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669 lines
17 KiB
669 lines
17 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* |
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* Copyright 2010 Paul Mackerras, IBM Corp. <[email protected]> |
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* Copyright 2011 David Gibson, IBM Corporation <[email protected]> |
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* Copyright 2016 Alexey Kardashevskiy, IBM Corporation <[email protected]> |
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*/ |
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|
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#include <linux/types.h> |
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#include <linux/string.h> |
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#include <linux/kvm.h> |
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#include <linux/kvm_host.h> |
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#include <linux/highmem.h> |
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#include <linux/gfp.h> |
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#include <linux/slab.h> |
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#include <linux/hugetlb.h> |
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#include <linux/list.h> |
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#include <linux/stringify.h> |
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#include <asm/kvm_ppc.h> |
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#include <asm/kvm_book3s.h> |
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#include <asm/book3s/64/mmu-hash.h> |
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#include <asm/mmu_context.h> |
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#include <asm/hvcall.h> |
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#include <asm/synch.h> |
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#include <asm/ppc-opcode.h> |
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#include <asm/udbg.h> |
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#include <asm/iommu.h> |
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#include <asm/tce.h> |
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#include <asm/pte-walk.h> |
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|
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#ifdef CONFIG_BUG |
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#define WARN_ON_ONCE_RM(condition) ({ \ |
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static bool __section(".data.unlikely") __warned; \ |
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int __ret_warn_once = !!(condition); \ |
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\ |
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if (unlikely(__ret_warn_once && !__warned)) { \ |
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__warned = true; \ |
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pr_err("WARN_ON_ONCE_RM: (%s) at %s:%u\n", \ |
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__stringify(condition), \ |
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__func__, __LINE__); \ |
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dump_stack(); \ |
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} \ |
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unlikely(__ret_warn_once); \ |
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}) |
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#else |
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#define WARN_ON_ONCE_RM(condition) ({ \ |
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int __ret_warn_on = !!(condition); \ |
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unlikely(__ret_warn_on); \ |
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}) |
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#endif |
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/* |
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* Finds a TCE table descriptor by LIOBN. |
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* |
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* WARNING: This will be called in real or virtual mode on HV KVM and virtual |
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* mode on PR KVM |
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*/ |
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struct kvmppc_spapr_tce_table *kvmppc_find_table(struct kvm *kvm, |
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unsigned long liobn) |
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{ |
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struct kvmppc_spapr_tce_table *stt; |
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list_for_each_entry_lockless(stt, &kvm->arch.spapr_tce_tables, list) |
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if (stt->liobn == liobn) |
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return stt; |
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return NULL; |
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} |
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EXPORT_SYMBOL_GPL(kvmppc_find_table); |
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|
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#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE |
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static long kvmppc_rm_tce_to_ua(struct kvm *kvm, |
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unsigned long tce, unsigned long *ua) |
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{ |
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unsigned long gfn = tce >> PAGE_SHIFT; |
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struct kvm_memory_slot *memslot; |
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memslot = search_memslots(kvm_memslots_raw(kvm), gfn); |
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if (!memslot) |
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return -EINVAL; |
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*ua = __gfn_to_hva_memslot(memslot, gfn) | |
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(tce & ~(PAGE_MASK | TCE_PCI_READ | TCE_PCI_WRITE)); |
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return 0; |
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} |
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/* |
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* Validates TCE address. |
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* At the moment flags and page mask are validated. |
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* As the host kernel does not access those addresses (just puts them |
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* to the table and user space is supposed to process them), we can skip |
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* checking other things (such as TCE is a guest RAM address or the page |
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* was actually allocated). |
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*/ |
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static long kvmppc_rm_tce_validate(struct kvmppc_spapr_tce_table *stt, |
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unsigned long tce) |
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{ |
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unsigned long gpa = tce & ~(TCE_PCI_READ | TCE_PCI_WRITE); |
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enum dma_data_direction dir = iommu_tce_direction(tce); |
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struct kvmppc_spapr_tce_iommu_table *stit; |
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unsigned long ua = 0; |
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|
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/* Allow userspace to poison TCE table */ |
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if (dir == DMA_NONE) |
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return H_SUCCESS; |
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if (iommu_tce_check_gpa(stt->page_shift, gpa)) |
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return H_PARAMETER; |
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if (kvmppc_rm_tce_to_ua(stt->kvm, tce, &ua)) |
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return H_TOO_HARD; |
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list_for_each_entry_lockless(stit, &stt->iommu_tables, next) { |
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unsigned long hpa = 0; |
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struct mm_iommu_table_group_mem_t *mem; |
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long shift = stit->tbl->it_page_shift; |
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mem = mm_iommu_lookup_rm(stt->kvm->mm, ua, 1ULL << shift); |
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if (!mem) |
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return H_TOO_HARD; |
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if (mm_iommu_ua_to_hpa_rm(mem, ua, shift, &hpa)) |
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return H_TOO_HARD; |
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} |
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return H_SUCCESS; |
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} |
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/* Note on the use of page_address() in real mode, |
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* |
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* It is safe to use page_address() in real mode on ppc64 because |
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* page_address() is always defined as lowmem_page_address() |
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* which returns __va(PFN_PHYS(page_to_pfn(page))) which is arithmetic |
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* operation and does not access page struct. |
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* |
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* Theoretically page_address() could be defined different |
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* but either WANT_PAGE_VIRTUAL or HASHED_PAGE_VIRTUAL |
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* would have to be enabled. |
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* WANT_PAGE_VIRTUAL is never enabled on ppc32/ppc64, |
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* HASHED_PAGE_VIRTUAL could be enabled for ppc32 only and only |
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* if CONFIG_HIGHMEM is defined. As CONFIG_SPARSEMEM_VMEMMAP |
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* is not expected to be enabled on ppc32, page_address() |
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* is safe for ppc32 as well. |
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* |
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* WARNING: This will be called in real-mode on HV KVM and virtual |
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* mode on PR KVM |
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*/ |
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static u64 *kvmppc_page_address(struct page *page) |
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{ |
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#if defined(HASHED_PAGE_VIRTUAL) || defined(WANT_PAGE_VIRTUAL) |
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#error TODO: fix to avoid page_address() here |
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#endif |
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return (u64 *) page_address(page); |
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} |
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/* |
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* Handles TCE requests for emulated devices. |
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* Puts guest TCE values to the table and expects user space to convert them. |
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* Cannot fail so kvmppc_rm_tce_validate must be called before it. |
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*/ |
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static void kvmppc_rm_tce_put(struct kvmppc_spapr_tce_table *stt, |
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unsigned long idx, unsigned long tce) |
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{ |
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struct page *page; |
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u64 *tbl; |
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idx -= stt->offset; |
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page = stt->pages[idx / TCES_PER_PAGE]; |
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/* |
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* page must not be NULL in real mode, |
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* kvmppc_rm_ioba_validate() must have taken care of this. |
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*/ |
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WARN_ON_ONCE_RM(!page); |
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tbl = kvmppc_page_address(page); |
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tbl[idx % TCES_PER_PAGE] = tce; |
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} |
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/* |
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* TCEs pages are allocated in kvmppc_rm_tce_put() which won't be able to do so |
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* in real mode. |
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* Check if kvmppc_rm_tce_put() can succeed in real mode, i.e. a TCEs page is |
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* allocated or not required (when clearing a tce entry). |
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*/ |
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static long kvmppc_rm_ioba_validate(struct kvmppc_spapr_tce_table *stt, |
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unsigned long ioba, unsigned long npages, bool clearing) |
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{ |
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unsigned long i, idx, sttpage, sttpages; |
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unsigned long ret = kvmppc_ioba_validate(stt, ioba, npages); |
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if (ret) |
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return ret; |
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/* |
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* clearing==true says kvmppc_rm_tce_put won't be allocating pages |
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* for empty tces. |
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*/ |
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if (clearing) |
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return H_SUCCESS; |
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idx = (ioba >> stt->page_shift) - stt->offset; |
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sttpage = idx / TCES_PER_PAGE; |
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sttpages = ALIGN(idx % TCES_PER_PAGE + npages, TCES_PER_PAGE) / |
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TCES_PER_PAGE; |
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for (i = sttpage; i < sttpage + sttpages; ++i) |
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if (!stt->pages[i]) |
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return H_TOO_HARD; |
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return H_SUCCESS; |
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} |
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static long iommu_tce_xchg_no_kill_rm(struct mm_struct *mm, |
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struct iommu_table *tbl, |
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unsigned long entry, unsigned long *hpa, |
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enum dma_data_direction *direction) |
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{ |
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long ret; |
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ret = tbl->it_ops->xchg_no_kill(tbl, entry, hpa, direction, true); |
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if (!ret && ((*direction == DMA_FROM_DEVICE) || |
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(*direction == DMA_BIDIRECTIONAL))) { |
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__be64 *pua = IOMMU_TABLE_USERSPACE_ENTRY_RO(tbl, entry); |
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/* |
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* kvmppc_rm_tce_iommu_do_map() updates the UA cache after |
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* calling this so we still get here a valid UA. |
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*/ |
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if (pua && *pua) |
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mm_iommu_ua_mark_dirty_rm(mm, be64_to_cpu(*pua)); |
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} |
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return ret; |
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} |
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static void iommu_tce_kill_rm(struct iommu_table *tbl, |
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unsigned long entry, unsigned long pages) |
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{ |
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if (tbl->it_ops->tce_kill) |
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tbl->it_ops->tce_kill(tbl, entry, pages, true); |
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} |
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static void kvmppc_rm_clear_tce(struct kvm *kvm, struct iommu_table *tbl, |
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unsigned long entry) |
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{ |
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unsigned long hpa = 0; |
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enum dma_data_direction dir = DMA_NONE; |
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iommu_tce_xchg_no_kill_rm(kvm->mm, tbl, entry, &hpa, &dir); |
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} |
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static long kvmppc_rm_tce_iommu_mapped_dec(struct kvm *kvm, |
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struct iommu_table *tbl, unsigned long entry) |
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{ |
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struct mm_iommu_table_group_mem_t *mem = NULL; |
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const unsigned long pgsize = 1ULL << tbl->it_page_shift; |
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__be64 *pua = IOMMU_TABLE_USERSPACE_ENTRY_RO(tbl, entry); |
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if (!pua) |
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/* it_userspace allocation might be delayed */ |
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return H_TOO_HARD; |
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mem = mm_iommu_lookup_rm(kvm->mm, be64_to_cpu(*pua), pgsize); |
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if (!mem) |
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return H_TOO_HARD; |
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mm_iommu_mapped_dec(mem); |
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*pua = cpu_to_be64(0); |
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return H_SUCCESS; |
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} |
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static long kvmppc_rm_tce_iommu_do_unmap(struct kvm *kvm, |
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struct iommu_table *tbl, unsigned long entry) |
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{ |
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enum dma_data_direction dir = DMA_NONE; |
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unsigned long hpa = 0; |
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long ret; |
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if (iommu_tce_xchg_no_kill_rm(kvm->mm, tbl, entry, &hpa, &dir)) |
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/* |
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* real mode xchg can fail if struct page crosses |
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* a page boundary |
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*/ |
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return H_TOO_HARD; |
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if (dir == DMA_NONE) |
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return H_SUCCESS; |
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ret = kvmppc_rm_tce_iommu_mapped_dec(kvm, tbl, entry); |
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if (ret) |
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iommu_tce_xchg_no_kill_rm(kvm->mm, tbl, entry, &hpa, &dir); |
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return ret; |
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} |
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static long kvmppc_rm_tce_iommu_unmap(struct kvm *kvm, |
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struct kvmppc_spapr_tce_table *stt, struct iommu_table *tbl, |
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unsigned long entry) |
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{ |
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unsigned long i, ret = H_SUCCESS; |
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unsigned long subpages = 1ULL << (stt->page_shift - tbl->it_page_shift); |
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unsigned long io_entry = entry * subpages; |
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for (i = 0; i < subpages; ++i) { |
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ret = kvmppc_rm_tce_iommu_do_unmap(kvm, tbl, io_entry + i); |
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if (ret != H_SUCCESS) |
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break; |
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} |
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return ret; |
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} |
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static long kvmppc_rm_tce_iommu_do_map(struct kvm *kvm, struct iommu_table *tbl, |
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unsigned long entry, unsigned long ua, |
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enum dma_data_direction dir) |
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{ |
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long ret; |
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unsigned long hpa = 0; |
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__be64 *pua = IOMMU_TABLE_USERSPACE_ENTRY_RO(tbl, entry); |
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struct mm_iommu_table_group_mem_t *mem; |
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if (!pua) |
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/* it_userspace allocation might be delayed */ |
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return H_TOO_HARD; |
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mem = mm_iommu_lookup_rm(kvm->mm, ua, 1ULL << tbl->it_page_shift); |
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if (!mem) |
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return H_TOO_HARD; |
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if (WARN_ON_ONCE_RM(mm_iommu_ua_to_hpa_rm(mem, ua, tbl->it_page_shift, |
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&hpa))) |
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return H_TOO_HARD; |
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if (WARN_ON_ONCE_RM(mm_iommu_mapped_inc(mem))) |
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return H_TOO_HARD; |
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ret = iommu_tce_xchg_no_kill_rm(kvm->mm, tbl, entry, &hpa, &dir); |
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if (ret) { |
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mm_iommu_mapped_dec(mem); |
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/* |
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* real mode xchg can fail if struct page crosses |
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* a page boundary |
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*/ |
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return H_TOO_HARD; |
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} |
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if (dir != DMA_NONE) |
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kvmppc_rm_tce_iommu_mapped_dec(kvm, tbl, entry); |
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*pua = cpu_to_be64(ua); |
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|
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return 0; |
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} |
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static long kvmppc_rm_tce_iommu_map(struct kvm *kvm, |
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struct kvmppc_spapr_tce_table *stt, struct iommu_table *tbl, |
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unsigned long entry, unsigned long ua, |
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enum dma_data_direction dir) |
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{ |
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unsigned long i, pgoff, ret = H_SUCCESS; |
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unsigned long subpages = 1ULL << (stt->page_shift - tbl->it_page_shift); |
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unsigned long io_entry = entry * subpages; |
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for (i = 0, pgoff = 0; i < subpages; |
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++i, pgoff += IOMMU_PAGE_SIZE(tbl)) { |
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ret = kvmppc_rm_tce_iommu_do_map(kvm, tbl, |
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io_entry + i, ua + pgoff, dir); |
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if (ret != H_SUCCESS) |
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break; |
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} |
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return ret; |
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} |
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|
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long kvmppc_rm_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn, |
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unsigned long ioba, unsigned long tce) |
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{ |
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struct kvmppc_spapr_tce_table *stt; |
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long ret; |
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struct kvmppc_spapr_tce_iommu_table *stit; |
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unsigned long entry, ua = 0; |
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enum dma_data_direction dir; |
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|
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/* udbg_printf("H_PUT_TCE(): liobn=0x%lx ioba=0x%lx, tce=0x%lx\n", */ |
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/* liobn, ioba, tce); */ |
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stt = kvmppc_find_table(vcpu->kvm, liobn); |
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if (!stt) |
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return H_TOO_HARD; |
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ret = kvmppc_rm_ioba_validate(stt, ioba, 1, tce == 0); |
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if (ret != H_SUCCESS) |
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return ret; |
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|
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ret = kvmppc_rm_tce_validate(stt, tce); |
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if (ret != H_SUCCESS) |
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return ret; |
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|
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dir = iommu_tce_direction(tce); |
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if ((dir != DMA_NONE) && kvmppc_rm_tce_to_ua(vcpu->kvm, tce, &ua)) |
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return H_PARAMETER; |
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|
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entry = ioba >> stt->page_shift; |
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|
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list_for_each_entry_lockless(stit, &stt->iommu_tables, next) { |
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if (dir == DMA_NONE) |
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ret = kvmppc_rm_tce_iommu_unmap(vcpu->kvm, stt, |
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stit->tbl, entry); |
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else |
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ret = kvmppc_rm_tce_iommu_map(vcpu->kvm, stt, |
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stit->tbl, entry, ua, dir); |
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|
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iommu_tce_kill_rm(stit->tbl, entry, 1); |
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|
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if (ret != H_SUCCESS) { |
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kvmppc_rm_clear_tce(vcpu->kvm, stit->tbl, entry); |
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return ret; |
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} |
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} |
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kvmppc_rm_tce_put(stt, entry, tce); |
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|
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return H_SUCCESS; |
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} |
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|
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static long kvmppc_rm_ua_to_hpa(struct kvm_vcpu *vcpu, unsigned long mmu_seq, |
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unsigned long ua, unsigned long *phpa) |
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{ |
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pte_t *ptep, pte; |
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unsigned shift = 0; |
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|
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/* |
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* Called in real mode with MSR_EE = 0. We are safe here. |
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* It is ok to do the lookup with arch.pgdir here, because |
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* we are doing this on secondary cpus and current task there |
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* is not the hypervisor. Also this is safe against THP in the |
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* host, because an IPI to primary thread will wait for the secondary |
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* to exit which will agains result in the below page table walk |
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* to finish. |
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*/ |
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/* an rmap lock won't make it safe. because that just ensure hash |
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* page table entries are removed with rmap lock held. After that |
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* mmu notifier returns and we go ahead and removing ptes from Qemu page table. |
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*/ |
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ptep = find_kvm_host_pte(vcpu->kvm, mmu_seq, ua, &shift); |
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if (!ptep) |
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return -ENXIO; |
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|
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pte = READ_ONCE(*ptep); |
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if (!pte_present(pte)) |
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return -ENXIO; |
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|
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if (!shift) |
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shift = PAGE_SHIFT; |
|
|
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/* Avoid handling anything potentially complicated in realmode */ |
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if (shift > PAGE_SHIFT) |
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return -EAGAIN; |
|
|
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if (!pte_young(pte)) |
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return -EAGAIN; |
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|
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*phpa = (pte_pfn(pte) << PAGE_SHIFT) | (ua & ((1ULL << shift) - 1)) | |
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(ua & ~PAGE_MASK); |
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|
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return 0; |
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} |
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|
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long kvmppc_rm_h_put_tce_indirect(struct kvm_vcpu *vcpu, |
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unsigned long liobn, unsigned long ioba, |
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unsigned long tce_list, unsigned long npages) |
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{ |
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struct kvm *kvm = vcpu->kvm; |
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struct kvmppc_spapr_tce_table *stt; |
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long i, ret = H_SUCCESS; |
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unsigned long tces, entry, ua = 0; |
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unsigned long mmu_seq; |
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bool prereg = false; |
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struct kvmppc_spapr_tce_iommu_table *stit; |
|
|
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/* |
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* used to check for invalidations in progress |
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*/ |
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mmu_seq = kvm->mmu_notifier_seq; |
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smp_rmb(); |
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|
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stt = kvmppc_find_table(vcpu->kvm, liobn); |
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if (!stt) |
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return H_TOO_HARD; |
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|
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entry = ioba >> stt->page_shift; |
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/* |
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* The spec says that the maximum size of the list is 512 TCEs |
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* so the whole table addressed resides in 4K page |
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*/ |
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if (npages > 512) |
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return H_PARAMETER; |
|
|
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if (tce_list & (SZ_4K - 1)) |
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return H_PARAMETER; |
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|
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ret = kvmppc_rm_ioba_validate(stt, ioba, npages, false); |
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if (ret != H_SUCCESS) |
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return ret; |
|
|
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if (mm_iommu_preregistered(vcpu->kvm->mm)) { |
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/* |
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* We get here if guest memory was pre-registered which |
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* is normally VFIO case and gpa->hpa translation does not |
|
* depend on hpt. |
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*/ |
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struct mm_iommu_table_group_mem_t *mem; |
|
|
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if (kvmppc_rm_tce_to_ua(vcpu->kvm, tce_list, &ua)) |
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return H_TOO_HARD; |
|
|
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mem = mm_iommu_lookup_rm(vcpu->kvm->mm, ua, IOMMU_PAGE_SIZE_4K); |
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if (mem) |
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prereg = mm_iommu_ua_to_hpa_rm(mem, ua, |
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IOMMU_PAGE_SHIFT_4K, &tces) == 0; |
|
} |
|
|
|
if (!prereg) { |
|
/* |
|
* This is usually a case of a guest with emulated devices only |
|
* when TCE list is not in preregistered memory. |
|
* We do not require memory to be preregistered in this case |
|
* so lock rmap and do __find_linux_pte_or_hugepte(). |
|
*/ |
|
if (kvmppc_rm_tce_to_ua(vcpu->kvm, tce_list, &ua)) |
|
return H_TOO_HARD; |
|
|
|
arch_spin_lock(&kvm->mmu_lock.rlock.raw_lock); |
|
if (kvmppc_rm_ua_to_hpa(vcpu, mmu_seq, ua, &tces)) { |
|
ret = H_TOO_HARD; |
|
goto unlock_exit; |
|
} |
|
} |
|
|
|
for (i = 0; i < npages; ++i) { |
|
unsigned long tce = be64_to_cpu(((u64 *)tces)[i]); |
|
|
|
ret = kvmppc_rm_tce_validate(stt, tce); |
|
if (ret != H_SUCCESS) |
|
goto unlock_exit; |
|
} |
|
|
|
for (i = 0; i < npages; ++i) { |
|
unsigned long tce = be64_to_cpu(((u64 *)tces)[i]); |
|
|
|
ua = 0; |
|
if (kvmppc_rm_tce_to_ua(vcpu->kvm, tce, &ua)) { |
|
ret = H_PARAMETER; |
|
goto invalidate_exit; |
|
} |
|
|
|
list_for_each_entry_lockless(stit, &stt->iommu_tables, next) { |
|
ret = kvmppc_rm_tce_iommu_map(vcpu->kvm, stt, |
|
stit->tbl, entry + i, ua, |
|
iommu_tce_direction(tce)); |
|
|
|
if (ret != H_SUCCESS) { |
|
kvmppc_rm_clear_tce(vcpu->kvm, stit->tbl, |
|
entry); |
|
goto invalidate_exit; |
|
} |
|
} |
|
|
|
kvmppc_rm_tce_put(stt, entry + i, tce); |
|
} |
|
|
|
invalidate_exit: |
|
list_for_each_entry_lockless(stit, &stt->iommu_tables, next) |
|
iommu_tce_kill_rm(stit->tbl, entry, npages); |
|
|
|
unlock_exit: |
|
if (!prereg) |
|
arch_spin_unlock(&kvm->mmu_lock.rlock.raw_lock); |
|
return ret; |
|
} |
|
|
|
long kvmppc_rm_h_stuff_tce(struct kvm_vcpu *vcpu, |
|
unsigned long liobn, unsigned long ioba, |
|
unsigned long tce_value, unsigned long npages) |
|
{ |
|
struct kvmppc_spapr_tce_table *stt; |
|
long i, ret; |
|
struct kvmppc_spapr_tce_iommu_table *stit; |
|
|
|
stt = kvmppc_find_table(vcpu->kvm, liobn); |
|
if (!stt) |
|
return H_TOO_HARD; |
|
|
|
ret = kvmppc_rm_ioba_validate(stt, ioba, npages, tce_value == 0); |
|
if (ret != H_SUCCESS) |
|
return ret; |
|
|
|
/* Check permission bits only to allow userspace poison TCE for debug */ |
|
if (tce_value & (TCE_PCI_WRITE | TCE_PCI_READ)) |
|
return H_PARAMETER; |
|
|
|
list_for_each_entry_lockless(stit, &stt->iommu_tables, next) { |
|
unsigned long entry = ioba >> stt->page_shift; |
|
|
|
for (i = 0; i < npages; ++i) { |
|
ret = kvmppc_rm_tce_iommu_unmap(vcpu->kvm, stt, |
|
stit->tbl, entry + i); |
|
|
|
if (ret == H_SUCCESS) |
|
continue; |
|
|
|
if (ret == H_TOO_HARD) |
|
goto invalidate_exit; |
|
|
|
WARN_ON_ONCE_RM(1); |
|
kvmppc_rm_clear_tce(vcpu->kvm, stit->tbl, entry); |
|
} |
|
} |
|
|
|
for (i = 0; i < npages; ++i, ioba += (1ULL << stt->page_shift)) |
|
kvmppc_rm_tce_put(stt, ioba >> stt->page_shift, tce_value); |
|
|
|
invalidate_exit: |
|
list_for_each_entry_lockless(stit, &stt->iommu_tables, next) |
|
iommu_tce_kill_rm(stit->tbl, ioba >> stt->page_shift, npages); |
|
|
|
return ret; |
|
} |
|
|
|
/* This can be called in either virtual mode or real mode */ |
|
long kvmppc_h_get_tce(struct kvm_vcpu *vcpu, unsigned long liobn, |
|
unsigned long ioba) |
|
{ |
|
struct kvmppc_spapr_tce_table *stt; |
|
long ret; |
|
unsigned long idx; |
|
struct page *page; |
|
u64 *tbl; |
|
|
|
stt = kvmppc_find_table(vcpu->kvm, liobn); |
|
if (!stt) |
|
return H_TOO_HARD; |
|
|
|
ret = kvmppc_ioba_validate(stt, ioba, 1); |
|
if (ret != H_SUCCESS) |
|
return ret; |
|
|
|
idx = (ioba >> stt->page_shift) - stt->offset; |
|
page = stt->pages[idx / TCES_PER_PAGE]; |
|
if (!page) { |
|
vcpu->arch.regs.gpr[4] = 0; |
|
return H_SUCCESS; |
|
} |
|
tbl = (u64 *)page_address(page); |
|
|
|
vcpu->arch.regs.gpr[4] = tbl[idx % TCES_PER_PAGE]; |
|
|
|
return H_SUCCESS; |
|
} |
|
EXPORT_SYMBOL_GPL(kvmppc_h_get_tce); |
|
|
|
#endif /* KVM_BOOK3S_HV_POSSIBLE */
|
|
|