| Commit message (Collapse) | Author | Age | Files | Lines |
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Support for graceful handling of kernel reboots after an Intel(R) TXT launch.
Without this patch, attempting to reboot or halt the system will cause the
TXT hardware to lock memory upon system restart because the secrets-in-memory
flag that was set on launch was never cleared. This will in turn cause BIOS
to execute a TXT Authenticated Code Module (ACM) that will scrub all of memory
and then unlock it. Depending on the amount of memory in the system and its type,
this may take some time.
This patch creates a 1:1 address mapping to the tboot module and then calls back
into tboot so that it may properly and securely clean up system state and clear
the secrets-in-memory flag. When it has completed these steps, the tboot module
will reboot or halt the system.
arch/x86/kernel/reboot.c | 8 ++++++++
init/main.c | 3 +++
2 files changed, 11 insertions(+)
Signed-off-by: Joseph Cihula <joseph.cihula@intel.com>
Signed-off-by: Shane Wang <shane.wang@intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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This patch adds kernel configuration and boot support for Intel Trusted
Execution Technology (Intel TXT).
Intel's technology for safer computing, Intel Trusted Execution
Technology (Intel TXT), defines platform-level enhancements that
provide the building blocks for creating trusted platforms.
Intel TXT was formerly known by the code name LaGrande Technology (LT).
Intel TXT in Brief:
o Provides dynamic root of trust for measurement (DRTM)
o Data protection in case of improper shutdown
o Measurement and verification of launched environment
Intel TXT is part of the vPro(TM) brand and is also available some
non-vPro systems. It is currently available on desktop systems based on
the Q35, X38, Q45, and Q43 Express chipsets (e.g. Dell Optiplex 755, HP
dc7800, etc.) and mobile systems based on the GM45, PM45, and GS45
Express chipsets.
For more information, see http://www.intel.com/technology/security/.
This site also has a link to the Intel TXT MLE Developers Manual, which
has been updated for the new released platforms.
A much more complete description of how these patches support TXT, how to
configure a system for it, etc. is in the Documentation/intel_txt.txt file
in this patch.
This patch provides the TXT support routines for complete functionality,
documentation for TXT support and for the changes to the boot_params structure,
and boot detection of a TXT launch. Attempts to shutdown (reboot, Sx) the system
will result in platform resets; subsequent patches will support these shutdown modes
properly.
Documentation/intel_txt.txt | 210 +++++++++++++++++++++
Documentation/x86/zero-page.txt | 1
arch/x86/include/asm/bootparam.h | 3
arch/x86/include/asm/fixmap.h | 3
arch/x86/include/asm/tboot.h | 197 ++++++++++++++++++++
arch/x86/kernel/Makefile | 1
arch/x86/kernel/setup.c | 4
arch/x86/kernel/tboot.c | 379 +++++++++++++++++++++++++++++++++++++++
security/Kconfig | 30 +++
9 files changed, 827 insertions(+), 1 deletion(-)
Signed-off-by: Joseph Cihula <joseph.cihula@intel.com>
Signed-off-by: Shane Wang <shane.wang@intel.com>
Signed-off-by: Gang Wei <gang.wei@intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-fixes:
vmlinux.lds.h: restructure BSS linker script macros
kconfig: initialize the screen before using curses(3) functions
kconfig: variable argument lists needs `stdarg.h'
kbuild, deb-pkg: fix install scripts for posix sh
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The BSS section macros in vmlinux.lds.h currently place the .sbss
input section outside the bounds of [__bss_start, __bss_end]. On all
architectures except for microblaze that handle both .sbss and
__bss_start/__bss_end, this is wrong: the .sbss input section is
within the range [__bss_start, __bss_end]. Relatedly, the example
code at the top of the file actually has __bss_start/__bss_end defined
twice; I believe the right fix here is to define them in the
BSS_SECTION macro but not in the BSS macro.
Another problem with the current macros is that several
architectures have an ALIGN(4) or some other small number just before
__bss_stop in their linker scripts. The BSS_SECTION macro currently
hardcodes this to 4; while it should really be an argument. It also
ignores its sbss_align argument; fix that.
mn10300 is the only user at present of any of the macros touched by
this patch. It looks like mn10300 actually was incorrectly converted
to use the new BSS() macro (the alignment of 4 prior to conversion was
a __bss_stop alignment, but the argument to the BSS macro is a start
alignment). So fix this as well.
I'd like acks from Sam and David on this one. Also CCing Paul, since
he has a patch from me which will need to be updated to use
BSS_SECTION(0, PAGE_SIZE, 4) once this gets merged.
Signed-off-by: Tim Abbott <tabbott@ksplice.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
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This is needed on non ncurses based implementation to get a properly
initialized `stdscr' in main().
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
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Fix build on non GNU based platforms.
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
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bash versus dash and posh disagree on expanding $@ within double quotes:
export x="$@"
see http://bugs.debian.org/381091 for details
just use the arglist with $*.
dpkg: error processing linux-image-2.6.31-rc1_2.6.31-rc1-18_i386.deb (--install):
subprocess pre-installation script returned error exit status 2
export: 6: 2.6.31-rc1-18: bad variable name
fixes http://bugzilla.kernel.org/show_bug.cgi?id=13567
seen on Ubuntu as there dash is the default sh,
versus bash on Debian.
Reported-by: Pauli <suokkos@gmail.com>
Cc: Frans Pop <elendil@planet.nl>
Signed-off-by: maximilian attems <max@stro.at>
Acked-By: Andres Salomon <dilinger@collabora.co.uk>
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git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
9p: Fix incorrect parameters to v9fs_file_readn.
9p: Possible regression in p9_client_stat
9p: default 9p transport module fix
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Fix v9fs_vfs_readpage. The offset and size parameters to v9fs_file_readn
were interchanged and hence passed incorrectly.
Signed-off-by: Abhishek Kulkarni <adkulkar@umail.iu.edu>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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Fix a possible regression with p9_client_stat where it can try to kfree
an ERR_PTR after an erroneous p9pdu_readf. Also remove an unnecessary data
buffer increment in p9_client_read.
Signed-off-by: Abhishek Kulkarni <adkulkar@umail.iu.edu>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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The default 9p transport module is not chosen unless an option parameter (any)
is passed to mount, which thus returns a ENOPROTOSUPPORT. This fix moves the
check out of parse_opts into p9_client_create.
Signed-off-by: Abhishek Kulkarni <adkulkar@umail.iu.edu>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6:
cifs: free nativeFileSystem field before allocating a new one
[CIFS] Distinguish posix opens and mkdirs from legacy mkdirs in stats
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...otherwise, we'll leak this memory if we have to reconnect (e.g. after
network failure).
Signed-off-by: Jeff Layton <jlayton@redhat.com>
CC: Stable <stable@kernel.org>
Signed-off-by: Steve French <sfrench@us.ibm.com>
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Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin: (21 commits)
Blackfin: define HARDIRQ_BITS again for now
arch/blackfin: Add kmalloc NULL tests
Blackfin: add CPLB entries for Core B on-chip L1 SRAM regions
Blackfin: work around anomaly 05000189
Blackfin: drop per-cpu loops_per_jiffy tracking
Blackfin: fix bugs in GPIO resume code
Blackfin: bf537-stamp: fix irq decl for AD7142
Blackfin: fix handling of IPEND in interrupt context save
Blackfin: drop duplicate runtime checking of anomaly 05000448
Blackfin: fix incomplete renaming of the bfin-twi-lcd driver
Blackfin: fix wrong CTS inversion
Blackfin: update handling of anomaly 364 (wrong rev id in BF527-0.1)
Blackfin: fix early_dma_memcpy() handling of busy channels
Blackfin: handle BF561 Core B memory regions better when SMP=n
Blackfin: fix miscompilation in lshrdi3
Blackfin: fix silent crash when no uClinux MTD filesystem exists
Blackfin: restore exception banner when dumping crash info
Blackfin: work around anomaly 05000281
Blackfin: update anomaly lists to match latest sheets/usage
Blackfin: drop dead flash_probe call
...
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The default values of HARDIRQ_BITS and PREEMPT_BITS in common code leads to
build failure:
In file included from include/linux/interrupt.h:12,
from include/linux/kernel_stat.h:8,
from arch/blackfin/kernel/asm-offsets.c:32:
include/linux/hardirq.h:66:2: error: #error PREEMPT_ACTIVE is too low!
So until that gets resolved, just declare our own default value again.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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Check that the result of kmalloc is not NULL before passing it to other
functions.
In the first two cases, the new code returns -ENOMEM, which seems
compatible with what is done for similar functions for other architectures.
In the last two cases, the new code fails silently, ie just returns,
because the function has void return type.
The semantic match that finds this problem is as follows:
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@@
expression *x;
identifier f;
constant char *C;
@@
x = \(kmalloc\|kcalloc\|kzalloc\)(...);
... when != x == NULL
when != x != NULL
when != (x || ...)
(
kfree(x)
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f(...,C,...,x,...)
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*f(...,x,...)
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*x->f
)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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The Blackfin SMP port was missing CPLB entries for Core B on-chip L1 SRAM
regions. Any code that attempted to use these would wrongly crash due to
a CPLB miss.
Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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Similar to anomaly 05000281 but not as bad, we cannot return to the
instruction causing a fault otherwise we'll trigger a second false
exception. The system can still recover, but it isn't correct.
Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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On Blackfin SMP, a per-cpu loops_per_jiffy is pointless since both cores
always run at the same CCLK. In addition, the current implementation has
flaws since the main consumer for loops_per_jiffy (asm/delay.h) uses the
global kernel loops_per_jiffy and not the per_cpu one. So punt all of the
per-cpu handling and go back to the global shared one.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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Change the bfin_gpio_pm_hibernate_restore() function to:
1) AND restored DATA with DIR (not OR) to get correct final state
2) Restore DATA before setting DIR to avoid glitches
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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The AD7142 add-on card hooks the IRQ line up to PG5, not PF5.
Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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The interrupt context save logic incorrectly stored the address of the
IPEND register rather than its value due to a missing dereference. While
we're here, also enable this code for all kernel debugging scenarios and
not just when KGDB is enabled.
Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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We already catch this anomaly at compile time, and the runtime version is
such that it ends up checking on all parts rather than just the ones that
might actually have it.
Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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The sed used to rename the bfin-twi-lcd only replaced the first instance
rather than all which led to the resources not being enabled when the
driver was built as a module.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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The Blackfin serial headers were inverting the CTS value leading to wrong
handling of the CTS line which broke CTS/RTS handling completely.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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This anomaly only applies to the BF527-0.1, not the BF526-0.1, and not any
other revision of the BF527. So make sure we don't go returning 0xffff
for other cases.
Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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The early logic to locate a free DMA channel and then set it up was broken
in a few ways that only manifested itself when we needed to set up more
than 2 on chip SRAM regions (most board defaults setup 1 or 2). First, we
checked the wrong status register (the destination gets updated, not the
source) and second, we did the ssync before rather than after resetting a
DMA config register.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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Rather than assume Core B is always run with caches turned on, let people
load into any of the on-chip memory regions. It is their business how the
SRAM/Cache regions are utilized, so don't prevent them from being able to
load into them.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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The code used in the Blackfin lshrdi3 utilizes gcc constructs. However,
the structures declared don't line up with the code gcc generates, so
under certain optimizations, we get bad code and things crap out in fun
random ways. So rather than trying to maintain different gcc definitions
ourselves, just use the ones available in gcclib.h.
URL: http://blackfin.uclinux.org/gf/tracker/5286
Signed-off-by: Jie Zhang <jie.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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Since we need to relocate the attached filesystem with the uClinux MTD map
(to handle some anomalies), we need to know its real filesize. If we boot
a kernel without a filesystem actually attached, we end up blindly reading
and copying garbage (since there is no magic value to detect validity).
Often times this results in an early crash and no output. So add a few
basic sanity checks before operating on things to catch the majority of
cases.
Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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Previous unification code put the exception banner behind the "is oops"
logic when it should have been printed all the time.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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Add missing anomaly workaround for anomaly 05000281 - we can't return to
instructions which cause hardware errors otherwise we trigger the error
again which means we go into an infinite loop of handling, returning, and
retriggering. This work around confuses gdb when the error occurs as the
PC will seemed to have moved, so a better long term fix will need to be
figured out, but for now this is better than an infinite crash loop.
Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Cliff Cai <cliff.cai@analog.com>
Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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There are no CONFIG_{BLK,CHR}_DEV_FLASH Kconfig options, and there is no
flash_probe() function, so not really sure what this code is all about.
Seems to be dead code that stretches way back to the start of the Blackfin
port.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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Improve the assembly with a few explanatory comments and use symbolic
defines rather than numeric values for bit positions.
Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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Standard data flow for MMC/SD/SDIO cards requires that the mvsdio
controller be set for big endian operation. This is causing problems
with buffers which length is not a multiple of 4 bytes as the last
partial word doesn't get shifted all the way and stored properly in
memory. Let's compensate for this.
Signed-off-by: Nicolas Pitre <nico@marvell.com>
CC: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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The Blackfin serial headers were inverting the CTS value leading to wrong
handling of the CTS line which broke CTS/RTS handling completely.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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This function does not have an error return and returning an error is
instead interpreted as having a lot of pending bytes.
Reported by Jeff Harris who provided a list of some of the remaining
offenders.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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If spin_lock_irqsave is called twice in a row with the same second
argument, the interrupt state at the point of the second call overwrites
the value saved by the first call. Indeed, the second call does not
need to save the interrupt state, so it is changed to a simple
spin_lock.
The semantic match that finds this problem is as follows:
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@@
expression lock1,lock2;
expression flags;
@@
*spin_lock_irqsave(lock1,flags)
... when != flags
*spin_lock_irqsave(lock2,flags)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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The buffer for the consoles are unconditionally allocated at con_init()
time, which miss the creation of the vcs(a) devices.
Since 2.6.30 (commit 4995f8ef9d3aac72745e12419d7fbaa8d01b1d81, 'vcs:
hook sysfs devices into object lifetime instead of "binding"' to be
exact) these devices are no longer created at open() and removed on
close(), but controlled by the lifetime of the buffers.
Reported-by: Gerardo Exequiel Pozzi <vmlinuz386@yahoo.com.ar>
Tested-by: Gerardo Exequiel Pozzi <vmlinuz386@yahoo.com.ar>
Cc: stable@kernel.org
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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* master.kernel.org:/home/rmk/linux-2.6-arm:
ARM: Realview & Versatile: Fix i2c_board_info definitions
[ARM] 5608/1: Updated U300 defconfig
[ARM] 5606/1: Fix ep93xx watchdog driver headers
[ARM] 5594/1: Correct U300 VIC init PM setting
[ARM] 5595/1: ep93xx: missing header in dma-m2p.c
[ARM] Kirkwood: Correct header define
[ARM] pxa: fix ULPI_{DIR,NXT,STP} MFP defines
backlight: fix pwm_bl.c to notify platform code when suspending
[ARM] pxa: use kzalloc() in pxa_init_gpio_chip()
[ARM] pxa: correct I2CPWR clock for pxa3xx
pxamci: correct DMA flow control
ARM: add support for the EET board, based on the i.MX31 pcm037 module
pcm037: add MT9T031 camera support
Armadillo 500 add NAND flash device support (resend).
ARM MXC: Armadillo 500 add NOR flash device support (resend).
mx31: remove duplicated #include
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Fix i2c_board_info definitions - we were defining the 'type' field
of these structures twice since the first argument of I2C_BOARD_INFO
sets this field. Move the second definition into I2C_BOARD_INFO().
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Ben Dooks <ben-linux@fluff.org>
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Removed the LBD support that isn't of any use right now at least,
then remove remnants of the TCM config flags that somehow crept
in by mistake (not yet merged patch for 2.6.32) and then the usual
defconfig noise from updated menus.
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Fix a number of build errors in the ep93xx watchdog driver due
to missing io.h
Signed-off-by: Ryan Mallon <ryan@bluewatersys.com>
Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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This makes the VIC resume from suspend flagged IRQ:s identical to
the flags indicating all possible interrupts. This is perhaps not
the optimal setting but setting it to 0 makes the system suspend
and never come back again (all IRQ sources masked off).
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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<linux/io.h> was getting included by <mach/ts72xx.h>, is should be
included by this file.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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