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/linux/drivers/gpu/drm/
H A Ddrm_gem_shmem_helper.c33 * This library provides helpers for GEM objects backed by shmem buffers
54 static int __drm_gem_shmem_init(struct drm_device *dev, struct drm_gem_shmem_object *shmem, in __drm_gem_shmem_init() argument
57 struct drm_gem_object *obj = &shmem->base; in __drm_gem_shmem_init()
65 shmem->map_wc = false; /* dma-buf mappings use always writecombine */ in __drm_gem_shmem_init()
78 INIT_LIST_HEAD(&shmem->madv_list); in __drm_gem_shmem_init()
101 * @shmem: shmem GEM object to initialize
104 * This function initializes an allocated shmem GEM object.
109 int drm_gem_shmem_init(struct drm_device *dev, struct drm_gem_shmem_object *shmem, size_t size) in drm_gem_shmem_init() argument
111 return __drm_gem_shmem_init(dev, shmem, size, false); in drm_gem_shmem_init()
118 struct drm_gem_shmem_object *shmem; in __drm_gem_shmem_create() local
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H A Ddrm_fbdev_shmem.c48 struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj); in drm_fbdev_shmem_fb_mmap() local
50 if (shmem->map_wc) in drm_fbdev_shmem_fb_mmap()
87 struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj); in drm_fbdev_shmem_get_page() local
94 page = shmem->pages[i]; // protected by active vmap in drm_fbdev_shmem_get_page()
140 struct drm_gem_shmem_object *shmem; in drm_fbdev_shmem_driver_fbdev_probe() local
155 shmem = to_drm_gem_shmem_obj(buffer->gem); in drm_fbdev_shmem_driver_fbdev_probe()
177 if (!shmem->map_wc) in drm_fbdev_shmem_driver_fbdev_probe()
/linux/drivers/gpu/drm/tests/
H A Ddrm_gem_shmem_test.c3 * KUnit test suite for GEM objects backed by shmem buffers
43 * Test creating a shmem GEM object backed by shmem buffer. The test
45 * shmem file node and object functions attributes set, and the size
51 struct drm_gem_shmem_object *shmem; in drm_gem_shmem_test_obj_create() local
53 shmem = drm_gem_shmem_create(drm_dev, TEST_SIZE); in drm_gem_shmem_test_obj_create()
54 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, shmem); in drm_gem_shmem_test_obj_create()
55 KUNIT_EXPECT_EQ(test, shmem->base.size, TEST_SIZE); in drm_gem_shmem_test_obj_create()
56 KUNIT_EXPECT_NOT_NULL(test, shmem->base.filp); in drm_gem_shmem_test_obj_create()
57 KUNIT_EXPECT_NOT_NULL(test, shmem->base.funcs); in drm_gem_shmem_test_obj_create()
59 drm_gem_shmem_free(shmem); in drm_gem_shmem_test_obj_create()
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/linux/drivers/gpu/drm/panthor/
H A Dpanthor_gem.c86 * because the zeroing done by the shmem layer at page allocation in should_map_wc()
266 struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj); in panthor_gem_prime_begin_cpu_access() local
270 if (shmem->sgt) in panthor_gem_prime_begin_cpu_access()
271 dma_sync_sgtable_for_cpu(dev->dev, shmem->sgt, dir); in panthor_gem_prime_begin_cpu_access()
273 if (shmem->vaddr) in panthor_gem_prime_begin_cpu_access()
274 invalidate_kernel_vmap_range(shmem->vaddr, shmem->base.size); in panthor_gem_prime_begin_cpu_access()
293 struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj); in panthor_gem_prime_end_cpu_access() local
304 if (shmem->vaddr) in panthor_gem_prime_end_cpu_access()
305 flush_kernel_vmap_range(shmem->vaddr, shmem->base.size); in panthor_gem_prime_end_cpu_access()
307 if (shmem->sgt) in panthor_gem_prime_end_cpu_access()
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/linux/drivers/net/arcnet/
H A Dcom90xx.c44 * shmem are left in the list at Stage 5, they must correspond to each
58 static int com90xx_found(int ioaddr, int airq, u_long shmem, void __iomem *);
86 static int io; /* use the insmod io= irq= shmem= options */
88 static int shmem; variable
93 module_param(shmem, int, 0);
107 if (!io && !irq && !shmem && !*device && com90xx_skip_probe) in com90xx_probe()
131 if (shmem) in com90xx_probe()
132 shmems[numshmems++] = shmem; in com90xx_probe()
203 /* Stage 3: abandon any shmem addresses that don't have the signature in com90xx_probe()
243 * sure no "mirror" shmem areas show up - if they occur in com90xx_probe()
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H A Darc-rimi.c65 * need to be passed a specific shmem address, IRQ, and node ID.
72 pr_info("Given: node %02Xh, shmem %lXh, irq %d\n", in arcrimi_probe()
78 pr_err("No autoprobe for RIM I; you must specify the shmem and irq!\n"); in arcrimi_probe()
126 unsigned long first_mirror, last_mirror, shmem; in arcrimi_found() local
146 shmem = dev->mem_start; in arcrimi_found()
159 check_mirror(shmem - MIRROR_SIZE, MIRROR_SIZE) == 0 && in arcrimi_found()
160 check_mirror(shmem - 2 * MIRROR_SIZE, MIRROR_SIZE) == 1) in arcrimi_found()
163 first_mirror = shmem - mirror_size; in arcrimi_found()
168 last_mirror = shmem + mirror_size; in arcrimi_found()
194 release_mem_region(shmem, MIRROR_SIZE); in arcrimi_found()
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/linux/drivers/net/ethernet/microsoft/mana/
H A Dshm_channel.c77 /* shmem reads as 0xFFFFFFFF in the reset case */ in mana_smc_poll_register()
141 u64 *shmem; in mana_smc_setup_hwc() local
181 shmem = (u64 *)ptr; in mana_smc_setup_hwc()
183 *shmem = frame_addr & PAGE_FRAME_L48_MASK; in mana_smc_setup_hwc()
189 shmem = (u64 *)ptr; in mana_smc_setup_hwc()
191 *shmem = frame_addr & PAGE_FRAME_L48_MASK; in mana_smc_setup_hwc()
197 shmem = (u64 *)ptr; in mana_smc_setup_hwc()
199 *shmem = frame_addr & PAGE_FRAME_L48_MASK; in mana_smc_setup_hwc()
205 shmem = (u64 *)ptr; in mana_smc_setup_hwc()
207 *shmem = frame_addr & PAGE_FRAME_L48_MASK; in mana_smc_setup_hwc()
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/linux/Documentation/devicetree/bindings/mailbox/
H A Dmailbox.txt26 - shmem : List of phandle pointing to the shared memory(SHM) area between the
39 Example with shared memory(shmem):
49 cl_shmem: shmem@0 {
50 compatible = "client-shmem";
58 shmem = <&cl_shmem>;
/linux/Documentation/devicetree/bindings/reserved-memory/
H A Dnvidia,tegra264-bpmp-shmem.yaml4 $id: http://devicetree.org/schemas/reserved-memory/nvidia,tegra264-bpmp-shmem.yaml#
17 The sub-node is named shmem@<address>.
24 const: nvidia,tegra264-bpmp-shmem
42 shmem@f1be0000 {
43 compatible = "nvidia,tegra264-bpmp-shmem";
/linux/arch/arm64/boot/dts/arm/
H A Djuno-scmi.dtsi49 shmem = <&cpu_scp_lpri0 &cpu_scp_lpri1>;
63 shmem = <&cpu_scp_hpri0 &cpu_scp_hpri1>;
205 compatible = "arm,scmi-shmem";
210 compatible = "arm,scmi-shmem";
215 compatible = "arm,scmi-shmem";
220 compatible = "arm,scmi-shmem";
/linux/Documentation/admin-guide/mm/
H A Dtranshuge.rst15 Currently THP only works for anonymous memory mappings and tmpfs/shmem.
373 allocation policy for the internal shmem mount by using the kernel parameter
375 seven valid policies for shmem (``always``, ``within_size``, ``advise``,
385 policies for shmem (``CONFIG_TRANSPARENT_HUGEPAGE_SHMEM_HUGE_*``) and tmpfs
390 size, ``thp_shmem`` controls each supported shmem THP size. ``thp_shmem``
395 as required. If ``thp_shmem=`` is specified at least once, any shmem THP
406 Hugepages in tmpfs/shmem
415 shmem mount (see below), ordinary tmpfs mounts will make use of all available
464 shmem / internal tmpfs
558 is incremented every time a shmem huge page is successfully
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/linux/drivers/platform/x86/amd/hfi/
H A Dhfi.c75 struct amd_shmem_info *shmem; member
154 memcpy_fromio(amd_hfi_data->shmem, pcc_comm_addr, pcct_ext->length); in amd_hfi_fill_metadata()
157 if (amd_hfi_data->shmem->header.signature != PCC_SIGNATURE) { in amd_hfi_fill_metadata()
161 if (amd_hfi_data->shmem->version_number != AMD_HETERO_RANKING_TABLE_VER) { in amd_hfi_fill_metadata()
163 amd_hfi_data->shmem->version_number); in amd_hfi_fill_metadata()
167 for (unsigned int i = 0; i < amd_hfi_data->shmem->n_bitmaps; i++) { in amd_hfi_fill_metadata()
168 u32 bitmap = amd_hfi_data->shmem->table_data[i]; in amd_hfi_fill_metadata()
191 u32 *table = amd_hfi_data->shmem->table_data + in amd_hfi_fill_metadata()
192 amd_hfi_data->shmem->n_bitmaps + in amd_hfi_fill_metadata()
383 amd_hfi_data->shmem = devm_kzalloc(amd_hfi_data->dev, pcct_ext->length, GFP_KERNEL); in amd_hfi_metadata_parser()
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/linux/rust/kernel/drm/gem/
H A Dshmem.rs3 //! DRM GEM shmem helper objects
38 /// A struct for controlling the creation of shmem-backed GEM objects.
41 /// initially creating a shmem-backed GEM object.
53 /// A shmem-backed GEM object.
79 /// `drm_gem_object_funcs` vtable suitable for GEM shmem objects.
105 /// Create a new shmem-backed DRM object of the given size.
144 let shmem = unsafe { &mut *obj.as_raw_shmem() }; in new() localVariable
145 shmem.set_map_wc(config.map_wc); in new()
/linux/Documentation/devicetree/bindings/firmware/
H A Darm,scpi.yaml48 shmem:
170 - shmem
178 shmem = <&cpu_scp_hpri>; /* HP-NonSecure */
225 compatible = "arm,scp-shmem";
230 compatible = "arm,scp-shmem";
241 shmem = <&cpu_scp_lpri>, <&cpu_scp_hpri>;
H A Dnvidia,tegra186-bpmp.yaml63 See "../reserved-memory/nvidia,tegra264-bpmp-shmem.yaml" for bindings for
82 shmem:
131 - shmem
183 shmem = <&cpu_bpmp_tx>, <&cpu_bpmp_rx>;
/linux/tools/testing/selftests/kvm/
H A Dsteal_time.c241 /* SBI STA shmem must have 64-byte alignment */
340 u64 shmem; in check_steal_time_uapi() local
350 reg.addr = (u64)&shmem; in check_steal_time_uapi()
352 shmem = ST_GPA_BASE + 1; in check_steal_time_uapi()
355 "misaligned STA shmem returns -EINVAL"); in check_steal_time_uapi()
357 shmem = ST_GPA_BASE; in check_steal_time_uapi()
360 "aligned STA shmem succeeds"); in check_steal_time_uapi()
362 shmem = INVALID_GPA; in check_steal_time_uapi()
365 "all-ones for STA shmem succeeds"); in check_steal_time_uapi()
/linux/mm/
H A Dmincore.c61 static unsigned char mincore_swap(swp_entry_t entry, bool shmem) in mincore_swap() argument
73 * Shmem mapping may contain swapin error entries, which are in mincore_swap()
78 return !shmem; in mincore_swap()
81 * Shmem mapping lookup is lockless, so we need to grab the swap in mincore_swap()
85 if (shmem) { in mincore_swap()
91 if (shmem) in mincore_swap()
/linux/drivers/gpu/drm/virtio/
H A Dvirtgpu_object.c149 struct virtio_gpu_object_shmem *shmem; in virtio_gpu_create_object() local
152 shmem = kzalloc_obj(*shmem); in virtio_gpu_create_object()
153 if (!shmem) in virtio_gpu_create_object()
156 dshmem = &shmem->base.base; in virtio_gpu_create_object()
/linux/drivers/gpu/drm/lima/
H A Dlima_gem.c113 struct drm_gem_shmem_object *shmem; in lima_gem_create_handle() local
118 shmem = drm_gem_shmem_create(dev, size); in lima_gem_create_handle()
119 if (IS_ERR(shmem)) in lima_gem_create_handle()
120 return PTR_ERR(shmem); in lima_gem_create_handle()
122 obj = &shmem->base; in lima_gem_create_handle()
136 struct sg_table *sgt = drm_gem_shmem_get_pages_sgt(shmem); in lima_gem_create_handle()
/linux/include/uapi/linux/
H A Duserfaultfd.h196 * UFFD_FEATURE_MISSING_HUGETLBFS, but it applies to shmem
197 * (i.e. tmpfs and other shmem based APIs).
211 * UFFD_FEATURE_MINOR_HUGETLBFS, but for shmem-backed pages instead.
218 * write-protection mode is supported on both shmem and hugetlbfs.
222 * (i.e. empty ptes). This will be the default behavior for shmem
/linux/drivers/mailbox/
H A Dpcc.c295 pcc_hdr = pchan->chan.shmem; in pcc_chan_acknowledge()
379 pcc_mchan->shmem = acpi_os_ioremap(pcc_mchan->shmem_base_addr, in pcc_mbox_request_channel()
381 if (!pcc_mchan->shmem) in pcc_mbox_request_channel()
386 iounmap(pcc_mchan->shmem); in pcc_mbox_request_channel()
387 pcc_mchan->shmem = NULL; in pcc_mbox_request_channel()
411 if (pcc_mbox_chan->shmem) { in pcc_mbox_free_channel()
412 iounmap(pcc_mbox_chan->shmem); in pcc_mbox_free_channel()
413 pcc_mbox_chan->shmem = NULL; in pcc_mbox_free_channel()
/linux/arch/arm64/boot/dts/blaize/
H A Dblaize-blzp1600.dtsi50 shmem = <&scmi0_shm>;
82 scmi0_shm: scmi-shmem@800 {
83 compatible = "arm,scmi-shmem";
/linux/drivers/firmware/tegra/
H A Dbpmp-tegra186.c236 priv->tx.pool = of_gen_pool_get(bpmp->dev->of_node, "shmem", 0); in tegra186_bpmp_sram_init()
238 dev_err(bpmp->dev, "TX shmem pool not found\n"); in tegra186_bpmp_sram_init()
249 priv->rx.pool = of_gen_pool_get(bpmp->dev->of_node, "shmem", 1); in tegra186_bpmp_sram_init()
251 dev_err(bpmp->dev, "RX shmem pool not found\n"); in tegra186_bpmp_sram_init()
/linux/drivers/firmware/
H A Darm_scpi.c903 { .compatible = "amlogic,meson-gxbb-scp-shmem", },
904 { .compatible = "amlogic,meson-axg-scp-shmem", },
905 { .compatible = "arm,juno-scp-shmem", },
906 { .compatible = "arm,scp-shmem", },
944 struct device_node *shmem __free(device_node) = in scpi_probe()
945 of_parse_phandle(np, "shmem", idx); in scpi_probe()
947 if (!of_match_node(shmem_of_match, shmem)) in scpi_probe()
950 ret = of_address_to_resource(shmem, 0, &res); in scpi_probe()
/linux/Documentation/translations/zh_CN/filesystems/
H A Dtmpfs.rst26 中显示为“Shmem”，而在free(1)中显示为“Shared”。请注意，这些计数还包括
27 共享内存(shmem，请参阅ipcs(1))。获得计数的最可靠方法是使用df(1)和du(1)。

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