7, attr=0xf, range=[0x00000000d7b88000-0x00000000d7b89000) (0MB)
[    0.000000] efi: mem28: type=4, attr=0xf, range=[0x00000000d7b89000-0x00000000d7b8a000) (0MB)
[    0.000000] efi: mem29: type=7, attr=0xf, range=[0x00000000d7b8a000-0x00000000d7b8b000) (0MB)
[    0.000000] efi: mem30: type=4, attr=0xf, range=[0x00000000d7b8b000-0x00000000d7b8c000) (0MB)
[    0.000000] efi: mem31: type=7, attr=0xf, range=[0x00000000d7b8c000-0x00000000d7b8e000) (0MB)
[    0.000000] efi: mem32: type=4, attr=0xf, range=[0x00000000d7b8e000-0x00000000d85ff000) (10MB)
[    0.000000] efi: mem33: type=7, attr=0xf, range=[0x00000000d85ff000-0x00000000d8602000) (0MB)
[    0.000000] efi: mem34: type=4, attr=0xf, range=[0x00000000d8602000-0x00000000d8606000) (0MB)
[    0.000000] efi: mem35: type=7, attr=0xf, range=[0x00000000d8606000-0x00000000d8607000) (0MB)
[    0.000000] efi: mem36: type=4, attr=0xf, range=[0x00000000d8607000-0x00000000d9e9f000) (24MB)
[    0.000000] efi: mem37: type=7, attr=0xf, range=[0x00000000d9e9f000-0x00000000da154000) (2MB)
[    0.000000] efi: mem38: type=3, attr=0xf, range=[0x00000000da154000-0x00000000da89f000) (7MB)
[    0.000000] efi: mem39: type=5, attr=0x800000000000000f, range=[0x00000000da89f000-0x00000000da9c2000) (1MB)
[    0.000000] efi: mem40: type=5, attr=0x800000000000000f, range=[0x00000000da9c2000-0x00000000daa9f000) (0MB)
[    0.000000] efi: mem41: type=6, attr=0x800000000000000f, range=[0x00000000daa9f000-0x00000000daca1000) (2MB)
[    0.000000] efi: mem42: type=6, attr=0x800000000000000f, range=[0x00000000daca1000-0x00000000dad9f000) (0MB)
[    0.000000] efi: mem43: type=0, attr=0xf, range=[0x00000000dad9f000-0x00000000dae21000) (0MB)
[    0.000000] efi: mem44: type=0, attr=0xf, range=[0x00000000dae21000-0x00000000dae9b000) (0MB)
[    0.000000] efi: mem45: type=0, attr=0xf, range=[0x00000000dae9b000-0x00000000dae9c000) (0MB)
[    0.000000] efi: mem46: type=0, attr=0xf, range=[0x00000000dae9c000-0x00000000dae9f000) (0MB)
[    0.000000] efi: mem47: type=10, attr=0xf, range=[0x00000000dae9f000-0x00000000daede000) (0MB)
[    0.000000] efi: mem48: type=10, attr=0xf, range=[0x00000000daede000-0x00000000daf9f000) (0MB)
[    0.000000] efi: mem49: type=9, attr=0xf, range=[0x00000000daf9f000-0x00000000dafdd000) (0MB)
[    0.000000] efi: mem50: type=9, attr=0xf, range=[0x00000000dafdd000-0x00000000dafff000) (0MB)
[    0.000000] efi: mem51: type=4, attr=0xf, range=[0x00000000dafff000-0x00000000db000000) (0MB)
[    0.000000] efi: mem52: type=7, attr=0xf, range=[0x0000000100000000-0x000000011dba7000) (475MB)
[    0.000000] efi: mem53: type=2, attr=0xf, range=[0x000000011dba7000-0x000000011e600000) (10MB)
[    0.000000] efi: mem54: type=11, attr=0x8000000000000001, range=[0x00000000f80f8000-0x00000000f80f9000) (0MB)
[    0.000000] efi: mem55: type=11, attr=0x8000000000000001, range=[0x00000000fed1c000-0x00000000fed20000) (0MB)
[    0.000000] SMBIOS 2.6 present.
[    0.000000] DMI: LENOVO 4174BH4/4174BH4, BIOS 8CET58WW (1.38 ) 07/18/2013
[    0.000000] e820: update [mem 0x00000000-0x00000fff] usable ==> reserved
[    0.000000] e820: remove [mem 0x000a0000-0x000fffff] usable
[    0.000000] e820: last_pfn = 0x11e600 max_arch_pfn = 0x400000000
[    0.000000] MTRR default type: uncachable
[    0.000000] MTRR fixed ranges enabled:
[    0.000000]   00000-9FFFF write-back
[    0.000000]   A0000-BFFFF uncachable
[    0.000000]   C0000-FFFFF write-protect
[    0.000000] MTRR variable ranges enabled:
[    0.000000]   0 base 0FFC00000 mask FFFC00000 write-protect
[    0.000000]   1 base 000000000 mask F80000000 write-back
[    0.000000]   2 base 080000000 mask FC0000000 write-back
[    0.000000]   3 base 0C0000000 mask FE0000000 write-back
[    0.000000]   4 base 0DC000000 mask FFC000000 uncachable
[    0.000000]   5 base 0DB000000 mask FFF000000 uncachable
[    0.000000]   6 base 100000000 mask FE0000000 write-back
[    0.000000]   7 base 11F000000 mask FFF000000 uncachable
[    0.000000]   8 base 11E800000 mask FFF800000 uncachable
[    0.000000]   9 base 11E600000 mask FFFE00000 uncachable
[    0.000000] x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106
[    0.000000] e820: last_pfn = 0xdb000 max_arch_pfn = 0x400000000
[    0.000000] Base memory trampoline at [ffff880000097000] 97000 size 24576
[    0.000000] reserving inaccessible SNB gfx pages
[    0.000000] init_memory_mapping: [mem 0x00000000-0x000fffff]
[    0.000000]  [mem 0x00000000-0x000fffff] page 4k
[    0.000000] BRK [0x02008000, 0x02008fff] PGTABLE
[    0.000000] BRK [0x02009000, 0x02009fff] PGTABLE
[    0.000000] BRK [0x0200a000, 0x0200afff] PGTABLE
[    0.000000] init_memory_mapping: [mem 0x11d800000-0x11d9fffff]
[    0.000000]  [mem 0x11d800000-0x11d9fffff] page 2M
[    0.000000] BRK [0x0200b000, 0x0200bfff] PGTABLE
[    0.000000] init_memory_mapping: [mem 0x11c000000-0x11d7fffff]
[    0.000000]  [mem 0x11c000000-0x11d7fffff] page 2M
[    0.000000] init_memory_mapping: [mem 0x100000000-0x11bffffff]
[    0.000000]  [mem 0x100000000-0x11bffffff] page 2M
[    0.000000] init_memory_mapping: [mem 0x00100000-0x1fffffff]
[    0.000000]  [mem 0x00100000-0x001fffff] page 4k
[    0.000000]  [mem 0x00200000-0x1fffffff] page 2M
[    0.000000] init_memory_mapping: [mem 0x20200000-0x3fffffff]
[    0.000000]  [mem 0x20200000-0x3fffffff] page 2M
[    0.000000] init_memory_mapping: [mem 0x40200000-0xda89efff]
[    0.000000]  [mem 0x40200000-0xda7fffff] page 2M
[    0.000000]  [mem 0xda800000-0xda89efff] page 4k
[    0.000000] BRK [0x0200c000, 0x0200cfff] PGTABLE
[    0.000000] BRK [0x0200d000, 0x0200dfff] PGTABLE
[    0.000000] init_memory_mapping: [mem 0xdafff000-0xdaffffff]
[    0.000000]  [mem 0xdafff000-0xdaffffff] page 4k
[    0.000000] init_memory_mapping: [mem 0x11da00000-0x11e5fffff]
[    0.000000]  [mem 0x11da00000-0x11e5fffff] page 2M
[    0.000000] RAMDISK: [mem 0x11dba7000-0x11e5fffff]
[    0.000000] ACPI: Early table checksum verification disabled
[    0.000000] ACPI: RSDP 0x00000000DAFFE014 000024 (v02 LENOVO)
[    0.000000] ACPI: XSDT 0x00000000DAFFE120 0000AC (v01 LENOVO TP-8C    00001380 PTEC 00000002)
[    0.000000] ACPI: FACP 0x00000000DAFE8000 0000F4 (v04 LENOVO TP-8C    00001380 PTL  00000002)
[    0.000000] ACPI: DSDT 0x00000000DAFEB000 00E55F (v01 LENOVO TP-8C    00001380 INTL 20061109)
[    0.000000] ACPI: FACS 0x00000000DAF2D000 000040
[    0.000000] ACPI: SLIC 0x00000000DAFFD000 000176 (v01 LENOVO TP-8C    00001380 PTEC 00000001)
[    0.000000] ACPI: SSDT 0x00000000DAFFC000 000249 (v01 LENOVO TP-SSDT2 00000200 INTL 20061109)
[    0.000000] ACPI: SSDT 0x00000000DAFFB000 000033 (v01 LENOVO TP-SSDT1 00000100 INTL 20061109)
[    0.000000] ACPI: SSDT 0x00000000DAFFA000 000797 (v01 LENOVO SataAhci 00001000 INTL 20061109)
[    0.000000] ACPI: HPET 0x00000000DAFE7000 000038 (v01 LENOVO TP-8C    00001380 PTL  00000002)
[    0.000000] ACPI: APIC 0x00000000DAFE6000 000098 (v01 LENOVO TP-8C    00001380 PTL  00000002)
[    0.000000] ACPI: MCFG 0x00000000DAFE5000 00003C (v01 LENOVO TP-8C    00001380 PTL  00000002)
[    0.000000] ACPI: ECDT 0x00000000DAFE4000 000052 (v01 LENOVO TP-8C    00001380 PTL  00000002)
[    0.000000] ACPI: ASF! 0x00000000DAFEA000 0000A5 (v32 LENOVO TP-8C    00001380 PTL  00000002)
[    0.000000] ACPI: TCPA 0x00000000DAFE3000 000032 (v02 PTL    LENOVO   06040000 LNVO 00000001)
[    0.000000] ACPI: SSDT 0x00000000DAFE2000 000A77 (v01 PmRef  Cpu0Ist  00003000 INTL 20061109)
[    0.000000] ACPI: SSDT 0x00000000DAFE1000 000996 (v01 PmRef  CpuPm    00003000 INTL 20061109)
[    0.000000] ACPI: DMAR 0x00000000DAFE0000 0000E8 (v01 INTEL  SNB      00000001 INTL 00000001)
[    0.000000] ACPI: UEFI 0x00000000DAFDF000 00003E (v01 LENOVO TP-8C    00001380 PTL  00000002)
[    0.000000] ACPI: UEFI 0x00000000DAFDE000 000042 (v01 PTL    COMBUF   00000001 PTL  00000001)
[    0.000000] ACPI: UEFI 0x00000000DAFDD000 000292 (v01 LENOVO TP-8C    00001380 PTL  00000002)
[    0.000000] ACPI: Local APIC address 0xfee00000
[    0.000000] No NUMA configuration found
[    0.000000] Faking a node at [mem 0x0000000000000000-0x000000011e5fffff]
[    0.000000] Initmem setup node 0 [mem 0x00000000-0x11e5fffff]
[    0.000000]   NODE_DATA [mem 0x11db93000-0x11dba6fff]
[    0.000000]  [ffffea0000000000-ffffea00047fffff] PMD -> [ffff880119000000-ffff88011cffffff] on node 0
[    0.000000] Zone ranges:
[    0.000000]   DMA      [mem 0x00001000-0x00ffffff]
[    0.000000]   DMA32    [mem 0x01000000-0xffffffff]
[    0.000000]   Normal   [mem 0x100000000-0x11e5fffff]
[    0.000000] Movable zone start for each node
[    0.000000] Early memory node ranges
[    0.000000]   node   0: [mem 0x00001000-0x00057fff]
[    0.000000]   node   0: [mem 0x00059000-0x0009ffff]
[    0.000000]   node   0: [mem 0x00100000-0x1fffffff]
[    0.000000]   node   0: [mem 0x20200000-0x3fffffff]
[    0.000000]   node   0: [mem 0x40200000-0xda89efff]
[    0.000000]   node   0: [mem 0xdafff000-0xdaffffff]
[    0.000000]   node   0: [mem 0x100000000-0x11e5fffff]
[    0.000000] On node 0 totalpages: 1018430
[    0.000000]   DMA zone: 64 pages used for memmap
[    0.000000]   DMA zone: 158 pages reserved
[    0.000000]   DMA zone: 3998 pages, LIFO batch:0
[    0.000000]   DMA32 zone: 13907 pages used for memmap
[    0.000000]   DMA32 zone: 890016 pages, LIFO batch:31
[    0.000000]   Normal zone: 1944 pages used for memmap
[    0.000000]   Normal zone: 124416 pages, LIFO batch:31
[    0.000000] Reserving Intel graphics stolen memory at 0xdba00000-0xdf9fffff
[    0.000000] ACPI: PM-Timer IO Port: 0x408
[    0.000000] ACPI: Local APIC address 0xfee00000
[    0.000000] ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x02] lapic_id[0x01] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x03] lapic_id[0x02] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x04] lapic_id[0x03] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x05] lapic_id[0x00] disabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x06] lapic_id[0x00] disabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x07] lapic_id[0x00] disabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x08] lapic_id[0x00] disabled)
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x00] high edge lint[0x1])
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x01] high edge lint[0x1])
[    0.000000] ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0])
[    0.000000] IOAPIC[0]: apic_id 2, version 32, address 0xfec00000, GSI 0-23
[    0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
[    0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
[    0.000000] ACPI: IRQ0 used by override.
[    0.000000] ACPI: IRQ9 used by override.
[    0.000000] Using ACPI (MADT) for SMP configuration information
[    0.000000] ACPI: HPET id: 0x8086a301 base: 0xfed00000
[    0.000000] smpboot: Allowing 8 CPUs, 4 hotplug CPUs
[    0.000000] PM: Registered nosave memory: [mem 0x00058000-0x00058fff]
[    0.000000] PM: Registered nosave memory: [mem 0x000a0000-0x000fffff]
[    0.000000] PM: Registered nosave memory: [mem 0x20000000-0x201fffff]
[    0.000000] PM: Registered nosave memory: [mem 0x40000000-0x401fffff]
[    0.000000] PM: Registered nosave memory: [mem 0xd6c84000-0xd6c84fff]
[    0.000000] PM: Registered nosave memory: [mem 0xd6c94000-0xd6c94fff]
[    0.000000] PM: Registered nosave memory: [mem 0xda89f000-0xdae9efff]
[    0.000000] PM: Registered nosave memory: [mem 0xdae9f000-0xdaf9efff]
[    0.000000] PM: Registered nosave memory: [mem 0xdaf9f000-0xdaffefff]
[    0.000000] PM: Registered nosave memory: [mem 0xdb000000-0xdb9fffff]
[    0.000000] PM: Registered nosave memory: [mem 0xdba00000-0xdf9fffff]
[    0.000000] PM: Registered nosave memory: [mem 0xdfa00000-0xf80f7fff]
[    0.000000] PM: Registered nosave memory: [mem 0xf80f8000-0xf80f8fff]
[    0.000000] PM: Registered nosave memory: [mem 0xf80f9000-0xfed1bfff]
[    0.000000] PM: Registered nosave memory: [mem 0xfed1c000-0xfed1ffff]
[    0.000000] PM: Registered nosave memory: [mem 0xfed20000-0xffffffff]
[    0.000000] e820: [mem 0xdfa00000-0xf80f7fff] available for PCI devices
[    0.000000] Booting paravirtualized kernel on bare hardware
[    0.000000] setup_percpu: NR_CPUS:8 nr_cpumask_bits:8 nr_cpu_ids:8 nr_node_ids:1
[    0.000000] PERCPU: Embedded 29 pages/cpu @ffff88011d600000 s88192 r8192 d22400 u262144
[    0.000000] pcpu-alloc: s88192 r8192 d22400 u262144 alloc=1*2097152
[    0.000000] pcpu-alloc: [0] 0 1 2 3 4 5 6 7 
[    0.000000] Built 1 zonelists in Node order, mobility grouping on.  Total pages: 1002357
[    0.000000] Policy zone: Normal
[    0.000000] Kernel command line: initrd=\9e3d4b6532ff41e1ab40d6b4e5609907\3.17.0-0.rc1.git1.2.fc22.1.x86_64\initrd rw root=/dev/sda2 loglevel=7 efi=nochunk
[    0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes)
[    0.000000] xsave: enabled xstate_bv 0x7, cntxt size 0x340 using standard form
[    0.000000] Memory: 3857352K/4073720K available (7412K kernel code, 1186K rwdata, 3228K rodata, 1440K init, 1460K bss, 216368K reserved)
[    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=8, Nodes=1
[    0.000000] Hierarchical RCU implementation.
[    0.000000] 	Offload RCU callbacks from all CPUs
[    0.000000] 	Offload RCU callbacks from CPUs: 0-7.
[    0.000000] NR_IRQS:4352 nr_irqs:488 0
[    0.000000] Console: colour dummy device 80x25
[    0.000000] console [tty0] enabled
[    0.000000] allocated 16777216 bytes of page_cgroup
[    0.000000] please try 'cgroup_disable=memory' option if you don't want memory cgroups
[    0.000000] hpet clockevent registered
[    0.000000] tsc: Fast TSC calibration using PIT
[    0.000000] tsc: Detected 2591.557 MHz processor
[    0.000033] Calibrating delay loop (skipped), value calculated using timer frequency.. 5183.11 BogoMIPS (lpj=2591557)
[    0.000038] pid_max: default: 32768 minimum: 301
[    0.000047] ACPI: Core revision 20140724
[    0.010286] ACPI: All ACPI Tables successfully acquired
[    0.012072] Security Framework initialized
[    0.012081] SELinux:  Initializing.
[    0.012088] SELinux:  Starting in permissive mode
[    0.012411] Dentry cache hash table entries: 524288 (order: 10, 4194304 bytes)
[    0.013394] Inode-cache hash table entries: 262144 (order: 9, 2097152 bytes)
[    0.013853] Mount-cache hash table entries: 8192 (order: 4, 65536 bytes)
[    0.013860] Mountpoint-cache hash table entries: 8192 (order: 4, 65536 bytes)
[    0.014066] Initializing cgroup subsys memory
[    0.014074] Initializing cgroup subsys devices
[    0.014078] Initializing cgroup subsys freezer
[    0.014080] Initializing cgroup subsys net_cls
[    0.014083] Initializing cgroup subsys blkio
[    0.014086] Initializing cgroup subsys perf_event
[    0.014089] Initializing cgroup subsys net_prio
[    0.014092] Initializing cgroup subsys hugetlb
[    0.014114] Disabled fast string operations
[    0.014117] CPU: Physical Processor ID: 0
[    0.014118] CPU: Processor Core ID: 0
[    0.014123] ENERGY_PERF_BIAS: Set to 'normal', was 'performance'
ENERGY_PERF_BIAS: View and update with x86_energy_perf_policy(8)
[    0.014128] mce: CPU supports 7 MCE banks
[    0.014139] CPU0: Thermal monitoring enabled (TM1)
[    0.014148] Last level iTLB entries: 4KB 512, 2MB 8, 4MB 8
Last level dTLB entries: 4KB 512, 2MB 32, 4MB 32, 1GB 0
[    0.014264] Freeing SMP alternatives memory: 28K (ffffffff81e92000 - ffffffff81e99000)
[    0.017160] ftrace: allocating 27086 entries in 106 pages
[    0.029222] dmar: Host address width 36
[    0.029227] dmar: DRHD base: 0x000000fed90000 flags: 0x0
[    0.029233] dmar: IOMMU 0: reg_base_addr fed90000 ver 1:0 cap c0000020e60262 ecap f0101a
[    0.029236] dmar: DRHD base: 0x000000fed91000 flags: 0x1
[    0.029240] dmar: IOMMU 1: reg_base_addr fed91000 ver 1:0 cap c9008020660262 ecap f0105a
[    0.029242] dmar: RMRR base: 0x000000dacd5000 end: 0x000000dacebfff
[    0.029245] dmar: RMRR base: 0x000000db800000 end: 0x000000df9fffff
[    0.029316] IOAPIC id 2 under DRHD base  0xfed91000 IOMMU 1
[    0.029318] HPET id 0 under DRHD base 0xfed91000
[    0.029319] HPET id 0 under DRHD base 0xfed91000
[    0.029321] HPET id 0 under DRHD base 0xfed91000
[    0.029322] HPET id 0 under DRHD base 0xfed91000
[    0.029323] HPET id 0 under DRHD base 0xfed91000
[    0.029325] HPET id 0 under DRHD base 0xfed91000
[    0.029326] HPET id 0 under DRHD base 0xfed91000
[    0.029328] HPET id 0 under DRHD base 0xfed91000
[    0.029329] Queued invalidation will be enabled to support x2apic and Intr-remapping.
[    0.029639] Enabled IRQ remapping in x2apic mode
[    0.029642] Enabling x2apic
[    0.029643] Enabled x2apic
[    0.029649] Switched APIC routing to cluster x2apic.
[    0.030116] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
[    0.040116] smpboot: CPU0: Intel(R) Core(TM) i5-2540M CPU @ 2.60GHz (fam: 06, model: 2a, stepping: 07)
[    0.040126] TSC deadline timer enabled
[    0.040148] Performance Events: PEBS fmt1+, 16-deep LBR, SandyBridge events, full-width counters, Intel PMU driver.
[    0.040169] ... version:                3
[    0.040170] ... bit width:              48
[    0.040172] ... generic registers:      4
[    0.040173] ... value mask:             0000ffffffffffff
[    0.040175] ... max period:             0000ffffffffffff
[    0.040176] ... fixed-purpose events:   3
[    0.040178] ... event mask:             000000070000000f
[    0.041606] x86: Booting SMP configuration:
[    0.041609] .... node  #0, CPUs:      #1
[    0.052635] Disabled fast string operations
[    0.054841] NMI watchdog: enabled on all CPUs, permanently consumes one hw-PMU counter.
[    0.054936]  #2
[    0.065961] Disabled fast string operations
[    0.068146]  #3
[    0.079171] Disabled fast string operations
[    0.081281] x86: Booted up 1 node, 4 CPUs
[    0.081288] smpboot: Total of 4 processors activated (20732.45 BogoMIPS)
[    0.084356] devtmpfs: initialized
[    0.086544] PM: Registering ACPI NVS region [mem 0x00058000-0x00058fff] (4096 bytes)
[    0.086548] PM: Registering ACPI NVS region [mem 0xdae9f000-0xdaf9efff] (1048576 bytes)
[    0.087338] atomic64_test: passed for x86-64 platform with CX8 and with SSE
[    0.087343] pinctrl core: initialized pinctrl subsystem
[    0.087380] RTC time: 11:02:38, date: 08/25/14
[    0.087457] NET: Registered protocol family 16
[    0.087590] cpuidle: using governor menu
[    0.087651] ACPI FADT declares the system doesn't support PCIe ASPM, so disable it
[    0.087654] ACPI: bus type PCI registered
[    0.087656] acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5
[    0.087894] PCI: MMCONFIG for domain 0000 [bus 00-3f] at [mem 0xf8000000-0xfbffffff] (base 0xf8000000)
[    0.087898] PCI: not using MMCONFIG
[    0.087900] PCI: Using configuration type 1 for base access
[    0.091593] ACPI: Added _OSI(Module Device)
[    0.091596] ACPI: Added _OSI(Processor Device)
[    0.091598] ACPI: Added _OSI(3.0 _SCP Extensions)
[    0.091600] ACPI: Added _OSI(Processor Aggregator Device)
[    0.092849] ACPI : EC: EC description table is found, configuring boot EC
[    0.096295] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored
[    0.105689] ACPI: Dynamic OEM Table Load:
[    0.105700] ACPI: SSDT 0xFFFF880117133000 0008C0 (v01 PmRef  Cpu0Cst  00003001 INTL 20061109)
[    0.108474] ACPI: Dynamic OEM Table Load:
[    0.108482] ACPI: SSDT 0xFFFF880117112C00 000303 (v01 PmRef  ApIst    00003000 INTL 20061109)
[    0.110413] ACPI: Dynamic OEM Table Load:
[    0.110420] ACPI: SSDT 0xFFFF880117140200 000119 (v01 PmRef  ApCst    00003000 INTL 20061109)
[    0.112784] ACPI: Interpreter enabled
[    0.112791] ACPI Exception: AE_NOT_FOUND, While evaluating Sleep State [\_S1_] (20140724/hwxface-580)
[    0.112796] ACPI Exception: AE_NOT_FOUND, While evaluating Sleep State [\_S2_] (20140724/hwxface-580)
[    0.112809] ACPI: (supports S0 S3 S4 S5)
[    0.112811] ACPI: Using IOAPIC for interrupt routing
[    0.112824] PCI: MMCONFIG for domain 0000 [bus 00-3f] at [mem 0xf8000000-0xfbffffff] (base 0xf8000000)
[    0.114616] PCI: MMCONFIG at [mem 0xf8000000-0xfbffffff] reserved in ACPI motherboard resources
[    0.114716] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
[    0.117219] ACPI: Power Resource [PUBS] (on)
[    0.117927] acpi PNP0C0A:01: ACPI dock station (docks/bays count: 1)
[    0.118683] acpi LNXIOBAY:00: ACPI dock station (docks/bays count: 2)
[    0.120669] ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 9 10 *11)
[    0.120724] ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 7 9 10 11) *0, disabled.
[    0.120776] ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 7 9 10 11) *0, disabled.
[    0.120828] ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 7 9 10 11) *0, disabled.
[    0.120879] ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 6 7 9 10 11) *0, disabled.
[    0.120930] ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 6 7 9 10 11) *0, disabled.
[    0.120981] ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 5 6 7 9 10 11) *0, disabled.
[    0.121032] ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 6 7 9 10 11) *0, disabled.
[    0.121110] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-fe])
[    0.121116] acpi PNP0A08:00: _OSC: OS supports [ExtendedConfig ASPM ClockPM Segments MSI]
[    0.121251] acpi PNP0A08:00: _OSC: platform does not support [PCIeCapability]
[    0.121320] acpi PNP0A08:00: _OSC: not requesting control; platform does not support [PCIeCapability]
[    0.121324] acpi PNP0A08:00: _OSC: OS requested [PCIeHotplug PME AER PCIeCapability]
[    0.121327] acpi PNP0A08:00: _OSC: platform willing to grant [PCIeHotplug PME AER]
[    0.121329] acpi PNP0A08:00: _OSC failed (AE_SUPPORT); disabling ASPM
[    0.121356] acpi PNP0A08:00: [Firmware Info]: MMCONFIG for domain 0000 [bus 00-3f] only partially covers this bridge
[    0.121475] PCI host bridge to bus 0000:00
[    0.121479] pci_bus 0000:00: root bus resource [bus 00-fe]
[    0.121481] pci_bus 0000:00: root bus resource [io  0x0000-0x0cf7]
[    0.121484] pci_bus 0000:00: root bus resource [io  0x0d00-0xffff]
[    0.121486] pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff]
[    0.121488] pci_bus 0000:00: root bus resource [mem 0xdfa00000-0xfebfffff]
[    0.121491] pci_bus 0000:00: root bus resource [mem 0xfed40000-0xfed4bfff]
[    0.121499] pci 0000:00:00.0: [8086:0104] type 00 class 0x060000
[    0.121575] pci 0000:00:02.0: [8086:0126] type 00 class 0x030000
[    0.121584] pci 0000:00:02.0: reg 0x10: [mem 0xf0000000-0xf03fffff 64bit]
[    0.121590] pci 0000:00:02.0: reg 0x18: [mem 0xe0000000-0xefffffff 64bit pref]
[    0.121593] pci 0000:00:02.0: reg 0x20: [io  0x4000-0x403f]
[    0.121686] pci 0000:00:16.0: [8086:1c3a] type 00 class 0x078000
[    0.121709] pci 0000:00:16.0: reg 0x10: [mem 0xf1625000-0xf162500f 64bit]
[    0.121784] pci 0000:00:16.0: PME# supported from D0 D3hot D3cold
[    0.121858] pci 0000:00:19.0: [8086:1502] type 00 class 0x020000
[    0.121875] pci 0000:00:19.0: reg 0x10: [mem 0xf1600000-0xf161ffff]
[    0.121884] pci 0000:00:19.0: reg 0x14: [mem 0xf162b000-0xf162bfff]
[    0.121892] pci 0000:00:19.0: reg 0x18: [io  0x4080-0x409f]
[    0.121954] pci 0000:00:19.0: PME# supported from D0 D3hot D3cold
[    0.121985] pci 0000:00:19.0: System wakeup disabled by ACPI
[    0.122030] pci 0000:00:1a.0: [8086:1c2d] type 00 class 0x0c0320
[    0.122051] pci 0000:00:1a.0: reg 0x10: [mem 0xf162a000-0xf162a3ff]
[    0.122140] pci 0000:00:1a.0: PME# supported from D0 D3hot D3cold
[    0.122176] pci 0000:00:1a.0: System wakeup disabled by ACPI
[    0.122219] pci 0000:00:1b.0: [8086:1c20] type 00 class 0x040300
[    0.122236] pci 0000:00:1b.0: reg 0x10: [mem 0xf1620000-0xf1623fff 64bit]
[    0.122313] pci 0000:00:1b.0: PME# supported from D0 D3hot D3cold
[    0.122350] pci 0000:00:1b.0: System wakeup disabled by ACPI
[    0.122394] pci 0000:00:1c.0: [8086:1c10] type 01 class 0x060400
[    0.122522] pci 0000:00:1c.0: PME# supported from D0 D3hot D3cold
[    0.122604] pci 0000:00:1c.1: [8086:1c12] type 01 class 0x060400
[    0.122741] pci 0000:00:1c.1: PME# supported from D0 D3hot D3cold
[    0.122824] pci 0000:00:1c.3: [8086:1c16] type 01 class 0x060400
[    0.122963] pci 0000:00:1c.3: PME# supported from D0 D3hot D3cold
[    0.123005] pci 0000:00:1c.3: System wakeup disabled by ACPI
[    0.123047] pci 0000:00:1c.4: [8086:1c18] type 01 class 0x060400
[    0.123183] pci 0000:00:1c.4: PME# supported from D0 D3hot D3cold
[    0.123227] pci 0000:00:1c.4: System wakeup disabled by ACPI
[    0.123272] pci 0000:00:1d.0: [8086:1c26] type 00 class 0x0c0320
[    0.123294] pci 0000:00:1d.0: reg 0x10: [mem 0xf1629000-0xf16293ff]
[    0.123386] pci 0000:00:1d.0: PME# supported from D0 D3hot D3cold
[    0.123418] pci 0000:00:1d.0: System wakeup disabled by ACPI
[    0.123460] pci 0000:00:1f.0: [8086:1c4f] type 00 class 0x060100
[    0.123623] pci 0000:00:1f.2: [8086:1c03] type 00 class 0x010601
[    0.123641] pci 0000:00:1f.2: reg 0x10: [io  0x40a8-0x40af]
[    0.123648] pci 0000:00:1f.2: reg 0x14: [io  0x40b4-0x40b7]
[    0.123656] pci 0000:00:1f.2: reg 0x18: [io  0x40a0-0x40a7]
[    0.123664] pci 0000:00:1f.2: reg 0x1c: [io  0x40b0-0x40b3]
[    0.123672] pci 0000:00:1f.2: reg 0x20: [io  0x4060-0x407f]
[    0.123679] pci 0000:00:1f.2: reg 0x24: [mem 0xf1628000-0xf16287ff]
[    0.123724] pci 0000:00:1f.2: PME# supported from D3hot
[    0.123785] pci 0000:00:1f.3: [8086:1c22] type 00 class 0x0c0500
[    0.123801] pci 0000:00:1f.3: reg 0x10: [mem 0xf1624000-0xf16240ff 64bit]
[    0.123821] pci 0000:00:1f.3: reg 0x20: [io  0xefa0-0xefbf]
[    0.123968] pci 0000:00:1c.0: PCI bridge to [bus 02]
[    0.124190] pci 0000:03:00.0: [8086:4238] type 00 class 0x028000
[    0.124384] pci 0000:03:00.0: reg 0x10: [mem 0xf1500000-0xf1501fff 64bit]
[    0.125086] pci 0000:03:00.0: PME# supported from D0 D3hot D3cold
[    0.127474] pci 0000:00:1c.1: PCI bridge to [bus 03]
[    0.127484] pci 0000:00:1c.1:   bridge window [mem 0xf1500000-0xf15fffff]
[    0.127595] acpiphp: Slot [1] registered
[    0.127828] pci 0000:05:00.0: [1180:e822] type 00 class 0x088000
[    0.127850] pci 0000:05:00.0: MMC controller base frequency changed to 50Mhz.
[    0.127877] pci 0000:05:00.0: reg 0x10: [mem 0xf0d00000-0xf0d000ff]
[    0.128090] pci 0000:05:00.0: supports D1 D2
[    0.128091] pci 0000:05:00.0: PME# supported from D0 D1 D2 D3hot D3cold
[    0.130669] pci 0000:00:1c.3: PCI bridge to [bus 05-0c]
[    0.130674] pci 0000:00:1c.3:   bridge window [io  0x3000-0x3fff]
[    0.130679] pci 0000:00:1c.3:   bridge window [mem 0xf0d00000-0xf14fffff]
[    0.130688] pci 0000:00:1c.3:   bridge window [mem 0xf0400000-0xf0bfffff 64bit pref]
[    0.130842] pci 0000:0d:00.0: [1033:0194] type 00 class 0x0c0330
[    0.130871] pci 0000:0d:00.0: reg 0x10: [mem 0xf0c00000-0xf0c01fff 64bit]
[    0.131017] pci 0000:0d:00.0: PME# supported from D0 D3hot D3cold
[    0.132474] pci 0000:00:1c.4: PCI bridge to [bus 0d]
[    0.132491] pci 0000:00:1c.4:   bridge window [mem 0xf0c00000-0xf0cfffff]
[    0.133557] ACPI: Enabled 4 GPEs in block 00 to 3F
[    0.133613] ACPI : EC: GPE = 0x11, I/O: command/status = 0x66, data = 0x62
[    0.133709] vgaarb: device added: PCI:0000:00:02.0,decodes=io+mem,owns=io+mem,locks=none
[    0.133714] vgaarb: loaded
[    0.133715] vgaarb: bridge control possible 0000:00:02.0
[    0.133785] SCSI subsystem initialized
[    0.133832] libata version 3.00 loaded.
[    0.133862] ACPI: bus type USB registered
[    0.133878] usbcore: registered new interface driver usbfs
[    0.133888] usbcore: registered new interface driver hub
[    0.133908] usbcore: registered new device driver usb
[    0.134003] PCI: Using ACPI for IRQ routing
[    0.135940] PCI: pci_cache_line_size set to 64 bytes
[    0.136387] e820: reserve RAM buffer [mem 0x00058000-0x0005ffff]
[    0.136389] e820: reserve RAM buffer [mem 0xd6c84018-0xd7ffffff]
[    0.136390] e820: reserve RAM buffer [mem 0xda89f000-0xdbffffff]
[    0.136391] e820: reserve RAM buffer [mem 0xdb000000-0xdbffffff]
[    0.136393] e820: reserve RAM buffer [mem 0x11e600000-0x11fffffff]
[    0.136504] NetLabel: Initializing
[    0.136506] NetLabel:  domain hash size = 128
[    0.136508] NetLabel:  protocols = UNLABELED CIPSOv4
[    0.136519] NetLabel:  unlabeled traffic allowed by default
[    0.136563] hpet0: at MMIO 0xfed00000, IRQs 2, 8, 0, 0, 0, 0, 0, 0
[    0.136569] hpet0: 8 comparators, 64-bit 14.318180 MHz counter
[    0.139604] Switched to clocksource hpet
[    0.145154] pnp: PnP ACPI init
[    0.145502] system 00:00: [mem 0x00000000-0x0009ffff] could not be reserved
[    0.145506] system 00:00: [mem 0x000c0000-0x000c3fff] could not be reserved
[    0.145509] system 00:00: [mem 0x000c4000-0x000c7fff] could not be reserved
[    0.145511] system 00:00: [mem 0x000c8000-0x000cbfff] has been reserved
[    0.145514] system 00:00: [mem 0x000cc000-0x000cffff] has been reserved
[    0.145516] system 00:00: [mem 0x000d0000-0x000d3fff] has been reserved
[    0.145518] system 00:00: [mem 0x000d4000-0x000d7fff] has been reserved
[    0.145521] system 00:00: [mem 0x000d8000-0x000dbfff] has been reserved
[    0.145523] system 00:00: [mem 0x000dc000-0x000dffff] has been reserved
[    0.145525] system 00:00: [mem 0x000e0000-0x000e3fff] has been reserved
[    0.145528] system 00:00: [mem 0x000e4000-0x000e7fff] has been reserved
[    0.145530] system 00:00: [mem 0x000e8000-0x000ebfff] has been reserved
[    0.145532] system 00:00: [mem 0x000ec000-0x000effff] has been reserved
[    0.145535] system 00:00: [mem 0x000f0000-0x000fffff] could not be reserved
[    0.145537] system 00:00: [mem 0x00100000-0xdf9fffff] could not be reserved
[    0.145540] system 00:00: [mem 0xfec00000-0xffffffff] could not be reserved
[    0.145544] system 00:00: Plug and Play ACPI device, IDs PNP0c01 (active)
[    0.145664] system 00:01: [io  0x0400-0x047f] could not be reserved
[    0.145667] system 00:01: [io  0x0500-0x057f] has been reserved
[    0.145669] system 00:01: [io  0x0800-0x080f] has been reserved
[    0.145671] system 00:01: [io  0x15e0-0x15ef] has been reserved
[    0.145674] system 00:01: [io  0x1600-0x167f] has been reserved
[    0.145677] system 00:01: [mem 0xf8000000-0xfbffffff] could not be reserved
[    0.145679] system 00:01: [mem 0x00000000-0x00000fff] could not be reserved
[    0.145682] system 00:01: [mem 0xfed1c000-0xfed1ffff] has been reserved
[    0.145684] system 00:01: [mem 0xfed10000-0xfed13fff] has been reserved
[    0.145686] system 00:01: [mem 0xfed18000-0xfed18fff] has been reserved
[    0.145689] system 00:01: [mem 0xfed19000-0xfed19fff] has been reserved
[    0.145691] system 00:01: [mem 0xfed45000-0xfed4bfff] has been reserved
[    0.145694] system 00:01: [mem 0xfed40000-0xfed44fff] has been reserved
[    0.145697] system 00:01: Plug and Play ACPI device, IDs PNP0c02 (active)
[    0.145740] pnp 00:02: Plug and Play ACPI device, IDs PNP0b00 (active)
[    0.145761] pnp 00:03: Plug and Play ACPI device, IDs PNP0303 (active)
[    0.145780] pnp 00:04: Plug and Play ACPI device, IDs LEN0015 PNP0f13 (active)
[    0.146198] pnp: PnP ACPI: found 5 devices
[    0.152673] pci 0000:00:1c.0: bridge window [io  0x1000-0x0fff] to [bus 02] add_size 1000
[    0.152676] pci 0000:00:1c.0: bridge window [mem 0x00100000-0x000fffff 64bit pref] to [bus 02] add_size 200000
[    0.152678] pci 0000:00:1c.0: bridge window [mem 0x00100000-0x000fffff] to [bus 02] add_size 200000
[    0.152716] pci 0000:00:1c.0: res[14]=[mem 0x00100000-0x000fffff] get_res_add_size add_size 200000
[    0.152718] pci 0000:00:1c.0: res[15]=[mem 0x00100000-0x000fffff 64bit pref] get_res_add_size add_size 200000
[    0.152720] pci 0000:00:1c.0: res[13]=[io  0x1000-0x0fff] get_res_add_size add_size 1000
[    0.152724] pci 0000:00:1c.0: BAR 14: assigned [mem 0xdfa00000-0xdfbfffff]
[    0.152729] pci 0000:00:1c.0: BAR 15: assigned [mem 0xdfc00000-0xdfdfffff 64bit pref]
[    0.152733] pci 0000:00:1c.0: BAR 13: assigned [io  0x2000-0x2fff]
[    0.152736] pci 0000:00:1c.0: PCI bridge to [bus 02]
[    0.152740] pci 0000:00:1c.0:   bridge window [io  0x2000-0x2fff]
[    0.152748] pci 0000:00:1c.0:   bridge window [mem 0xdfa00000-0xdfbfffff]
[    0.152754] pci 0000:00:1c.0:   bridge window [mem 0xdfc00000-0xdfdfffff 64bit pref]
[    0.152763] pci 0000:00:1c.1: PCI bridge to [bus 03]
[    0.152771] pci 0000:00:1c.1:   bridge window [mem 0xf1500000-0xf15fffff]
[    0.152783] pci 0000:00:1c.3: PCI bridge to [bus 05-0c]
[    0.152787] pci 0000:00:1c.3:   bridge window [io  0x3000-0x3fff]
[    0.152794] pci 0000:00:1c.3:   bridge window [mem 0xf0d00000-0xf14fffff]
[    0.152800] pci 0000:00:1c.3:   bridge window [mem 0xf0400000-0xf0bfffff 64bit pref]
[    0.152810] pci 0000:00:1c.4: PCI bridge to [bus 0d]
[    0.152817] pci 0000:00:1c.4:   bridge window [mem 0xf0c00000-0xf0cfffff]
[    0.152831] pci_bus 0000:00: resource 4 [io  0x0000-0x0cf7]
[    0.152832] pci_bus 0000:00: resource 5 [io  0x0d00-0xffff]
[    0.152834] pci_bus 0000:00: resource 6 [mem 0x000a0000-0x000bffff]
[    0.152835] pci_bus 0000:00: resource 7 [mem 0xdfa00000-0xfebfffff]
[    0.152837] pci_bus 0000:00: resource 8 [mem 0xfed40000-0xfed4bfff]
[    0.152838] pci_bus 0000:02: resource 0 [io  0x2000-0x2fff]
[    0.152840] pci_bus 0000:02: resource 1 [mem 0xdfa00000-0xdfbfffff]
[    0.152841] pci_bus 0000:02: resource 2 [mem 0xdfc00000-0xdfdfffff 64bit pref]
[    0.152843] pci_bus 0000:03: resource 1 [mem 0xf1500000-0xf15fffff]
[    0.152844] pci_bus 0000:05: resource 0 [io  0x3000-0x3fff]
[    0.152845] pci_bus 0000:05: resource 1 [mem 0xf0d00000-0xf14fffff]
[    0.152847] pci_bus 0000:05: resource 2 [mem 0xf0400000-0xf0bfffff 64bit pref]
[    0.152848] pci_bus 0000:0d: resource 1 [mem 0xf0c00000-0xf0cfffff]
[    0.152877] NET: Registered protocol family 2
[    0.153048] TCP established hash table entries: 32768 (order: 6, 262144 bytes)
[    0.153136] TCP bind hash table entries: 32768 (order: 7, 524288 bytes)
[    0.153230] TCP: Hash tables configured (established 32768 bind 32768)
[    0.153261] TCP: reno registered
[    0.153270] UDP hash table entries: 2048 (order: 4, 65536 bytes)
[    0.153287] UDP-Lite hash table entries: 2048 (order: 4, 65536 bytes)
[    0.153342] NET: Registered protocol family 1
[    0.153357] pci 0000:00:02.0: Boot video device
[    0.154879] PCI: CLS 64 bytes, default 64
[    0.154933] Unpacking initramfs...
[    0.160990] Initramfs unpacking failed: junk in compressed archive
[    0.163436] Freeing initrd memory: 10596K (ffff88011dba7000 - ffff88011e600000)
[    0.163472] PCI-DMA: Using software bounce buffering for IO (SWIOTLB)
[    0.163475] software IO TLB [mem 0xcf65b000-0xd365b000] (64MB) mapped at [ffff8800cf65b000-ffff8800d365afff]
[    0.163703] RAPL PMU detected, hw unit 2^-16 Joules, API unit is 2^-32 Joules, 3 fixed counters 163840 ms ovfl timer
[    0.164099] AVX version of gcm_enc/dec engaged.
[    0.164102] AES CTR mode by8 optimization enabled
[    0.164728] alg: No test for __gcm-aes-aesni (__driver-gcm-aes-aesni)
[    0.165187] futex hash table entries: 2048 (order: 5, 131072 bytes)
[    0.165222] Initialise system trusted keyring
[    0.165240] audit: initializing netlink subsys (disabled)
[    0.165256] audit: type=2000 audit(1408964558.153:1): initialized
[    0.165587] HugeTLB registered 2 MB page size, pre-allocated 0 pages
[    0.167051] zpool: loaded
[    0.167215] VFS: Disk quotas dquot_6.5.2
[    0.167251] Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[    0.167580] msgmni has been set to 7663
[    0.167651] Key type big_key registered
[    0.167654] SELinux:  Registering netfilter hooks
[    0.168545] alg: No test for stdrng (krng)
[    0.168556] NET: Registered protocol family 38
[    0.168563] Key type asymmetric registered
[    0.168566] Asymmetric key parser 'x509' registered
[    0.168612] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 252)
[    0.168656] io scheduler noop registered
[    0.168659] io scheduler deadline registered
[    0.168690] io scheduler cfq registered (default)
[    0.168778] pcieport 0000:00:1c.0: enabling device (0000 -> 0003)
[    0.169199] pci_hotplug: PCI Hot Plug PCI Core version: 0.5
[    0.169216] pciehp: PCI Express Hot Plug Controller Driver version: 0.4
[    0.169263] efifb: probing for efifb
[    0.169276] efifb: framebuffer at 0xe0000000, mapped to 0xffffc90004800000, using 1200k, total 1200k
[    0.169279] efifb: mode is 640x480x32, linelength=2560, pages=1
[    0.169281] efifb: scrolling: redraw
[    0.169283] efifb: Truecolor: size=8:8:8:8, shift=24:16:8:0
[    0.170020] Console: switching to colour frame buffer device 80x30
[    0.171063] fb0: EFI VGA frame buffer device
[    0.171470] intel_idle: MWAIT substates: 0x21120
[    0.171471] intel_idle: v0.4 model 0x2A
[    0.171472] intel_idle: lapic_timer_reliable_states 0xffffffff
[    0.172087] ACPI: AC Adapter [AC] (on-line)
[    0.172622] input: Lid Switch as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0D:00/input/input0
[    0.173771] ACPI: Lid Switch [LID]
[    0.174215] input: Sleep Button as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0E:00/input/input1
[    0.175064] ACPI: Sleep Button [SLPB]
[    0.175524] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input2
[    0.176386] ACPI: Power Button [PWRF]
[    0.178056] thermal LNXTHERM:00: registered as thermal_zone0
[    0.178486] ACPI: Thermal Zone [THM0] (56 C)
[    0.178948] GHES: HEST is not enabled!
[    0.179492] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[    0.180728] Non-volatile memory driver v1.3
[    0.181186] Linux agpgart interface v0.103
[    0.181799] ahci 0000:00:1f.2: version 3.0
[    0.181914] ahci 0000:00:1f.2: irq 26 for MSI/MSI-X
[    0.181960] ahci 0000:00:1f.2: SSS flag set, parallel bus scan disabled
[    0.192644] ahci 0000:00:1f.2: AHCI 0001.0300 32 slots 6 ports 6 Gbps 0x13 impl SATA mode
[    0.192880] ACPI: Battery Slot [BAT0] (battery present)
[    0.193941] ahci 0000:00:1f.2: flags: 64bit ncq sntf ilck stag pm led clo pio slum part ems sxs apst 
[    0.199165] scsi host0: ahci
[    0.199822] scsi host1: ahci
[    0.200406] scsi host2: ahci
[    0.200982] scsi host3: ahci
[    0.201539] scsi host4: ahci
[    0.202085] scsi host5: ahci
[    0.202493] ata1: SATA max UDMA/133 abar m2048@0xf1628000 port 0xf1628100 irq 26
[    0.203241] ata2: SATA max UDMA/133 abar m2048@0xf1628000 port 0xf1628180 irq 26
[    0.204021] ata3: DUMMY
[    0.204392] ata4: DUMMY
[    0.204761] ata5: SATA max UDMA/133 abar m2048@0xf1628000 port 0xf1628300 irq 26
[    0.205510] ata6: DUMMY
[    0.205965] libphy: Fixed MDIO Bus: probed
[    0.206416] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    0.206808] ehci-pci: EHCI PCI platform driver
[    0.207265] ehci-pci 0000:00:1a.0: EHCI Host Controller
[    0.207692] ehci-pci 0000:00:1a.0: new USB bus registered, assigned bus number 1
[    0.208438] ehci-pci 0000:00:1a.0: debug port 2
[    0.212702] ehci-pci 0000:00:1a.0: cache line size of 64 is not supported
[    0.212716] ehci-pci 0000:00:1a.0: irq 16, io mem 0xf162a000
[    0.218593] ehci-pci 0000:00:1a.0: USB 2.0 started, EHCI 1.00
[    0.218973] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[    0.219331] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    0.220071] usb usb1: Product: EHCI Host Controller
[    0.220465] usb usb1: Manufacturer: Linux 3.17.0-rc1+ ehci_hcd
[    0.220876] usb usb1: SerialNumber: 0000:00:1a.0
[    0.221405] hub 1-0:1.0: USB hub found
[    0.221820] hub 1-0:1.0: 3 ports detected
[    0.222382] ehci-pci 0000:00:1d.0: EHCI Host Controller
[    0.222819] ehci-pci 0000:00:1d.0: new USB bus registered, assigned bus number 2
[    0.223566] ehci-pci 0000:00:1d.0: debug port 2
[    0.227864] ehci-pci 0000:00:1d.0: cache line size of 64 is not supported
[    0.227876] ehci-pci 0000:00:1d.0: irq 23, io mem 0xf1629000
[    0.233588] ehci-pci 0000:00:1d.0: USB 2.0 started, EHCI 1.00
[    0.233985] usb usb2: New USB device found, idVendor=1d6b, idProduct=0002
[    0.234371] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    0.235136] usb usb2: Product: EHCI Host Controller
[    0.235520] usb usb2: Manufacturer: Linux 3.17.0-rc1+ ehci_hcd
[    0.235912] usb usb2: SerialNumber: 0000:00:1d.0
[    0.236397] hub 2-0:1.0: USB hub found
[    0.236779] hub 2-0:1.0: 3 ports detected
[    0.237243] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    0.237633] ohci-pci: OHCI PCI platform driver
[    0.238020] uhci_hcd: USB Universal Host Controller Interface driver
[    0.238468] xhci_hcd 0000:0d:00.0: xHCI Host Controller
[    0.238908] xhci_hcd 0000:0d:00.0: new USB bus registered, assigned bus number 3
[    0.239842] xhci_hcd 0000:0d:00.0: irq 27 for MSI/MSI-X
[    0.239850] xhci_hcd 0000:0d:00.0: irq 28 for MSI/MSI-X
[    0.239854] xhci_hcd 0000:0d:00.0: irq 29 for MSI/MSI-X
[    0.239857] xhci_hcd 0000:0d:00.0: irq 30 for MSI/MSI-X
[    0.239860] xhci_hcd 0000:0d:00.0: irq 31 for MSI/MSI-X
[    0.239984] usb usb3: New USB device found, idVendor=1d6b, idProduct=0002
[    0.240381] usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    0.241172] usb usb3: Product: xHCI Host Controller
[    0.241587] usb usb3: Manufacturer: Linux 3.17.0-rc1+ xhci_hcd
[    0.241999] usb usb3: SerialNumber: 0000:0d:00.0
[    0.242506] hub 3-0:1.0: USB hub found
[    0.242916] hub 3-0:1.0: 2 ports detected
[    0.243379] xhci_hcd 0000:0d:00.0: xHCI Host Controller
[    0.243822] xhci_hcd 0000:0d:00.0: new USB bus registered, assigned bus number 4
[    0.244653] usb usb4: New USB device found, idVendor=1d6b, idProduct=0003
[    0.245067] usb usb4: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    0.245868] usb usb4: Product: xHCI Host Controller
[    0.246276] usb usb4: Manufacturer: Linux 3.17.0-rc1+ xhci_hcd
[    0.246695] usb usb4: SerialNumber: 0000:0d:00.0
[    0.247199] hub 4-0:1.0: USB hub found
[    0.247629] hub 4-0:1.0: 2 ports detected
[    0.248147] usbcore: registered new interface driver usbserial
[    0.248562] usbcore: registered new interface driver usbserial_generic
[    0.248972] usbserial: USB Serial support registered for generic
[    0.249392] i8042: PNP: PS/2 Controller [PNP0303:KBD,PNP0f13:MOU] at 0x60,0x64 irq 1,12
[    0.253533] serio: i8042 KBD port at 0x60,0x64 irq 1
[    0.253937] serio: i8042 AUX port at 0x60,0x64 irq 12
[    0.254426] mousedev: PS/2 mouse device common for all mice
[    0.255049] rtc_cmos 00:02: RTC can wake from S4
[    0.255582] rtc_cmos 00:02: rtc core: registered rtc_cmos as rtc0
[    0.256000] rtc_cmos 00:02: alarms up to one month, y3k, 114 bytes nvram, hpet irqs
[    0.256841] device-mapper: uevent: version 1.0.3
[    0.257325] device-mapper: ioctl: 4.27.0-ioctl (2013-10-30) initialised: dm-devel@redhat.com
[    0.258237] Intel P-state driver initializing.
[    0.258685] Intel pstate controlling: cpu 0
[    0.259125] Intel pstate controlling: cpu 1
[    0.259539] input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input3
[    0.260418] Intel pstate controlling: cpu 2
[    0.261657] Intel pstate controlling: cpu 3
[    0.264035] EFI Variables Facility v0.08 2004-May-17
[    0.286575] hidraw: raw HID events driver (C) Jiri Kosina
[    0.286994] usbcore: registered new interface driver usbhid
[    0.287320] usbhid: USB HID core driver
[    0.287681] drop_monitor: Initializing network drop monitor service
[    0.288078] ip_tables: (C) 2000-2006 Netfilter Core Team
[    0.288449] TCP: cubic registered
[    0.288778] Initializing XFRM netlink socket
[    0.289170] NET: Registered protocol family 10
[    0.289696] mip6: Mobile IPv6
[    0.290004] NET: Registered protocol family 17
[    0.290876] Loading compiled-in X.509 certificates
[    0.291968] Loaded X.509 cert 'Magrathea: Glacier signing key: 0e98bcbef2d487a15bbb50ab56a3f100c59c5e4d'
[    0.292624] registered taskstats version 1
[    0.293802]   Magic number: 10:19:25
[    0.295154] rtc_cmos 00:02: setting system clock to 2014-08-25 11:02:38 UTC (1408964558)
[    0.297806] PM: Hibernation image not present or could not be loaded.
[    0.510613] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[    0.512311] ata1.00: ACPI cmd ef/02:00:00:00:00:a0 (SET FEATURES) succeeded
[    0.512320] ata1.00: ACPI cmd f5/00:00:00:00:00:a0 (SECURITY FREEZE LOCK) filtered out
[    0.514613] ata1.00: ACPI cmd ef/10:03:00:00:00:a0 (SET FEATURES) filtered out
[    0.517080] ata1.00: ATA-8: INTEL SSDSA2BW160G3L, 4PC1LE04, max UDMA/133
[    0.518213] ata1.00: 312581808 sectors, multi 1: LBA48 NCQ (depth 31/32)
[    0.519931] ata1.00: ACPI cmd ef/02:00:00:00:00:a0 (SET FEATURES) succeeded
[    0.519939] ata1.00: ACPI cmd f5/00:00:00:00:00:a0 (SECURITY FREEZE LOCK) filtered out
[    0.522174] ata1.00: ACPI cmd ef/10:03:00:00:00:a0 (SET FEATURES) filtered out
[    0.524632] usb 1-1: new high-speed USB device number 2 using ehci-pci
[    0.526072] ata1.00: configured for UDMA/133
[    0.527610] scsi 0:0:0:0: Direct-Access     ATA      INTEL SSDSA2BW16 LE04 PQ: 0 ANSI: 5
[    0.531115] sd 0:0:0:0: [sda] 312581808 512-byte logical blocks: (160 GB/149 GiB)
[    0.531231] sd 0:0:0:0: Attached scsi generic sg0 type 0
[    0.536289] sd 0:0:0:0: [sda] Write Protect is off
[    0.537902] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
[    0.537946] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[    0.545393]  sda: sda1 sda2 sda3 sda4 sda5
[    0.547398] sd 0:0:0:0: [sda] Attached SCSI disk


^ permalink raw reply	[flat|nested] 7+ messages in thread

* [PATCH V2] efi_high_alloc: use EFI_ALLOCATE_MAX_ADDRESS
  2014-08-22 13:48 [PATCH] efi_high_alloc: use EFI_ALLOCATE_MAX_ADDRESS harald
  2014-08-25 10:34 ` Matt Fleming
@ 2014-08-25 11:55 ` harald
  2014-08-25 13:07   ` Matt Fleming
  1 sibling, 1 reply; 7+ messages in thread
From: harald @ 2014-08-25 11:55 UTC (permalink / raw)
  To: linux-kernel; +Cc: linux-efi, Harald Hoyer

From: Harald Hoyer <harald@redhat.com>

On my Lenovo T420s with 4GB memory, efi_high_alloc() was checking the
following memory regions:

0x0000000000100000 - 0x0000000020000000
0x0000000020200000 - 0x0000000040000000
0x0000000040200000 - 0x00000000d2c02000
0x00000000d6e9f000 - 0x000000011e600000

and decided to allocate 2649 pages at address 0x11dba7000.
...
[    0.000000] efi: mem53: type=2, attr=0xf, range=[0x000000011dba7000-0x000000011e600000) (10MB)
...
[    0.000000] RAMDISK: [mem 0x11dba7000-0x11e5fffff]
...
[    0.154933] Unpacking initramfs...
[    0.160990] Initramfs unpacking failed: junk in compressed archive
[    0.163436] Freeing initrd memory: 10596K (ffff88011dba7000 - ffff88011e600000)
...

Nevertheless, unpacking of the initramfs later on failed.
This is maybe caused by my buggy EFI BIOS and
commit 4bf7111f50167133a71c23530ca852a41355e739,
which enables loading the initramfs above 4G addresses.

With this patch efi_high_alloc() now uses EFI_ALLOCATE_MAX_ADDRESS,
which should do the same as before, but use the EFI logic to select the high memory range.

This returns 0x00000000d2c02000 on my machine and the initramfs is
loaded, uncompressed and executed correctly.

...
[    0.000000] efi: mem15: type=2, attr=0xf, range=[0x00000000d2c02000-0x00000000d365b000) (10MB)
...
[    0.000000] RAMDISK: [mem 0xd2c02000-0xd365afff]
...
[    0.151269] Unpacking initramfs...
[    0.309868] Freeing initrd memory: 10596K (ffff8800d2c02000 - ffff8800d365b000)
...


Signed-off-by: Harald Hoyer <harald@redhat.com>
---

V2: return value of EFI_ALLOCATE_MAX_ADDRESS is the begin of the segment, and not the end

 drivers/firmware/efi/libstub/efi-stub-helper.c | 74 +++++---------------------
 1 file changed, 14 insertions(+), 60 deletions(-)

diff --git a/drivers/firmware/efi/libstub/efi-stub-helper.c b/drivers/firmware/efi/libstub/efi-stub-helper.c
index 32d5cca..9aafcf8 100644
--- a/drivers/firmware/efi/libstub/efi-stub-helper.c
+++ b/drivers/firmware/efi/libstub/efi-stub-helper.c
@@ -118,82 +118,36 @@ efi_status_t efi_high_alloc(efi_system_table_t *sys_table_arg,
 			    unsigned long size, unsigned long align,
 			    unsigned long *addr, unsigned long max)
 {
-	unsigned long map_size, desc_size;
-	efi_memory_desc_t *map;
 	efi_status_t status;
 	unsigned long nr_pages;
 	u64 max_addr = 0;
-	int i;
-
-	status = efi_get_memory_map(sys_table_arg, &map, &map_size, &desc_size,
-				    NULL, NULL);
-	if (status != EFI_SUCCESS)
-		goto fail;
 
 	/*
 	 * Enforce minimum alignment that EFI requires when requesting
-	 * a specific address.  We are doing page-based allocations,
+	 * a specific address.	We are doing page-based allocations,
 	 * so we must be aligned to a page.
 	 */
 	if (align < EFI_PAGE_SIZE)
 		align = EFI_PAGE_SIZE;
 
-	nr_pages = round_up(size, EFI_PAGE_SIZE) / EFI_PAGE_SIZE;
-again:
-	for (i = 0; i < map_size / desc_size; i++) {
-		efi_memory_desc_t *desc;
-		unsigned long m = (unsigned long)map;
-		u64 start, end;
-
-		desc = (efi_memory_desc_t *)(m + (i * desc_size));
-		if (desc->type != EFI_CONVENTIONAL_MEMORY)
-			continue;
-
-		if (desc->num_pages < nr_pages)
-			continue;
-
-		start = desc->phys_addr;
-		end = start + desc->num_pages * (1UL << EFI_PAGE_SHIFT);
-
-		if ((start + size) > end || (start + size) > max)
-			continue;
-
-		if (end - size > max)
-			end = max;
-
-		if (round_down(end - size, align) < start)
-			continue;
-
-		start = round_down(end - size, align);
-
-		/*
-		 * Don't allocate at 0x0. It will confuse code that
-		 * checks pointers against NULL.
-		 */
-		if (start == 0x0)
-			continue;
+	nr_pages = round_up(size, align) / EFI_PAGE_SIZE;
+	max_addr = round_down(round_down((max_addr-size), align) + size, EFI_PAGE_SIZE);
 
-		if (start > max_addr)
-			max_addr = start;
-	}
+	/*
+	 * In case align > EFI_PAGE_SIZE, we need a little more space,
+	 * to round_up() later
+	 */
+	if (align > EFI_PAGE_SIZE)
+		nr_pages += round_up(align, EFI_PAGE_SIZE) / EFI_PAGE_SIZE;
 
-	if (!max_addr)
-		status = EFI_NOT_FOUND;
-	else {
-		status = efi_call_early(allocate_pages,
-					EFI_ALLOCATE_ADDRESS, EFI_LOADER_DATA,
-					nr_pages, &max_addr);
-		if (status != EFI_SUCCESS) {
-			max = max_addr;
-			max_addr = 0;
-			goto again;
-		}
+	status = efi_call_early(allocate_pages,
+				EFI_ALLOCATE_MAX_ADDRESS, EFI_LOADER_DATA,
+				nr_pages, &max_addr);
 
-		*addr = max_addr;
+	if (status == EFI_SUCCESS) {
+		*addr = round_up(max_addr, align);
 	}
 
-	efi_call_early(free_pool, map);
-fail:
 	return status;
 }
 
-- 
2.1.0


^ permalink raw reply related	[flat|nested] 7+ messages in thread

* Re: [PATCH V2] efi_high_alloc: use EFI_ALLOCATE_MAX_ADDRESS
  2014-08-25 11:55 ` [PATCH V2] " harald
@ 2014-08-25 13:07   ` Matt Fleming
  2014-08-25 14:33     ` Harald Hoyer
  0 siblings, 1 reply; 7+ messages in thread
From: Matt Fleming @ 2014-08-25 13:07 UTC (permalink / raw)
  To: harald; +Cc: linux-kernel, linux-efi

On Mon, 25 Aug, at 01:55:32PM, harald@redhat.com wrote:
> From: Harald Hoyer <harald@redhat.com>
> 
> On my Lenovo T420s with 4GB memory, efi_high_alloc() was checking the
> following memory regions:
> 
> 0x0000000000100000 - 0x0000000020000000
> 0x0000000020200000 - 0x0000000040000000
> 0x0000000040200000 - 0x00000000d2c02000
> 0x00000000d6e9f000 - 0x000000011e600000
> 
> and decided to allocate 2649 pages at address 0x11dba7000.
> ...
> [    0.000000] efi: mem53: type=2, attr=0xf, range=[0x000000011dba7000-0x000000011e600000) (10MB)
> ...
> [    0.000000] RAMDISK: [mem 0x11dba7000-0x11e5fffff]
> ...
> [    0.154933] Unpacking initramfs...
> [    0.160990] Initramfs unpacking failed: junk in compressed archive
> [    0.163436] Freeing initrd memory: 10596K (ffff88011dba7000 - ffff88011e600000)
> ...
> 
> Nevertheless, unpacking of the initramfs later on failed.
> This is maybe caused by my buggy EFI BIOS and
> commit 4bf7111f50167133a71c23530ca852a41355e739,
> which enables loading the initramfs above 4G addresses.
> 
> With this patch efi_high_alloc() now uses EFI_ALLOCATE_MAX_ADDRESS,
> which should do the same as before, but use the EFI logic to select the high memory range.
 
No, that's not correct. Your patch changes the semantics of
efi_high_alloc(). The original version allocates from the top of memory
down, so you always get the highest aligned address, that is no higher
than 'max_addr'.

Your version allocates some address that isn't above 'max_addr', but it
needn't necessarily be the highest possible address. The following is
taken from the AllocatePages() documentation in the UEFI spec,

  "Allocation requests of Type AllocateMaxAddress allocate any available
   range of pages whose uppermost address is less than or equal to the
   address pointed to by Memory on input."

Note the part about allocating *any* available range.

Furthermore, there are more callers of efi_high_alloc() than the initrd
loading case, and you've changed their behaviour with this patch.

I get where you're coming from, but this isn't the best way to solve
this problem, sorry. NAK.

-- 
Matt Fleming, Intel Open Source Technology Center

^ permalink raw reply	[flat|nested] 7+ messages in thread

* Re: [PATCH V2] efi_high_alloc: use EFI_ALLOCATE_MAX_ADDRESS
  2014-08-25 13:07   ` Matt Fleming
@ 2014-08-25 14:33     ` Harald Hoyer
  2014-08-27 10:30       ` Matt Fleming
  0 siblings, 1 reply; 7+ messages in thread
From: Harald Hoyer @ 2014-08-25 14:33 UTC (permalink / raw)
  To: Matt Fleming; +Cc: linux-kernel, linux-efi

On 25.08.2014 15:07, Matt Fleming wrote:
> On Mon, 25 Aug, at 01:55:32PM, harald@redhat.com wrote:
>> From: Harald Hoyer <harald@redhat.com>
>>
>> On my Lenovo T420s with 4GB memory, efi_high_alloc() was checking the
>> following memory regions:
>>
>> 0x0000000000100000 - 0x0000000020000000
>> 0x0000000020200000 - 0x0000000040000000
>> 0x0000000040200000 - 0x00000000d2c02000
>> 0x00000000d6e9f000 - 0x000000011e600000
>>
>> and decided to allocate 2649 pages at address 0x11dba7000.
>> ...
>> [    0.000000] efi: mem53: type=2, attr=0xf, range=[0x000000011dba7000-0x000000011e600000) (10MB)
>> ...
>> [    0.000000] RAMDISK: [mem 0x11dba7000-0x11e5fffff]
>> ...
>> [    0.154933] Unpacking initramfs...
>> [    0.160990] Initramfs unpacking failed: junk in compressed archive
>> [    0.163436] Freeing initrd memory: 10596K (ffff88011dba7000 - ffff88011e600000)
>> ...
>>
>> Nevertheless, unpacking of the initramfs later on failed.
>> This is maybe caused by my buggy EFI BIOS and
>> commit 4bf7111f50167133a71c23530ca852a41355e739,
>> which enables loading the initramfs above 4G addresses.
>>
>> With this patch efi_high_alloc() now uses EFI_ALLOCATE_MAX_ADDRESS,
>> which should do the same as before, but use the EFI logic to select the high memory range.
>  
> No, that's not correct. Your patch changes the semantics of
> efi_high_alloc(). The original version allocates from the top of memory
> down, so you always get the highest aligned address, that is no higher
> than 'max_addr'.
> 
> Your version allocates some address that isn't above 'max_addr', but it
> needn't necessarily be the highest possible address. The following is
> taken from the AllocatePages() documentation in the UEFI spec,
> 
>   "Allocation requests of Type AllocateMaxAddress allocate any available
>    range of pages whose uppermost address is less than or equal to the
>    address pointed to by Memory on input."
> 
> Note the part about allocating *any* available range.
> 
> Furthermore, there are more callers of efi_high_alloc() than the initrd
> loading case, and you've changed their behaviour with this patch.
> 
> I get where you're coming from, but this isn't the best way to solve
> this problem, sorry. NAK.
> 

So is that ok, if other callers of efi_high_alloc() get an address > 4GB?

Will the buggy EFI implementation work with the usage of the other caller's
allocated memory? Or will they run into the same issues as the initramfs loader?

^ permalink raw reply	[flat|nested] 7+ messages in thread

* Re: [PATCH V2] efi_high_alloc: use EFI_ALLOCATE_MAX_ADDRESS
  2014-08-25 14:33     ` Harald Hoyer
@ 2014-08-27 10:30       ` Matt Fleming
  0 siblings, 0 replies; 7+ messages in thread
From: Matt Fleming @ 2014-08-27 10:30 UTC (permalink / raw)
  To: Harald Hoyer; +Cc: linux-kernel, linux-efi

On Mon, 25 Aug, at 04:33:54PM, Harald Hoyer wrote:
> 
> So is that ok, if other callers of efi_high_alloc() get an address >
> 4GB?

Yeah, the issue at hand is that some x86 EFI firmware cannot perform a
file read into a buffer above 4G. The actual allocation works fine.

If other callers want a high address buffer, they're not going to hit
that issue. We've no reason to believe that this bug affects arm64 at
all, for instance.

Working around this problem in efi_high_alloc() gives the impression
that there's something wrong with AllocatePages(), which isn't the case.

> Will the buggy EFI implementation work with the usage of the other
> caller's allocated memory? Or will they run into the same issues as
> the initramfs loader?

Based on the information we've gathered so far, there's no reason to
believe other callers will hit the same issue as the file reading code.

-- 
Matt Fleming, Intel Open Source Technology Center

^ permalink raw reply	[flat|nested] 7+ messages in thread

end of thread, other threads:[~2014-08-27 10:30 UTC | newest]

Thread overview: 7+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2014-08-22 13:48 [PATCH] efi_high_alloc: use EFI_ALLOCATE_MAX_ADDRESS harald
2014-08-25 10:34 ` Matt Fleming
2014-08-25 11:10   ` Harald Hoyer
2014-08-25 11:55 ` [PATCH V2] " harald
2014-08-25 13:07   ` Matt Fleming
2014-08-25 14:33     ` Harald Hoyer
2014-08-27 10:30       ` Matt Fleming

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