From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ian Campbell Subject: [PATCH XEN v7 12/29] tools: Implement xc_map_foreign_range(s) in terms of common helper Date: Wed, 16 Dec 2015 12:31:19 +0000 Message-ID: <1450269096-27598-13-git-send-email-ian.campbell@citrix.com> References: <1450269007.4053.48.camel@citrix.com> <1450269096-27598-1-git-send-email-ian.campbell@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1450269096-27598-1-git-send-email-ian.campbell@citrix.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: ian.jackson@eu.citrix.com, wei.liu2@citrix.com, xen-devel@lists.xen.org Cc: Ian Campbell List-Id: xen-devel@lists.xenproject.org Both Linux and FreeBSD already implemented these functions using identical helpers based on xc_map_foreign_pages. Make one copy of these common helpers and switch all OSes to use them, even those which previously had a specific lower level implementation of this functionality. This is makes two fewer low level interfaces to think about. Signed-off-by: Ian Campbell Acked-by: Wei Liu --- tools/libxc/xc_foreign_memory.c | 50 +++++++++++++++++++++++++++++ tools/libxc/xc_freebsd_osdep.c | 50 ----------------------------- tools/libxc/xc_linux_osdep.c | 49 ----------------------------- tools/libxc/xc_minios.c | 43 ------------------------- tools/libxc/xc_netbsd.c | 70 ----------------------------------------- tools/libxc/xc_solaris.c | 67 --------------------------------------- 6 files changed, 50 insertions(+), 279 deletions(-) diff --git a/tools/libxc/xc_foreign_memory.c b/tools/libxc/xc_foreign_memory.c index 2413e75..d1130e6 100644 --- a/tools/libxc/xc_foreign_memory.c +++ b/tools/libxc/xc_foreign_memory.c @@ -50,6 +50,56 @@ void *xc_map_foreign_pages(xc_interface *xch, uint32_t dom, int prot, return res; } +void *xc_map_foreign_range(xc_interface *xch, + uint32_t dom, int size, int prot, + unsigned long mfn) +{ + xen_pfn_t *arr; + int num; + int i; + void *ret; + + num = (size + XC_PAGE_SIZE - 1) >> XC_PAGE_SHIFT; + arr = calloc(num, sizeof(xen_pfn_t)); + if ( arr == NULL ) + return NULL; + + for ( i = 0; i < num; i++ ) + arr[i] = mfn + i; + + ret = xc_map_foreign_pages(xch, dom, prot, arr, num); + free(arr); + return ret; +} + +void *xc_map_foreign_ranges(xc_interface *xch, + uint32_t dom, size_t size, + int prot, size_t chunksize, + privcmd_mmap_entry_t entries[], + int nentries) +{ + xen_pfn_t *arr; + int num_per_entry; + int num; + int i; + int j; + void *ret; + + num_per_entry = chunksize >> XC_PAGE_SHIFT; + num = num_per_entry * nentries; + arr = calloc(num, sizeof(xen_pfn_t)); + if ( arr == NULL ) + return NULL; + + for ( i = 0; i < nentries; i++ ) + for ( j = 0; j < num_per_entry; j++ ) + arr[i * num_per_entry + j] = entries[i].mfn + j; + + ret = xc_map_foreign_pages(xch, dom, prot, arr, num); + free(arr); + return ret; +} + /* * stub for all not yet converted OSes (NetBSD and Solaris). New OSes should * just implement xc_map_foreign_bulk. diff --git a/tools/libxc/xc_freebsd_osdep.c b/tools/libxc/xc_freebsd_osdep.c index 6b440ee..7745d28 100644 --- a/tools/libxc/xc_freebsd_osdep.c +++ b/tools/libxc/xc_freebsd_osdep.c @@ -125,56 +125,6 @@ void *xc_map_foreign_bulk(xc_interface *xch, return addr; } -void *xc_map_foreign_range(xc_interface *xch, - uint32_t dom, int size, int prot, - unsigned long mfn) -{ - xen_pfn_t *arr; - int num; - int i; - void *ret; - - num = (size + XC_PAGE_SIZE - 1) >> XC_PAGE_SHIFT; - arr = calloc(num, sizeof(xen_pfn_t)); - if ( arr == NULL ) - return NULL; - - for ( i = 0; i < num; i++ ) - arr[i] = mfn + i; - - ret = xc_map_foreign_pages(xch, dom, prot, arr, num); - free(arr); - return ret; -} - -void *xc_map_foreign_ranges(xc_interface *xch, - uint32_t dom, size_t size, - int prot, size_t chunksize, - privcmd_mmap_entry_t entries[], - int nentries) -{ - xen_pfn_t *arr; - int num_per_entry; - int num; - int i; - int j; - void *ret; - - num_per_entry = chunksize >> XC_PAGE_SHIFT; - num = num_per_entry * nentries; - arr = calloc(num, sizeof(xen_pfn_t)); - if ( arr == NULL ) - return NULL; - - for ( i = 0; i < nentries; i++ ) - for ( j = 0; j < num_per_entry; j++ ) - arr[i * num_per_entry + j] = entries[i].mfn + j; - - ret = xc_map_foreign_pages(xch, dom, prot, arr, num); - free(arr); - return ret; -} - /* * Local variables: * mode: C diff --git a/tools/libxc/xc_linux_osdep.c b/tools/libxc/xc_linux_osdep.c index 39c88ce..acf44ce 100644 --- a/tools/libxc/xc_linux_osdep.c +++ b/tools/libxc/xc_linux_osdep.c @@ -290,55 +290,6 @@ void *xc_map_foreign_bulk(xc_interface *xch, return addr; } -void *xc_map_foreign_range(xc_interface *xch, - uint32_t dom, int size, int prot, - unsigned long mfn) -{ - xen_pfn_t *arr; - int num; - int i; - void *ret; - - num = (size + XC_PAGE_SIZE - 1) >> XC_PAGE_SHIFT; - arr = calloc(num, sizeof(xen_pfn_t)); - if ( arr == NULL ) - return NULL; - - for ( i = 0; i < num; i++ ) - arr[i] = mfn + i; - - ret = xc_map_foreign_pages(xch, dom, prot, arr, num); - free(arr); - return ret; -} - -void *xc_map_foreign_ranges(xc_interface *xch, - uint32_t dom, size_t size, int prot, - size_t chunksize, privcmd_mmap_entry_t entries[], - int nentries) -{ - xen_pfn_t *arr; - int num_per_entry; - int num; - int i; - int j; - void *ret; - - num_per_entry = chunksize >> XC_PAGE_SHIFT; - num = num_per_entry * nentries; - arr = calloc(num, sizeof(xen_pfn_t)); - if ( arr == NULL ) - return NULL; - - for ( i = 0; i < nentries; i++ ) - for ( j = 0; j < num_per_entry; j++ ) - arr[i * num_per_entry + j] = entries[i].mfn + j; - - ret = xc_map_foreign_pages(xch, dom, prot, arr, num); - free(arr); - return ret; -} - /* * Local variables: * mode: C diff --git a/tools/libxc/xc_minios.c b/tools/libxc/xc_minios.c index 3ea3124..d8ca948 100644 --- a/tools/libxc/xc_minios.c +++ b/tools/libxc/xc_minios.c @@ -73,49 +73,6 @@ void *xc_map_foreign_bulk(xc_interface *xch, return map_frames_ex(arr, num, 1, 0, 1, dom, err, pt_prot); } -void *xc_map_foreign_range(xc_interface *xch, - uint32_t dom, - int size, int prot, - unsigned long mfn) -{ - unsigned long pt_prot = 0; - - if (prot & PROT_READ) - pt_prot = L1_PROT_RO; - if (prot & PROT_WRITE) - pt_prot = L1_PROT; - - assert(!(size % getpagesize())); - return map_frames_ex(&mfn, size / getpagesize(), 0, 1, 1, dom, NULL, pt_prot); -} - -void *xc_map_foreign_ranges(xc_interface *xch, - uint32_t dom, - size_t size, int prot, size_t chunksize, - privcmd_mmap_entry_t entries[], int nentries) -{ - unsigned long *mfns; - int i, j, n; - unsigned long pt_prot = 0; - void *ret; - - if (prot & PROT_READ) - pt_prot = L1_PROT_RO; - if (prot & PROT_WRITE) - pt_prot = L1_PROT; - - mfns = malloc((size / XC_PAGE_SIZE) * sizeof(*mfns)); - - n = 0; - for (i = 0; i < nentries; i++) - for (j = 0; j < chunksize / XC_PAGE_SIZE; j++) - mfns[n++] = entries[i].mfn + j; - - ret = map_frames_ex(mfns, n, 1, 0, 1, dom, NULL, pt_prot); - free(mfns); - return ret; -} - /* Optionally flush file to disk and discard page cache */ void discard_file_cache(xc_interface *xch, int fd, int flush) { diff --git a/tools/libxc/xc_netbsd.c b/tools/libxc/xc_netbsd.c index 6a7ff9f..3470bc4 100644 --- a/tools/libxc/xc_netbsd.c +++ b/tools/libxc/xc_netbsd.c @@ -96,76 +96,6 @@ void *osdep_map_foreign_batch(xc_interface *xch, } -void *xc_map_foreign_range(xc_interface *xch, - uint32_t dom, - int size, int prot, - unsigned long mfn) -{ - int fd = xch->privcmdfd; - privcmd_mmap_t ioctlx; - privcmd_mmap_entry_t entry; - void *addr; - addr = mmap(NULL, size, prot, MAP_ANON | MAP_SHARED, -1, 0); - if ( addr == MAP_FAILED ) { - PERROR("xc_map_foreign_range: mmap failed"); - return NULL; - } - - ioctlx.num=1; - ioctlx.dom=dom; - ioctlx.entry=&entry; - entry.va=(unsigned long) addr; - entry.mfn=mfn; - entry.npages=(size+XC_PAGE_SIZE-1)>>XC_PAGE_SHIFT; - if ( ioctl(fd, IOCTL_PRIVCMD_MMAP, &ioctlx) < 0 ) - { - int saved_errno = errno; - PERROR("xc_map_foreign_range: ioctl failed"); - (void)munmap(addr, size); - errno = saved_errno; - return NULL; - } - return addr; -} - -void *xc_map_foreign_ranges(xc_interface *xch, - uint32_t dom, - size_t size, int prot, size_t chunksize, - privcmd_mmap_entry_t entries[], int nentries) -{ - int fd = xch->privcmdfd; - privcmd_mmap_t ioctlx; - int i, rc; - void *addr; - - addr = mmap(NULL, size, prot, MAP_ANON | MAP_SHARED, -1, 0); - if (addr == MAP_FAILED) - goto mmap_failed; - - for (i = 0; i < nentries; i++) { - entries[i].va = (uintptr_t)addr + (i * chunksize); - entries[i].npages = chunksize >> XC_PAGE_SHIFT; - } - - ioctlx.num = nentries; - ioctlx.dom = dom; - ioctlx.entry = entries; - - rc = ioctl(fd, IOCTL_PRIVCMD_MMAP, &ioctlx); - if (rc) - goto ioctl_failed; - - return addr; - -ioctl_failed: - rc = munmap(addr, size); - if (rc == -1) - ERROR("%s: error in error path\n", __FUNCTION__); - -mmap_failed: - return NULL; -} - /* Optionally flush file to disk and discard page cache */ void discard_file_cache(xc_interface *xch, int fd, int flush) { diff --git a/tools/libxc/xc_solaris.c b/tools/libxc/xc_solaris.c index 2df7a06..d686867 100644 --- a/tools/libxc/xc_solaris.c +++ b/tools/libxc/xc_solaris.c @@ -94,73 +94,6 @@ void *osdep_map_foreign_batch(xc_interface *xch, } -void *xc_map_foreign_range(xc_interface *xch, - uint32_t dom, - int size, int prot, - unsigned long mfn) -{ - int fd = xch->privcmdfd; - privcmd_mmap_t ioctlx; - privcmd_mmap_entry_t entry; - void *addr; - addr = mmap(NULL, size, prot, MAP_SHARED, fd, 0); - if ( addr == MAP_FAILED ) - return NULL; - - ioctlx.num=1; - ioctlx.dom=dom; - ioctlx.entry=&entry; - entry.va=(unsigned long) addr; - entry.mfn=mfn; - entry.npages=(size+XC_PAGE_SIZE-1)>>XC_PAGE_SHIFT; - if ( ioctl(fd, IOCTL_PRIVCMD_MMAP, &ioctlx) < 0 ) - { - int saved_errno = errno; - (void)munmap(addr, size); - errno = saved_errno; - return NULL; - } - return addr; -} - -void *xc_map_foreign_ranges(xc_interface *xch, - uint32_t dom, - size_t size, int prot, size_t chunksize, - privcmd_mmap_entry_t entries[], int nentries) -{ - int fd = xch->privcmdfd; - privcmd_mmap_t ioctlx; - int i, rc; - void *addr; - - addr = mmap(NULL, size, prot, MAP_SHARED, fd, 0); - if (addr == MAP_FAILED) - goto mmap_failed; - - for (i = 0; i < nentries; i++) { - entries[i].va = (uintptr_t)addr + (i * chunksize); - entries[i].npages = chunksize >> XC_PAGE_SHIFT; - } - - ioctlx.num = nentries; - ioctlx.dom = dom; - ioctlx.entry = entries; - - rc = ioctl(fd, IOCTL_PRIVCMD_MMAP, &ioctlx); - if (rc) - goto ioctl_failed; - - return addr; - -ioctl_failed: - rc = munmap(addr, size); - if (rc == -1) - PERROR("%s: error in error path", __FUNCTION__); - -mmap_failed: - return NULL; -} - /* Optionally flush file to disk and discard page cache */ void discard_file_cache(xc_interface *xch, int fd, int flush) { -- 2.1.4