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2013-04-17KVM: ARM: Fix kvm_vm_ioctl_irq_lineAlexander Graf1-1/+2
Commit aa2fbe6d broke the ARM KVM target by introducing a new parameter to irq handling functions. Fix the function prototype to get things compiling again and ignore the parameter just like we did before Signed-off-by: Alexander Graf <agraf@suse.de> Acked-by: Christoffer Dall <cdall@cs.columbia.edu> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2013-03-22Merge branch 'kvm-arm/vgic-fixes' of ↵Russell King1-21/+14
git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into fixes
2013-03-07ARM: KVM: Fix length of mmio accessMarc Zyngier1-3/+4
Instead of hardcoding the maximum MMIO access to be 4 bytes, compare it to sizeof(unsigned long), which will do the right thing on both 32 and 64bit systems. Same thing for sign extention. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
2013-03-07ARM: KVM: sanitize freeing of HYP page tablesMarc Zyngier1-18/+26
Instead of trying to free everything from PAGE_OFFSET to the top of memory, use the virt_addr_valid macro to check the upper limit. Also do the same for the vmalloc region where the IO mappings are allocated. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
2013-03-07ARM: KVM: move kvm_handle_wfi to handle_exit.cMarc Zyngier2-16/+19
It has little to do in emulate.c these days... Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-03-07ARM: KVM: change kvm_tlb_flush_vmid to kvm_tlb_flush_vmid_ipaMarc Zyngier2-7/+10
v8 is capable of invalidating Stage-2 by IPA, but v7 is not. Change kvm_tlb_flush_vmid() to take an IPA parameter, which is then ignored by the invalidation code (and nuke the whole TLB as it always did). This allows v8 to implement a more optimized strategy. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-03-07ARM: KVM: move include of asm/idmap.h to kvm_mmu.hMarc Zyngier1-1/+0
Since the arm64 code doesn't have a global asm/idmap.h file, move the inclusion to asm/kvm_mmu.h. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-03-07ARM: KVM: vgic: decouple alignment restriction from page sizeMarc Zyngier1-1/+1
The virtual GIC is supposed to be 4kB aligned. On a 64kB page system, comparing the alignment to PAGE_SIZE is wrong. Use SZ_4K instead. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-03-07ARM: KVM: fix fault_ipa computingMarc Zyngier1-2/+7
The ARM ARM says that HPFAR reports bits [39:12] of the faulting IPA, and we need to complement it with the bottom 12 bits of the faulting VA. This is always 12 bits, irrespective of the page size. Makes it clearer in the code. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-03-07ARM: KVM: move kvm_target_cpu to guest.cMarc Zyngier2-17/+17
guest.c already contains some target-specific checks. Let's move kvm_target_cpu() over there so arm.c is mostly target agnostic. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-03-07ARM: KVM: fix address validation for HYP mappingsMarc Zyngier1-2/+7
__create_hyp_mappings() performs some kind of address validation before creating the mapping, by verifying that the start address is above PAGE_OFFSET. This check is not completely correct for kernel memory (the upper boundary has to be checked as well so we do not end up with highmem pages), and wrong for IO mappings (the mapping must exist in the vmalloc region). Fix this by using the proper predicates (virt_addr_valid and is_vmalloc_addr), which also work correctly on ARM64 (where the vmalloc region is below PAGE_OFFSET). Also change the BUG_ON() into a less agressive error return. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-03-07ARM: KVM: allow HYP mappings to be at an offset from kernel mappingsMarc Zyngier1-16/+27
arm64 cannot represent the kernel VAs in HYP mode, because of the lack of TTBR1 at EL2. A way to cope with this situation is to have HYP VAs to be an offset from the kernel VAs. Introduce macros to convert a kernel VA to a HYP VA, make the HYP mapping functions use these conversion macros. Also change the documentation to reflect the existence of the offset. On ARM, where we can have an identity mapping between kernel and HYP, the macros are without any effect. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-03-07ARM: KVM: use kvm_kernel_vfp_t as an abstract type for VFP containersMarc Zyngier1-3/+3
In order to keep the VFP allocation code common, use an abstract type for the VFP containers. Maps onto struct vfp_hard_struct on ARM. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-03-07ARM: KVM: move hyp init to kvm_host.hMarc Zyngier1-11/+1
Make the split of the pgd_ptr an implementation specific thing by moving the init call to an inline function. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-03-07ARM: KVM: abstract most MMU operationsMarc Zyngier1-46/+12
Move low level MMU-related operations to kvm_mmu.h. This makes the MMU code reusable by the arm64 port. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-03-07KVM: ARM: Reintroduce trace_kvm_hvcChristoffer Dall1-0/+5
This one got lost in the move to handle_exit, so let's reintroduce it using an accessor to the immediate value field like the other ones. Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
2013-03-07ARM: KVM: move exit handler selection to a separate fileMarc Zyngier3-114/+141
The exit handler selection code cannot be shared with arm64 (two different modes, more exception classes...). Move it to a separate file (handle_exit.c). Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
2013-03-07ARM: KVM: move kvm_condition_valid to emulate.cMarc Zyngier2-45/+45
This is really hardware emulation, and as such it better be with its little friends. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-03-07ARM: KVM: abstract HSR_EC_IABT awayMarc Zyngier1-5/+3
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-03-07ARM: KVM: abstract fault decoding awayMarc Zyngier1-1/+1
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-03-07ARM: KVM: abstract exception class decoding awayMarc Zyngier2-3/+3
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-03-07ARM: KVM: abstract IL decoding awayMarc Zyngier3-4/+3
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
2013-03-07ARM: KVM: abstract SAS decoding awayMarc Zyngier1-14/+3
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
2013-03-07ARM: KVM: abstract S1TW abort detection awayMarc Zyngier1-1/+1
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
2013-03-07ARM: KVM: abstract (and fix) external abort detection awayMarc Zyngier1-1/+1
Bit 8 is cache maintenance, bit 9 is external abort. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
2013-03-07ARM: KVM: abstract HSR_SRT_{MASK,SHIFT} awayMarc Zyngier1-1/+1
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-03-07ARM: KVM: abstract HSR_SSE awayMarc Zyngier1-1/+1
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
2013-03-07ARM: KVM: abstract HSR_WNR awayMarc Zyngier1-1/+1
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
2013-03-07ARM: KVM: abstract HSR_ISV awayMarc Zyngier1-1/+1
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
2013-03-07ARM: KVM: abstract fault register accessesMarc Zyngier4-45/+45
Instead of directly accessing the fault registers, use proper accessors so the core code can be shared. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-03-07ARM: KVM: convert GP registers from u32 to unsigned longMarc Zyngier4-16/+16
On 32bit ARM, unsigned long is guaranteed to be a 32bit quantity. On 64bit ARM, it is a 64bit quantity. In order to be able to share code between the two architectures, convert the registers to be unsigned long, so the core code can be oblivious of the change. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-03-07KVM: ARM: Fix wrong address in commentJonghwan Choi1-2/+2
hyp_hvc vector offset is 0x14 and hyp_svc vector offset is 0x8. Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com> Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
2013-03-05KVM: ARM: Remove kvm_arch_set_memory_region()Takuya Yoshikawa1-8/+0
This was replaced with prepare/commit long before: commit f7784b8ec9b6a041fa828cfbe9012fe51933f5ac KVM: split kvm_arch_set_memory_region into prepare and commit Signed-off-by: Takuya Yoshikawa <yoshikawa_takuya_b1@lab.ntt.co.jp> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2013-03-05KVM: set_memory_region: Refactor commit_memory_region()Takuya Yoshikawa1-1/+2
This patch makes the parameter old a const pointer to the old memory slot and adds a new parameter named change to know the change being requested: the former is for removing extra copying and the latter is for cleaning up the code. Signed-off-by: Takuya Yoshikawa <yoshikawa_takuya_b1@lab.ntt.co.jp> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2013-03-05KVM: set_memory_region: Refactor prepare_memory_region()Takuya Yoshikawa1-2/+2
This patch drops the parameter old, a copy of the old memory slot, and adds a new parameter named change to know the change being requested. This not only cleans up the code but also removes extra copying of the memory slot structure. Signed-off-by: Takuya Yoshikawa <yoshikawa_takuya_b1@lab.ntt.co.jp> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2013-03-05KVM: set_memory_region: Drop user_alloc from prepare/commit_memory_region()Takuya Yoshikawa1-4/+2
X86 does not use this any more. The remaining user, s390's !user_alloc check, can be simply removed since KVM_SET_MEMORY_REGION ioctl is no longer supported. Note: fixed powerpc's indentations with spaces to suppress checkpatch errors. Signed-off-by: Takuya Yoshikawa <yoshikawa_takuya_b1@lab.ntt.co.jp> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2013-02-25ARM: KVM: fix compilation after removal of user_alloc from struct ↵Marc Zyngier1-5/+0
kvm_memory_slot Commit 7a905b1 (KVM: Remove user_alloc from struct kvm_memory_slot) broke KVM/ARM by removing the user_alloc field from a public structure. As we only used this field to alert the user that we didn't support this operation mode, there is no harm in discarding this bit of code without any remorse. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-02-25ARM: KVM: fix kvm_arch_{prepare,commit}_memory_regionMarc Zyngier1-2/+2
Commit f82a8cfe9 (KVM: struct kvm_memory_slot.user_alloc -> bool) broke the ARM KVM port by changing the prototype of two global functions. Apply the same change to fix the compilation breakage. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-02-22ARM: KVM: vgic: take distributor lock on sync_hwstate pathMarc Zyngier1-18/+6
Now that the maintenance interrupt handling is actually out of the handler itself, the code becomes quite racy as we can get preempted while we process the state. Wrapping this code around the distributor lock ensures that we're not preempted and relatively race-free. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-02-22ARM: KVM: vgic: force EOIed LRs to the empty stateMarc Zyngier1-3/+8
The VGIC doesn't guarantee that an EOIed LR that has been configured to generate a maintenance interrupt will appear as empty. While the code recovers from this situation, it is better to clean the LR and flag it as empty so it can be quickly recycled. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-02-11ARM: KVM: arch_timers: Wire the init code and config optionMarc Zyngier4-0/+21
It is now possible to select CONFIG_KVM_ARM_TIMER to enable the KVM architected timer support. Reviewed-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-02-11ARM: KVM: arch_timers: Add timer world switchMarc Zyngier3-0/+66
Do the necessary save/restore dance for the timers in the world switch code. In the process, allow the guest to read the physical counter, which is useful for its own clock_event_device. Reviewed-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-02-11ARM: KVM: arch_timers: Add guest timer core supportMarc Zyngier3-0/+304
Add some the architected timer related infrastructure, and support timer interrupt injection, which can happen as a resultof three possible events: - The virtual timer interrupt has fired while we were still executing the guest - The timer interrupt hasn't fired, but it expired while we were doing the world switch - A hrtimer we programmed earlier has fired Reviewed-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-02-11ARM: KVM: Add VGIC configuration optionMarc Zyngier1-0/+8
It is now possible to select the VGIC configuration option. Reviewed-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-02-11ARM: KVM: VGIC initialisation codeMarc Zyngier2-0/+239
Add the init code for the hypervisor, the virtual machine, and the virtual CPUs. An interrupt handler is also wired to allow the VGIC maintenance interrupts, used to deal with level triggered interrupts and LR underflows. A CPU hotplug notifier is registered to disable/enable the interrupt as requested. Reviewed-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-02-11ARM: KVM: VGIC control interface world switchMarc Zyngier1-0/+74
Enable the VGIC control interface to be save-restored on world switch. Reviewed-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-02-11ARM: KVM: VGIC interrupt injectionMarc Zyngier2-10/+162
Plug the interrupt injection code. Interrupts can now be generated from user space. Reviewed-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-02-11ARM: KVM: vgic: retire queued, disabled interruptsMarc Zyngier1-0/+30
An interrupt may have been disabled after being made pending on the CPU interface (the classic case is a timer running while we're rebooting the guest - the interrupt would kick as soon as the CPU interface gets enabled, with deadly consequences). The solution is to examine already active LRs, and check the interrupt is still enabled. If not, just retire it. Reviewed-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-02-11ARM: KVM: VGIC virtual CPU interface managementMarc Zyngier1-1/+326
Add VGIC virtual CPU interface code, picking pending interrupts from the distributor and stashing them in the VGIC control interface list registers. Reviewed-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-02-11ARM: KVM: VGIC distributor handlingMarc Zyngier1-1/+595
Add the GIC distributor emulation code. A number of the GIC features are simply ignored as they are not required to boot a Linux guest. Reviewed-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
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