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* Blackfin: debug-mmrs: prevent macro arg from expandingMike Frysinger2011-07-23
| | | | | | | Passing a non-simple expression in as the addr arg could incorrectly apply the pointer cast resulting in misbehavior. Add proper paren. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: gptimers: add group structure for hardware register layoutMike Frysinger2011-07-23
| | | | Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: exec: remove redundant set_fs(USER_DS)Mathias Krause2011-07-23
| | | | | | | | The address limit is already set in flush_old_exec() so this set_fs(USER_DS) is redundant. Signed-off-by: Mathias Krause <minipli@googlemail.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: update anomaly lists to latest public infoMike Frysinger2011-07-23
| | | | Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: bf561-ezkit: change parallel flash from M to Y in defconfigMike Frysinger2011-07-23
| | | | | | | These flashes are always on the board, so might as well enable them by default rather than a module. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: debug-mmrs: disable PERIPHERAL_MAP for IMDMA channelsMike Frysinger2011-07-23
| | | | | | | | The documentation for the IMDMA channels appears to be incorrect. These DMA blocks don't actually have PERIPHERAL_MAP MMRs for us to access. Attempts to do so lead to system mmr hardware errors. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: debug-mmrs: fix typo in single dmac setupMike Frysinger2011-07-23
| | | | Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: convert to asm-generic/mutex-dec.h for all systemsMike Frysinger2011-07-23
| | | | | | | The Blackfin mutex.h is merely a copy of an older asm-generic/mutex-dec.h, so punt it and just use the common one directly. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: optimize double fault boot checkingMike Frysinger2011-07-23
| | | | | | | | This moves the double fault data used at boot time into a single struct which can then easily be addressed with indexed loads rather than having to explicitly load multiple addresses. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: time: replace magic numbers with definesMike Frysinger2011-07-23
| | | | Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: SMP: optimize start up code a bitMike Frysinger2011-07-23
| | | | | | | This just imports all of the optimization work done in the common startup code. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: boards: clean up redundant/dead spi resourcesMike Frysinger2011-07-23
| | | | | | | | | | | | The default for the Blackfin SPI driver is 8 bits and dma disabled, so many of the bfin5xx_spi_chip resources are redundant. So punt those parts. Further, drivers should themselves be declaring 16 bit transfers, so for those that do, and for the ones which no longer do 16 bit transfers, drop the bfin5xx_spi_chip resources. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: net2272: move pin setup to boards filesMike Frysinger2011-07-23
| | | | Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: convert to kbuild asm-generic supportMike Frysinger2011-07-23
| | | | | | No need for one line header stubs. Just declare it in Kbuild. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Merge branch 'x86-vdso-for-linus' of ↵Linus Torvalds2011-07-22
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86-64, vdso: Do not allocate memory for the vDSO clocksource: Change __ARCH_HAS_CLOCKSOURCE_DATA to a CONFIG option x86, vdso: Drop now wrong comment Document the vDSO and add a reference parser ia64: Replace clocksource.fsys_mmio with generic arch data x86-64: Move vread_tsc and vread_hpet into the vDSO clocksource: Replace vread with generic arch data x86-64: Add --no-undefined to vDSO build x86-64: Allow alternative patching in the vDSO x86: Make alternative instruction pointers relative x86-64: Improve vsyscall emulation CS and RIP handling x86-64: Emulate legacy vsyscalls x86-64: Fill unused parts of the vsyscall page with 0xcc x86-64: Remove vsyscall number 3 (venosys) x86-64: Map the HPET NX x86-64: Remove kernel.vsyscall64 sysctl x86-64: Give vvars their own page x86-64: Document some of entry_64.S x86-64: Fix alignment of jiffies variable
| * x86-64, vdso: Do not allocate memory for the vDSOAndy Lutomirski2011-07-21
| | | | | | | | | | | | | | | | | | | | We can map the vDSO straight from kernel data, saving a few page allocations. As an added bonus, the deleted code contained a memory leak. Signed-off-by: Andy Lutomirski <luto@mit.edu> Link: http://lkml.kernel.org/r/2c4ed5c2c2e93603790229e0c3403ae506ccc0cb.1311277573.git.luto@mit.edu Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| * clocksource: Change __ARCH_HAS_CLOCKSOURCE_DATA to a CONFIG optionH. Peter Anvin2011-07-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The machinery for __ARCH_HAS_CLOCKSOURCE_DATA assumed a file in asm-generic would be the default for architectures without their own file in asm/, but that is not how it works. Replace it with a Kconfig option instead. Link: http://lkml.kernel.org/r/4E288AA6.7090804@zytor.com Signed-off-by: H. Peter Anvin <hpa@zytor.com> Cc: Andy Lutomirski <luto@mit.edu> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Tony Luck <tony.luck@intel.com>
| * x86, vdso: Drop now wrong commentBorislav Petkov2011-07-18
| | | | | | | | | | | | | | | | | | | | Now that 1b3f2a72bbcfdf92e368a44448c45eb639b05b5e is in, it is very important that the below lying comment be removed! :-) Signed-off-by: Borislav Petkov <bp@alien8.de> Link: http://lkml.kernel.org/r/20110718191054.GA18359@liondog.tnic Acked-by: Andy Lutomirski <luto@mit.edu> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| * Document the vDSO and add a reference parserAndy Lutomirski2011-07-14
| | | | | | | | | | | | | | | | | | | | | | | | | | It turns out that parsing the vDSO is nontrivial if you don't already have an ELF dynamic loader around. So document it in Documentation/ABI and add a reference CC0-licenced parser. This code is dedicated to Go issue 1933: http://code.google.com/p/go/issues/detail?id=1933 Signed-off-by: Andy Lutomirski <luto@mit.edu> Link: http://lkml.kernel.org/r/a315a9514cd71bcf29436cc31e35aada21a5ff21.1310563276.git.luto@mit.edu Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| * ia64: Replace clocksource.fsys_mmio with generic arch dataAndy Lutomirski2011-07-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that clocksource.archdata is available, use it for ia64-specific code. Cc: Clemens Ladisch <clemens@ladisch.de> Cc: linux-ia64@vger.kernel.org Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: John Stultz <johnstul@us.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andy Lutomirski <luto@mit.edu> Link: http://lkml.kernel.org/r/d31de0ee0842a0e322fb6441571c2b0adb323fa2.1310563276.git.luto@mit.edu Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| * x86-64: Move vread_tsc and vread_hpet into the vDSOAndy Lutomirski2011-07-14
| | | | | | | | | | | | | | | | | | The vsyscall page now consists entirely of trap instructions. Cc: John Stultz <johnstul@us.ibm.com> Signed-off-by: Andy Lutomirski <luto@mit.edu> Link: http://lkml.kernel.org/r/637648f303f2ef93af93bae25186e9a1bea093f5.1310639973.git.luto@mit.edu Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| * clocksource: Replace vread with generic arch dataAndy Lutomirski2011-07-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The vread field was bloating struct clocksource everywhere except x86_64, and I want to change the way this works on x86_64, so let's split it out into per-arch data. Cc: x86@kernel.org Cc: Clemens Ladisch <clemens@ladisch.de> Cc: linux-ia64@vger.kernel.org Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: John Stultz <johnstul@us.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andy Lutomirski <luto@mit.edu> Link: http://lkml.kernel.org/r/3ae5ec76a168eaaae63f08a2a1060b91aa0b7759.1310563276.git.luto@mit.edu Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| * x86-64: Add --no-undefined to vDSO buildAndy Lutomirski2011-07-13
| | | | | | | | | | | | | | | | | | This gives much nicer diagnostics when something goes wrong. It's supported at least as far back as binutils 2.15. Signed-off-by: Andy Lutomirski <luto@mit.edu> Link: http://lkml.kernel.org/r/de0b50920469ff6359c529526e7639fdd36fa83c.1310563276.git.luto@mit.edu Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| * x86-64: Allow alternative patching in the vDSOAndy Lutomirski2011-07-13
| | | | | | | | | | | | | | | | | | This code is short enough and different enough from the module loader that it's not worth trying to share anything. Signed-off-by: Andy Lutomirski <luto@mit.edu> Link: http://lkml.kernel.org/r/e73112e4381fff29e31b882c2d0856822edaea53.1310563276.git.luto@mit.edu Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| * x86: Make alternative instruction pointers relativeAndy Lutomirski2011-07-13
| | | | | | | | | | | | | | | | | | This save a few bytes on x86-64 and means that future patches can apply alternatives to unrelocated code. Signed-off-by: Andy Lutomirski <luto@mit.edu> Link: http://lkml.kernel.org/r/ff64a6b9a1a3860ca4a7b8b6dc7b4754f9491cd7.1310563276.git.luto@mit.edu Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| * x86-64: Improve vsyscall emulation CS and RIP handlingAndy Lutomirski2011-07-13
| | | | | | | | | | | | | | | | | | | | | | | | | | Three fixes here: - Send SIGSEGV if called from compat code or with a funny CS. - Don't BUG on impossible addresses. - Add a missing local_irq_disable. This patch also removes an unused variable. Signed-off-by: Andy Lutomirski <luto@mit.edu> Link: http://lkml.kernel.org/r/6fb2b13ab39b743d1e4f466eef13425854912f7f.1310563276.git.luto@mit.edu Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| * x86-64: Emulate legacy vsyscallsAndy Lutomirski2011-06-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There's a fair amount of code in the vsyscall page. It contains a syscall instruction (in the gettimeofday fallback) and who knows what will happen if an exploit jumps into the middle of some other code. Reduce the risk by replacing the vsyscalls with short magic incantations that cause the kernel to emulate the real vsyscalls. These incantations are useless if entered in the middle. This causes vsyscalls to be a little more expensive than real syscalls. Fortunately sensible programs don't use them. The only exception is time() which is still called by glibc through the vsyscall - but calling time() millions of times per second is not sensible. glibc has this fixed in the development tree. This patch is not perfect: the vread_tsc and vread_hpet functions are still at a fixed address. Fixing that might involve making alternative patching work in the vDSO. Signed-off-by: Andy Lutomirski <luto@mit.edu> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Jesper Juhl <jj@chaosbits.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Arjan van de Ven <arjan@infradead.org> Cc: Jan Beulich <JBeulich@novell.com> Cc: richard -rw- weinberger <richard.weinberger@gmail.com> Cc: Mikael Pettersson <mikpe@it.uu.se> Cc: Andi Kleen <andi@firstfloor.org> Cc: Brian Gerst <brgerst@gmail.com> Cc: Louis Rilling <Louis.Rilling@kerlabs.com> Cc: Valdis.Kletnieks@vt.edu Cc: pageexec@freemail.hu Link: http://lkml.kernel.org/r/e64e1b3c64858820d12c48fa739efbd1485e79d5.1307292171.git.luto@mit.edu [ Removed the CONFIG option - it's simpler to just do it unconditionally. Tidied up the code as well. ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * x86-64: Fill unused parts of the vsyscall page with 0xccAndy Lutomirski2011-06-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Jumping to 0x00 might do something depending on the following bytes. Jumping to 0xcc is a trap. So fill the unused parts of the vsyscall page with 0xcc to make it useless for exploits to jump there. Signed-off-by: Andy Lutomirski <luto@mit.edu> Cc: Jesper Juhl <jj@chaosbits.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Arjan van de Ven <arjan@infradead.org> Cc: Jan Beulich <JBeulich@novell.com> Cc: richard -rw- weinberger <richard.weinberger@gmail.com> Cc: Mikael Pettersson <mikpe@it.uu.se> Cc: Andi Kleen <andi@firstfloor.org> Cc: Brian Gerst <brgerst@gmail.com> Cc: Louis Rilling <Louis.Rilling@kerlabs.com> Cc: Valdis.Kletnieks@vt.edu Cc: pageexec@freemail.hu Link: http://lkml.kernel.org/r/ed54bfcfbe50a9070d20ec1edbe0d149e22a4568.1307292171.git.luto@mit.edu Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * x86-64: Remove vsyscall number 3 (venosys)Andy Lutomirski2011-06-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It just segfaults since April 2008 (a4928cff), so I'm pretty sure that nothing uses it. And having an empty section makes the linker script a bit fragile. Signed-off-by: Andy Lutomirski <luto@mit.edu> Cc: Jesper Juhl <jj@chaosbits.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Arjan van de Ven <arjan@infradead.org> Cc: Jan Beulich <JBeulich@novell.com> Cc: richard -rw- weinberger <richard.weinberger@gmail.com> Cc: Mikael Pettersson <mikpe@it.uu.se> Cc: Andi Kleen <andi@firstfloor.org> Cc: Brian Gerst <brgerst@gmail.com> Cc: Louis Rilling <Louis.Rilling@kerlabs.com> Cc: Valdis.Kletnieks@vt.edu Cc: pageexec@freemail.hu Link: http://lkml.kernel.org/r/4a4abcf47ecadc269f2391a313576fe6d06acef7.1307292171.git.luto@mit.edu Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * x86-64: Map the HPET NXAndy Lutomirski2011-06-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently the HPET mapping is a user-accessible syscall instruction at a fixed address some of the time. A sufficiently determined hacker might be able to guess when. Signed-off-by: Andy Lutomirski <luto@mit.edu> Cc: Jesper Juhl <jj@chaosbits.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Arjan van de Ven <arjan@infradead.org> Cc: Jan Beulich <JBeulich@novell.com> Cc: richard -rw- weinberger <richard.weinberger@gmail.com> Cc: Mikael Pettersson <mikpe@it.uu.se> Cc: Andi Kleen <andi@firstfloor.org> Cc: Brian Gerst <brgerst@gmail.com> Cc: Louis Rilling <Louis.Rilling@kerlabs.com> Cc: Valdis.Kletnieks@vt.edu Cc: pageexec@freemail.hu Link: http://lkml.kernel.org/r/ab41b525a4ca346b1ca1145d16fb8d181861a8aa.1307292171.git.luto@mit.edu Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * x86-64: Remove kernel.vsyscall64 sysctlAndy Lutomirski2011-06-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It's unnecessary overhead in code that's supposed to be highly optimized. Removing it allows us to remove one of the two syscall instructions in the vsyscall page. The only sensible use for it is for UML users, and it doesn't fully address inconsistent vsyscall results on UML. The real fix for UML is to stop using vsyscalls entirely. Signed-off-by: Andy Lutomirski <luto@mit.edu> Cc: Jesper Juhl <jj@chaosbits.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Arjan van de Ven <arjan@infradead.org> Cc: Jan Beulich <JBeulich@novell.com> Cc: richard -rw- weinberger <richard.weinberger@gmail.com> Cc: Mikael Pettersson <mikpe@it.uu.se> Cc: Andi Kleen <andi@firstfloor.org> Cc: Brian Gerst <brgerst@gmail.com> Cc: Louis Rilling <Louis.Rilling@kerlabs.com> Cc: Valdis.Kletnieks@vt.edu Cc: pageexec@freemail.hu Link: http://lkml.kernel.org/r/973ae803fe76f712da4b2740e66dccf452d3b1e4.1307292171.git.luto@mit.edu Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * x86-64: Give vvars their own pageAndy Lutomirski2011-06-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move vvars out of the vsyscall page into their own page and mark it NX. Without this patch, an attacker who can force a daemon to call some fixed address could wait until the time contains, say, 0xCD80, and then execute the current time. Signed-off-by: Andy Lutomirski <luto@mit.edu> Cc: Jesper Juhl <jj@chaosbits.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Arjan van de Ven <arjan@infradead.org> Cc: Jan Beulich <JBeulich@novell.com> Cc: richard -rw- weinberger <richard.weinberger@gmail.com> Cc: Mikael Pettersson <mikpe@it.uu.se> Cc: Andi Kleen <andi@firstfloor.org> Cc: Brian Gerst <brgerst@gmail.com> Cc: Louis Rilling <Louis.Rilling@kerlabs.com> Cc: Valdis.Kletnieks@vt.edu Cc: pageexec@freemail.hu Link: http://lkml.kernel.org/r/b1460f81dc4463d66ea3f2b5ce240f58d48effec.1307292171.git.luto@mit.edu Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * x86-64: Document some of entry_64.SAndy Lutomirski2011-06-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Andy Lutomirski <luto@mit.edu> Cc: Jesper Juhl <jj@chaosbits.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Arjan van de Ven <arjan@infradead.org> Cc: Jan Beulich <JBeulich@novell.com> Cc: richard -rw- weinberger <richard.weinberger@gmail.com> Cc: Mikael Pettersson <mikpe@it.uu.se> Cc: Andi Kleen <andi@firstfloor.org> Cc: Brian Gerst <brgerst@gmail.com> Cc: Louis Rilling <Louis.Rilling@kerlabs.com> Cc: Valdis.Kletnieks@vt.edu Cc: pageexec@freemail.hu Link: http://lkml.kernel.org/r/fc134867cc550977cc996866129e11a16ba0f9ea.1307292171.git.luto@mit.edu Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * x86-64: Fix alignment of jiffies variableAndy Lutomirski2011-06-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It's declared __attribute__((aligned(16)) but it's explicitly not aligned. This is probably harmless but it's a bit embarrassing. Signed-off-by: Andy Lutomirski <luto@mit.edu> Cc: Jesper Juhl <jj@chaosbits.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Arjan van de Ven <arjan@infradead.org> Cc: Jan Beulich <JBeulich@novell.com> Cc: richard -rw- weinberger <richard.weinberger@gmail.com> Cc: Mikael Pettersson <mikpe@it.uu.se> Cc: Andi Kleen <andi@firstfloor.org> Cc: Brian Gerst <brgerst@gmail.com> Cc: Louis Rilling <Louis.Rilling@kerlabs.com> Cc: Valdis.Kletnieks@vt.edu Cc: pageexec@freemail.hu Link: http://lkml.kernel.org/r/5f3bc5542e9aaa9382d53f153f54373165cdef89.1307292171.git.luto@mit.edu Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | Merge branch 'x86-uv-for-linus' of ↵Linus Torvalds2011-07-22
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, UV: Correct UV2 BAU destination timeout x86, UV: Correct failed topology memory leak x86, UV: Remove cpumask_t from the stack x86, UV: Rename hubmask to pnmask x86, UV: Correct reset_with_ipi() x86, UV: Allow for non-consecutive sockets x86, UV: Inline header file functions x86, UV: Fix smp_processor_id() use in a preemptable region x66, UV: Enable 64-bit ACPI MFCG support for SGI UV2 platform x86, UV: Clean up uv_mmrs.h
| * | x86, UV: Correct UV2 BAU destination timeoutcpw@sgi.com2011-06-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Correct the UV2 broacast assist unit's destination timeout period. And the activation status register in UV2 should be tested for a destination timeout with a 4, not a 2. The values for Active versus Timeout were reversed. This patch is critical for TLB shootdown on an Altix UV2 system (i.e. the follow-on to the current Altix UV). Destination timeout period: The period is set in 4 bits of memory-mapped register MISC_CONTROL. The left bit toggles base period between 10us and 80us. The other 3 bits are the multiplier. Decimal 15, hex f, gives the maximum: 7 * 80us Signed-off-by: Cliff Wickman <cpw@sgi.com> Link: http://lkml.kernel.org/r/20110621122243.117324443@sgi.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86, UV: Correct failed topology memory leakcpw@sgi.com2011-06-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix a memory leak in init_per_cpu() when the topology check fails. The leak should never occur on deployed systems. It would only occur in an unexpected topology that would make the BAU unuseable as a result. Signed-off-by: Cliff Wickman <cpw@sgi.com> Link: http://lkml.kernel.org/r/20110621122242.981533045@sgi.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86, UV: Remove cpumask_t from the stackcpw@sgi.com2011-06-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove the large stack-resident cpumask_t from reset_with_ipi()'s stack by allocating one per uvhub. Due to the limited size of the stack the potentially huge cpumask_t may cause stack overrun. We haven't seen it happen yet, but we need to make it a practice not to push such structures onto the stack. Signed-off-by: Cliff Wickman <cpw@sgi.com> Reviewed-by: Pekka Enberg <penberg@kernel.org> Link: http://lkml.kernel.org/r/20110621122242.832589130@sgi.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86, UV: Rename hubmask to pnmaskcpw@sgi.com2011-06-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rename 'bau_targ_hubmask' to 'pnmask' for clarity. The BAU distribution bit mask is indexed by pnode number, not hub or blade number. This important fact is not clear while the mask is called a 'hubmask'. Signed-off-by: Cliff Wickman <cpw@sgi.com> Link: http://lkml.kernel.org/r/20110621122242.630995969@sgi.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86, UV: Correct reset_with_ipi()cpw@sgi.com2011-06-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix reset_with_ipi() to look up a cpu for a blade based on the distribution map being indexed by the potentially sparsely numbered pnode. This patch is critical to tlb shootdown on a partitioned UV system, or one with nonconsecutive blade numbers. The distribution map bits represent pnodes relative to the partition base pnode. Previous to this patch it had been assuming bits based on 0-based, consecutive blade ids. Signed-off-by: Cliff Wickman <cpw@sgi.com> Link: http://lkml.kernel.org/r/20110621122242.497700003@sgi.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86, UV: Allow for non-consecutive socketscpw@sgi.com2011-06-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix for the topology in which there is a socket 1 on a blade with no socket 0. Only call make_per_cpu_thp() for present sockets. We have only seen this fail for internal configurations. Signed-off-by: Cliff Wickman <cpw@sgi.com> Link: http://lkml.kernel.org/r/20110621122242.363757364@sgi.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86, UV: Inline header file functionscpw@sgi.com2011-06-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make all the functions in uv_bau.h inline so that it can be included in the fake prom (used in simulations). If not inlined the unused functions will generate compiler warnings. Signed-off-by: Cliff Wickman <cpw@sgi.com> Reviewed-by: Pekka Enberg <penberg@kernel.org> Link: http://lkml.kernel.org/r/20110621122242.230529678@sgi.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86, UV: Fix smp_processor_id() use in a preemptable regioncpw@sgi.com2011-06-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix a call by tunables_write() to smp_processor_id() within a preemptable region. Call get_cpu()/put_cpu() around the region where the returned cpu number is actually used, which makes it non-preemptable. A DEBUG_PREEMPT warning is prevented. UV does not support cpu hotplug yet, but this is a step toward that ability as well. Signed-off-by: Cliff Wickman <cpw@sgi.com> Link: http://lkml.kernel.org/r/20110621122242.086384966@sgi.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x66, UV: Enable 64-bit ACPI MFCG support for SGI UV2 platformJack Steiner2011-06-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Enable 64-bit ACPI MFCG support for SGI UV2 platform. The check is similar to the check on UV1. UV2 has a different oem_id string. Signed-off-by: Jack Steiner <steiner@sgi.com> Link: http://lkml.kernel.org/r/20110602195943.GA27079@sgi.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86, UV: Clean up uv_mmrs.hJack Steiner2011-05-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | No code changes. Reformat definitions to make it more readable. I fixed alignment of comments in the structure definitions. Also aligned comments and most field definitions & values. Also sorted the defines for the SHIFT & MASK values for each MMR. This make the file visually much more acceptable. Some of the symbol names are still quite long. The file is based on post-processing of verilog definitions that are used for the node controller chip design. Although some symbol names are not what I would chose, I would like to maintain compatibility with the names used by the chip designers. We have a number of cross-reference utilities & having common names is important. Signed-off-by: Jack Steiner <steiner@sgi.com> Link: http://lkml.kernel.org/r/20110527145256.GA31224@sgi.com Signed-off-by: Ingo Molnar <mingo@elte.hu> -- arch/x86/include/asm/uv/uv_mmrs.h | 2873 +++++++++++++++++++++----------------- 1 file changed, 1600 insertions(+), 1273 deletions(-)
* | | Merge branch 'x86-signal-for-linus' of ↵Linus Torvalds2011-07-22
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-signal-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: Kill handle_signal()->set_fs() x86, do_signal: Simplify the TS_RESTORE_SIGMASK logic x86, signals: Convert the X86_32 code to use set_current_blocked() x86, signals: Convert the IA32_EMULATION code to use set_current_blocked()
| * | | x86: Kill handle_signal()->set_fs()Oleg Nesterov2011-07-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | handle_signal()->set_fs() has a nice comment which explains what set_fs() is, but it doesn't explain why it is needed and why it depends on CONFIG_X86_64. Afaics, the history of this confusion is: 1. I guess today nobody can explain why it was needed in arch/i386/kernel/signal.c, perhaps it was always wrong. This predates 2.4.0 kernel. 2. then it was copy-and-past'ed to the new x86_64 arch. 3. then it was removed from i386 (but not from x86_64) by b93b6ca3 "i386: remove unnecessary code". 4. then it was reintroduced under CONFIG_X86_64 when x86 unified i386 and x86_64, because the patch above didn't touch x86_64. Remove it. ->addr_limit should be correct. Even if it was possible that it is wrong, it is too late to fix it after setup_rt_frame(). Linus commented in: http://lkml.kernel.org/r/alpine.LFD.0.999.0707170902570.19166@woody.linux-foundation.org ... about the equivalent bit from i386: Heh. I think it's entirely historical. Please realize that the whole reason that function is called "set_fs()" is that it literally used to set the %fs segment register, not "->addr_limit". So I think the "set_fs(USER_DS)" is there _only_ to match the other regs->xds = __USER_DS; regs->xes = __USER_DS; regs->xss = __USER_DS; regs->xcs = __USER_CS; things, and never mattered. And now it matters even less, and has been copied to all other architectures where it is just totally insane. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Link: http://lkml.kernel.org/r/20110710164424.GA20261@redhat.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| * | | x86, do_signal: Simplify the TS_RESTORE_SIGMASK logicOleg Nesterov2011-07-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1. do_signal() looks at TS_RESTORE_SIGMASK and calculates the mask which should be stored in the signal frame, then it passes "oldset" to the callees, down to setup_rt_frame(). This is ugly, setup_rt_frame() can do this itself and nobody else needs this sigset_t. Move this code into setup_rt_frame. 2. do_signal() also clears TS_RESTORE_SIGMASK if handle_signal() succeeds. We can move this to setup_rt_frame() as well, this avoids the unnecessary checks and makes the logic more clear. 3. use set_current_blocked() instead of sigprocmask(SIG_SETMASK), sigprocmask() should be avoided. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Link: http://lkml.kernel.org/r/20110710182203.GA27979@redhat.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| * | | x86, signals: Convert the X86_32 code to use set_current_blocked()Oleg Nesterov2011-07-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | sys_sigsuspend() and sys_sigreturn() change ->blocked directly. This is not correct, see the changelog in e6fa16ab "signal: sigprocmask() should do retarget_shared_pending()" Change them to use set_current_blocked(). Signed-off-by: Oleg Nesterov <oleg@redhat.com> Link: http://lkml.kernel.org/r/20110710192727.GA31759@redhat.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| * | | x86, signals: Convert the IA32_EMULATION code to use set_current_blocked()Oleg Nesterov2011-07-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | sys32_sigsuspend() and sys32_*sigreturn() change ->blocked directly. This is not correct, see the changelog in e6fa16ab "signal: sigprocmask() should do retarget_shared_pending()" Change them to use set_current_blocked(). Signed-off-by: Oleg Nesterov <oleg@redhat.com> Link: http://lkml.kernel.org/r/20110710192724.GA31755@redhat.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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