- 05 5月, 2013 11 次提交
-
-
由 Peter Zijlstra 提交于
We should always have proper privileges when requesting kernel data. Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Cc: <stable@kernel.org> Cc: Andi Kleen <ak@linux.intel.com> Cc: eranian@google.com Link: http://lkml.kernel.org/r/20130503121256.230745028@chello.nl [ Fix build error reported by fengguang.wu@intel.com, propagate error code back. ] Signed-off-by: NIngo Molnar <mingo@kernel.org> Link: http://lkml.kernel.org/n/tip-v0x9ky3ahzr6nm3c6ilwrili@git.kernel.org
-
由 Al Viro 提交于
Cc: vger.kernel.org Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
-
由 Al Viro 提交于
Cc: stable@vger.kernel.org Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
-
由 Al Viro 提交于
Cc: stable@vger.kernel.org Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
-
由 Al Viro 提交于
Cc: stable@vger.kernel.org Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
-
由 Al Viro 提交于
Cc: stable@vger.kernel.org Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
-
由 Al Viro 提交于
Cc: stable@vger.kernel.org Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
-
由 Al Viro 提交于
Cc: stable@vger.kernel.org Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
-
由 Andreas Larsson 提交于
This is needed because when scan_of_devices finds the GAISLER_GPTIMER core that corresponds to the SMP "ticker" timer, the previously set proper irq flow handler gets overwritten with an incorrect one. This leads to very flaky timer interrupt handling on some hardware. Proper updates to handlers can still be done using leon_update_virq_handling. Signed-off-by: NAndreas Larsson <andreas@gaisler.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
-
由 Federico Vaga 提交于
The vio_remove() function uses device_find_child() but it does not drop the reference of the retrieved child. Signed-off-by: NFederico Vaga <federico.vaga@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
-
由 Al Viro 提交于
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
-
- 04 5月, 2013 2 次提交
-
-
由 Peter Zijlstra 提交于
The LBR 'from' adddress is under full userspace control; ensure we validate it before reading from it. Note: is_module_text_address() can potentially be quite expensive; for those running into that with high overhead in modules optimize it using an RCU backed rb-tree. Reported-by: NAndi Kleen <ak@linux.intel.com> Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Cc: <stable@kernel.org> Cc: eranian@google.com Link: http://lkml.kernel.org/r/20130503121256.158211806@chello.nlSigned-off-by: NIngo Molnar <mingo@kernel.org> Link: http://lkml.kernel.org/n/tip-mk8i82ffzax01cnqo829iy1q@git.kernel.org
-
由 Peter Zijlstra 提交于
Errata BV98 states that all MEM_*_RETIRED events corrupt the counter value of the SMT sibling's counters. Blacklist these events Reported-by: NAndi Kleen <ak@linux.intel.com> Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Cc: <stable@kernel.org> Cc: eranian@google.com Link: http://lkml.kernel.org/r/20130503121256.083340271@chello.nlSigned-off-by: NIngo Molnar <mingo@kernel.org> Link: http://lkml.kernel.org/n/tip-jwra43mujrv1oq9xk6mfe57v@git.kernel.org
-
- 03 5月, 2013 9 次提交
-
-
由 Heiko Carstens 提交于
Simplify the memory detection code a bit by removing the CHUNK_OLDMEM and CHUNK_CRASHK memory types. They are not needed. Everything that is needed is a mechanism to insert holes into the detected memory. Reviewed-by: NMichael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
-
由 Martin Schwidefsky 提交于
Add a notifier for kvm to get control before a page table entry is invalidated. The notifier is only called for ptes of an address space with pgstes that have been explicitly marked to require notification. Kvm will use this to get control before prefix pages of virtual CPU are unmapped. Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
-
由 Jan Kiszka 提交于
With VMX, enable_irq_window can now return -EBUSY, in which case an immediate exit shall be requested before entering the guest. Account for this also in enable_nmi_window which uses enable_irq_window in absence of vnmi support, e.g. Reviewed-by: NPaolo Bonzini <pbonzini@redhat.com> Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
-
由 Russell King 提交于
s5p_register_gpio_interrupt() returns 0 or positive for success, and -ve for errors, so just use the standard >= 0 test. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
-
由 Russell King 提交于
device_register() returns -ve values for errors, and zero for success. There's no need to obfuscate the code with IS_ERR_VALUE(). Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
-
由 Russell King 提交于
Consistently check errors using the usual method used in the kernel for much of its history. For instance: int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t) { int div; div = gpmc_calc_divider(t->sync_clk); if (div < 0) return div; static int gpmc_set_async_mode(int cs, struct gpmc_timings *t) { ... return gpmc_cs_set_timings(cs, t); ..... ret = gpmc_set_async_mode(gpmc_onenand_data->cs, &t); if (IS_ERR_VALUE(ret)) return ret; So, gpmc_cs_set_timings() thinks any negative return value is an error, but where we check that in higher levels, only a limited range are errors... There is only _one_ use of IS_ERR_VALUE() in arch/arm which is really appropriate, and that is in arch/arm/include/asm/syscall.h: static inline long syscall_get_error(struct task_struct *task, struct pt_regs *regs) { unsigned long error = regs->ARM_r0; return IS_ERR_VALUE(error) ? error : 0; } because this function really does have to differentiate between error return values and addresses which look like negative numbers (eg, from mmap()). So, here's a patch to remove them from OMAP, except for the above. Acked-by: NTony Lindgren <tony@atomide.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
-
由 Russell King 提交于
omap_hwmod_lookup() only returns NULL on error, never an error pointer. Checking the returned pointer using IS_ERR_OR_NULL() is needless overhead. Use a simple !ptr check instead. OMAP devices (oh->od) always have a valid platform device attached (see omap_device_alloc()) so there's no point validating the platform device pointer (we will have already oopsed long before if this is not the case here.) Lastly, oh->od is only ever NULL or a valid omap device pointer - 'oh' comes from the statically declared hwmod tables, and the pointer is only filled in by omap_device_alloc() at a point where the omap device pointer must be valid. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
-
由 H. Peter Anvin 提交于
During early init, we would incorrectly set the NX bit even if the NX feature was not supported. Instead, only set this bit if NX is actually available and enabled. We already do very early detection of the NX bit to enable it in EFER, this simply extends this detection to the early page table mask. Reported-by: NFernando Luis Vázquez Cao <fernando@oss.ntt.co.jp> Signed-off-by: NH. Peter Anvin <hpa@linux.intel.com> Link: http://lkml.kernel.org/r/1367476850.5660.2.camel@nexus Cc: <stable@vger.kernel.org> v3.9
-
由 Konrad Rzeszutek Wilk 提交于
The git commite7a5cd06 ("x86-64, gdt: Store/load GDT for ACPI S3 or hibernate/resume path is not needed.") assumes that for the hibernate path the booting kernel and the resuming kernel MUST be the same. That is certainly the case for a 32-bit kernel (see check_image_kernel and CONFIG_ARCH_HIBERNATION_HEADER config option). However for 64-bit kernels it is OK to have a different kernel version (and size of the image) of the booting and resuming kernels. Hence the above mentioned git commit introduces an regression. This patch fixes it by introducing a 'struct desc_ptr gdt_desc' back in the 'struct saved_context'. However instead of having in the 'save_processor_state' and 'restore_processor_state' the store/load_gdt calls, we are only saving the GDT in the save_processor_state. For the restore path the lgdt operation is done in hibernate_asm_[32|64].S in the 'restore_registers' path. The apt reader of this description will recognize that only 64-bit kernels need this treatment, not 32-bit. This patch adds the logic in the 32-bit path to be more similar to 64-bit so that in the future the unification process can take advantage of this. [ hpa: this also reverts an inadvertent on-disk format change ] Suggested-by: N"H. Peter Anvin" <hpa@zytor.com> Acked-by: N"Rafael J. Wysocki" <rjw@sisk.pl> Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com> Link: http://lkml.kernel.org/r/1367459610-9656-2-git-send-email-konrad.wilk@oracle.comSigned-off-by: NH. Peter Anvin <hpa@linux.intel.com>
-
- 02 5月, 2013 18 次提交
-
-
由 Heiko Carstens 提交于
Commit 0c2c99b1 "memory hotplug: Allow memory blocks to span multiple memory sections" introduced a weak memory_block_size_bytes() function which can be used to set the size of a memory block as seen in sysfs. Provide an s390 specific override which makes sure that each memory block has at least a size of 256MB or the increment size of of a memory increment, whatever is larger. This way we can make sure that the number of memory sysfs objects doesn't explode for very large memory configurations. Reported-by: NGerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
-
由 Heiko Carstens 提交于
The current memory detection loop will detect all present memory of a machine. This is true even if the user specified the "mem=" parameter on the kernel command line. This can be a problem since the memory detection may cause a fully populated host page table for the guest, even for those parts of the memory that the guest will never use afterwards. So fix this and only detect memory up to a user supplied "mem=" limit if specified. Reported-by: NMichael Johanssen <johanssn@de.ibm.com> Reviewed-by: NMichael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
-
由 Heiko Carstens 提交于
When in kdump mode the kernel may access only the first couple of megabytes for execution, the rest contains the dump. However the size of the bitmap used by the bootmem allocator was calculated for the whole amount of memory of the machine. For very large machines this can lead to the situation that the kdump kernel will not come up because not enough memory is available. So fix this and calculate the size of the bitmap only for the piece of memory that the kdump kernel actually uses. Call reserve_oldmem() before setup_memory_end() so that the memory_chunk array already has been updated with respect to oldmem chunks. Afterwards setup_memory_end() will ignore those chunks. Reviewed-by: NMichael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
-
由 Heiko Carstens 提交于
The variable real_memory_size has odd semantics and has been used in a broken way by e.g. the old kvm code. Therefore get rid of it before anybody else makes use of it. Reviewed-by: NMichael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
-
由 Heiko Carstens 提交于
Add sanity check: verify if the passed in array resides in vmalloc space. If so print a warning and return to caller. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
-
由 Heiko Carstens 提交于
When disabling and enabling interrupts we must tell lockdep. So use local_irq_save()/restore() to disable and enable interrupts. The DAT disabling/enabling get handled separately now. Note: we may not call trace_hardirqs_on() with DAT disabled, since the generic code may access vmalloc'ed data structures. Reported-by: NMichael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
-
由 Heiko Carstens 提交于
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
-
由 Sebastian Ott 提交于
Use the 'ipldev' and 'condev' cio_ignore keywords to setup the command line for zfcpdump. Reviewed-by: NMichael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: NSebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
-
由 Heiko Carstens 提交于
Add "fallthrough" comments so nobody wonders if a break statement is missing. Reported-by: NJoe Perches <joe@perches.com> Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
-
由 Paul Mackerras 提交于
This adds the API for userspace to instantiate an XICS device in a VM and connect VCPUs to it. The API consists of a new device type for the KVM_CREATE_DEVICE ioctl, a new capability KVM_CAP_IRQ_XICS, which functions similarly to KVM_CAP_IRQ_MPIC, and the KVM_IRQ_LINE ioctl, which is used to assert and deassert interrupt inputs of the XICS. The XICS device has one attribute group, KVM_DEV_XICS_GRP_SOURCES. Each attribute within this group corresponds to the state of one interrupt source. The attribute number is the same as the interrupt source number. This does not support irq routing or irqfd yet. Signed-off-by: NPaul Mackerras <paulus@samba.org> Acked-by: NDavid Gibson <david@gibson.dropbear.id.au> Signed-off-by: NAlexander Graf <agraf@suse.de>
-
由 Wei Yongjun 提交于
Add the missing unlock before return from function set_base_addr() when disables the mapping. Introduced by commit 5df554ad (kvm/ppc/mpic: in-kernel MPIC emulation) Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: NAlexander Graf <agraf@suse.de>
-
由 Scott Wood 提交于
These functions do an srcu_dereference without acquiring the srcu lock themselves. Signed-off-by: NScott Wood <scottwood@freescale.com> Signed-off-by: NAlexander Graf <agraf@suse.de>
-
由 Scott Wood 提交于
This is an unused (no pun intended) leftover from when this code did reference counting. Signed-off-by: NScott Wood <scottwood@freescale.com> Signed-off-by: NAlexander Graf <agraf@suse.de>
-
由 Scott Wood 提交于
Keeping a linked list of statically defined objects doesn't work very well when we have multiple guests. :-P Switch to an array of constant objects. This fixes a hang when multiple guests are used. Signed-off-by: NScott Wood <scottwood@freescale.com> [agraf: remove struct list_head from mem_reg] Signed-off-by: NAlexander Graf <agraf@suse.de>
-
由 Dave Martin 提交于
The full mcpm layer is not likely to be relevant to v6 based platforms, so a multiplatform kernel won't use that code if booted on v6 hardware. This patch modifies the AFLAGS for affected mcpm .S files to specify armv7-a explicitly for that code. Signed-off-by: NDave Martin <dave.martin@linaro.org> Acked-by: NArnd Bergmann <arnd@arndb.de> Acked-by: NNicolas Pitre <nico@linaro.org> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
-
由 Aneesh Kumar K.V 提交于
We moved the definition of shift_to_mmu_psize and mmu_psize_to_shift out of hugetlbpage.c in patch "powerpc: New hugepage directory format". These functions are not related to hugetlbpage and we want to use them outside hugetlbpage.c We missed a definition for book3e when we moved these functions. Add similar functions to mmu-book3e.h Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
-
由 Michael Ellerman 提交于
This context switches the new Event Based Branching (EBB) SPRs. The three new SPRs are: - Event Based Branch Handler Register (EBBHR) - Event Based Branch Return Register (EBBRR) - Branch Event Status and Control Register (BESCR) Signed-off-by: NMichael Ellerman <michael@ellerman.id.au> Signed-off-by: NMatt Evans <matt@ozlabs.org> Signed-off-by: NMichael Neuling <mikey@neuling.org> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
-
由 Michael Neuling 提交于
This turns Event Based Branching (EBB) on in the Hypervisor Facility Status and Control Register (HFSCR) and Facility Status and Control Register (FSCR). Signed-off-by: NMichael Neuling <mikey@neuling.org> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
-