- 16 6月, 2017 1 次提交
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由 Paul Mackerras 提交于
At present, HV KVM on POWER8 and POWER9 machines loses any instruction or data breakpoint set in the host whenever a guest is run. Instruction breakpoints are currently only used by xmon, but ptrace and the perf_event subsystem can set data breakpoints as well as xmon. To fix this, we save the host values of the debug registers (CIABR, DAWR and DAWRX) before entering the guest and restore them on exit. To provide space to save them in the stack frame, we expand the stack frame allocated by kvmppc_hv_entry() from 112 to 144 bytes. Fixes: b005255e ("KVM: PPC: Book3S HV: Context-switch new POWER8 SPRs", 2014-01-08) Cc: stable@vger.kernel.org # v3.14+ Signed-off-by: NPaul Mackerras <paulus@ozlabs.org>
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- 15 6月, 2017 2 次提交
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由 Paul Mackerras 提交于
If userspace attempts to call the KVM_RUN ioctl when it has hardware transactional memory (HTM) enabled, the values that it has put in the HTM-related SPRs TFHAR, TFIAR and TEXASR will get overwritten by guest values. To fix this, we detect this condition and save those SPR values in the thread struct, and disable HTM for the task. If userspace goes to access those SPRs or the HTM facility in future, a TM-unavailable interrupt will occur and the handler will reload those SPRs and re-enable HTM. If userspace has started a transaction and suspended it, we would currently lose the transactional state in the guest entry path and would almost certainly get a "TM Bad Thing" interrupt, which would cause the host to crash. To avoid this, we detect this case and return from the KVM_RUN ioctl with an EINVAL error, with the KVM exit reason set to KVM_EXIT_FAIL_ENTRY. Fixes: b005255e ("KVM: PPC: Book3S HV: Context-switch new POWER8 SPRs", 2014-01-08) Cc: stable@vger.kernel.org # v3.14+ Signed-off-by: NPaul Mackerras <paulus@ozlabs.org>
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由 Paul Mackerras 提交于
This restores several special-purpose registers (SPRs) to sane values on guest exit that were missed before. TAR and VRSAVE are readable and writable by userspace, and we need to save and restore them to prevent the guest from potentially affecting userspace execution (not that TAR or VRSAVE are used by any known program that run uses the KVM_RUN ioctl). We save/restore these in kvmppc_vcpu_run_hv() rather than on every guest entry/exit. FSCR affects userspace execution in that it can prohibit access to certain facilities by userspace. We restore it to the normal value for the task on exit from the KVM_RUN ioctl. IAMR is normally 0, and is restored to 0 on guest exit. However, with a radix host on POWER9, it is set to a value that prevents the kernel from executing user-accessible memory. On POWER9, we save IAMR on guest entry and restore it on guest exit to the saved value rather than 0. On POWER8 we continue to set it to 0 on guest exit. PSPB is normally 0. We restore it to 0 on guest exit to prevent userspace taking advantage of the guest having set it non-zero (which would allow userspace to set its SMT priority to high). UAMOR is normally 0. We restore it to 0 on guest exit to prevent the AMR from being used as a covert channel between userspace processes, since the AMR is not context-switched at present. Fixes: b005255e ("KVM: PPC: Book3S HV: Context-switch new POWER8 SPRs", 2014-01-08) Cc: stable@vger.kernel.org # v3.14+ Signed-off-by: NPaul Mackerras <paulus@ozlabs.org>
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- 13 6月, 2017 1 次提交
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由 Paul Mackerras 提交于
This adds code to save the values of three SPRs (special-purpose registers) used by userspace to control event-based branches (EBBs), which are essentially interrupts that get delivered directly to userspace. These registers are loaded up with guest values when entering the guest, and their values are saved when exiting the guest, but we were not saving the host values and restoring them before going back to userspace. On POWER8 this would only affect userspace programs which explicitly request the use of EBBs and also use the KVM_RUN ioctl, since the only source of EBBs on POWER8 is the PMU, and there is an explicit enable bit in the PMU registers (and those PMU registers do get properly context-switched between host and guest). On POWER9 there is provision for externally-generated EBBs, and these are not subject to the control in the PMU registers. Since these registers only affect userspace, we can save them when we first come in from userspace and restore them before returning to userspace, rather than saving/restoring the host values on every guest entry/exit. Similarly, we don't need to worry about their values on offline secondary threads since they execute in the context of the idle task, which never executes in userspace. Fixes: b005255e ("KVM: PPC: Book3S HV: Context-switch new POWER8 SPRs", 2014-01-08) Cc: stable@vger.kernel.org # v3.14+ Signed-off-by: NPaul Mackerras <paulus@ozlabs.org>
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- 29 5月, 2017 1 次提交
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由 Paul Mackerras 提交于
POWER9 introduces a new mode for the decrementer register, called large decrementer mode, in which the decrementer counter is 56 bits wide rather than 32, and reads are sign-extended rather than zero-extended. For the decrementer, this new mode is optional and controlled by a bit in the LPCR. The hypervisor decrementer (HDEC) is 56 bits wide on POWER9 and has no mode control. Since KVM code reads and writes the decrementer and hypervisor decrementer registers in a few places, it needs to be aware of the need to treat the decrementer value as a 64-bit quantity, and only do a 32-bit sign extension when large decrementer mode is not in effect. Similarly, the HDEC should always be treated as a 64-bit quantity on POWER9. We define a new EXTEND_HDEC macro to encapsulate the feature test for POWER9 and the sign extension. To enable the sign extension to be removed in large decrementer mode, we test the LPCR_LD bit in the host LPCR image stored in the struct kvm for the guest. If is set then large decrementer mode is enabled and the sign extension should be skipped. This is partly based on an earlier patch by Oliver O'Halloran. Cc: stable@vger.kernel.org # v4.10+ Signed-off-by: NPaul Mackerras <paulus@ozlabs.org>
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- 12 5月, 2017 3 次提交
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由 Paul Mackerras 提交于
Commit e91aa8e6 ("KVM: PPC: Enable IOMMU_API for KVM_BOOK3S_64 permanently", 2017-03-22) enabled the SPAPR TCE code for all 64-bit Book 3S kernel configurations in order to simplify the code and reduce #ifdefs. However, 64-bit Book 3S PPC platforms other than pseries and powernv don't implement the necessary IOMMU callbacks, leading to build failures like the following (for a pasemi config): scripts/kconfig/conf --silentoldconfig Kconfig warning: (KVM_BOOK3S_64) selects SPAPR_TCE_IOMMU which has unmet direct dependencies (IOMMU_SUPPORT && (PPC_POWERNV || PPC_PSERIES)) ... CC [M] arch/powerpc/kvm/book3s_64_vio.o /home/paulus/kernel/kvm/arch/powerpc/kvm/book3s_64_vio.c: In function ‘kvmppc_clear_tce’: /home/paulus/kernel/kvm/arch/powerpc/kvm/book3s_64_vio.c:363:2: error: implicit declaration of function ‘iommu_tce_xchg’ [-Werror=implicit-function-declaration] iommu_tce_xchg(tbl, entry, &hpa, &dir); ^ To fix this, we make the inclusion of the SPAPR TCE support, and the code that uses it in book3s_vio.c and book3s_vio_hv.c, depend on the inclusion of support for the pseries and/or powernv platforms. This means that when running a 'pseries' guest on those platforms, the guest won't have in-kernel acceleration of the PAPR TCE hypercalls, but at least now they compile. Reviewed-by: NAlexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: NPaul Mackerras <paulus@ozlabs.org>
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由 Paul Mackerras 提交于
The PR KVM implementation of the PAPR HPT hypercalls (H_ENTER etc.) access an image of the HPT in userspace memory using copy_from_user and copy_to_user. Recently, the declarations of those functions were annotated to indicate that the return value must be checked. Since this code doesn't currently check the return value, this causes compile warnings like the ones shown below, and since on PPC the default is to compile arch/powerpc with -Werror, this causes the build to fail. To fix this, we check the return values, and if non-zero, fail the hypercall being processed with a H_FUNCTION error return value. There is really no good error return value to use since PAPR didn't envisage the possibility that the hypervisor may not be able to access the guest's HPT, and H_FUNCTION (function not supported) seems as good as any. The typical compile warnings look like this: CC arch/powerpc/kvm/book3s_pr_papr.o /home/paulus/kernel/kvm/arch/powerpc/kvm/book3s_pr_papr.c: In function ‘kvmppc_h_pr_enter’: /home/paulus/kernel/kvm/arch/powerpc/kvm/book3s_pr_papr.c:53:2: error: ignoring return value of ‘copy_from_user’, declared with attribute warn_unused_result [-Werror=unused-result] copy_from_user(pteg, (void __user *)pteg_addr, sizeof(pteg)); ^ /home/paulus/kernel/kvm/arch/powerpc/kvm/book3s_pr_papr.c:74:2: error: ignoring return value of ‘copy_to_user’, declared with attribute warn_unused_result [-Werror=unused-result] copy_to_user((void __user *)pteg_addr, hpte, HPTE_SIZE); ^ ... etc. Signed-off-by: NPaul Mackerras <paulus@ozlabs.org>
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由 Paul Mackerras 提交于
POWER9 running a radix guest will take some hypervisor interrupts without going to real mode (turning off the MMU). This means that early hypercall handlers may now be called in virtual mode. Most of the handlers work just fine in both modes, but there are some that can crash the host if called in virtual mode, notably the TCE (IOMMU) hypercalls H_PUT_TCE, H_STUFF_TCE and H_PUT_TCE_INDIRECT. These already have both a real-mode and a virtual-mode version, so we arrange for the real-mode version to return H_TOO_HARD for radix guests, which will result in the virtual-mode version being called. The other hypercall which is sensitive to the MMU mode is H_RANDOM. It doesn't have a virtual-mode version, so this adds code to enable it to be called in either mode. An alternative solution was considered which would refuse to call any of the early hypercall handlers when doing a virtual-mode exit from a radix guest. However, the XICS-on-XIVE code depends on the XICS hypercalls being handled early even for virtual-mode exits, because the handlers need to be called before the XIVE vCPU state has been pulled off the hardware. Therefore that solution would have become quite invasive and complicated, and was rejected in favour of the simpler, though less elegant, solution presented here. Reviewed-by: NDavid Gibson <david@gibson.dropbear.id.au> Tested-by: NDavid Gibson <david@gibson.dropbear.id.au> Signed-off-by: NPaul Mackerras <paulus@ozlabs.org>
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- 28 4月, 2017 1 次提交
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由 Denis Kirjanov 提交于
With CONFIG_DEBUG_PREEMPT, get_paca() produces the following warning in kvmppc_book3s_init_hv() since it calls debug_smp_processor_id(). There is no real issue with the xics_phys field. If paca->kvm_hstate.xics_phys is non-zero on one cpu, it will be non-zero on them all. Therefore this is not fixing any actual problem, just the warning. [ 138.521188] BUG: using smp_processor_id() in preemptible [00000000] code: modprobe/5596 [ 138.521308] caller is .kvmppc_book3s_init_hv+0x184/0x350 [kvm_hv] [ 138.521404] CPU: 5 PID: 5596 Comm: modprobe Not tainted 4.11.0-rc3-00022-gc7e790c5 #1 [ 138.521509] Call Trace: [ 138.521563] [c0000007d018b810] [c0000000023eef10] .dump_stack+0xe4/0x150 (unreliable) [ 138.521694] [c0000007d018b8a0] [c000000001f6ec04] .check_preemption_disabled+0x134/0x150 [ 138.521829] [c0000007d018b940] [d00000000a010274] .kvmppc_book3s_init_hv+0x184/0x350 [kvm_hv] [ 138.521963] [c0000007d018ba00] [c00000000191d5cc] .do_one_initcall+0x5c/0x1c0 [ 138.522082] [c0000007d018bad0] [c0000000023e9494] .do_init_module+0x84/0x240 [ 138.522201] [c0000007d018bb70] [c000000001aade18] .load_module+0x1f68/0x2a10 [ 138.522319] [c0000007d018bd20] [c000000001aaeb30] .SyS_finit_module+0xc0/0xf0 [ 138.522439] [c0000007d018be30] [c00000000191baec] system_call+0x38/0xfc Signed-off-by: NDenis Kirjanov <kda@linux-powerpc.org> Signed-off-by: NPaul Mackerras <paulus@ozlabs.org>
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- 27 4月, 2017 2 次提交
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由 Radim Krčmář 提交于
Users were expected to use kvm_check_request() for testing and clearing, but request have expanded their use since then and some users want to only test or do a faster clear. Make sure that requests are not directly accessed with bit operations. Reviewed-by: NChristian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: NRadim Krčmář <rkrcmar@redhat.com> Reviewed-by: NAndrew Jones <drjones@redhat.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 Benjamin Herrenschmidt 提交于
This patch makes KVM capable of using the XIVE interrupt controller to provide the standard PAPR "XICS" style hypercalls. It is necessary for proper operations when the host uses XIVE natively. This has been lightly tested on an actual system, including PCI pass-through with a TG3 device. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> [mpe: Cleanup pr_xxx(), unsplit pr_xxx() strings, etc., fix build failures by adding KVM_XIVE which depends on KVM_XICS and XIVE, and adding empty stubs for the kvm_xive_xxx() routines, fixup subject, integrate fixes from Paul for building PR=y HV=n] Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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- 20 4月, 2017 17 次提交
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由 Thomas Huth 提交于
According to the PowerISA 2.07, mtspr and mfspr should not always generate an illegal instruction exception when being used with an undefined SPR, but rather treat the instruction as a NOP or inject a privilege exception in some cases, too - depending on the SPR number. Also turn the printk here into a ratelimited print statement, so that the guest can not flood the dmesg log of the host by issueing lots of illegal mtspr/mfspr instruction here. Signed-off-by: NThomas Huth <thuth@redhat.com> Signed-off-by: NPaul Mackerras <paulus@ozlabs.org>
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由 Alexey Kardashevskiy 提交于
This allows the host kernel to handle H_PUT_TCE, H_PUT_TCE_INDIRECT and H_STUFF_TCE requests targeted an IOMMU TCE table used for VFIO without passing them to user space which saves time on switching to user space and back. This adds H_PUT_TCE/H_PUT_TCE_INDIRECT/H_STUFF_TCE handlers to KVM. KVM tries to handle a TCE request in the real mode, if failed it passes the request to the virtual mode to complete the operation. If it a virtual mode handler fails, the request is passed to the user space; this is not expected to happen though. To avoid dealing with page use counters (which is tricky in real mode), this only accelerates SPAPR TCE IOMMU v2 clients which are required to pre-register the userspace memory. The very first TCE request will be handled in the VFIO SPAPR TCE driver anyway as the userspace view of the TCE table (iommu_table::it_userspace) is not allocated till the very first mapping happens and we cannot call vmalloc in real mode. If we fail to update a hardware IOMMU table unexpected reason, we just clear it and move on as there is nothing really we can do about it - for example, if we hot plug a VFIO device to a guest, existing TCE tables will be mirrored automatically to the hardware and there is no interface to report to the guest about possible failures. This adds new attribute - KVM_DEV_VFIO_GROUP_SET_SPAPR_TCE - to the VFIO KVM device. It takes a VFIO group fd and SPAPR TCE table fd and associates a physical IOMMU table with the SPAPR TCE table (which is a guest view of the hardware IOMMU table). The iommu_table object is cached and referenced so we do not have to look up for it in real mode. This does not implement the UNSET counterpart as there is no use for it - once the acceleration is enabled, the existing userspace won't disable it unless a VFIO container is destroyed; this adds necessary cleanup to the KVM_DEV_VFIO_GROUP_DEL handler. This advertises the new KVM_CAP_SPAPR_TCE_VFIO capability to the user space. This adds real mode version of WARN_ON_ONCE() as the generic version causes problems with rcu_sched. Since we testing what vmalloc_to_phys() returns in the code, this also adds a check for already existing vmalloc_to_phys() call in kvmppc_rm_h_put_tce_indirect(). This finally makes use of vfio_external_user_iommu_id() which was introduced quite some time ago and was considered for removal. Tests show that this patch increases transmission speed from 220MB/s to 750..1020MB/s on 10Gb network (Chelsea CXGB3 10Gb ethernet card). Signed-off-by: NAlexey Kardashevskiy <aik@ozlabs.ru> Acked-by: NAlex Williamson <alex.williamson@redhat.com> Reviewed-by: NDavid Gibson <david@gibson.dropbear.id.au> Signed-off-by: NPaul Mackerras <paulus@ozlabs.org>
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由 Alexey Kardashevskiy 提交于
This reworks helpers for checking TCE update parameters in way they can be used in KVM. This should cause no behavioral change. Signed-off-by: NAlexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: NDavid Gibson <david@gibson.dropbear.id.au> Acked-by: NMichael Ellerman <mpe@ellerman.id.au> Signed-off-by: NPaul Mackerras <paulus@ozlabs.org>
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由 Alexey Kardashevskiy 提交于
VFIO on sPAPR already implements guest memory pre-registration when the entire guest RAM gets pinned. This can be used to translate the physical address of a guest page containing the TCE list from H_PUT_TCE_INDIRECT. This makes use of the pre-registrered memory API to access TCE list pages in order to avoid unnecessary locking on the KVM memory reverse map as we know that all of guest memory is pinned and we have a flat array mapping GPA to HPA which makes it simpler and quicker to index into that array (even with looking up the kernel page tables in vmalloc_to_phys) than it is to find the memslot, lock the rmap entry, look up the user page tables, and unlock the rmap entry. Note that the rmap pointer is initialized to NULL where declared (not in this patch). If a requested chunk of memory has not been preregistered, this will fall back to non-preregistered case and lock rmap. Signed-off-by: NAlexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: NDavid Gibson <david@gibson.dropbear.id.au> Signed-off-by: NPaul Mackerras <paulus@ozlabs.org>
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由 Alexey Kardashevskiy 提交于
The guest view TCE tables are per KVM anyway (not per VCPU) so pass kvm* there. This will be used in the following patches where we will be attaching VFIO containers to LIOBNs via ioctl() to KVM (rather than to VCPU). Signed-off-by: NAlexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: NDavid Gibson <david@gibson.dropbear.id.au> Signed-off-by: NPaul Mackerras <paulus@ozlabs.org>
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由 Alexey Kardashevskiy 提交于
It does not make much sense to have KVM in book3s-64 and not to have IOMMU bits for PCI pass through support as it costs little and allows VFIO to function on book3s KVM. Having IOMMU_API always enabled makes it unnecessary to have a lot of "#ifdef IOMMU_API" in arch/powerpc/kvm/book3s_64_vio*. With those ifdef's we could have only user space emulated devices accelerated (but not VFIO) which do not seem to be very useful. Signed-off-by: NAlexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: NDavid Gibson <david@gibson.dropbear.id.au> Signed-off-by: NPaul Mackerras <paulus@ozlabs.org>
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由 Alexey Kardashevskiy 提交于
At the moment the userspace can request a table smaller than a page size and this value will be stored as kvmppc_spapr_tce_table::size. However the actual allocated size will still be aligned to the system page size as alloc_page() is used there. This aligns the table size up to the system page size. It should not change the existing behaviour but when in-kernel TCE acceleration patchset reaches the upstream kernel, this will allow small TCE tables be accelerated as well: PCI IODA iommu_table allocator already aligns the size and, without this patch, an IOMMU group won't attach to LIOBN due to the mismatching table size. Reviewed-by: NDavid Gibson <david@gibson.dropbear.id.au> Signed-off-by: NAlexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: NPaul Mackerras <paulus@ozlabs.org>
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由 Alexey Kardashevskiy 提交于
PR KVM page fault handler performs eaddr to pte translation for a guest, however kvmppc_mmu_book3s_64_xlate() does not preserve WIMG bits (storage control) in the kvmppc_pte struct. If PR KVM is running as a second level guest under HV KVM, and PR KVM tries inserting HPT entry, this fails in HV KVM if it already has this mapping. This preserves WIMG bits between kvmppc_mmu_book3s_64_xlate() and kvmppc_mmu_map_page(). Signed-off-by: NAlexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: NDavid Gibson <david@gibson.dropbear.id.au> Signed-off-by: NPaul Mackerras <paulus@ozlabs.org>
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由 Alexey Kardashevskiy 提交于
At the moment kvmppc_mmu_map_page() returns -1 if mmu_hash_ops.hpte_insert() fails for any reason so the page fault handler resumes the guest and it faults on the same address again. This adds distinction to kvmppc_mmu_map_page() to return -EIO if mmu_hash_ops.hpte_insert() failed for a reason other than full pteg. At the moment only pSeries_lpar_hpte_insert() returns -2 if plpar_pte_enter() failed with a code other than H_PTEG_FULL. Other mmu_hash_ops.hpte_insert() instances can only fail with -1 "full pteg". With this change, if PR KVM fails to update HPT, it can signal the userspace about this instead of returning to guest and having the very same page fault over and over again. Signed-off-by: NAlexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: NDavid Gibson <david@gibson.dropbear.id.au> Signed-off-by: NPaul Mackerras <paulus@ozlabs.org>
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由 Alexey Kardashevskiy 提交于
@is_mmio has never been used since introduction in commit 2f4cf5e4 ("Add book3s.c") from 2009. Signed-off-by: NAlexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: NPaul Mackerras <paulus@ozlabs.org>
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由 Markus Elfring 提交于
* A multiplication for the size determination of a memory allocation indicated that an array data structure should be processed. Thus use the corresponding function "kcalloc". This issue was detected by using the Coccinelle software. * Replace the specification of a data type by a pointer dereference to make the corresponding size determination a bit safer according to the Linux coding style convention. Signed-off-by: NMarkus Elfring <elfring@users.sourceforge.net> Signed-off-by: NPaul Mackerras <paulus@ozlabs.org>
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由 Markus Elfring 提交于
Add a jump target so that a bit of exception handling can be better reused at the end of this function. Signed-off-by: NMarkus Elfring <elfring@users.sourceforge.net> Signed-off-by: NPaul Mackerras <paulus@ozlabs.org>
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由 Paul Mackerras 提交于
For completeness, this adds emulation of the lfiwax and lfiwzx instructions. With this, all floating-point load and store instructions as of Power ISA V2.07 are emulated. Signed-off-by: NPaul Mackerras <paulus@ozlabs.org>
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由 Paul Mackerras 提交于
This adds emulation for the following integer loads and stores, thus enabling them to be used in a guest for accessing emulated MMIO locations. - lhaux - lwaux - lwzux - ldu - lwa - stdux - stwux - stdu - ldbrx - stdbrx Previously, most of these would cause an emulation failure exit to userspace, though ldu and lwa got treated incorrectly as ld, and stdu got treated incorrectly as std. This also tidies up some of the formatting and updates the comment listing instructions that still need to be implemented. With this, all integer loads and stores that are defined in the Power ISA v2.07 are emulated, except for those that are permitted to trap when used on cache-inhibited or write-through mappings (and which do in fact trap on POWER8), that is, lmw/stmw, lswi/stswi, lswx/stswx, lq/stq, and l[bhwdq]arx/st[bhwdq]cx. Signed-off-by: NPaul Mackerras <paulus@ozlabs.org>
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由 Alexey Kardashevskiy 提交于
This adds missing stdx emulation for emulated MMIO accesses by KVM guests. This allows the Mellanox mlx5_core driver from recent kernels to work when MMIO emulation is enforced by userspace. Signed-off-by: NAlexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: NPaul Mackerras <paulus@ozlabs.org>
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由 Bin Lu 提交于
This patch provides the MMIO load/store emulation for instructions of 'double & vector unsigned char & vector signed char & vector unsigned short & vector signed short & vector unsigned int & vector signed int & vector double '. The instructions that this adds emulation for are: - ldx, ldux, lwax, - lfs, lfsx, lfsu, lfsux, lfd, lfdx, lfdu, lfdux, - stfs, stfsx, stfsu, stfsux, stfd, stfdx, stfdu, stfdux, stfiwx, - lxsdx, lxsspx, lxsiwax, lxsiwzx, lxvd2x, lxvw4x, lxvdsx, - stxsdx, stxsspx, stxsiwx, stxvd2x, stxvw4x [paulus@ozlabs.org - some cleanups, fixes and rework, make it compile for Book E, fix build when PR KVM is built in] Signed-off-by: NBin Lu <lblulb@linux.vnet.ibm.com> Signed-off-by: NPaul Mackerras <paulus@ozlabs.org>
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由 Paul Mackerras 提交于
This provides functions that can be used for generating interrupts indicating that a given functional unit (floating point, vector, or VSX) is unavailable. These functions will be used in instruction emulation code. Signed-off-by: NPaul Mackerras <paulus@ozlabs.org>
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- 19 4月, 2017 1 次提交
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由 Laura Abbott 提交于
Frameworks that may want to enumerate CMA heaps (e.g. Ion) will find it useful to have an explicit name attached to each region. Store the name in each CMA structure. Signed-off-by: NLaura Abbott <labbott@redhat.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 11 4月, 2017 2 次提交
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由 Michael Ellerman 提交于
These files don't seem to have any need for asm/debug.h, now that all it includes are the debugger hooks and breakpoint definitions. Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Michael Ellerman 提交于
powerpc_debugfs_root is the dentry representing the root of the "powerpc" directory tree in debugfs. Currently it sits in asm/debug.h, a long with some other things that have "debug" in the name, but are otherwise unrelated. Pull it out into a separate header, which also includes linux/debugfs.h, and convert all the users to include debugfs.h instead of debug.h. Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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- 10 4月, 2017 4 次提交
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由 Benjamin Herrenschmidt 提交于
We have all sort of variants of MMIO accessors for the real mode instructions. This creates a clean set of accessors based on Linux normal naming conventions, replacing all occurrences of the old ones in the tree. I have purposefully removed the "out/in" variants in favor of only including __raw variants. Any code using these is already pretty much hand tuned to operate in a very specific environment. I've fixed up the 2 users (only one of them actually needed a barrier in the first place). Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Benjamin Herrenschmidt 提交于
It's only used within the same file it's defined Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Benjamin Herrenschmidt 提交于
We traditionally have linux/ before asm/ Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Benjamin Herrenschmidt 提交于
The XIVE interrupt controller is the new interrupt controller found in POWER9. It supports advanced virtualization capabilities among other things. Currently we use a set of firmware calls that simulate the old "XICS" interrupt controller but this is fairly inefficient. This adds the framework for using XIVE along with a native backend which OPAL for configuration. Later, a backend allowing the use in a KVM or PowerVM guest will also be provided. This disables some fast path for interrupts in KVM when XIVE is enabled as these rely on the firmware emulation code which is no longer available when the XIVE is used natively by Linux. A latter patch will make KVM also directly exploit the XIVE, thus recovering the lost performance (and more). Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> [mpe: Fixup pr_xxx("XIVE:"...), don't split pr_xxx() strings, tweak Kconfig so XIVE_NATIVE selects XIVE and depends on POWERNV, fix build errors when SMP=n, fold in fixes from Ben: Don't call cpu_online() on an invalid CPU number Fix irq target selection returning out of bounds cpu# Extra sanity checks on cpu numbers ] Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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- 07 4月, 2017 1 次提交
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由 Paolo Bonzini 提交于
Remove code from architecture files that can be moved to virt/kvm, since there is already common code for coalesced MMIO. Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com> Reviewed-by: NDavid Hildenbrand <david@redhat.com> [Removed a pointless 'break' after 'return'.] Signed-off-by: NRadim Krčmář <rkrcmar@redhat.com>
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- 06 4月, 2017 1 次提交
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由 Dan Carpenter 提交于
kzalloc() won't actually fail because sizeof(*resize) is small, but static checkers complain. Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com> Acked-by: NDavid Gibson <david@gibson.dropbear.id.au> Signed-off-by: NPaul Mackerras <paulus@ozlabs.org>
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- 31 3月, 2017 2 次提交
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由 Aneesh Kumar K.V 提交于
Inorder to support large effective address range (512TB), we want to increase the virtual address bits to 68. But we do have platforms like p4 and p5 that can only do 65 bit VA. We support those platforms by limiting context bits on them to 16. The protovsid -> vsid conversion is verified to work with both 65 and 68 bit va values. I also documented the restrictions in a table format as part of code comments. Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Michael Ellerman 提交于
KVM wants to be able to allocate an MMU context id, which it does currently by calling __init_new_context(). We're about to rework that code, so provide a wrapper for KVM so it can not worry about the details. Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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- 10 3月, 2017 1 次提交
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由 Aneesh Kumar K.V 提交于
We use pte_write() to check whethwer the pte entry is writable. This is mostly used to later mark the pte read only if it is writable. The other use of pte_write() is to check whether the pte_entry is writable so that hardware page table entry can be marked accordingly. This is used in kvm where we look at qemu page table entry and update hardware hash page table for the guest with correct write enable bit. With the above, for the first usage we should also check the savedwrite bit so that we can correctly clear the savedwite bit. For the later, we add a new variant __pte_write(). With this we can revert write_protect_page part of 595cd8f2 ("mm/ksm: handle protnone saved writes when making page write protect"). But I left it as it is as an example code for savedwrite check. Fixes: c137a275 ("powerpc/mm/autonuma: switch ppc64 to its own implementation of saved write") Link: http://lkml.kernel.org/r/1488203787-17849-2-git-send-email-aneesh.kumar@linux.vnet.ibm.comSigned-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Cc: Rik van Riel <riel@surriel.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Paul Mackerras <paulus@ozlabs.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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