- 20 9月, 2012 3 次提交
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由 Gleb Natapov 提交于
Most interrupt are delivered to only one vcpu. Use pre-build tables to find interrupt destination instead of looping through all vcpus. In case of logical mode loop only through vcpus in a logical cluster irq is sent to. Signed-off-by: NGleb Natapov <gleb@redhat.com> Acked-by: NMichael S. Tsirkin <mst@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Avi Kivity 提交于
Instead of branchy code depending on level, gpte.ps, and mmu configuration, prepare everything in a bitmap during mode changes and look it up during runtime. Reviewed-by: NXiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Avi Kivity 提交于
walk_addr_generic() permission checks are a maze of branchy code, which is performed four times per lookup. It depends on the type of access, efer.nxe, cr0.wp, cr4.smep, and in the near future, cr4.smap. Optimize this away by precalculating all variants and storing them in a bitmap. The bitmap is recalculated when rarely-changing variables change (cr0, cr4) and is indexed by the often-changing variables (page fault error code, pte access permissions). The permission check is moved to the end of the loop, otherwise an SMEP fault could be reported as a false positive, when PDE.U=1 but PTE.U=0. Noted by Xiao Guangrong. The result is short, branch-free code. Reviewed-by: NXiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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- 06 9月, 2012 3 次提交
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由 Gleb Natapov 提交于
Optimize "rep ins" by allowing emulator to write back more than one datum at a time. Introduce new operand type OP_MEM_STR which tells writeback() that dst contains pointer to an array that should be written back as opposite to just one data element. Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Gleb Natapov 提交于
Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Gleb Natapov 提交于
Current code assumes that IO exit was due to instruction emulation and handles execution back to emulator directly. This patch adds new userspace IO exit completion callback that can be set by any other code that caused IO exit to userspace. Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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- 05 9月, 2012 1 次提交
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由 Mathias Krause 提交于
We never change emulate_ops[] at runtime so it should be r/o. Signed-off-by: NMathias Krause <minipli@googlemail.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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- 28 8月, 2012 1 次提交
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由 Avi Kivity 提交于
Instead of populating the entire register file, read in registers as they are accessed, and write back only the modified ones. This saves a VMREAD and VMWRITE on Intel (for rsp, since it is not usually used during emulation), and a two 128-byte copies for the registers. Signed-off-by: NAvi Kivity <avi@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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- 23 8月, 2012 1 次提交
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由 Marcelo Tosatti 提交于
The distinction between CONFIG_KVM_CLOCK and CONFIG_KVM_GUEST is not so clear anymore, as demonstrated by recent bugs caused by poor handling of on/off combinations of these options. Merge CONFIG_KVM_CLOCK into CONFIG_KVM_GUEST. Reported-By: NOGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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- 22 8月, 2012 2 次提交
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由 Xiao Guangrong 提交于
In current code, if we map a readonly memory space from host to guest and the page is not currently mapped in the host, we will get a fault pfn and async is not allowed, then the vm will crash We introduce readonly memory region to map ROM/ROMD to the guest, read access is happy for readonly memslot, write access on readonly memslot will cause KVM_EXIT_MMIO exit Signed-off-by: NXiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Richard Weinberger 提交于
This comment is no longer true. We support up to 2^16 CPUs because __ticket_t is an u16 if NR_CPUS is larger than 256. Signed-off-by: NRichard Weinberger <richard@nod.at> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NIngo Molnar <mingo@kernel.org>
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- 14 8月, 2012 2 次提交
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由 Raghavendra K T 提交于
Signed-off-by: NRaghavendra K T <raghavendra.kt@linux.vnet.ibm.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Marcelo Tosatti 提交于
kvm_guest_time_update unconditionally clears hv_clock.flags field, so the notification never reaches the guest. Fix it by allowing PVCLOCK_GUEST_STOPPED to passthrough. Reviewed-by: NEric B Munson <emunson@mgebm.net> Reviewed-by: NAmit Shah <amit.shah@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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- 06 8月, 2012 1 次提交
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由 Takuya Yoshikawa 提交于
Two reasons: - x86 can integrate rmap and rmap_pde and remove heuristics in __gfn_to_rmap(). - Some architectures do not need rmap. Since rmap is one of the most memory consuming stuff in KVM, ppc'd better restrict the allocation to Book3S HV. Signed-off-by: NTakuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Acked-by: NPaul Mackerras <paulus@samba.org> Signed-off-by: NAvi Kivity <avi@redhat.com>
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- 01 8月, 2012 3 次提交
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由 Andres Salomon 提交于
This uses the new EC driver framework in drivers/platform/olpc. The XO-1 and XO-1.5-specific code is still in arch/x86, but the generic stuff (including a new workqueue; no more running EC commands with IRQs disabled!) can be shared with other architectures. Signed-off-by: NAndres Salomon <dilinger@queued.net> Acked-by: NPaul Fox <pgf@laptop.org> Reviewed-by: NThomas Gleixner <tglx@linutronix.de>
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由 Andres Salomon 提交于
Switch over to using olpc-ec.h in multiple steps, so as not to break builds. This covers every driver that calls olpc_ec_cmd(). Signed-off-by: NAndres Salomon <dilinger@queued.net> Acked-by: NPaul Fox <pgf@laptop.org> Reviewed-by: NThomas Gleixner <tglx@linutronix.de>
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由 Andres Salomon 提交于
The OLPC EC driver has outgrown arch/x86/platform/. It's time to both share common code amongst different architectures, as well as move it out of arch/x86/. The XO-1.75 is ARM-based, and the EC driver shares a lot of code with the x86 code. Signed-off-by: NAndres Salomon <dilinger@queued.net> Acked-by: NPaul Fox <pgf@laptop.org> Reviewed-by: NThomas Gleixner <tglx@linutronix.de>
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- 31 7月, 2012 2 次提交
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由 Peter Zijlstra 提交于
Some PMUs don't provide a full register set for their sample, specifically 'advanced' PMUs like AMD IBS and Intel PEBS which provide 'better' than regular interrupt accuracy. In this case we use the interrupt regs as basis and over-write some fields (typically IP) with different information. The perf core however uses user_mode() to distinguish user/kernel samples, user_mode() relies on regs->cs. If the interrupt skid pushed us over a boundary the new IP might not be in the same domain as the interrupt. Commit ce5c1fe9 ("perf/x86: Fix USER/KERNEL tagging of samples") tried to fix this by making the perf core use kernel_ip(). This however is wrong (TM), as pointed out by Linus, since it doesn't allow for VM86 and non-zero based segments in IA32 mode. Therefore, provide a new helper to set the regs->ip field, set_linear_ip(), which massages the regs into a suitable state assuming the provided IP is in fact a linear address. Also modify perf_instruction_pointer() and perf_callchain_user() to deal with segments base offsets. Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1341910954.3462.102.camel@twinsSigned-off-by: NIngo Molnar <mingo@kernel.org>
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由 Will Deacon 提交于
Rather than #define the options manually in the architecture code, add Kconfig options for them and select them there instead. This also allows us to select the compat IPC version parsing automatically for platforms using the old compat IPC interface. Reported-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NWill Deacon <will.deacon@arm.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Chris Metcalf <cmetcalf@tilera.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 26 7月, 2012 2 次提交
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由 Tony Luck 提交于
We will need some of these values in mce.c. Move them to the appropriate header file so they are available. Acked-by: NBorislav Petkov <bp@amd64.org> Signed-off-by: NTony Luck <tony.luck@intel.com> Cc: Chen Gong <gong.chen@linux.intel.com> Cc: Huang Ying <ying.huang@intel.com> Cc: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Link: http://lkml.kernel.org/r/0ccfb1af5fe35e537b7cd8e4d448bf7d851dbfb9.1343078495.git.tony.luck@intel.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
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由 Jovi Zhang 提交于
When CONFIG_PERF_EVENTS disabled, there will have a compiliation error, because missing struct before structure name. Signed-off-by: NJovi Zhang <bookjovi@gmail.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Jiri Kosina <trivial@kernel.org> Link: http://lkml.kernel.org/r/CACV3sbKF%3DCX%2B2jWEWesfCA6rBoQ3wDM4-5ac9MuBtVbCtMRHdQ@mail.gmail.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
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- 21 7月, 2012 4 次提交
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由 Matt Fleming 提交于
As things currently stand, traditional EFI boot loaders and the EFI boot stub are carrying essentially the same initialisation code required to setup an EFI machine for booting a kernel. There's really no need to have this code in two places and the hope is that, with this new protocol, initialisation and booting of the kernel can be left solely to the kernel's EFI boot stub. The responsibilities of the boot loader then become, o Loading the kernel image from boot media File system code still needs to be carried by boot loaders for the scenario where the kernel and initrd files reside on a file system that the EFI firmware doesn't natively understand, such as ext4, etc. o Providing a user interface Boot loaders still need to display any menus/interfaces, for example to allow the user to select from a list of kernels. Bump the boot protocol number because we added the 'handover_offset' field to indicate the location of the handover protocol entry point. Cc: H. Peter Anvin <hpa@zytor.com> Cc: Peter Jones <pjones@redhat.com> Cc: Ingo Molnar <mingo@kernel.org> Signed-off-by: NMatt Fleming <matt.fleming@intel.com> Acked-and-Tested-by: NMatthew Garrett <mjg@redhat.com> Link: http://lkml.kernel.org/r/1342689828-16815-1-git-send-email-matt@console-pimps.orgSigned-off-by: NH. Peter Anvin <hpa@zytor.com>
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由 Alex Shi 提交于
The incompatible parameter of flush_tlb_mm_range cause build warning. Fix it by correct parameter. Ingo Molnar found that this could also cause a user space crash. Reported-by: NTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Reported-by: NIngo Molnar <mingo@kernel.org> Signed-off-by: NAlex Shi <alex.shi@intel.com> Link: http://lkml.kernel.org/r/1342747103-19765-1-git-send-email-alex.shi@intel.comSigned-off-by: NH. Peter Anvin <hpa@zytor.com>
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由 H. Peter Anvin 提交于
Add the RDSEED and ADX features documented in section 9.1 of the Intel Architecture Instruction Set Extensions Programming Reference, document 319433, version 013b, available from http://software.intel.com/en-us/avx/ The PREFETCHW bit is already supported in Linux under the name 3DNOWPREFETCH. Signed-off-by: NH. Peter Anvin <hpa@linux.intel.com> Link: http://lkml.kernel.org/n/tip-lgr6482ufk1bvxzvc2hr8qbp@git.kernel.org
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由 Michael S. Tsirkin 提交于
When more than 1 source id is in use for the same GSI, we have the following race related to handling irq_states race: CPU 0 clears bit 0. CPU 0 read irq_state as 0. CPU 1 sets level to 1. CPU 1 calls kvm_ioapic_set_irq(1). CPU 0 calls kvm_ioapic_set_irq(0). Now ioapic thinks the level is 0 but irq_state is not 0. Fix by performing all irq_states bitmap handling under pic/ioapic lock. This also removes the need for atomics with irq_states handling. Reported-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NMichael S. Tsirkin <mst@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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- 20 7月, 2012 1 次提交
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由 Liu, Jinsong 提交于
When MCA error occurs, it would be handled by Xen hypervisor first, and then the error information would be sent to initial domain for logging. This patch gets error information from Xen hypervisor and convert Xen format error into Linux format mcelog. This logic is basically self-contained, not touching other kernel components. By using tools like mcelog tool users could read specific error information, like what they did under native Linux. To test follow directions outlined in Documentation/acpi/apei/einj.txt Acked-and-tested-by: NBorislav Petkov <borislav.petkov@amd.com> Signed-off-by: NKe, Liping <liping.ke@intel.com> Signed-off-by: NJiang, Yunhong <yunhong.jiang@intel.com> Signed-off-by: NJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: NLiu, Jinsong <jinsong.liu@intel.com> Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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- 19 7月, 2012 2 次提交
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由 Takuya Yoshikawa 提交于
This makes it possible to loop over rmap_pde arrays in the same way as we do over rmap so that we can optimize kvm_handle_hva_range() easily in the following patch. Signed-off-by: NTakuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Takuya Yoshikawa 提交于
When we tested KVM under memory pressure, with THP enabled on the host, we noticed that MMU notifier took a long time to invalidate huge pages. Since the invalidation was done with mmu_lock held, it not only wasted the CPU but also made the host harder to respond. This patch mitigates this by using kvm_handle_hva_range(). Signed-off-by: NTakuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Cc: Alexander Graf <agraf@suse.de> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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- 16 7月, 2012 2 次提交
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由 Michael S. Tsirkin 提交于
This reverts commit f9808b7f. After commit 'kvm: switch to apic_set_eoi_write, apic_write' the stubs are no longer needed as kvm does not look at apicdrivers anymore. Signed-off-by: NMichael S. Tsirkin <mst@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Michael S. Tsirkin 提交于
KVM PV EOI optimization overrides eoi_write apic op with its own version. Add an API for this to avoid meddling with core x86 apic driver data structures directly. For KVM use, we don't need any guarantees about when the switch to the new op will take place, so it could in theory use this API after SMP init, but it currently doesn't, and restricting callers to early init makes it clear that it's safe as it won't race with actual APIC driver use. Signed-off-by: NMichael S. Tsirkin <mst@redhat.com> Acked-by: NIngo Molnar <mingo@kernel.org> Signed-off-by: NAvi Kivity <avi@redhat.com>
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- 12 7月, 2012 2 次提交
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由 Mao, Junjie 提交于
This patch handles PCID/INVPCID for guests. Process-context identifiers (PCIDs) are a facility by which a logical processor may cache information for multiple linear-address spaces so that the processor may retain cached information when software switches to a different linear address space. Refer to section 4.10.1 in IA32 Intel Software Developer's Manual Volume 3A for details. For guests with EPT, the PCID feature is enabled and INVPCID behaves as running natively. For guests without EPT, the PCID feature is disabled and INVPCID triggers #UD. Signed-off-by: NJunjie Mao <junjie.mao@intel.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Prarit Bhargava 提交于
While debugging I noticed that unlike all the other hypervisor code in the kernel, kvm does not have an entry for x86_hyper which is used in detect_hypervisor_platform() which results in a nice printk in the syslog. This is only really a stub function but it does make kvm more consistent with the other hypervisors. Signed-off-by: NPrarit Bhargava <prarit@redhat.com> Cc: Avi Kivity <avi@redhat.com> Cc: Gleb Natapov <gleb@redhat.com> Cc: Alex Williamson <alex.williamson@redhat.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Marcelo Tostatti <mtosatti@redhat.com> Cc: kvm@vger.kernel.org Signed-off-by: NAvi Kivity <avi@redhat.com>
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- 09 7月, 2012 2 次提交
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由 Avi Kivity 提交于
memop is not initialized; this can lead to a two-byte operation following a 4-byte operation to see garbage values. Usually truncation fixes things fot us later on, but at least in one case (call abs) it doesn't. Fix by moving memop to the auto-initialized field area. Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Avi Kivity 提交于
Instead of getting an exact leaf, follow the spec and fall back to the last main leaf instead. This lets us easily emulate the cpuid instruction in the emulator. Signed-off-by: NAvi Kivity <avi@redhat.com>
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- 06 7月, 2012 5 次提交
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由 Suresh Siddha 提交于
For the x2apic cluster mode, vector for an interrupt is currently reserved on all the cpu's that are part of the x2apic cluster. But the interrupts will be routed only to the cluster (derived from the first cpu in the mask) members specified in the mask. So there is no need to reserve the vector in the unused cluster members. Modify __assign_irq_vector() to reserve the vectors based on the user specified irq destination mask. If the new mask is a proper subset of the currently used mask, cleanup the vector allocation on the unused cpu members. Also, allow the apic driver to tune the vector domain based on the affinity mask (which in most cases is the user-specified mask). Signed-off-by: NSuresh Siddha <suresh.b.siddha@intel.com> Acked-by: NYinghai Lu <yinghai@kernel.org> Acked-by: NAlexander Gordeev <agordeev@redhat.com> Acked-by: NCyrill Gorcunov <gorcunov@openvz.org> Link: http://lkml.kernel.org/r/1340656709-11423-3-git-send-email-suresh.b.siddha@intel.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
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由 Suresh Siddha 提交于
Currently __assign_irq_vector() goes through each cpu in the specified mask until it finds a free vector in all the cpu's that are part of the same interrupt domain. We visit all the interrupt domain sibling cpus to reserve the free vector. So, when we fail to find a free vector in an interrupt domain, it is safe to continue our search with a cpu belonging to a new interrupt domain. No need to go through each cpu, if the domain containing that cpu is already visited. Use the irq_cfg's old_domain to track the visited domains and optimize the cpu traversal while finding a free vector in the given cpumask. NOTE: We can also optimize the search by using for_each_cpu() and skip the current cpu, if it is not the first cpu in the mask returned by the vector_allocation_domain(). But re-using the cfg->old_domain to track the visited domains will be slightly faster. Signed-off-by: NSuresh Siddha <suresh.b.siddha@intel.com> Acked-by: NYinghai Lu <yinghai@kernel.org> Acked-by: NAlexander Gordeev <agordeev@redhat.com> Acked-by: NCyrill Gorcunov <gorcunov@openvz.org> Link: http://lkml.kernel.org/r/1340656709-11423-2-git-send-email-suresh.b.siddha@intel.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
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由 Peter Zijlstra 提交于
Recent Intel microcode resolved the SNB-PEBS issues, so conditionally enable PEBS on SNB hardware depending on the microcode revision. Thanks to Stephane for figuring out the various microcode revisions. Suggested-by: NStephane Eranian <eranian@google.com> Acked-by: NBorislav Petkov <borislav.petkov@amd.com> Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/n/tip-v3672ziwh9damwqwh1uz3krm@git.kernel.orgSigned-off-by: NIngo Molnar <mingo@kernel.org>
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由 Robert Richter 提交于
There is no need for keeping separate pmu structs. We can enable amd_{get,put}_event_constraints() functions also for family 15h event. The advantage is that there is only a single pmu struct for all AMD cpus. This patch introduces functions to setup the pmu to enabe core performance counters or counter constraints. Also, cpuid checks are used instead of family checks where possible. Thus, it enables the code independently of cpu families if the feature flag is set. Signed-off-by: NRobert Richter <robert.richter@amd.com> Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1340217996-2254-4-git-send-email-robert.richter@amd.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
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由 Robert Richter 提交于
There are macros that are Intel specific and not x86 generic. Rename them into INTEL_*. This patch removes X86_PMC_IDX_GENERIC and does: $ sed -i -e 's/X86_PMC_MAX_/INTEL_PMC_MAX_/g' \ arch/x86/include/asm/kvm_host.h \ arch/x86/include/asm/perf_event.h \ arch/x86/kernel/cpu/perf_event.c \ arch/x86/kernel/cpu/perf_event_p4.c \ arch/x86/kvm/pmu.c $ sed -i -e 's/X86_PMC_IDX_FIXED/INTEL_PMC_IDX_FIXED/g' \ arch/x86/include/asm/perf_event.h \ arch/x86/kernel/cpu/perf_event.c \ arch/x86/kernel/cpu/perf_event_intel.c \ arch/x86/kernel/cpu/perf_event_intel_ds.c \ arch/x86/kvm/pmu.c $ sed -i -e 's/X86_PMC_MSK_/INTEL_PMC_MSK_/g' \ arch/x86/include/asm/perf_event.h \ arch/x86/kernel/cpu/perf_event.c Signed-off-by: NRobert Richter <robert.richter@amd.com> Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1340217996-2254-2-git-send-email-robert.richter@amd.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
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- 04 7月, 2012 1 次提交
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由 Michael S. Tsirkin 提交于
On UP i386, when APIC is disabled # CONFIG_X86_UP_APIC is not set # CONFIG_PCI_IOAPIC is not set code looking at apicdrivers never has any effect but it still gets compiled in. In particular, this causes build failures with kvm, but it generally bloats the kernel unnecessarily. Fix by defining both __apicdrivers and __apicdrivers_end to be NULL when CONFIG_X86_LOCAL_APIC is unset: I verified that as the result any loop scanning __apicdrivers gets optimized out by the compiler. Warning: a .config with apic disabled doesn't seem to boot for me (even without this patch). Still verifying why, meanwhile this patch is compile-tested only. Signed-off-by: NMichael S. Tsirkin <mst@redhat.com> Reported-by: NRandy Dunlap <rdunlap@xenotime.net> Acked-by: NRandy Dunlap <rdunlap@xenotime.net> Acked-by: NH. Peter Anvin <hpa@linux.intel.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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