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* x86, relocs: When printing an error, say relative or absoluteH. Peter Anvin2012-05-18
| | | | | | | | When the relocs tool throws an error, let the error message say if it is an absolute or relative symbol. This should make it a lot more clear what action the programmer needs to take. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* x86, relocs: More relocations which may end up as absoluteH. Peter Anvin2012-05-18
| | | | | | | | | | | | | | | | | | | | | GNU ld 2.22.52.0.1 has a bug that it blindly changes symbols from section-relative to absolute if they are in a section of zero length. This turns the symbols __init_begin and __init_end into absolute symbols. Let the relocs program know that those should be treated as relative symbols. This bug is exposed by checkin 433de739bbc2 x86, realmode: 16-bit real-mode code support for relocs tool only in the sense that that checkin changes the relocs tool to report an error instead of silently generating a kernel which is broken if relocated. Reported-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Cc: H.J. Lu <hjl.tools@gmail.com> Cc: Jarkko Sakkinen <jarkko.sakkinen@intel.com>
* x86, relocs: Workaround for binutils 2.22.52.0.1 section bugH. Peter Anvin2012-05-18
| | | | | | | | | | | | GNU ld 2.22.52.0.1 has a bug that it blindly changes symbols from section-relative to absolute if they are in a section of zero length. This turns the symbols __init_begin and __init_end into absolute symbols. Let the relocs program know that those should be treated as relative symbols. Reported-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Cc: H.J. Lu <hjl.tools@gmail.com>
* xen-acpi-processor: Add missing #include <xen/xen.h>H. Peter Anvin2012-05-17
| | | | | | | | | | | | | | This file depends on <xen/xen.h>, but the dependency was hidden due to: <asm/acpi.h> -> <asm/trampoline.h> -> <asm/io.h> -> <xen/xen.h> With the removal of <asm/trampoline.h>, this exposed the missing Reported-by: Ingo Molnar <mingo@kernel.org> Cc: Len Brown <lenb@kernel.org> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Jarkko Sakkinen <jarkko.sakkinen@intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* acpi, bgrd: Add missing <linux/io.h> to drivers/acpi/bgrt.cH. Peter Anvin2012-05-17
| | | | | | | | | | | | | The ACPI BGRT driver uses ioremap() and memcpy_fromio(), which means it needs to #include <linux/io.h>. [ hpa: This was hidden because <asm/acpi.h> used to include <asm/trampoline.h>, which then included <asm/io.h> ] Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Link: http://lkml.kernel.org/r/1336597442-9399-1-git-send-email-hpa@linux.intel.com Cc: Matthew Garrett <mjg@redhat.com> Cc: Len Brown <lenb@kernel.org>
* x86, realmode: Change EFER to a single u64 fieldH. Peter Anvin2012-05-16
| | | | | | | | | | | Change EFER to be a single u64 field instead of two u32 fields; change the order to maintain alignment. Note that on x86-64 cr4 is really also a 64-bit quantity, although we can only set the low 32 bits from the trampoline code since it is still executing in 32-bit mode at that point. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Cc: Jarkko Sakkinen <jarkko.sakkinen@intel.com>
* x86, realmode: Move kernel/realmode.c to realmode/init.cH. Peter Anvin2012-05-16
| | | | | | | | Keep all the realmode code together, including initialization (only the rm/ subdirectory is actually built as real-mode code, anyway.) Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Cc: Jarkko Sakkinen <jarkko.sakkinen@intel.com>
* x86, realmode: Move not-common bits out of trampoline_common.SH. Peter Anvin2012-05-16
| | | | | | | | | | Move the bits that aren't actually common out of trampoline_common.S and into the arch-specific files. Furthermore, make sure the page directory is first in the .bss section for trampoline_64.S in order to not waste an entire page of memory. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Cc: Jarkko Sakkinen <jarkko.sakkinen@intel.com>
* x86, realmode: Mask out EFER.LMA when saving trampoline EFERH. Peter Anvin2012-05-16
| | | | | | | | | | | Some AMD processors apparently #GP(0) if EFER.LMA is set in WRMSR, rather than ignoring it. Thus, we need to mask it out. Reported-by: Ingo Molnar <mingo@kernel.org> Tested-by: Borislav Petkov <bp@alien8.de> Cc: Jarkko Sakkinen <jarkko.sakkinen@intel.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Link: http://lkml.kernel.org/r/1336501366-28617-24-git-send-email-jarkko.sakkinen@intel.com
* x86, realmode: Fix no cache bits test in reboot_32.SJarkko Sakkinen2012-05-10
| | | | | | | | | | | | | | | | | | | | | | | | | | Before the new real-mode code infrastructure %edx was used for testing CD and NW bits with andl in order to decide whether to flush the processor caches or not. The value of cr0 was also stored in %eax, which was later used to set cr0 after masking out lower byte (except TS bit) in order to enter real-mode. In the new real-mode code infrastructure we wanted to keep input parameter in %eax so we are using %edx for both cr0 cases. This has caused regression since andl overwrites the value of %edx. This patch fixes the issue by replacing andl with testl, which is essentially andl without writing result to the register. Special thanks to Paolo Bonzini for noting this and proposing a fix. Reported-and-tested-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@intel.com> Link: http://lkml.kernel.org/r/1336633898-23743-1-git-send-email-jarkko.sakkinen@intel.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* x86, realmode: Make sure all generated files are listed in targetsH. Peter Anvin2012-05-09
| | | | | | | | | | Kbuild expects all generated files to be listed in the targets variable. If it isn't, weird things happen. Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Michal Marek <mmarek@suse.cz> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Link: http://lkml.kernel.org/r/1336595106-21135-1-git-send-email-jarkko.sakkinen@intel.com
* x86, realmode: build fix: remove duplicate buildJarkko Sakkinen2012-05-09
| | | | | | | | | | | | | | | Real-mode binary was built twice. This patch fixes the issue by making realmode.relocs as target for realmode.bin. [ hpa: removed the direct dependency on realmode.relocs in arch/x86/realmode/Makefile ] Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@intel.com> Link: http://lkml.kernel.org/r/1336595106-21135-1-git-send-email-jarkko.sakkinen@intel.com Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Michal Marek <mmarek@suse.cz> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* x86, realmode: read cr4 and EFER from kernel for 64-bit trampolineJarkko Sakkinen2012-05-08
| | | | | | | | | | This patch changes 64-bit trampoline so that CR4 and EFER are provided by the kernel instead of using fixed values. Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@intel.com> Link: http://lkml.kernel.org/r/1336501366-28617-24-git-send-email-jarkko.sakkinen@intel.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* x86, realmode: fixes compilation issue in tboot.cJarkko Sakkinen2012-05-08
| | | | | | | | Fixed include path of wakeup.h in tboot.c. Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@intel.com> Link: http://lkml.kernel.org/r/1336501366-28617-23-git-send-email-jarkko.sakkinen@intel.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* x86, realmode: move relocs from scripts/ to arch/x86/toolsJarkko Sakkinen2012-05-08
| | | | | | | | | | | | Moved relocs tool from scripts/ to arch/x86/tools because it is architecture specific script. Added new target archscripts that can be used to build scripts needed building an architecture. Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@intel.com> Link: http://lkml.kernel.org/r/1336501366-28617-22-git-send-email-jarkko.sakkinen@intel.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Michal Marek <mmarek@suse.cz>
* x86, realmode: header for trampoline codeJarkko Sakkinen2012-05-08
| | | | | | | | | | | | Added header for trampoline code that can be used to supply input data to it. This makes interface between real mode code and kernel cleaner and simpler. Replaced two confusing pointers to level4 pgt in trampoline_64.S with a single pointer to the beginning of the page table. Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@intel.com> Link: http://lkml.kernel.org/r/1336501366-28617-21-git-send-email-jarkko.sakkinen@intel.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* x86, realmode: flattened rm hierachyJarkko Sakkinen2012-05-08
| | | | | | | | | | | Simplified hierarchy under rm directory to a flat directory because it is not anymore really justified to have own directory for wakeup code. It only adds more complexity. Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@intel.com> Link: http://lkml.kernel.org/r/1336501366-28617-20-git-send-email-jarkko.sakkinen@intel.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* x86, realmode: don't copy real_mode_headerJarkko Sakkinen2012-05-08
| | | | | | | | | Replaced copying of real_mode_header with a pointer to beginning of RM memory. Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@intel.com> Link: http://lkml.kernel.org/r/1336501366-28617-19-git-send-email-jarkko.sakkinen@intel.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* x86, realmode: fix 64-bit wakeup sequenceJarkko Sakkinen2012-05-08
| | | | | | | | | | | | | | | | | | | | | | There were number of issues in wakeup sequence: - Wakeup stack was placed in hardcoded address. - NX bit in EFER was not enabled. - Initialization incorrectly set physical address of secondary_startup_64. - Some alignment issues. This patch fixes these issues and in addition: - Unifies coding conventions in .S files. - Sets alignments of code and data right. Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@intel.com> Link: http://lkml.kernel.org/r/1336501366-28617-18-git-send-email-jarkko.sakkinen@intel.com Originally-by: H. Peter Anvin <hpa@linux.intel.com> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Len Brown <len.brown@intel.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* x86, realmode: Fix always-zero test in reboot_32.SH. Peter Anvin2012-05-08
| | | | | | | | | A test instruction is an "and", and an and with zero is always zero. This would cause us to always take the BIOS path, not the APM path, in case anyone actually cares... Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Link: http://lkml.kernel.org/r/1336501366-28617-17-git-send-email-jarkko.sakkinen@intel.com
* x86, realmode: Move trampoline_*.S early in the link orderH. Peter Anvin2012-05-08
| | | | | | | | | | Move trampoline_*.S earlier in the link order so it ends up being first in the text segment; since the SIPI vector requires 4K alignment it otherwise ends up padding the .text segment with that much completely unnecessarily. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Link: http://lkml.kernel.org/r/1336501366-28617-16-git-send-email-jarkko.sakkinen@intel.com
* x86, realmode: Replace open-coded ljmpw with a macroH. Peter Anvin2012-05-08
| | | | | | | | | | | | | | | We cannot code an ljmpw to the real-mode segment directly, because gas refuses to assemble an ljmp with a symbolic segment. Instead of open-coding it everywhere, define a macro and use it for this case. This is specifically an ljmpw from a 16-bit segment. This is okay, as one should never enter real mode from a 32-bit segment: if one do, the CPU ends up in a bizarre (and useless) mode sometimes called "unreal mode" where segments behave like real mode but the default address and operand sizes is 32 bits. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Link: http://lkml.kernel.org/r/1336501366-28617-15-git-send-email-jarkko.sakkinen@intel.com
* x86, realmode: Remove indirect jumps in trampoline_32 and wakeup_asmH. Peter Anvin2012-05-08
| | | | | | | | | | | | Remove indirect jumps in trampoline_32.S and the 32-bit part of wakeup_asm.S. There exist systems which are known to do weird things if an SMI comes in right after a mode switch, and the safest way to deal with it is to always follow with a simple absolute far jump. In the 64-bit code we then to a register indirect near jump; follow that pattern for the 32-bit code. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Link: http://lkml.kernel.org/r/1336501366-28617-14-git-send-email-jarkko.sakkinen@intel.com
* x86, realmode: Remove indirect jumps in trampoline_64.SH. Peter Anvin2012-05-08
| | | | | | | | | Remove indirect jumps in trampoline_64.S which are no longer necessary: the realmode code can relocate the absolute jumps correctly from the start. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Link: http://lkml.kernel.org/r/1336501366-28617-13-git-send-email-jarkko.sakkinen@intel.com
* x86, realmode: Align .data section in trampoline_32.SH. Peter Anvin2012-05-08
| | | | | | | Specify the alignment of the .data section in trampoline_32.S. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Link: http://lkml.kernel.org/r/1336501366-28617-12-git-send-email-jarkko.sakkinen@intel.com
* x86, realmode: Move bits to the proper sections in trampoline_64.SH. Peter Anvin2012-05-08
| | | | | | | | | | Move various bits to the sections they really belong in in trampoline_64.S. Use GLOBAL() rather than ENTRY() for data objects: ENTRY() should only be used with code and forces alignment to 16 bytes. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Link: http://lkml.kernel.org/r/1336501366-28617-11-git-send-email-jarkko.sakkinen@intel.com
* x86, realmode: Add .text64 section, make barrier symbols absoluteH. Peter Anvin2012-05-08
| | | | | | | | | | | | Add a .text64 section. The purpose of this is to keep 16-, 32- and 64-bit code segregated into separate sections, mainly to keep disassembly sane. Move barrier symbols out of sections to avoid the "symbol in empty section" problem in some versions of GNU ld. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Link: http://lkml.kernel.org/r/1336501366-28617-10-git-send-email-jarkko.sakkinen@intel.com
* x86, realmode: Allow absolute pa_* symbols in the realmode codeH. Peter Anvin2012-05-08
| | | | | | | | | Allow pa_* symbols to be absolute (outside any section) in the realmode linker script. Some versions of GNU ld are known to be unhappy about symbols defined in a section that is otherwise empty. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Link: http://lkml.kernel.org/r/1336501366-28617-9-git-send-email-jarkko.sakkinen@intel.com
* x86, realmode: Set permission for real mode pagesJarkko Sakkinen2012-05-08
| | | | | | | | | | Set proper permissions for rodata, text and data, removing the realmode trampoline area as a remaining RWX memory mapping in the kernel. Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@intel.com> Link: http://lkml.kernel.org/r/1336501366-28617-8-git-send-email-jarkko.sakkinen@intel.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* x86, realmode: Move ACPI wakeup to unified realmode codeJarkko Sakkinen2012-05-08
| | | | | | | | | | | | | Migrated ACPI wakeup code to the real-mode blob. Code existing in .x86_trampoline can be completely removed. Static descriptor table in wakeup_asm.S is courtesy of H. Peter Anvin. Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@intel.com> Link: http://lkml.kernel.org/r/1336501366-28617-7-git-send-email-jarkko.sakkinen@intel.com Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Len Brown <len.brown@intel.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* x86, realmode: Move SMP trampoline to unified realmode codeJarkko Sakkinen2012-05-08
| | | | | | | | | | | | | | | Migrated SMP trampoline code to the real mode blob. SMP trampoline code is not yet removed from .x86_trampoline because it is needed by the wakeup code. [ hpa: always enable compiling startup_32_smp in head_32.S... it is only a few instructions which go into .init on UP builds, and it makes the rest of the code less #ifdef ugly. ] Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@intel.com> Link: http://lkml.kernel.org/r/1336501366-28617-6-git-send-email-jarkko.sakkinen@intel.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* x86, realmode: Move reboot_32.S to unified realmode codeJarkko Sakkinen2012-05-08
| | | | | | | | | Migrated reboot_32.S from x86_trampoline to the real-mode blob. Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@intel.com> Link: http://lkml.kernel.org/r/1336501366-28617-5-git-send-email-jarkko.sakkinen@intel.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* x86, realmode: Relocator for realmode codeJarkko Sakkinen2012-05-08
| | | | | | | | | | | Implements relocator for real mode code that is called as part of setup_arch(). Processes segment relocations and linear relocations. Real-mode code is relocated to a free hole below 1 MB. Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@intel.com> Link: http://lkml.kernel.org/r/1336501366-28617-4-git-send-email-jarkko.sakkinen@intel.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* x86, realmode: realmode.bin infrastructureJarkko Sakkinen2012-05-08
| | | | | | | | | | | | | | | | | | Create realmode.bin and realmode.relocs files. Piggy pack them into relocatable object that will be included into .init.data section of the main kernel image. The first file includes binary image of the real-mode code. The latter file includes all relocations. The layout of the binary image is specified in realmode.lds.S. The makefile generates pa_ prefixed symbols for each exported global. These are used in 32-bit code and in realmode header to define symbols that need to be relocated. Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@intel.com> Link: http://lkml.kernel.org/r/1336501366-28617-3-git-send-email-jarkko.sakkinen@intel.com Originally-by: H. Peter Anvin <hpa@linux.intel.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* x86, realmode: 16-bit real-mode code support for relocs toolH. Peter Anvin2012-05-08
| | | | | | | | | | | | | | | | | | | | | | | | | | A new option is added to the relocs tool called '--realmode'. This option causes the generation of 16-bit segment relocations and 32-bit linear relocations for the real-mode code. When the real-mode code is moved to the low-memory during kernel initialization, these relocation entries can be used to relocate the code properly. In the assembly code 16-bit segment relocations must be relative to the 'real_mode_seg' absolute symbol. Linear relocations must be relative to a symbol prefixed with 'pa_'. 16-bit segment relocation is used to load cs:ip in 16-bit code. Linear relocations are used in the 32-bit code for relocatable data references. They are declared in the linker script of the real-mode code. The relocs tool is moved to scripts/x86-relocs.c so it will be compiled before building the arch/x86 tree. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Link: http://lkml.kernel.org/r/1336501366-28617-2-git-send-email-jarkko.sakkinen@intel.com Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@intel.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* Linux 3.4-rc6Linus Torvalds2012-05-06
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* Merge branch 'x86-urgent-for-linus' of ↵Linus Torvalds2012-05-06
|\ | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fixes form Peter Anvin * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: intel_mid_powerbtn: mark irq as IRQF_NO_SUSPEND arch/x86/platform/geode/net5501.c: change active_low to 0 for LED driver x86, relocs: Remove an unused variable asm-generic: Use __BITS_PER_LONG in statfs.h x86/amd: Re-enable CPU topology extensions in case BIOS has disabled it
| * intel_mid_powerbtn: mark irq as IRQF_NO_SUSPENDYong Wang2012-05-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | So that the power button still wakes up the platform. Signed-off-by: Pierre Tardy <pierre.tardy@intel.com> Link: http://lkml.kernel.org/r/20120504210244.F2EA5A018B@akpm.mtv.corp.google.com Tested-by: Kangkai Yin <kangkai.yin@intel.com> Tested-by: Yong Wang <yong.y.wang@intel.com> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Cc: Matthew Garrett <mjg@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| * arch/x86/platform/geode/net5501.c: change active_low to 0 for LED driverBjarke Istrup Pedersen2012-05-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It seems that there was an error with the active_low = 1 for the LED, since it should be set to 0 (meaning that active is high, since 0 is false, hence the confusion. The wiki article about it confuses it, since it contradicts itself, regarding what turns on the LED. I have tested 3.4-rc2 on my net5501 with this patch, and it makes the LED behave correctly, where "none" turns it off, and "default-on" turns it on, when echoed onto the trigger "file" in /sys/class/leds. Signed-off-by: Bjarke Istrup Pedersen <gurligebis@gentoo.org> Link: http://lkml.kernel.org/r/20120504210146.62186A018B@akpm.mtv.corp.google.com Cc: Philip Prindeville <philipp@redfish-solutions.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| * x86, relocs: Remove an unused variableKusanagi Kouichi2012-04-30
| | | | | | | | | | | | | | | | | | | | | | | | sh_symtab is set but not used. [ hpa: putting this in urgent because of the sheer harmlessness of the patch: it quiets a build warning but does not change any generated code. ] Signed-off-by: Kusanagi Kouichi <slash@ac.auone-net.jp> Link: http://lkml.kernel.org/r/20120401082932.D5E066FC03D@msa105.auone-net.jp Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Cc: <stable@vger.kernel.org>
| * asm-generic: Use __BITS_PER_LONG in statfs.hH. Peter Anvin2012-04-30
| | | | | | | | | | | | | | | | | | | | | | | | | | <asm-generic/statfs.h> is exported to userspace, so using BITS_PER_LONG is invalid. We need to use __BITS_PER_LONG instead. This is kernel bugzilla 43165. Reported-by: H.J. Lu <hjl.tools@gmail.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Link: http://lkml.kernel.org/r/1335465916-16965-1-git-send-email-hpa@linux.intel.com Acked-by: Arnd Bergmann <arnd@arndb.de> Cc: <stable@vger.kernel.org>
| * x86/amd: Re-enable CPU topology extensions in case BIOS has disabled itAndreas Herrmann2012-04-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BIOS will switch off the corresponding feature flag on family 15h models 10h-1fh non-desktop CPUs. The topology extension CPUID leafs are required to detect which cores belong to the same compute unit. (thread siblings mask is set accordingly and also correct information about L1i and L2 cache sharing depends on this). W/o this patch we wouldn't see which cores belong to the same compute unit and also cache sharing information for L1i and L2 would be incorrect on such systems. Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com> Signed-off-by: Ingo Molnar <mingo@kernel.org>
* | Merge branch 'for-linus' of ↵Linus Torvalds2012-05-06
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs Pull btrfs fixes from Chris Mason: "The big ones here are a memory leak we introduced in rc1, and a scheduling while atomic if the transid on disk doesn't match the transid we expected. This happens for corrupt blocks, or out of date disks. It also fixes up the ioctl definition for our ioctl to resolve logical inode numbers. The __u32 was a merging error and doesn't match what we ship in the progs." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: Btrfs: avoid sleeping in verify_parent_transid while atomic Btrfs: fix crash in scrub repair code when device is missing btrfs: Fix mismatching struct members in ioctl.h Btrfs: fix page leak when allocing extent buffers Btrfs: Add properly locking around add_root_to_dirty_list
| * | Btrfs: avoid sleeping in verify_parent_transid while atomicChris Mason2012-05-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | verify_parent_transid needs to lock the extent range to make sure no IO is underway, and so it can safely clear the uptodate bits if our checks fail. But, a few callers are using it with spinlocks held. Most of the time, the generation numbers are going to match, and we don't want to switch to a blocking lock just for the error case. This adds an atomic flag to verify_parent_transid, and changes it to return EAGAIN if it needs to block to properly verifiy things. Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * | Btrfs: fix crash in scrub repair code when device is missingStefan Behrens2012-05-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix that when scrub tries to repair an I/O or checksum error and one of the devices containing the mirror is missing, it crashes in bio_add_page because the bdev is a NULL pointer for missing devices. Reported-by: Marco L. Crociani <marco.crociani@gmail.com> Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * | btrfs: Fix mismatching struct members in ioctl.hAlexander Block2012-05-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | Fix the size members of btrfs_ioctl_ino_path_args and btrfs_ioctl_logical_ino_args. The user space btrfs-progs utilities used __u64 and the kernel headers used __u32 before. Signed-off-by: Alexander Block <ablock84@googlemail.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * | Btrfs: fix page leak when allocing extent buffersJosef Bacik2012-05-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If we happen to alloc a extent buffer and then alloc a page and notice that page is already attached to an extent buffer, we will only unlock it and free our existing eb. Any pages currently attached to that eb will be properly freed, but we don't do the page_cache_release() on the page where we noticed the other extent buffer which can cause us to leak pages and I hope cause the weird issues we've been seeing in this area. Thanks, Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * | Btrfs: Add properly locking around add_root_to_dirty_listChris Mason2012-05-04
| | | | | | | | | | | | | | | | | | | | | add_root_to_dirty_list happens once at the very beginning of the transaction, but it is still racey. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* | | x86: fix broken TASK_SIZE for ia32_aoutAl Viro2012-05-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | Setting TIF_IA32 in load_aout_binary() used to be enough; these days TASK_SIZE is controlled by TIF_ADDR32 and that one doesn't get set there. Switch to use of set_personality_ia32()... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | Merge branch 'for-linus' of ↵Linus Torvalds2012-05-05
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/mattst88/alpha Pull alpha fixes from Matt Turner: "My alpha tree is back up (after taking quite some time to get my GPG key signed). It contains just some simple fixes." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mattst88/alpha: alpha: silence 'const' warning in sys_marvel.c alpha: include module.h to fix modpost on Tsunami alpha: properly define get/set_rtc_time on Marvel/SMP alpha: VGA_HOSE depends on VGA_CONSOLE
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