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path: root/arch/x86/kvm/mmu_audit.c
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2014-08-08arch/x86: replace strict_strto callsDaniel Walter
Replace obsolete strict_strto calls with appropriate kstrto calls Signed-off-by: Daniel Walter <dwalter@google.com> Acked-by: Borislav Petkov <bp@suse.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-11-20kvm: mmu: delay mmu audit activationSasha Levin
We should not be using jump labels before they were initialized. Push back the callback to until after jump label initialization. Signed-off-by: Sasha Levin <sasha.levin@oracle.com> Signed-off-by: Gleb Natapov <gleb@redhat.com>
2012-08-06KVM: do not release the error pfnXiao Guangrong
After commit a2766325cf9f9, the error pfn is replaced by the error code, it need not be released anymore [ The patch has been compiling tested for powerpc ] Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2012-08-06KVM: MMU: Use gfn_to_rmap() instead of directly reading rmap arrayTakuya Yoshikawa
This helps to make rmap architecture specific in a later patch. Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Avi Kivity <avi@redhat.com>
2012-04-08KVM: MMU: Improve iteration through sptes from rmapTakuya Yoshikawa
Iteration using rmap_next(), the actual body is pte_list_next(), is inefficient: every time we call it we start from checking whether rmap holds a single spte or points to a descriptor which links more sptes. In the case of shadow paging, this quadratic total iteration cost is a problem. Even for two dimensional paging, with EPT/NPT on, in which we almost always have a single mapping, the extra checks at the end of the iteration should be eliminated. This patch fixes this by introducing rmap_iterator which keeps the iteration context for the next search. Furthermore the implementation of rmap_next() is splitted into two functions, rmap_get_first() and rmap_get_next(), to avoid repeatedly checking whether the rmap being iterated on has only one spte. Although there seemed to be only a slight change for EPT/NPT, the actual improvement was significant: we observed that GET_DIRTY_LOG for 1GB dirty memory became 15% faster than before. This is probably because the new code is easy to make branch predictions. Note: we just remove pte_list_next() because we can think of parent_ptes as a reverse mapping. Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Avi Kivity <avi@redhat.com>
2012-03-28Merge branch 'kvm-updates/3.4' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
Pull kvm updates from Avi Kivity: "Changes include timekeeping improvements, support for assigning host PCI devices that share interrupt lines, s390 user-controlled guests, a large ppc update, and random fixes." This is with the sign-off's fixed, hopefully next merge window we won't have rebased commits. * 'kvm-updates/3.4' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (130 commits) KVM: Convert intx_mask_lock to spin lock KVM: x86: fix kvm_write_tsc() TSC matching thinko x86: kvmclock: abstract save/restore sched_clock_state KVM: nVMX: Fix erroneous exception bitmap check KVM: Ignore the writes to MSR_K7_HWCR(3) KVM: MMU: make use of ->root_level in reset_rsvds_bits_mask KVM: PMU: add proper support for fixed counter 2 KVM: PMU: Fix raw event check KVM: PMU: warn when pin control is set in eventsel msr KVM: VMX: Fix delayed load of shared MSRs KVM: use correct tlbs dirty type in cmpxchg KVM: Allow host IRQ sharing for assigned PCI 2.3 devices KVM: Ensure all vcpus are consistent with in-kernel irqchip settings KVM: x86 emulator: Allow PM/VM86 switch during task switch KVM: SVM: Fix CPL updates KVM: x86 emulator: VM86 segments must have DPL 3 KVM: x86 emulator: Fix task switch privilege checks arch/powerpc/kvm/book3s_hv.c: included linux/sched.h twice KVM: x86 emulator: correctly mask pmc index bits in RDPMC instruction emulation KVM: mmu_notifier: Flush TLBs before releasing mmu_lock ...
2012-03-05KVM: MMU: Remove unused kvm parameter from rmap_next()Takuya Yoshikawa
Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2012-02-24static keys: Introduce 'struct static_key', static_key_true()/false() and ↵Ingo Molnar
static_key_slow_[inc|dec]() So here's a boot tested patch on top of Jason's series that does all the cleanups I talked about and turns jump labels into a more intuitive to use facility. It should also address the various misconceptions and confusions that surround jump labels. Typical usage scenarios: #include <linux/static_key.h> struct static_key key = STATIC_KEY_INIT_TRUE; if (static_key_false(&key)) do unlikely code else do likely code Or: if (static_key_true(&key)) do likely code else do unlikely code The static key is modified via: static_key_slow_inc(&key); ... static_key_slow_dec(&key); The 'slow' prefix makes it abundantly clear that this is an expensive operation. I've updated all in-kernel code to use this everywhere. Note that I (intentionally) have not pushed through the rename blindly through to the lowest levels: the actual jump-label patching arch facility should be named like that, so we want to decouple jump labels from the static-key facility a bit. On non-jump-label enabled architectures static keys default to likely()/unlikely() branches. Signed-off-by: Ingo Molnar <mingo@elte.hu> Acked-by: Jason Baron <jbaron@redhat.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> Cc: a.p.zijlstra@chello.nl Cc: mathieu.desnoyers@efficios.com Cc: davem@davemloft.net Cc: ddaney.cavm@gmail.com Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/20120222085809.GA26397@elte.hu Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-12-27KVM: MMU: audit: inline audit functionXiao Guangrong
inline audit function and little cleanup Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-12-27KVM: MMU: audit: replace mmu audit tracepoint with jump-labelXiao Guangrong
The tracepoint is only used to audit mmu code, it should not be exposed to user, let us replace it with jump-label. Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-09-25KVM: Clean up and extend rate-limited outputJan Kiszka
The use of printk_ratelimit is discouraged, replace it with pr*_ratelimited or __ratelimit. While at it, convert remaining guest-triggerable printks to rate-limited variants. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-24KVM: MMU: remove bypass_guest_pfXiao Guangrong
The idea is from Avi: | Maybe it's time to kill off bypass_guest_pf=1. It's not as effective as | it used to be, since unsync pages always use shadow_trap_nonpresent_pte, | and since we convert between the two nonpresent_ptes during sync and unsync. Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-01-12KVM: MMU: audit: allow audit more guests at the same timeXiao Guangrong
It only allows to audit one guest in the system since: - 'audit_point' is a glob variable - mmu_audit_disable() is called in kvm_mmu_destroy(), so audit is disabled after a guest exited this patch fix those issues then allow to audit more guests at the same time Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: fix typo in copyright noticeNicolas Kaiser
Fix typo in copyright notice. Signed-off-by: Nicolas Kaiser <nikai@nikai.net> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: MMU: audit: check whether have unsync sps after root syncXiao Guangrong
After root synced, all unsync sps are synced, this patch add a check to make sure it's no unsync sps in VCPU's page table Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: MMU: audit: introduce audit_printk to cleanup audit codeXiao Guangrong
Introduce audit_printk, and record audit point instead audit name Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: MMU: audit: fix vcpu's spte walkingXiao Guangrong
After nested nested paging, it may using long mode to shadow 32/PAE paging guest, so this patch fix it Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: MMU: lower the aduit frequencyXiao Guangrong
The audit is very high overhead, so we need lower the frequency to assure the guest is running. Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: MMU: improve spte auditXiao Guangrong
Both audit_mappings() and audit_sptes_have_rmaps() need to walk vcpu's page table, so we can do these checking in a spte walking Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: MMU: improve active sp auditXiao Guangrong
Both audit_rmap() and audit_write_protection() need to walk all active sp, so we can do these checking in a sp walking Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: MMU: move audit to a separate fileXiao Guangrong
Move the audit code from arch/x86/kvm/mmu.c to arch/x86/kvm/mmu_audit.c Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>