- 10 11月, 2015 7 次提交
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由 Haozhong Zhang 提交于
Both VMX and SVM calculate the tsc-offset in the same way, so this patch removes the call-back compute_tsc_offset() and replaces it with a common function kvm_compute_tsc_offset(). Signed-off-by: NHaozhong Zhang <haozhong.zhang@intel.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 Haozhong Zhang 提交于
Both VMX and SVM propagate virtual_tsc_khz in the same way, so this patch removes the call-back set_tsc_khz() and replaces it with a common function. Signed-off-by: NHaozhong Zhang <haozhong.zhang@intel.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 Haozhong Zhang 提交于
VMX and SVM calculate the TSC scaling ratio in a similar logic, so this patch generalizes it to a common TSC scaling function. Signed-off-by: NHaozhong Zhang <haozhong.zhang@intel.com> [Inline the multiplication and shift steps into mul_u64_u64_shr. Remove BUG_ON. - Paolo] Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 Haozhong Zhang 提交于
This patch moves the field of TSC scaling ratio from the architecture struct vcpu_svm to the common struct kvm_vcpu_arch. Signed-off-by: NHaozhong Zhang <haozhong.zhang@intel.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 Haozhong Zhang 提交于
The number of bits of the fractional part of the 64-bit TSC scaling ratio in VMX and SVM is different. This patch makes the architecture code to collect the number of fractional bits and other related information into variables that can be accessed in the common code. Signed-off-by: NHaozhong Zhang <haozhong.zhang@intel.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 Paolo Bonzini 提交于
These include module parameters and variables that are set by kvm_x86_ops->hardware_setup. Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 Paolo Bonzini 提交于
They are exactly the same, except that handle_mmio_page_fault has an unused argument and a call to WARN_ON. Remove the unused argument from the callers, and move the warning to (the former) handle_mmio_page_fault_common. Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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- 05 11月, 2015 1 次提交
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由 Kai Huang 提交于
I found PML was broken since below commit: commit feda805f Author: Xiao Guangrong <guangrong.xiao@linux.intel.com> Date: Wed Sep 9 14:05:55 2015 +0800 KVM: VMX: unify SECONDARY_VM_EXEC_CONTROL update Unify the update in vmx_cpuid_update() Signed-off-by: NXiao Guangrong <guangrong.xiao@linux.intel.com> [Rewrite to use vmcs_set_secondary_exec_control. - Paolo] Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com> The reason is in above commit vmx_cpuid_update calls vmx_secondary_exec_control, in which currently SECONDARY_EXEC_ENABLE_PML bit is cleared unconditionally (as PML is enabled in creating vcpu). Therefore if vcpu_cpuid_update is called after vcpu is created, PML will be disabled unexpectedly while log-dirty code still thinks PML is used. Fix this by clearing SECONDARY_EXEC_ENABLE_PML in vmx_secondary_exec_control only when PML is not supported or not enabled (!enable_pml). This is more reasonable as PML is currently either always enabled or disabled. With this explicit updating SECONDARY_EXEC_ENABLE_PML in vmx_enable{disable}_pml is not needed so also rename vmx_enable{disable}_pml to vmx_create{destroy}_pml_buffer. Fixes: feda805fSigned-off-by: NKai Huang <kai.huang@linux.intel.com> [While at it, change a wrong ASSERT to an "if". The condition can happen if creating the VCPU fails with ENOMEM. - Paolo] Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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- 04 11月, 2015 16 次提交
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由 Laszlo Ersek 提交于
Commit b18d5431 ("KVM: x86: fix CR0.CD virtualization") was technically correct, but it broke OVMF guests by slowing down various parts of the firmware. Commit fb279950 ("KVM: vmx: obey KVM_QUIRK_CD_NW_CLEARED") quirked the first function modified by b18d5431, vmx_get_mt_mask(), for OVMF's sake. This restored the speed of the OVMF code that runs before PlatformPei (including the memory intensive LZMA decompression in SEC). This patch extends the quirk to the second function modified by b18d5431, kvm_set_cr0(). It eliminates the intrusive slowdown that hits the EFI_MP_SERVICES_PROTOCOL implementation of edk2's UefiCpuPkg/CpuDxe -- which is built into OVMF --, when CpuDxe starts up all APs at once for initialization, in order to count them. We also carry over the kvm_arch_has_noncoherent_dma() sub-condition from the other half of the original commit b18d5431. Fixes: b18d5431 Cc: stable@vger.kernel.org Cc: Jordan Justen <jordan.l.justen@intel.com> Cc: Alex Williamson <alex.williamson@redhat.com> Reviewed-by: NXiao Guangrong <guangrong.xiao@linux.intel.com> Tested-by: NJanusz Mocek <januszmk6@gmail.com> Signed-off-by: Laszlo Ersek <lersek@redhat.com># Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 Paolo Bonzini 提交于
The SDM says that exiting system management mode from 64-bit mode is invalid, but that would be too good to be true. But actually, most of the code is already there to support exiting from compat mode (EFER.LME=1, EFER.LMA=0). Getting all the way from 64-bit mode to real mode only requires clearing CS.L and CR4.PCIDE. Cc: stable@vger.kernel.org Fixes: 660a5d51Tested-by: NLaszlo Ersek <lersek@redhat.com> Cc: Radim Krčmář <rkrcmar@redhat.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 Radim Krčmář 提交于
The comment in code had it mostly right, but we enable paging for emulated real mode regardless of EPT. Without EPT (which implies emulated real mode), secondary VCPUs won't start unless we disable SM[AE]P when the guest doesn't use paging. Signed-off-by: NRadim Krčmář <rkrcmar@redhat.com> Cc: stable@vger.kernel.org Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 Paolo Bonzini 提交于
The function is not used outside device assignment, and kvm_arch_set_irq_inatomic has a different prototype. Move it here and make it static to avoid confusion. Reviewed-by: NRadim Krčmář <rkrcmar@redhat.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 Paolo Bonzini 提交于
The symbols are always defined. Reviewed-by: NRadim Krčmář <rkrcmar@redhat.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 Paolo Bonzini 提交于
We do not want to do too much work in atomic context, in particular not walking all the VCPUs of the virtual machine. So we want to distinguish the architecture-specific injection function for irqfd from kvm_set_msi. Since it's still empty, reuse the newly added kvm_arch_set_irq and rename it to kvm_arch_set_irq_inatomic. Reviewed-by: NRadim Krčmář <rkrcmar@redhat.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 Radim Krčmář 提交于
BSP doesn't get INIT so its apic_arb_prio isn't zeroed after reboot. BSP won't get lowest priority interrupts until other VCPUs get enough interrupts to match their pre-reboot apic_arb_prio. That behavior doesn't fit into KVM's round-robin-like interpretation of lowest priority delivery ... userspace should KVM_SET_LAPIC on reset, so just zero apic_arb_prio there. Reported-by: NYuki Shibuya <shibuya.yk@ncos.nec.co.jp> Signed-off-by: NRadim Krčmář <rkrcmar@redhat.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 Andrey Smetanin 提交于
Moved Hyper-V synic contants from guest Hyper-V drivers private header into x86 arch uapi Hyper-V header. Added Hyper-V synic msr's flags into x86 arch uapi Hyper-V header. Signed-off-by: NAndrey Smetanin <asmetanin@virtuozzo.com> Reviewed-by: NRoman Kagan <rkagan@virtuozzo.com> Signed-off-by: NDenis V. Lunev <den@openvz.org> CC: Vitaly Kuznetsov <vkuznets@redhat.com> CC: "K. Y. Srinivasan" <kys@microsoft.com> CC: Gleb Natapov <gleb@kernel.org> CC: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 Radim Krčmář 提交于
GET_SMSTATE depends on real mode to ensure that smbase+offset is treated as a physical address, which has already caused a bug after shuffling the code. Enforce physical addressing. Signed-off-by: NRadim Krčmář <rkrcmar@redhat.com> Reported-by: NLaszlo Ersek <lersek@redhat.com> Tested-by: NLaszlo Ersek <lersek@redhat.com> Cc: stable@vger.kernel.org Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 Radim Krčmář 提交于
We want to read the physical memory when emulating RSM. X86EMUL_IO_NEEDED is returned on all errors for consistency with other helpers. Signed-off-by: NRadim Krčmář <rkrcmar@redhat.com> Tested-by: NLaszlo Ersek <lersek@redhat.com> Cc: stable@vger.kernel.org Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 Saurabh Sengar 提交于
removing unused variables, found by coccinelle Signed-off-by: NSaurabh Sengar <saurabh.truth@gmail.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 Jan Beulich 提交于
The symbol was missing a KVM dependency. Signed-off-by: NJan Beulich <jbeulich@suse.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 Paolo Bonzini 提交于
Merge tag 'kvm-arm-for-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD KVM/ARM Changes for v4.4-rc1 Includes a number of fixes for the arch-timer, introducing proper level-triggered semantics for the arch-timers, a series of patches to synchronously halt a guest (prerequisite for IRQ forwarding), some tracepoint improvements, a tweak for the EL2 panic handlers, some more VGIC cleanups getting rid of redundant state, and finally a stylistic change that gets rid of some ctags warnings. Conflicts: arch/x86/include/asm/kvm_host.h
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由 Pavel Fedin 提交于
Now we see that vgic_set_lr() and vgic_sync_lr_elrsr() are always used together. Merge them into one function, saving from second vgic_ops dereferencing every time. Signed-off-by: NPavel Fedin <p.fedin@samsung.com> Signed-off-by: NChristoffer Dall <christoffer.dall@linaro.org>
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由 Pavel Fedin 提交于
1. Remove unnecessary 'irq' argument, because irq number can be retrieved from the LR. 2. Since cff9211e ("arm/arm64: KVM: Fix arch timer behavior for disabled interrupts ") LR_STATE_PENDING is queued back by vgic_retire_lr() itself. Also, it clears vlr.state itself. Therefore, we remove the same, now duplicated, check with all accompanying bit manipulations from vgic_unqueue_irqs(). 3. vgic_retire_lr() is always accompanied by vgic_irq_clear_queued(). Since it already does more than just clearing the LR, move vgic_irq_clear_queued() inside of it. Signed-off-by: NPavel Fedin <p.fedin@samsung.com> Signed-off-by: NChristoffer Dall <christoffer.dall@linaro.org>
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由 Pavel Fedin 提交于
Currently we use vgic_irq_lr_map in order to track which LRs hold which IRQs, and lr_used bitmap in order to track which LRs are used or free. vgic_irq_lr_map is actually used only for piggy-back optimization, and can be easily replaced by iteration over lr_used. This is good because in future, when LPI support is introduced, number of IRQs will grow up to at least 16384, while numbers from 1024 to 8192 are never going to be used. This would be a huge memory waste. In its turn, lr_used is also completely redundant since ae705930 ("arm/arm64: KVM: Keep elrsr/aisr in sync with software model"), because together with lr_used we also update elrsr. This allows to easily replace lr_used with elrsr, inverting all conditions (because in elrsr '1' means 'free'). Signed-off-by: NPavel Fedin <p.fedin@samsung.com> Signed-off-by: NChristoffer Dall <christoffer.dall@linaro.org>
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- 02 11月, 2015 2 次提交
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由 Paolo Bonzini 提交于
Merge branch 'kvm-ppc-next' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into HEAD There's nothing much in the way of new features this time; it's mostly bug fixes, plus Nikunj has implemented support for KVM_CAP_NR_MEMSLOTS.
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由 Paolo Bonzini 提交于
Merge tag 'kvm-s390-next-20151028' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD KVM: s390: Bugfix and cleanups There is one important bug fix for a potential memory corruption and/or guest errors for guests with 63 or 64 vCPUs. This fix would qualify for 4.3 but is some days too late giving that we are about to release 4.3. Given that this patch is cc stable >= 3.15 anyway, we can handle it via 4.4. merge window. This pull request also contains two cleanups.
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- 29 10月, 2015 3 次提交
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由 Christian Borntraeger 提交于
We currently do some magic shifting (by exploiting that exit codes are always a multiple of 4) and a table lookup to jump into the exit handlers. This causes some calculations and checks, just to do an potentially expensive function call. Changing that to a switch statement gives the compiler the chance to inline and dynamically decide between jump tables or inline compare and branches. In addition it makes the code more readable. bloat-o-meter gives me a small reduction in code size: add/remove: 0/7 grow/shrink: 1/1 up/down: 986/-1334 (-348) function old new delta kvm_handle_sie_intercept 72 1058 +986 handle_prog 704 696 -8 handle_noop 54 - -54 handle_partial_execution 60 - -60 intercept_funcs 120 - -120 handle_instruction 198 - -198 handle_validity 210 - -210 handle_stop 316 - -316 handle_external_interrupt 368 - -368 Right now my gcc does conditional branches instead of jump tables. The inlining seems to give us enough cycles as some micro-benchmarking shows minimal improvements, but still in noise. Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com>
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由 Christian Borntraeger 提交于
the s390 debug feature does not need newlines. In fact it will result in empty lines. Get rid of 4 leftovers. Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com> Acked-by: NCornelia Huck <cornelia.huck@de.ibm.com>
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由 David Hildenbrand 提交于
We seemed to have missed a few corner cases in commit f6c137ff ("KVM: s390: randomize sca address"). The SCA has a maximum size of 2112 bytes. By setting the sca_offset to some unlucky numbers, we exceed the page. 0x7c0 (1984) -> Fits exactly 0x7d0 (2000) -> 16 bytes out 0x7e0 (2016) -> 32 bytes out 0x7f0 (2032) -> 48 bytes out One VCPU entry is 32 bytes long. For the last two cases, we actually write data to the other page. 1. The address of the VCPU. 2. Injection/delivery/clearing of SIGP externall calls via SIGP IF. Especially the 2. happens regularly. So this could produce two problems: 1. The guest losing/getting external calls. 2. Random memory overwrites in the host. So this problem happens on every 127 + 128 created VM with 64 VCPUs. Cc: stable@vger.kernel.org # v3.15+ Acked-by: NChristian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: NDavid Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
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- 23 10月, 2015 11 次提交
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由 Michal Marek 提交于
Besides being a coding style issue, it confuses make tags: ctags: Warning: include/kvm/arm_vgic.h:307: null expansion of name pattern "\1" ctags: Warning: include/kvm/arm_vgic.h:308: null expansion of name pattern "\1" ctags: Warning: include/kvm/arm_vgic.h:309: null expansion of name pattern "\1" ctags: Warning: include/kvm/arm_vgic.h:317: null expansion of name pattern "\1" Cc: kvmarm@lists.cs.columbia.edu Signed-off-by: NMichal Marek <mmarek@suse.com> Signed-off-by: NChristoffer Dall <christoffer.dall@linaro.org>
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由 Mark Rutland 提交于
If we panic in hyp mode, we inject a call to panic() into the EL1N host kernel. If a guest context is active, we first attempt to restore the minimal amount of state necessary to execute the host kernel with restore_sysregs. However, the SP is restored as part of restore_common_regs, and so we may return to the host's panic() function with the SP of the guest. Any calculations based on the SP will be bogus, and any attempt to access the stack will result in recursive data aborts. When running Linux as a guest, the guest's EL1N SP is like to be some valid kernel address. In this case, the host kernel may use that region as a stack for panic(), corrupting it in the process. Avoid the problem by restoring the host SP prior to returning to the host. To prevent misleading backtraces in the host, the FP is zeroed at the same time. We don't need any of the other "common" registers in order to panic successfully. Signed-off-by: NMark Rutland <mark.rutland@arm.com> Acked-by: NMarc Zyngier <marc.zyngier@arm.com> Cc: Christoffer Dall <christoffer.dall@linaro.org> Cc: <kvmarm@lists.cs.columbia.edu> Signed-off-by: NChristoffer Dall <christoffer.dall@linaro.org>
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由 Christoffer Dall 提交于
The VGIC and timer code for KVM arm/arm64 doesn't have any tracepoints or tracepoint infrastructure defined. Rewriting some of the timer code handling showed me how much we need this, so let's add these simple trace points once and for all and we can easily expand with additional trace points in these files as we go along. Cc: Wei Huang <wei@redhat.com> Signed-off-by: NChristoffer Dall <christoffer.dall@linaro.org>
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由 Christoffer Dall 提交于
The ARM architecture only saves the exit class to the HSR (ESR_EL2 for arm64) on synchronous exceptions, not on asynchronous exceptions like an IRQ. However, we only report the exception class on kvm_exit, which is confusing because an IRQ looks like it exited at some PC with the same reason as the previous exit. Add a lookup table for the exception index and prepend the kvm_exit tracepoint text with the exception type to clarify this situation. Also resolve the exception class (EC) to a human-friendly text version so the trace output becomes immediately usable for debugging this code. Cc: Wei Huang <wei@redhat.com> Signed-off-by: NChristoffer Dall <christoffer.dall@linaro.org>
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由 Pavel Fedin 提交于
Correct some old mistakes in the API documentation: 1. VCPU is identified by index (using kvm_get_vcpu() function), but "cpu id" can be mistaken for affinity ID. 2. Some error codes are wrong. [ Slightly tweaked some grammer and did some s/CPU index/vcpu_index/ in the descriptions. -Christoffer ] Signed-off-by: NPavel Fedin <p.fedin@samsung.com> Signed-off-by: NChristoffer Dall <christoffer.dall@linaro.org>
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由 Eric Auger 提交于
We introduce kvm_arm_halt_guest and resume functions. They will be used for IRQ forward state change. Halt is synchronous and prevents the guest from being re-entered. We use the same mechanism put in place for PSCI former pause, now renamed power_off. A new flag is introduced in arch vcpu state, pause, only meant to be used by those functions. Signed-off-by: NEric Auger <eric.auger@linaro.org> Reviewed-by: NChristoffer Dall <christoffer.dall@linaro.org> Signed-off-by: NChristoffer Dall <christoffer.dall@linaro.org>
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由 Eric Auger 提交于
In case a vcpu off PSCI call is called just after we executed the vcpu_sleep check, we can enter the guest although power_off is set. Let's check the power_off state in the critical section, just before entering the guest. Signed-off-by: NEric Auger <eric.auger@linaro.org> Reported-by: NChristoffer Dall <christoffer.dall@linaro.org> Reviewed-by: NChristoffer Dall <christoffer.dall@linaro.org> Signed-off-by: NChristoffer Dall <christoffer.dall@linaro.org>
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由 Eric Auger 提交于
kvm_arch_vcpu_runnable now also checks whether the power_off flag is set. Signed-off-by: NEric Auger <eric.auger@linaro.org> Reviewed-by: NChristoffer Dall <christoffer.dall@linaro.org> Signed-off-by: NChristoffer Dall <christoffer.dall@linaro.org>
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由 Eric Auger 提交于
The kvm_vcpu_arch pause field is renamed into power_off to prepare for the introduction of a new pause field. Also vcpu_pause is renamed into vcpu_sleep since we will sleep until both power_off and pause are false. Signed-off-by: NEric Auger <eric.auger@linaro.org> Reviewed-by: NChristoffer Dall <christoffer.dall@linaro.org> Signed-off-by: NChristoffer Dall <christoffer.dall@linaro.org>
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由 Wei Huang 提交于
vhost drivers provide guest VMs with better I/O performance and lower CPU utilization. This patch allows users to select vhost devices under KVM configuration menu on ARM. This makes vhost support on arm/arm64 on a par with other architectures (e.g. x86, ppc). Signed-off-by: NWei Huang <wei@redhat.com> Signed-off-by: NChristoffer Dall <christoffer.dall@linaro.org>
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由 Christoffer Dall 提交于
We mark edge-triggered interrupts with the HW bit set as queued to prevent the VGIC code from injecting LRs with both the Active and Pending bits set at the same time while also setting the HW bit, because the hardware does not support this. However, this means that we must also clear the queued flag when we sync back a LR where the state on the physical distributor went from active to inactive because the guest deactivated the interrupt. At this point we must also check if the interrupt is pending on the distributor, and tell the VGIC to queue it again if it is. Since these actions on the sync path are extremely close to those for level-triggered interrupts, rename process_level_irq to process_queued_irq, allowing it to cater for both cases. Signed-off-by: NChristoffer Dall <christoffer.dall@linaro.org>
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