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2016-07-21kvm-irqchip: i386: add hook for add/remove virqPeter Xu
Adding two hooks to be notified when adding/removing msi routes. There are two kinds of MSI routes: - in kvm_irqchip_add_irq_route(): before assigning IRQFD. Used by vhost, vfio, etc. - in kvm_irqchip_send_msi(): when sending direct MSI message, if direct MSI not allowed, we will first create one MSI route entry in the kernel, then trigger it. This patch only hooks the first one (irqfd case). We do not need to take care for the 2nd one, since it's only used by QEMU userspace (kvm-apic) and the messages will always do in-time translation when triggered. While we need to note them down for the 1st one, so that we can notify the kernel when cache invalidation happens. Also, we do not hook IOAPIC msi routes (we have explicit notifier for IOAPIC to keep its cache updated). We only need to care about irqfd users. Signed-off-by: Peter Xu <peterx@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2016-06-16os-posix: include sys/mman.hPaolo Bonzini
qemu/osdep.h checks whether MAP_ANONYMOUS is defined, but this check is bogus without a previous inclusion of sys/mman.h. Include it in sysemu/os-posix.h and remove it from everywhere else. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-05-19hw: explicitly include qemu/log.hPaolo Bonzini
Move the inclusion out of hw/hw.h, most files do not need it. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-03-30arm: enhance kvm_arm_create_scratch_host_vcpuPeter Xu
Support passing NULL for the first parameter (with the same effect as passing an empty array) and for the third parameter (meaning that we should not attempt to init the vcpu). Signed-off-by: Peter Xu <peterx@redhat.com> Acked-by: Sergey Fedorov <serge.fdrv@gmail.com> Message-id: 1458788142-17509-3-git-send-email-peterx@redhat.com [PMM: tweaked commit message, comment] Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-01-18target-arm: Clean up includesPeter Maydell
Clean up includes so that osdep.h is included first and headers which it implies are not included manually. This commit was created with scripts/clean-includes. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Daniel P. Berrange <berrange@redhat.com> Message-id: 1449505425-32022-3-git-send-email-peter.maydell@linaro.org
2015-12-17kvm: x86: add support for KVM_CAP_SPLIT_IRQCHIPPaolo Bonzini
This patch adds support for split IRQ chip mode. When KVM_CAP_SPLIT_IRQCHIP is enabled: 1.) The PIC, PIT, and IOAPIC are implemented in userspace while the LAPIC is implemented by KVM. 2.) The software IOAPIC delivers interrupts to the KVM LAPIC via kvm_set_irq. Interrupt delivery is configured via the MSI routing table, for which routes are reserved in target-i386/kvm.c then configured in hw/intc/ioapic.c 3.) KVM delivers IOAPIC EOIs via a new exit KVM_EXIT_IOAPIC_EOI, which is handled in target-i386/kvm.c and relayed to the software IOAPIC via ioapic_eoi_broadcast. Signed-off-by: Matt Gingell <gingell@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-12-17target-arm: kvm - add support for HW assisted debugAlex Bennée
This adds basic support for HW assisted debug. The ioctl interface to KVM allows us to pass an implementation defined number of break and watch point registers. When KVM_GUESTDBG_USE_HW is specified these debug registers will be installed in place on the world switch into the guest. The hardware is actually capable of more advanced matching but it is unclear if this expressiveness is available via the gdbstub protocol. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-id: 1449599553-24713-5-git-send-email-alex.bennee@linaro.org Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-12-17target-arm: kvm - implement software breakpointsAlex Bennée
These don't involve messing around with debug registers, just setting the breakpoint instruction in memory. GDB will not use this mechanism if it can't access the memory to write the breakpoint. All the kernel has to do is ensure the hypervisor traps the breakpoint exceptions and returns to userspace. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-id: 1449599553-24713-3-git-send-email-alex.bennee@linaro.org [PMM: Fixed typo in comment] Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-10-19kvm: Pass PCI device pointer to MSI routing functionsPavel Fedin
In-kernel ITS emulation on ARM64 will require to supply requester IDs. These IDs can now be retrieved from the device pointer using new pci_requester_id() function. This patch adds pci_dev pointer to KVM GSI routing functions and makes callers passing it. x86 architecture does not use requester IDs, but hw/i386/kvm/pci-assign.c also made passing PCI device pointer instead of NULL for consistency with the rest of the code. Signed-off-by: Pavel Fedin <p.fedin@samsung.com> Message-Id: <ce081423ba2394a4efc30f30708fca07656bc500.1444916432.git.p.fedin@samsung.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-09-24arm_kvm: Do not assume particular GIC type in kvm_arch_irqchip_create()Pavel Fedin
This allows us to use different GIC types from v2. There are no kernels which could advertise KVM_CAP_DEVICE_CTRL without the actual ability to create GIC with it. GIC version probe code moved to kvm_arm_vgic_probe() which will be used later. Signed-off-by: Pavel Fedin <p.fedin@samsung.com> Reviewed-by: Eric Auger <eric.auger@linaro.org> Tested-by: Ashok kumar <ashoks@broadcom.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 015f4d9e4a8a50dfbdd734c4730558e24a69c6dc.1441784344.git.p.fedin@samsung.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-07-21target-arm: kvm: Differentiate registers based on write-back levelsChristoffer Dall
Some registers like the CNTVCT register should only be written to the kernel as part of machine initialization or on vmload operations, but never during runtime, as this can potentially make time go backwards or create inconsistent time observations between VCPUs. Introduce a list of registers that should not be written back at runtime and check this list on syncing the register state to the KVM state. Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org> Message-id: 1437046488-10773-1-git-send-email-christoffer.dall@linaro.org [PMM: tweaked a few comments, added the new argument to the stub write_list_to_kvmstate() in target-arm/kvm-stub.c] Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-06-02kvm: introduce kvm_arch_msi_data_to_gsiEric Auger
On ARM the MSI data corresponds to the shared peripheral interrupt (SPI) ID. This latter equals to the SPI index + 32. to retrieve the SPI index, matching the gsi, an architecture specific function is introduced. Signed-off-by: Eric Auger <eric.auger@linaro.org> Acked-by: Christoffer Dall <christoffer.dall@linaro.org> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-04-30kvm: add support for memory transaction attributesPaolo Bonzini
Let kvm_arch_post_run convert fields in the kvm_run struct to MemTxAttrs. These are then passed to address_space_rw. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-04-01target-arm: kvm: save/restore mp stateAlex Bennée
This adds the saving and restore of the current Multi-Processing state of the machine. While the KVM_GET/SET_MP_STATE API exposes a number of potential states for x86 we only use two for ARM. Either the process is running or not. We then save this state into the cpu_powered TCG state to avoid changing the serialisation format. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-03-11kvm: add machine state to kvm_arch_initMarcel Apfelbaum
Needed to query machine's properties. Signed-off-by: Marcel Apfelbaum <marcel@redhat.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
2015-01-12kvm: extend kvm_irqchip_add_msi_route to work on s390Frank Blaschka
on s390 MSI-X irqs are presented as thin or adapter interrupts for this we have to reorganize the routing entry to contain valid information for the adapter interrupt code on s390. To minimize impact on existing code we introduce an architecture function to fixup the routing entry. Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-12-11target-arm: Check error conditions on kvm_arm_reset_vcpuChristoffer Dall
When resetting a VCPU we currently call both kvm_arm_vcpu_init() and write_kvmstate_to_list(), both of which can fail, but we never check the return value. The only choice here is to print an error an exit if the calls fail. Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1418039630-11773-1-git-send-email-christoffer.dall@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-12-11target-arm/kvm: make reg sync code common between kvm32/64Alex Bennée
Before we launch a guest we query KVM for the list of "co-processor" registers it knows about. This is used to synchronize system register state for the bulk of coprocessor/system registers. Move this code from the 32-bit specific vcpu init function into a common routine and call it also from the 64-bit vcpu init. This allows system registers to migrate correctly when using KVM, and also permits QEMU code to see the current KVM register state (which will be needed to support big-endian guests, since the virtio endianness callback must check for some system register settings). Since vcpu reset also has to sync registers, we move the 32 bit kvm_arm_reset_vcpu() into common code as well and share it with the 64 bit version. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> [PMM: just copy the 32-bit code rather than improving it along the way; don't share reg_syncs_via_tuple_list() between 32 and 64 bit; tweak function names; move reset] Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-06-19target-arm: Common kvm_arm_vcpu_init() for KVM ARM and KVM ARM64Pranavkumar Sawargaonkar
Introduce a common kvm_arm_vcpu_init() for doing KVM_ARM_VCPU_INIT ioctl in KVM ARM and KVM ARM64. This also helps us factor-out few common code lines from kvm_arch_init_vcpu() for KVM ARM/ARM64. Signed-off-by: Pranavkumar Sawargaonkar <pranavkumar@linaro.org> Signed-off-by: Anup Patel <anup.patel@linaro.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1402901605-24551-5-git-send-email-pranavkumar@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-02-26arm: vgic device control api supportChristoffer Dall
Support creating the ARM vgic device through the device control API and setting the base address for the distributor and cpu interfaces in KVM VMs using this API. Because the older KVM_CREATE_IRQCHIP interface needs the irq chip to be created prior to creating the VCPUs, we first test if we can use the device control API in kvm_arch_irqchip_create (using the test flag from the device control API). If we cannot, it means we have to fall back to KVM_CREATE_IRQCHIP and use the older ioctl at this point in time. If however, we can use the device control API, we don't do anything and wait until the arm_gic_kvm driver initializes and let that use the device control API. Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org> Message-id: 1392687720-26806-5-git-send-email-christoffer.dall@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2013-12-17target-arm: Add minimal KVM AArch64 supportMian M. Hamayun
Add the bare minimum set of functions needed for control of an AArch64 KVM vcpu: * CPU initialization * minimal get/put register functions which only handle the basic state of the CPU Signed-off-by: Mian M. Hamayun <m.hamayun@virtualopensystems.com> Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1385645602-18662-4-git-send-email-peter.maydell@linaro.org [PMM: significantly overhauled; most notably: * code lives in kvm64.c rather than using #ifdefs * support '-cpu host' rather than implicitly using whatever the host's CPU is regardless of what the user requests * fix bug attempting to get/set nonexistent X[31] * fix bug writing 64 bit kernel pstate into uint32_t env field ] Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
2013-12-17target-arm/kvm: Split 32 bit only code into its own filePeter Maydell
Split ARM KVM support code which is 32 bit specific out into its own file, which we only compile on 32 bit hosts. This will give us a place to add the 64 bit support code without adding lots of ifdefs to kvm.c. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1385645602-18662-2-git-send-email-peter.maydell@linaro.org Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
2013-12-10target-arm: Provide '-cpu host' when running KVMPeter Maydell
Implement '-cpu host' for ARM when we're using KVM, broadly in line with other KVM-supporting architectures. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Message-id: 1385140638-10444-11-git-send-email-peter.maydell@linaro.org
2013-12-10target-arm: Don't hardcode KVM target CPU to be A15Peter Maydell
Instead of assuming that a KVM target CPU must always be a Cortex-A15 and hardcoding this in kvm_arch_init_vcpu(), store the KVM_ARM_TARGET_* value in the ARMCPU class, and use that. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Message-id: 1385140638-10444-10-git-send-email-peter.maydell@linaro.org
2013-12-10target-arm: Allow secondary KVM CPUs to be booted via PSCIPeter Maydell
New ARM boards are generally expected to boot their secondary CPUs via the PSCI interface, rather than ad-hoc "loop around in holding pen code" as hw/arm/boot.c implements. In particular this is necessary for mach-virt kernels. For KVM we achieve this by creating the VCPUs with a feature flag marking them as starting in PSCI powered-down state; the guest kernel will then make a PSCI call (implemented in the host kernel) to start the secondaries at an address of its choosing once it has got the primary CPU up. Implement this setting of the feature flag, controlled by a qdev property for ARMCPU, which board code can set if it is a PSCI system. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Message-id: 1385140638-10444-7-git-send-email-peter.maydell@linaro.org
2013-12-10target-arm: Provide mechanism for getting KVM constants even if not CONFIG_KVMPeter Maydell
There are a number of places where it would be convenient for ARM code to have working definitions of KVM constants even in code which is compiled with CONFIG_KVM not set. In this situation we can't simply include the kernel KVM headers (which might conflict with host header definitions or not even compile on the compiler we're using) so we have to redefine equivalent constants. Provide a mechanism for doing this and checking that the values match, and use it for the constants we're currently exposing via an ad-hoc mechanism. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Message-id: 1385140638-10444-2-git-send-email-peter.maydell@linaro.org
2013-10-31target-arm: fix sorting issue of KVM cpreg listAlvise Rigo
The compare_u64 function was not sorting the KVM cpreg_list in the right way due to the wrong returned value. Since we are comparing two 64bit values we can't simply return their difference if the returned type is int. Signed-off-by: Alvise Rigo <a.rigo@virtualopensystems.com> Message-id: 1381513125-26802-2-git-send-email-a.rigo@virtualopensystems.com [PMM: fixed coding style, indent and commit message formatting] Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2013-07-04memory: add ref/unref callsPaolo Bonzini
Add ref/unref calls at the following places: - places where memory regions are stashed by a listener and used outside the BQL (including in Xen or KVM). - memory_region_find callsites - creation of aliases and containers (only the aliased/contained region gets a reference to avoid loops) - around calls to del_subregion/add_subregion, where the region could disappear after the first call Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-06-25target-arm: Use tuple list to sync cp regs with KVMPeter Maydell
Use the tuple list of cp registers for syncing KVM state to QEMU, rather than only syncing a very minimal set by hand. Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2013-06-25target-arm: Reinitialize all KVM VCPU registers on resetPeter Maydell
Since the ARM KVM API doesn't include a "reset this VCPU" ioctl, we have to capture the initial values of every register it knows about so that we can reset the VCPU by feeding those values back again. Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2013-06-25target-arm: Initialize cpreg list from KVM when using KVMPeter Maydell
When using KVM, use the kernel's initial state to set up the cpreg list, and sync to and from the kernel when doing migration. Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2013-06-25target-arm: Convert TCG to using (index,value) list for cp migrationPeter Maydell
Convert the TCG ARM target to using an (index,value) list for migrating coprocessors. The primary benefit of the (index,value) list is for passing state between KVM and QEMU, but it works for TCG-to-TCG migration as well and is a useful self-contained first step. Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2013-06-12KVM: ARM: Add dummy kvm_arch_init_irq_routing()Alexey Kardashevskiy
The common KVM code insists on calling kvm_arch_init_irq_routing() as soon as it sees kernel header support for it (regardless of whether QEMU supports it). Provide a dummy function to satisfy this. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2013-05-03target-arm: Fix incorrect check of kvm_vcpu_ioctl return valuePeter Maydell
kvm_vcpu_ioctl() returns -ETHING on error, not ETHING -- correct an incorrect check in kvm_arch_init_vcpu(). This would not have had any significant ill-effects -- we would just have propagated the less useful ENOENT up to the caller rather than the more accurate EINVAL in the unlikely case that the kernel didn't have VFP-D32 support. Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2013-04-15arm: fix location of some include filesPeter Maydell
The recent rearrangement of include files had some minor errors: devices.h is not ARM specific and should not be in arm/ arm.h should be in arm/ Move these two headers to correct this. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-04-08hw: move headers to include/Paolo Bonzini
Many of these should be cleaned up with proper qdev-/QOM-ification. Right now there are many catch-all headers in include/hw/ARCH depending on cpu.h, and this makes it necessary to compile these files per-target. However, fixing this does not belong in these patches. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-03-05target-arm: Use MemoryListener to identify GIC base address for KVMPeter Maydell
When using an in-kernel GIC with KVM, we need to tell the kernel where the GIC's memory mapped registers live. Do this by registering a MemoryListener which tracks where the board model maps the A15's private peripherals, so we can finish the GIC initialisation when the GIC is actually mapped. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
2013-03-05ARM KVM: save and load VFP registers from kernelPeter Maydell
Add support for saving and restoring VFP register state from the kernel. This includes a check that the KVM-created CPU has full VFP support (as the TCG Cortex-A15 model always does), since for the moment ARM QEMU doesn't have any way to tweak optional features on created CPUs. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
2013-03-05ARM: KVM: Add support for KVM on ARM architectureChristoffer Dall
Add basic support for KVM on ARM architecture. Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu> [PMM: Minor tweaks and code cleanup, switch to ONE_REG] Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
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