From 1c5de1939c204bde9cce87f4eb3d26e9f9eb732b Mon Sep 17 00:00:00 2001 From: Jeremy Fitzhardinge Date: Mon, 9 Feb 2009 12:05:49 -0800 Subject: xen: add privcmd driver The privcmd interface in xenfs allows the tool stack in the privileged domain to get fairly direct access to the hypervisor in order to do various management things such as domain construction. [ Impact: new xenfs interface for privileged operations ] Signed-off-by: Jeremy Fitzhardinge --- drivers/xen/xenfs/privcmd.c | 436 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 436 insertions(+) create mode 100644 drivers/xen/xenfs/privcmd.c (limited to 'drivers/xen/xenfs/privcmd.c') diff --git a/drivers/xen/xenfs/privcmd.c b/drivers/xen/xenfs/privcmd.c new file mode 100644 index 000000000000..c7192f314f86 --- /dev/null +++ b/drivers/xen/xenfs/privcmd.c @@ -0,0 +1,436 @@ +/****************************************************************************** + * privcmd.c + * + * Interface to privileged domain-0 commands. + * + * Copyright (c) 2002-2004, K A Fraser, B Dragovic + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +#ifndef HAVE_ARCH_PRIVCMD_MMAP +static int privcmd_enforce_singleshot_mapping(struct vm_area_struct *vma); +#endif + +struct remap_data { + unsigned long mfn; + unsigned domid; + pgprot_t prot; +}; + +static int remap_area_mfn_pte_fn(pte_t *ptep, pgtable_t token, + unsigned long addr, void *data) +{ + struct remap_data *rmd = data; + pte_t pte = pte_mkspecial(pfn_pte(rmd->mfn++, rmd->prot)); + + xen_set_domain_pte(ptep, pte, rmd->domid); + + return 0; +} + +int remap_domain_mfn_range(struct vm_area_struct *vma, unsigned long addr, + unsigned long mfn, unsigned long size, + pgprot_t prot, unsigned domid) +{ + struct remap_data rmd; + int err; + + prot = __pgprot(pgprot_val(prot) | _PAGE_IOMAP); + + vma->vm_flags |= VM_IO | VM_RESERVED | VM_PFNMAP; + + rmd.mfn = mfn; + rmd.prot = prot; + rmd.domid = domid; + + err = apply_to_page_range(vma->vm_mm, addr, size, + remap_area_mfn_pte_fn, &rmd); + + return err; +} + +static long privcmd_ioctl_hypercall(void __user *udata) +{ + struct privcmd_hypercall hypercall; + long ret; + + if (copy_from_user(&hypercall, udata, sizeof(hypercall))) + return -EFAULT; + + ret = privcmd_call(hypercall.op, + hypercall.arg[0], hypercall.arg[1], + hypercall.arg[2], hypercall.arg[3], + hypercall.arg[4]); + + return ret; +} + +static void free_page_list(struct list_head *pages) +{ + struct page *p, *n; + + list_for_each_entry_safe(p, n, pages, lru) + __free_page(p); + + INIT_LIST_HEAD(pages); +} + +/* + * Given an array of items in userspace, return a list of pages + * containing the data. If copying fails, either because of memory + * allocation failure or a problem reading user memory, return an + * error code; its up to the caller to dispose of any partial list. + */ +static int gather_array(struct list_head *pagelist, + unsigned nelem, size_t size, + void __user *data) +{ + unsigned pageidx; + void *pagedata; + int ret; + + if (size > PAGE_SIZE) + return 0; + + pageidx = PAGE_SIZE; + pagedata = NULL; /* quiet, gcc */ + while (nelem--) { + if (pageidx > PAGE_SIZE-size) { + struct page *page = alloc_page(GFP_KERNEL); + + ret = -ENOMEM; + if (page == NULL) + goto fail; + + pagedata = page_address(page); + + list_add_tail(&page->lru, pagelist); + pageidx = 0; + } + + ret = -EFAULT; + if (copy_from_user(pagedata + pageidx, data, size)) + goto fail; + + data += size; + pageidx += size; + } + + ret = 0; + +fail: + return ret; +} + +/* + * Call function "fn" on each element of the array fragmented + * over a list of pages. + */ +static int traverse_pages(unsigned nelem, size_t size, + struct list_head *pos, + int (*fn)(void *data, void *state), + void *state) +{ + void *pagedata; + unsigned pageidx; + int ret; + + BUG_ON(size > PAGE_SIZE); + + pageidx = PAGE_SIZE; + pagedata = NULL; /* hush, gcc */ + + while (nelem--) { + if (pageidx > PAGE_SIZE-size) { + struct page *page; + pos = pos->next; + page = list_entry(pos, struct page, lru); + pagedata = page_address(page); + pageidx = 0; + } + + ret = (*fn)(pagedata + pageidx, state); + if (ret) + break; + pageidx += size; + } + + return ret; +} + +struct mmap_mfn_state { + unsigned long va; + struct vm_area_struct *vma; + domid_t domain; +}; + +static int mmap_mfn_range(void *data, void *state) +{ + struct privcmd_mmap_entry *msg = data; + struct mmap_mfn_state *st = state; + struct vm_area_struct *vma = st->vma; + int rc; + + /* Do not allow range to wrap the address space. */ + if ((msg->npages > (LONG_MAX >> PAGE_SHIFT)) || + ((unsigned long)(msg->npages << PAGE_SHIFT) >= -st->va)) + return -EINVAL; + + /* Range chunks must be contiguous in va space. */ + if ((msg->va != st->va) || + ((msg->va+(msg->npages< vma->vm_end)) + return -EINVAL; + + rc = remap_domain_mfn_range(vma, + msg->va & PAGE_MASK, + msg->mfn, + msg->npages << PAGE_SHIFT, + vma->vm_page_prot, + st->domain); + if (rc < 0) + return rc; + + st->va += msg->npages << PAGE_SHIFT; + + return 0; +} + +static long privcmd_ioctl_mmap(void __user *udata) +{ + struct privcmd_mmap mmapcmd; + struct mm_struct *mm = current->mm; + struct vm_area_struct *vma; + int rc; + LIST_HEAD(pagelist); + struct mmap_mfn_state state; + + if (!xen_initial_domain()) + return -EPERM; + + if (copy_from_user(&mmapcmd, udata, sizeof(mmapcmd))) + return -EFAULT; + + rc = gather_array(&pagelist, + mmapcmd.num, sizeof(struct privcmd_mmap_entry), + mmapcmd.entry); + + if (rc || list_empty(&pagelist)) + goto out; + + down_write(&mm->mmap_sem); + + { + struct page *page = list_first_entry(&pagelist, + struct page, lru); + struct privcmd_mmap_entry *msg = page_address(page); + + vma = find_vma(mm, msg->va); + rc = -EINVAL; + + if (!vma || (msg->va != vma->vm_start) || + !privcmd_enforce_singleshot_mapping(vma)) + goto out_up; + } + + state.va = vma->vm_start; + state.vma = vma; + state.domain = mmapcmd.dom; + + rc = traverse_pages(mmapcmd.num, sizeof(struct privcmd_mmap_entry), + &pagelist, + mmap_mfn_range, &state); + + +out_up: + up_write(&mm->mmap_sem); + +out: + free_page_list(&pagelist); + + return rc; +} + +struct mmap_batch_state { + domid_t domain; + unsigned long va; + struct vm_area_struct *vma; + int err; + + xen_pfn_t __user *user; +}; + +static int mmap_batch_fn(void *data, void *state) +{ + xen_pfn_t *mfnp = data; + struct mmap_batch_state *st = state; + + if (remap_domain_mfn_range(st->vma, st->va & PAGE_MASK, + *mfnp, PAGE_SIZE, + st->vma->vm_page_prot, st->domain) < 0) { + *mfnp |= 0xf0000000U; + st->err++; + } + st->va += PAGE_SIZE; + + return 0; +} + +static int mmap_return_errors(void *data, void *state) +{ + xen_pfn_t *mfnp = data; + struct mmap_batch_state *st = state; + + put_user(*mfnp, st->user++); + + return 0; +} + +static long privcmd_ioctl_mmap_batch(void __user *udata) +{ + int ret; + struct privcmd_mmapbatch m; + struct mm_struct *mm = current->mm; + struct vm_area_struct *vma; + unsigned long nr_pages; + LIST_HEAD(pagelist); + struct mmap_batch_state state; + + if (!xen_initial_domain()) + return -EPERM; + + if (copy_from_user(&m, udata, sizeof(m))) + return -EFAULT; + + nr_pages = m.num; + if ((m.num <= 0) || (nr_pages > (LONG_MAX >> PAGE_SHIFT))) + return -EINVAL; + + ret = gather_array(&pagelist, m.num, sizeof(xen_pfn_t), + m.arr); + + if (ret || list_empty(&pagelist)) + goto out; + + down_write(&mm->mmap_sem); + + vma = find_vma(mm, m.addr); + ret = -EINVAL; + if (!vma || + (m.addr != vma->vm_start) || + ((m.addr + (nr_pages << PAGE_SHIFT)) != vma->vm_end) || + !privcmd_enforce_singleshot_mapping(vma)) { + up_write(&mm->mmap_sem); + goto out; + } + + state.domain = m.dom; + state.vma = vma; + state.va = m.addr; + state.err = 0; + + ret = traverse_pages(m.num, sizeof(xen_pfn_t), + &pagelist, mmap_batch_fn, &state); + + up_write(&mm->mmap_sem); + + if (state.err > 0) { + ret = state.err; + + state.user = udata; + traverse_pages(m.num, sizeof(xen_pfn_t), + &pagelist, + mmap_return_errors, &state); + } + +out: + free_page_list(&pagelist); + + return ret; +} + +static long privcmd_ioctl(struct file *file, + unsigned int cmd, unsigned long data) +{ + int ret = -ENOSYS; + void __user *udata = (void __user *) data; + + switch (cmd) { + case IOCTL_PRIVCMD_HYPERCALL: + ret = privcmd_ioctl_hypercall(udata); + break; + + case IOCTL_PRIVCMD_MMAP: + ret = privcmd_ioctl_mmap(udata); + break; + + case IOCTL_PRIVCMD_MMAPBATCH: + ret = privcmd_ioctl_mmap_batch(udata); + break; + + default: + ret = -EINVAL; + break; + } + + return ret; +} + +#ifndef HAVE_ARCH_PRIVCMD_MMAP +static int privcmd_fault(struct vm_area_struct *vma, struct vm_fault *vmf) +{ + return VM_FAULT_SIGBUS; +} + +static struct vm_operations_struct privcmd_vm_ops = { + .fault = privcmd_fault +}; + +static int privcmd_mmap(struct file *file, struct vm_area_struct *vma) +{ + /* Unsupported for auto-translate guests. */ + if (xen_feature(XENFEAT_auto_translated_physmap)) + return -ENOSYS; + + /* DONTCOPY is essential for Xen as copy_page_range is broken. */ + vma->vm_flags |= VM_RESERVED | VM_IO | VM_DONTCOPY; + vma->vm_ops = &privcmd_vm_ops; + vma->vm_private_data = NULL; + + return 0; +} + +static int privcmd_enforce_singleshot_mapping(struct vm_area_struct *vma) +{ + return (xchg(&vma->vm_private_data, (void *)1) == NULL); +} +#endif + +const struct file_operations privcmd_file_ops = { + .unlocked_ioctl = privcmd_ioctl, + .mmap = privcmd_mmap, +}; -- cgit From 441c7416b55d3d48b4aaafc5bdd804092387d877 Mon Sep 17 00:00:00 2001 From: Jeremy Fitzhardinge Date: Fri, 6 Mar 2009 09:56:59 -0800 Subject: xen/privcmd: print SIGBUS faults Print more detail about privcmd mapping faults for debugging. [ Impact: debug ] Signed-off-by: Jeremy Fitzhardinge --- drivers/xen/xenfs/privcmd.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/xen/xenfs/privcmd.c') diff --git a/drivers/xen/xenfs/privcmd.c b/drivers/xen/xenfs/privcmd.c index c7192f314f86..6b602f505363 100644 --- a/drivers/xen/xenfs/privcmd.c +++ b/drivers/xen/xenfs/privcmd.c @@ -403,6 +403,10 @@ static long privcmd_ioctl(struct file *file, #ifndef HAVE_ARCH_PRIVCMD_MMAP static int privcmd_fault(struct vm_area_struct *vma, struct vm_fault *vmf) { + printk(KERN_DEBUG "privcmd_fault: vma=%p %lx-%lx, pgoff=%lx, uv=%p\n", + vma, vma->vm_start, vma->vm_end, + vmf->pgoff, vmf->virtual_address); + return VM_FAULT_SIGBUS; } -- cgit From f31fdf510531333dea95f0a92e6eaa1c3a7541e2 Mon Sep 17 00:00:00 2001 From: Jeremy Fitzhardinge Date: Sun, 8 Mar 2009 04:10:00 -0700 Subject: xen/privcmd: make sure vma is ours before doing anything to it Test vma->vm_ops is our operations to make sure we created it. We don't want to stomp on other random vmas. [ Impact: bugfix; prevent ioctl from affecting other mappings ] Signed-off-by: Jeremy Fitzhardinge --- drivers/xen/xenfs/privcmd.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/xen/xenfs/privcmd.c') diff --git a/drivers/xen/xenfs/privcmd.c b/drivers/xen/xenfs/privcmd.c index 6b602f505363..80526afd3063 100644 --- a/drivers/xen/xenfs/privcmd.c +++ b/drivers/xen/xenfs/privcmd.c @@ -310,6 +310,8 @@ static int mmap_return_errors(void *data, void *state) return 0; } +static struct vm_operations_struct privcmd_vm_ops; + static long privcmd_ioctl_mmap_batch(void __user *udata) { int ret; @@ -341,6 +343,7 @@ static long privcmd_ioctl_mmap_batch(void __user *udata) vma = find_vma(mm, m.addr); ret = -EINVAL; if (!vma || + vma->vm_ops != &privcmd_vm_ops || (m.addr != vma->vm_start) || ((m.addr + (nr_pages << PAGE_SHIFT)) != vma->vm_end) || !privcmd_enforce_singleshot_mapping(vma)) { -- cgit From f020e2905166e12f9a8f109fe968cb5a9db887e9 Mon Sep 17 00:00:00 2001 From: Ian Campbell Date: Wed, 20 May 2009 15:42:14 +0100 Subject: privcmd: MMAPBATCH: Fix error handling/reporting On error IOCTL_PRIVCMD_MMAPBATCH is expected to set the top nibble of the effected MFN and return 0. Currently it leaves the MFN unmodified and returns the number of failures. Therefore: - reimplement remap_domain_mfn_range() using direct HYPERVISOR_mmu_update() calls and small batches. The xen_set_domain_pte() interface does not report errors and since some failures are expected/normal using the multicall infrastructure is too noisy. - return 0 as expected - writeback the updated MFN list to mmapbatch->arr not over mmapbatch, smashing the caller's stack. - remap_domain_mfn_range can be static. With this change I am able to start an HVM domain. Signed-off-by: Ian Campbell Cc: Jeremy Fitzhardinge Signed-off-by: Jeremy Fitzhardinge --- drivers/xen/xenfs/privcmd.c | 56 +++++++++++++++++++++++++++++++++------------ 1 file changed, 41 insertions(+), 15 deletions(-) (limited to 'drivers/xen/xenfs/privcmd.c') diff --git a/drivers/xen/xenfs/privcmd.c b/drivers/xen/xenfs/privcmd.c index 80526afd3063..438223ae0fc3 100644 --- a/drivers/xen/xenfs/privcmd.c +++ b/drivers/xen/xenfs/privcmd.c @@ -32,14 +32,16 @@ #include #include +#define REMAP_BATCH_SIZE 16 + #ifndef HAVE_ARCH_PRIVCMD_MMAP static int privcmd_enforce_singleshot_mapping(struct vm_area_struct *vma); #endif struct remap_data { unsigned long mfn; - unsigned domid; pgprot_t prot; + struct mmu_update *mmu_update; }; static int remap_area_mfn_pte_fn(pte_t *ptep, pgtable_t token, @@ -48,17 +50,23 @@ static int remap_area_mfn_pte_fn(pte_t *ptep, pgtable_t token, struct remap_data *rmd = data; pte_t pte = pte_mkspecial(pfn_pte(rmd->mfn++, rmd->prot)); - xen_set_domain_pte(ptep, pte, rmd->domid); + rmd->mmu_update->ptr = arbitrary_virt_to_machine(ptep).maddr; + rmd->mmu_update->val = pte_val_ma(pte); + rmd->mmu_update++; return 0; } -int remap_domain_mfn_range(struct vm_area_struct *vma, unsigned long addr, - unsigned long mfn, unsigned long size, - pgprot_t prot, unsigned domid) +static int remap_domain_mfn_range(struct vm_area_struct *vma, + unsigned long addr, + unsigned long mfn, int nr, + pgprot_t prot, unsigned domid) { struct remap_data rmd; - int err; + struct mmu_update mmu_update[REMAP_BATCH_SIZE]; + int batch; + unsigned long range; + int err = 0; prot = __pgprot(pgprot_val(prot) | _PAGE_IOMAP); @@ -66,10 +74,29 @@ int remap_domain_mfn_range(struct vm_area_struct *vma, unsigned long addr, rmd.mfn = mfn; rmd.prot = prot; - rmd.domid = domid; - err = apply_to_page_range(vma->vm_mm, addr, size, - remap_area_mfn_pte_fn, &rmd); + while (nr) { + batch = min(REMAP_BATCH_SIZE, nr); + range = (unsigned long)batch << PAGE_SHIFT; + + rmd.mmu_update = mmu_update; + err = apply_to_page_range(vma->vm_mm, addr, range, + remap_area_mfn_pte_fn, &rmd); + if (err) + goto out; + + err = -EFAULT; + if (HYPERVISOR_mmu_update(mmu_update, batch, NULL, domid) < 0) + goto out; + + nr -= batch; + addr += range; + } + + err = 0; +out: + + flush_tlb_all(); return err; } @@ -158,7 +185,7 @@ static int traverse_pages(unsigned nelem, size_t size, { void *pagedata; unsigned pageidx; - int ret; + int ret = 0; BUG_ON(size > PAGE_SIZE); @@ -208,8 +235,7 @@ static int mmap_mfn_range(void *data, void *state) rc = remap_domain_mfn_range(vma, msg->va & PAGE_MASK, - msg->mfn, - msg->npages << PAGE_SHIFT, + msg->mfn, msg->npages, vma->vm_page_prot, st->domain); if (rc < 0) @@ -290,7 +316,7 @@ static int mmap_batch_fn(void *data, void *state) struct mmap_batch_state *st = state; if (remap_domain_mfn_range(st->vma, st->va & PAGE_MASK, - *mfnp, PAGE_SIZE, + *mfnp, 1, st->vma->vm_page_prot, st->domain) < 0) { *mfnp |= 0xf0000000U; st->err++; @@ -362,9 +388,9 @@ static long privcmd_ioctl_mmap_batch(void __user *udata) up_write(&mm->mmap_sem); if (state.err > 0) { - ret = state.err; + ret = 0; - state.user = udata; + state.user = m.arr; traverse_pages(m.num, sizeof(xen_pfn_t), &pagelist, mmap_return_errors, &state); -- cgit From de1ef2065c4675ab1062ebc8d1cb6c5f42b61d04 Mon Sep 17 00:00:00 2001 From: Ian Campbell Date: Thu, 21 May 2009 10:09:46 +0100 Subject: xen/privcmd: move remap_domain_mfn_range() to core xen code and export. This allows xenfs to be built as a module, previously it required flush_tlb_all and arbitrary_virt_to_machine to be exported. Signed-off-by: Ian Campbell Signed-off-by: Jeremy Fitzhardinge --- arch/x86/xen/mmu.c | 66 ++++++++++++++++++++++++++++++++++++ drivers/xen/xenfs/privcmd.c | 81 +++++---------------------------------------- include/xen/xen-ops.h | 5 +++ 3 files changed, 79 insertions(+), 73 deletions(-) (limited to 'drivers/xen/xenfs/privcmd.c') diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c index 1ceb0f2fa0af..f08ea045620f 100644 --- a/arch/x86/xen/mmu.c +++ b/arch/x86/xen/mmu.c @@ -2265,6 +2265,72 @@ void __init xen_hvm_init_mmu_ops(void) } #endif +#define REMAP_BATCH_SIZE 16 + +struct remap_data { + unsigned long mfn; + pgprot_t prot; + struct mmu_update *mmu_update; +}; + +static int remap_area_mfn_pte_fn(pte_t *ptep, pgtable_t token, + unsigned long addr, void *data) +{ + struct remap_data *rmd = data; + pte_t pte = pte_mkspecial(pfn_pte(rmd->mfn++, rmd->prot)); + + rmd->mmu_update->ptr = arbitrary_virt_to_machine(ptep).maddr; + rmd->mmu_update->val = pte_val_ma(pte); + rmd->mmu_update++; + + return 0; +} + +int xen_remap_domain_mfn_range(struct vm_area_struct *vma, + unsigned long addr, + unsigned long mfn, int nr, + pgprot_t prot, unsigned domid) +{ + struct remap_data rmd; + struct mmu_update mmu_update[REMAP_BATCH_SIZE]; + int batch; + unsigned long range; + int err = 0; + + prot = __pgprot(pgprot_val(prot) | _PAGE_IOMAP); + + vma->vm_flags |= VM_IO | VM_RESERVED | VM_PFNMAP; + + rmd.mfn = mfn; + rmd.prot = prot; + + while (nr) { + batch = min(REMAP_BATCH_SIZE, nr); + range = (unsigned long)batch << PAGE_SHIFT; + + rmd.mmu_update = mmu_update; + err = apply_to_page_range(vma->vm_mm, addr, range, + remap_area_mfn_pte_fn, &rmd); + if (err) + goto out; + + err = -EFAULT; + if (HYPERVISOR_mmu_update(mmu_update, batch, NULL, domid) < 0) + goto out; + + nr -= batch; + addr += range; + } + + err = 0; +out: + + flush_tlb_all(); + + return err; +} +EXPORT_SYMBOL_GPL(xen_remap_domain_mfn_range); + #ifdef CONFIG_XEN_DEBUG_FS static struct dentry *d_mmu_debug; diff --git a/drivers/xen/xenfs/privcmd.c b/drivers/xen/xenfs/privcmd.c index 438223ae0fc3..f80be7f6eb95 100644 --- a/drivers/xen/xenfs/privcmd.c +++ b/drivers/xen/xenfs/privcmd.c @@ -31,76 +31,12 @@ #include #include #include - -#define REMAP_BATCH_SIZE 16 +#include #ifndef HAVE_ARCH_PRIVCMD_MMAP static int privcmd_enforce_singleshot_mapping(struct vm_area_struct *vma); #endif -struct remap_data { - unsigned long mfn; - pgprot_t prot; - struct mmu_update *mmu_update; -}; - -static int remap_area_mfn_pte_fn(pte_t *ptep, pgtable_t token, - unsigned long addr, void *data) -{ - struct remap_data *rmd = data; - pte_t pte = pte_mkspecial(pfn_pte(rmd->mfn++, rmd->prot)); - - rmd->mmu_update->ptr = arbitrary_virt_to_machine(ptep).maddr; - rmd->mmu_update->val = pte_val_ma(pte); - rmd->mmu_update++; - - return 0; -} - -static int remap_domain_mfn_range(struct vm_area_struct *vma, - unsigned long addr, - unsigned long mfn, int nr, - pgprot_t prot, unsigned domid) -{ - struct remap_data rmd; - struct mmu_update mmu_update[REMAP_BATCH_SIZE]; - int batch; - unsigned long range; - int err = 0; - - prot = __pgprot(pgprot_val(prot) | _PAGE_IOMAP); - - vma->vm_flags |= VM_IO | VM_RESERVED | VM_PFNMAP; - - rmd.mfn = mfn; - rmd.prot = prot; - - while (nr) { - batch = min(REMAP_BATCH_SIZE, nr); - range = (unsigned long)batch << PAGE_SHIFT; - - rmd.mmu_update = mmu_update; - err = apply_to_page_range(vma->vm_mm, addr, range, - remap_area_mfn_pte_fn, &rmd); - if (err) - goto out; - - err = -EFAULT; - if (HYPERVISOR_mmu_update(mmu_update, batch, NULL, domid) < 0) - goto out; - - nr -= batch; - addr += range; - } - - err = 0; -out: - - flush_tlb_all(); - - return err; -} - static long privcmd_ioctl_hypercall(void __user *udata) { struct privcmd_hypercall hypercall; @@ -233,11 +169,11 @@ static int mmap_mfn_range(void *data, void *state) ((msg->va+(msg->npages< vma->vm_end)) return -EINVAL; - rc = remap_domain_mfn_range(vma, - msg->va & PAGE_MASK, - msg->mfn, msg->npages, - vma->vm_page_prot, - st->domain); + rc = xen_remap_domain_mfn_range(vma, + msg->va & PAGE_MASK, + msg->mfn, msg->npages, + vma->vm_page_prot, + st->domain); if (rc < 0) return rc; @@ -315,9 +251,8 @@ static int mmap_batch_fn(void *data, void *state) xen_pfn_t *mfnp = data; struct mmap_batch_state *st = state; - if (remap_domain_mfn_range(st->vma, st->va & PAGE_MASK, - *mfnp, 1, - st->vma->vm_page_prot, st->domain) < 0) { + if (xen_remap_domain_mfn_range(st->vma, st->va & PAGE_MASK, *mfnp, 1, + st->vma->vm_page_prot, st->domain) < 0) { *mfnp |= 0xf0000000U; st->err++; } diff --git a/include/xen/xen-ops.h b/include/xen/xen-ops.h index 351f4051f6d8..98b92154a264 100644 --- a/include/xen/xen-ops.h +++ b/include/xen/xen-ops.h @@ -23,4 +23,9 @@ int xen_create_contiguous_region(unsigned long vstart, unsigned int order, void xen_destroy_contiguous_region(unsigned long vstart, unsigned int order); +int xen_remap_domain_mfn_range(struct vm_area_struct *vma, + unsigned long addr, + unsigned long mfn, int nr, + pgprot_t prot, unsigned domid); + #endif /* INCLUDE_XEN_OPS_H */ -- cgit