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2016-02-23KVM: use list_for_each_entry_safeGeliang Tang
Use list_for_each_entry_safe() instead of list_for_each_safe() to simplify the code. Signed-off-by: Geliang Tang <geliangtang@163.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-02-23KVM: x86: MMU: Move handle_mmio_page_fault() call to kvm_mmu_page_fault()Takuya Yoshikawa
Rather than placing a handle_mmio_page_fault() call in each vcpu->arch.mmu.page_fault() handler, moving it up to kvm_mmu_page_fault() makes the code better: - avoids code duplication - for kvm_arch_async_page_ready(), which is the other caller of vcpu->arch.mmu.page_fault(), removes an extra error_code check - avoids returning both RET_MMIO_PF_* values and raw integer values from vcpu->arch.mmu.page_fault() Signed-off-by: Takuya Yoshikawa <yoshikawa_takuya_b1@lab.ntt.co.jp> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-02-23KVM: x86: MMU: Consolidate quickly_check_mmio_pf() and is_mmio_page_fault()Takuya Yoshikawa
These two have only slight differences: - whether 'addr' is of type u64 or of type gva_t - whether they have 'direct' parameter or not Concerning the former, quickly_check_mmio_pf()'s u64 is better because 'addr' needs to be able to have both a guest physical address and a guest virtual address. The latter is just a stylistic issue as we can always calculate the mode from the 'vcpu' as is_mmio_page_fault() does. This patch keeps the parameter to make the following patch cleaner. In addition, the patch renames the function to mmio_info_in_cache() to make it clear what it actually checks for. Signed-off-by: Takuya Yoshikawa <yoshikawa_takuya_b1@lab.ntt.co.jp> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-02-16KVM: x86: pass kvm_get_time_scale arguments in hertzPaolo Bonzini
Prepare for improving the precision in the next patch. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-02-16kvm/x86: Hyper-V VMBus hypercall userspace exitAndrey Smetanin
The patch implements KVM_EXIT_HYPERV userspace exit functionality for Hyper-V VMBus hypercalls: HV_X64_HCALL_POST_MESSAGE, HV_X64_HCALL_SIGNAL_EVENT. Changes v3: * use vcpu->arch.complete_userspace_io to setup hypercall result Changes v2: * use KVM_EXIT_HYPERV for hypercalls Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com> Reviewed-by: Roman Kagan <rkagan@virtuozzo.com> CC: Gleb Natapov <gleb@kernel.org> CC: Paolo Bonzini <pbonzini@redhat.com> CC: Joerg Roedel <joro@8bytes.org> CC: "K. Y. Srinivasan" <kys@microsoft.com> CC: Haiyang Zhang <haiyangz@microsoft.com> CC: Roman Kagan <rkagan@virtuozzo.com> CC: Denis V. Lunev <den@openvz.org> CC: qemu-devel@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-02-16kvm/x86: Reject Hyper-V hypercall continuationAndrey Smetanin
Currently we do not support Hyper-V hypercall continuation so reject it. Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com> Reviewed-by: Roman Kagan <rkagan@virtuozzo.com> CC: Gleb Natapov <gleb@kernel.org> CC: Paolo Bonzini <pbonzini@redhat.com> CC: Joerg Roedel <joro@8bytes.org> CC: "K. Y. Srinivasan" <kys@microsoft.com> CC: Haiyang Zhang <haiyangz@microsoft.com> CC: Roman Kagan <rkagan@virtuozzo.com> CC: Denis V. Lunev <den@openvz.org> CC: qemu-devel@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-02-16kvm/x86: Pass return code of kvm_emulate_hypercallAndrey Smetanin
Pass the return code from kvm_emulate_hypercall on to the caller, in order to allow it to indicate to the userspace that the hypercall has to be handled there. Also adjust all the existing code paths to return 1 to make sure the hypercall isn't passed to the userspace without setting kvm_run appropriately. Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com> Reviewed-by: Roman Kagan <rkagan@virtuozzo.com> CC: Gleb Natapov <gleb@kernel.org> CC: Paolo Bonzini <pbonzini@redhat.com> CC: Joerg Roedel <joro@8bytes.org> CC: "K. Y. Srinivasan" <kys@microsoft.com> CC: Haiyang Zhang <haiyangz@microsoft.com> CC: Roman Kagan <rkagan@virtuozzo.com> CC: Denis V. Lunev <den@openvz.org> CC: qemu-devel@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-02-16drivers/hv: Move VMBus hypercall codes into Hyper-V UAPI headerAndrey Smetanin
VMBus hypercall codes inside Hyper-V UAPI header will be used by QEMU to implement VMBus host devices support. Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com> Acked-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Roman Kagan <rkagan@virtuozzo.com> CC: Gleb Natapov <gleb@kernel.org> CC: Paolo Bonzini <pbonzini@redhat.com> CC: Joerg Roedel <joro@8bytes.org> CC: "K. Y. Srinivasan" <kys@microsoft.com> CC: Haiyang Zhang <haiyangz@microsoft.com> CC: Roman Kagan <rkagan@virtuozzo.com> CC: Denis V. Lunev <den@openvz.org> CC: qemu-devel@nongnu.org [Do not rename the constant at the same time as moving it, as that would cause semantic conflicts with the Hyper-V tree. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-02-16kvm/x86: Rename Hyper-V long spin wait hypercallAndrey Smetanin
Rename HV_X64_HV_NOTIFY_LONG_SPIN_WAIT by HVCALL_NOTIFY_LONG_SPIN_WAIT, so the name is more consistent with the other hypercalls. Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com> Reviewed-by: Roman Kagan <rkagan@virtuozzo.com> CC: Gleb Natapov <gleb@kernel.org> CC: Paolo Bonzini <pbonzini@redhat.com> CC: Joerg Roedel <joro@8bytes.org> CC: "K. Y. Srinivasan" <kys@microsoft.com> CC: Haiyang Zhang <haiyangz@microsoft.com> CC: Roman Kagan <rkagan@virtuozzo.com> CC: Denis V. Lunev <den@openvz.org> CC: qemu-devel@nongnu.org [Change name, Andrey used HV_X64_HCALL_NOTIFY_LONG_SPIN_WAIT. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-02-16KVM: x86: fix missed hardware breakpointsPaolo Bonzini
Sometimes when setting a breakpoint a process doesn't stop on it. This is because the debug registers are not loaded correctly on VCPU load. The following simple reproducer from Oleg Nesterov tries using debug registers in both the host and the guest, for example by running "./bp 0 1" on the host and "./bp 14 15" under QEMU. #include <unistd.h> #include <signal.h> #include <stdlib.h> #include <stdio.h> #include <sys/wait.h> #include <sys/ptrace.h> #include <sys/user.h> #include <asm/debugreg.h> #include <assert.h> #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) unsigned long encode_dr7(int drnum, int enable, unsigned int type, unsigned int len) { unsigned long dr7; dr7 = ((len | type) & 0xf) << (DR_CONTROL_SHIFT + drnum * DR_CONTROL_SIZE); if (enable) dr7 |= (DR_GLOBAL_ENABLE << (drnum * DR_ENABLE_SIZE)); return dr7; } int write_dr(int pid, int dr, unsigned long val) { return ptrace(PTRACE_POKEUSER, pid, offsetof (struct user, u_debugreg[dr]), val); } void set_bp(pid_t pid, void *addr) { unsigned long dr7; assert(write_dr(pid, 0, (long)addr) == 0); dr7 = encode_dr7(0, 1, DR_RW_EXECUTE, DR_LEN_1); assert(write_dr(pid, 7, dr7) == 0); } void *get_rip(int pid) { return (void*)ptrace(PTRACE_PEEKUSER, pid, offsetof(struct user, regs.rip), 0); } void test(int nr) { void *bp_addr = &&label + nr, *bp_hit; int pid; printf("test bp %d\n", nr); assert(nr < 16); // see 16 asm nops below pid = fork(); if (!pid) { assert(ptrace(PTRACE_TRACEME, 0,0,0) == 0); kill(getpid(), SIGSTOP); for (;;) { label: asm ( "nop; nop; nop; nop;" "nop; nop; nop; nop;" "nop; nop; nop; nop;" "nop; nop; nop; nop;" ); } } assert(pid == wait(NULL)); set_bp(pid, bp_addr); for (;;) { assert(ptrace(PTRACE_CONT, pid, 0, 0) == 0); assert(pid == wait(NULL)); bp_hit = get_rip(pid); if (bp_hit != bp_addr) fprintf(stderr, "ERR!! hit wrong bp %ld != %d\n", bp_hit - &&label, nr); } } int main(int argc, const char *argv[]) { while (--argc) { int nr = atoi(*++argv); if (!fork()) test(nr); } while (wait(NULL) > 0) ; return 0; } Cc: stable@vger.kernel.org Suggested-by: Nadadv Amit <namit@cs.technion.ac.il> Reported-by: Andrey Wagin <avagin@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-02-16KVM: x86: fix *NULL on invalid low-prio irqRadim Krčmář
Smatch noticed a NULL dereference in kvm_intr_is_single_vcpu_fast that happens if VM already warned about invalid lowest-priority interrupt. Create a function for common code while fixing it. Fixes: 6228a0da8057 ("KVM: x86: Add lowest-priority support for vt-d posted-interrupts") Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-02-16KVM: x86: rewrite handling of scaled TSC for kvmclockPaolo Bonzini
This is the same as before: kvm_scale_tsc(tgt_tsc_khz) = tgt_tsc_khz * ratio = tgt_tsc_khz * user_tsc_khz / tsc_khz (see set_tsc_khz) = user_tsc_khz (see kvm_guest_time_update) = vcpu->arch.virtual_tsc_khz (see kvm_set_tsc_khz) However, computing it through kvm_scale_tsc will make it possible to include the NTP correction in tgt_tsc_khz. Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-02-16KVM: x86: rename argument to kvm_set_tsc_khzPaolo Bonzini
This refers to the desired (scaled) frequency, which is called user_tsc_khz in the rest of the file. Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-02-16KVM: VMX: Fix guest debugging while in L2Jan Kiszka
When we take a #DB or #BP vmexit while in guest mode, we first of all need to check if there is ongoing guest debugging that might be interested in the event. Currently, we unconditionally leave L2 and inject the event into L1 if it is intercepting the exceptions. That breaks things marvelously. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-02-16KVM: VMX: Factor out is_exception_n helperJan Kiszka
There is quite some common code in all these is_<exception>() helpers. Factor it out before adding even more of them. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-02-16KVM: halt_polling: improve grow/shrink settingsChristian Borntraeger
Right now halt_poll_ns can be change during runtime. The grow and shrink factors can only be set during module load. Lets fix several aspects of grow shrink: - make grow/shrink changeable by root - make all variables unsigned int - read the variables once to prevent races Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-02-16Merge tag 'kvm-s390-next-4.6-1' of ↵Paolo Bonzini
git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD KVM: s390: Fixes and features for kvm/next (4.6) 1. also provide the floating point registers via sync regs 2. Separate out intruction vs. data accesses 3. Fix program interrupts in some cases 4. Documentation fixes 5. dirty log improvements for huge guests
2016-02-10KVM: s390: bail out early on fatal signal in dirty loggingChristian Borntraeger
A KVM_GET_DIRTY_LOG ioctl might take a long time. This can result in fatal signals seemingly being ignored. Lets bail out during the dirty bit sync, if a fatal signal is pending. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2016-02-10KVM: s390: do not block CPU on dirty loggingChristian Borntraeger
When doing dirty logging on huge guests (e.g.600GB) we sometimes get rcu stall timeouts with backtraces like [ 2753.194083] ([<0000000000112fb2>] show_trace+0x12a/0x130) [ 2753.194092] [<0000000000113024>] show_stack+0x6c/0xe8 [ 2753.194094] [<00000000001ee6a8>] rcu_pending+0x358/0xa48 [ 2753.194099] [<00000000001f20cc>] rcu_check_callbacks+0x84/0x168 [ 2753.194102] [<0000000000167654>] update_process_times+0x54/0x80 [ 2753.194107] [<00000000001bdb5c>] tick_sched_handle.isra.16+0x4c/0x60 [ 2753.194113] [<00000000001bdbd8>] tick_sched_timer+0x68/0x90 [ 2753.194115] [<0000000000182a88>] __run_hrtimer+0x88/0x1f8 [ 2753.194119] [<00000000001838ba>] hrtimer_interrupt+0x122/0x2b0 [ 2753.194121] [<000000000010d034>] do_extint+0x16c/0x170 [ 2753.194123] [<00000000005e206e>] ext_skip+0x38/0x3e [ 2753.194129] [<000000000012157c>] gmap_test_and_clear_dirty+0xcc/0x118 [ 2753.194134] ([<00000000001214ea>] gmap_test_and_clear_dirty+0x3a/0x118) [ 2753.194137] [<0000000000132da4>] kvm_vm_ioctl_get_dirty_log+0xd4/0x1b0 [ 2753.194143] [<000000000012ac12>] kvm_vm_ioctl+0x21a/0x548 [ 2753.194146] [<00000000002b57f6>] do_vfs_ioctl+0x30e/0x518 [ 2753.194149] [<00000000002b5a9c>] SyS_ioctl+0x9c/0xb0 [ 2753.194151] [<00000000005e1ae6>] sysc_tracego+0x14/0x1a [ 2753.194153] [<000003ffb75f3972>] 0x3ffb75f3972 We should do a cond_resched in here. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2016-02-10KVM: s390: do not take mmap_sem on dirty log queryChristian Borntraeger
Dirty log query can take a long time for huge guests. Holding the mmap_sem for very long times can cause some unwanted latencies. Turns out that we do not need to hold the mmap semaphore. We hold the slots_lock for gfn->hva translation and walk the page tables with that address, so no need to look at the VMAs. KVM also holds a reference to the mm, which should prevent other things going away. During the walk we take the necessary ptl locks. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2016-02-10KVM: s390: usage hint for adapter mappingsCornelia Huck
The interface for adapter mappings was designed with code in mind that maps each address only once; let's document this. Otherwise, duplicate mappings are added to the list, which makes the code ineffective and uses up the limited amount of mapping needlessly. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2016-02-10KVM: s390: add documentation of KVM_S390_VM_CRYPTODavid Hildenbrand
Let's properly document KVM_S390_VM_CRYPTO and its attributes. Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2016-02-10KVM: s390: add documentation of KVM_S390_VM_TODDavid Hildenbrand
Let's properly document KVM_S390_VM_TOD and its attributes. Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2016-02-10KVM: s390: remove old fragment of vector registersDavid Hildenbrand
Since commit 9977e886cbbc ("s390/kernel: lazy restore fpu registers"), vregs in struct sie_page is unsed. We can safely remove the field and the definition. Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2016-02-10KVM: s390: instruction-fetching exceptions on SIE faultsDavid Hildenbrand
On instruction-fetch exceptions, we have to forward the PSW by any valid ilc and correctly use that ilc when injecting the irq. Injection will already take care of rewinding the PSW if we injected a nullifying program irq, so we don't need special handling prior to injection. Until now, autodetection would have guessed an ilc of 0. Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2016-02-10KVM: s390: provide prog irq ilc on SIE faultsDavid Hildenbrand
On SIE faults, the ilc cannot be detected automatically, as the icptcode is 0. The ilc indicated in the program irq will always be 0. Therefore we have to manually specify the ilc in order to tell the guest which ilen was used when forwarding the PSW. Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2016-02-10KVM: s390: irq delivery should not rely on icptcodeDavid Hildenbrand
Program irq injection during program irq intercepts is the last candidates that injects nullifying irqs and relies on delivery to do the right thing. As we should not rely on the icptcode during any delivery (because that value will not be migrated), let's add a flag, telling prog IRQ delivery to not rewind the PSW in case of nullifying prog IRQs. Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2016-02-10KVM: s390: clean up prog irq injection on prog irq icptsDavid Hildenbrand
__extract_prog_irq() is used only once for getting the program check data in one place. Let's combine it with an injection function to avoid a memset and to prevent misuse on injection by simplifying the interface to only have the VCPU as parameter. Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2016-02-10KVM: s390: read the correct opcode on SIE faultsDavid Hildenbrand
Let's use our fresh new function read_guest_instr() to access guest storage via the correct addressing schema. Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2016-02-10KVM: s390: gaccess: implement instruction fetching modeDavid Hildenbrand
When an instruction is to be fetched, special handling applies to secondary-space mode and access-register mode. The instruction is to be fetched from primary space. We can easily support this by selecting the right asce for translation. Access registers will never be used during translation, so don't include them in the interface. As we only want to read from the current PSW address for now, let's also hide that detail. Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2016-02-10KVM: s390: gaccess: introduce access modesDavid Hildenbrand
We will need special handling when fetching instructions, so let's introduce new guest access modes GACC_FETCH and GACC_STORE instead of a write flag. An additional patch will then introduce GACC_IFETCH. Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2016-02-10KVM: s390: migration / injection of prog irq ilcDavid Hildenbrand
We have to migrate the program irq ilc and someday we will have to specify the ilc without KVM trying to autodetect the value. Let's reuse one of the spare fields in our program irq that should always be set to 0 by user space. Because we also want to make use of 0 ilcs ("not available"), we need a validity indicator. If no valid ilc is given, we try to autodetect the ilc via the current icptcode and icptstatus + parameter and store the valid ilc in the irq structure. This has a nice effect: QEMU's making use of KVM_S390_IRQ / KVM_S390_SET_IRQ_STATE / KVM_S390_GET_IRQ_STATE for migration will directly migrate the ilc without any changes. Please note that we use bit 0 as validity and bit 1,2 for the ilc, so by applying the ilc mask we directly get the ilen which is usually what we work with. Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2016-02-10KVM: s390: PSW forwarding / rewinding / ilc reworkDavid Hildenbrand
We have some confusion about ilc vs. ilen in our current code. So let's correctly use the term ilen when dealing with (ilc << 1). Program irq injection didn't take care of the correct ilc in case of irqs triggered by EXECUTE functions, let's provide one function kvm_s390_get_ilen() to take care of all that. Also, manually specifying in intercept handlers the size of the instruction (and sometimes overwriting that value for EXECUTE internally) doesn't make too much sense. So also provide the functions: - kvm_s390_retry_instr to retry the currently intercepted instruction - kvm_s390_rewind_psw to rewind the PSW without internal overwrites - kvm_s390_forward_psw to forward the PSW Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2016-02-10KVM: s390: sync of fp registers via kvm_runDavid Hildenbrand
As we already store the floating point registers in the vector save area in floating point register format when we don't have MACHINE_HAS_VX, we can directly expose them to user space using a new sync flag. The floating point registers will be valid when KVM_SYNC_FPRS is set. The fpc will also be valid when KVM_SYNC_FPRS is set. Either KVM_SYNC_FPRS or KVM_SYNC_VRS will be enabled, never both. Let's also change two positions where we access vrs, making the code easier to read and one comment superfluous. Suggested-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2016-02-10KVM: s390: allow sync of fp registers via vregsDavid Hildenbrand
If we have MACHINE_HAS_VX, the floating point registers are stored in the vector register format, event if the guest isn't enabled for vector registers. So we can allow KVM_SYNC_VRS as soon as MACHINE_HAS_VX is available. This can in return be used by user space to support floating point registers via struct kvm_run when the machine has vector registers. Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2016-02-09KVM: x86: consolidate different ways to test for in-kernel LAPICPaolo Bonzini
Different pieces of code checked for vcpu->arch.apic being (non-)NULL, or used kvm_vcpu_has_lapic (more optimized) or lapic_in_kernel. Replace everything with lapic_in_kernel's name and kvm_vcpu_has_lapic's implementation. Reviewed-by: Radim Krčmář <rkrcmar@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-02-09KVM: x86: consolidate "has lapic" checks into irq.cPaolo Bonzini
Do for kvm_cpu_has_pending_timer and kvm_inject_pending_timer_irqs what the other irq.c routines have been doing. Reviewed-by: Radim Krčmář <rkrcmar@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-02-09KVM: APIC: remove unnecessary double checks on APIC existencePaolo Bonzini
Usually the in-kernel APIC's existence is checked in the caller. Do not bother checking it again in lapic.c. Reviewed-by: Radim Krčmář <rkrcmar@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-02-09KVM/VMX: Add host irq information in trace event when updating IRTE for ↵Feng Wu
posted interrupts Add host irq information in trace event, so we can better understand which irq is in posted mode. Signed-off-by: Feng Wu <feng.wu@intel.com> Reviewed-by: Radim Krcmar <rkrcmar@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-02-09KVM: x86: Add lowest-priority support for vt-d posted-interruptsFeng Wu
Use vector-hashing to deliver lowest-priority interrupts for VT-d posted-interrupts. This patch extends kvm_intr_is_single_vcpu() to support lowest-priority handling. Signed-off-by: Feng Wu <feng.wu@intel.com> Reviewed-by: Radim Krčmář <rkrcmar@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-02-09KVM: x86: Use vector-hashing to deliver lowest-priority interruptsFeng Wu
Use vector-hashing to deliver lowest-priority interrupts, As an example, modern Intel CPUs in server platform use this method to handle lowest-priority interrupts. Signed-off-by: Feng Wu <feng.wu@intel.com> Reviewed-by: Radim Krčmář <rkrcmar@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-02-09KVM: Recover IRTE to remapped mode if the interrupt is not single-destinationFeng Wu
When the interrupt is not single destination any more, we need to change back IRTE to remapped mode explicitly. Signed-off-by: Feng Wu <feng.wu@intel.com> Reviewed-by: Radim Krčmář <rkrcmar@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-02-09KVM: x86: introduce do_shl32_div32Paolo Bonzini
This is similar to the existing div_frac function, but it returns the remainder too. Unlike div_frac, it can be used to implement long division, e.g. (a << 64) / b for 32-bit a and b. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-02-08Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
Pull KVM fixes from Paolo Bonzini: "KVM-ARM fixes, mostly coming from the PMU work" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: arm64: KVM: Fix guest dead loop when register accessor returns false arm64: KVM: Fix comments of the CP handler arm64: KVM: Fix wrong use of the CPSR MODE mask for 32bit guests arm64: KVM: Obey RES0/1 reserved bits when setting CPTR_EL2 arm64: KVM: Fix AArch64 guest userspace exception injection
2016-02-08Merge tag 'regmap-fix-v4.5-big-endian' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap Pull regmap fix from Mark Brown: "A single revert back to v4.4 endianness handling. Commit 29bb45f25ff3 ("regmap-mmio: Use native endianness for read/write") attempted to fix some long standing bugs in the MMIO implementation for big endian systems caused by duplicate byte swapping in both regmap and readl()/writel(). Sadly the fix makes things worse rather than better, so revert it for now" * tag 'regmap-fix-v4.5-big-endian' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap: regmap: mmio: Revert to v4.4 endianness handling
2016-02-08scatterlist: fix a typo in comment block of sg_miter_stop()Masahiro Yamada
Fix the doubled "started" and tidy up the following sentences. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-02-08Merge tag 'kvm-arm-for-4.5-rc2' of ↵Paolo Bonzini
git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into kvm-master KVM/ARM fixes for v4.5-rc2 A few random fixes, mostly coming from the PMU work by Shannon: - fix for injecting faults coming from the guest's userspace - cleanup for our CPTR_EL2 accessors (reserved bits) - fix for a bug impacting perf (user/kernel discrimination) - fix for a 32bit sysreg handling bug
2016-02-07Linux 4.5-rc3Linus Torvalds
2016-02-07Merge tag 'armsoc-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC fixes from Olof Johansson: "The first real batch of fixes for this release cycle, so there are a few more than usual. Most of these are fixes and tweaks to board support (DT bugfixes, etc). I've also picked up a couple of small cleanups that seemed innocent enough that there was little reason to wait (const/ __initconst and Kconfig deps). Quite a bit of the changes on OMAP were due to fixes to no longer write to rodata from assembly when ARM_KERNMEM_PERMS was enabled, but there were also other fixes. Kirkwood had a bunch of gpio fixes for some boards. OMAP had RTC fixes on OMAP5, and Nomadik had changes to MMC parameters in DT. All in all, mostly the usual mix of various fixes" * tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (46 commits) ARM: multi_v7_defconfig: enable DW_WATCHDOG ARM: nomadik: fix up SD/MMC DT settings ARM64: tegra: Add chosen node for tegra132 norrin ARM: realview: use "depends on" instead of "if" after prompt ARM: tango: use "depends on" instead of "if" after prompt ARM: tango: use const and __initconst for smp_operations ARM: realview: use const and __initconst for smp_operations bus: uniphier-system-bus: revive tristate prompt arm64: dts: Add missing DMA Abort interrupt to Juno bus: vexpress-config: Add missing of_node_put ARM: dts: am57xx: sbc-am57x: correct Eth PHY settings ARM: dts: am57xx: cl-som-am57x: fix CPSW EMAC pinmux ARM: dts: am57xx: sbc-am57x: fix UART3 pinmux ARM: dts: am57xx: cl-som-am57x: update SPI Flash frequency ARM: dts: am57xx: cl-som-am57x: set HOST mode for USB2 ARM: dts: am57xx: sbc-am57x: fix SB-SOM EEPROM I2C address ARM: dts: LogicPD Torpedo: Revert Duplicative Entries ARM: dts: am437x: pixcir_tangoc: use correct flags for irq types ARM: dts: am4372: fix irq type for arm twd and global timer ARM: dts: at91: sama5d4 xplained: fix phy0 IRQ type ...
2016-02-07Merge branch 'mailbox-devel' of ↵Linus Torvalds
git://git.linaro.org/landing-teams/working/fujitsu/integration Pull mailbox fixes from Jassi Brar: - fix getting element from the pcc-channels array by simply indexing into it - prevent building mailbox-test driver for archs that don't have IOMEM * 'mailbox-devel' of git://git.linaro.org/landing-teams/working/fujitsu/integration: mailbox: Fix dependencies for !HAS_IOMEM archs mailbox: pcc: fix channel calculation in get_pcc_channel()
generated by cgit (git 2.34.1) at 2025-06-11 22:35:30 +0000