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/linux/drivers/gpu/drm/tests/
H A Ddrm_gem_shmem_test.c3 * KUnit test suite for GEM objects backed by shmem buffers
38 * Test creating a shmem GEM object backed by shmem buffer. The test
40 * shmem file node and object functions attributes set, and the size
46 struct drm_gem_shmem_object *shmem; in drm_gem_shmem_test_obj_create() local
48 shmem = drm_gem_shmem_create(drm_dev, TEST_SIZE); in drm_gem_shmem_test_obj_create()
49 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, shmem); in drm_gem_shmem_test_obj_create()
50 KUNIT_EXPECT_EQ(test, shmem->base.size, TEST_SIZE); in drm_gem_shmem_test_obj_create()
51 KUNIT_EXPECT_NOT_NULL(test, shmem->base.filp); in drm_gem_shmem_test_obj_create()
52 KUNIT_EXPECT_NOT_NULL(test, shmem->base.funcs); in drm_gem_shmem_test_obj_create()
54 drm_gem_shmem_free(shmem); in drm_gem_shmem_test_obj_create()
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/linux/include/drm/
H A Ddrm_gem_shmem_helper.h21 * struct drm_gem_shmem_object - GEM object backed by shmem
91 * @map_wc: map object write-combined (instead of using shmem defaults).
100 void drm_gem_shmem_free(struct drm_gem_shmem_object *shmem);
102 void drm_gem_shmem_put_pages(struct drm_gem_shmem_object *shmem);
103 int drm_gem_shmem_pin(struct drm_gem_shmem_object *shmem);
104 void drm_gem_shmem_unpin(struct drm_gem_shmem_object *shmem);
105 int drm_gem_shmem_vmap(struct drm_gem_shmem_object *shmem,
107 void drm_gem_shmem_vunmap(struct drm_gem_shmem_object *shmem,
109 int drm_gem_shmem_mmap(struct drm_gem_shmem_object *shmem, struct vm_area_struct *vma);
111 int drm_gem_shmem_pin_locked(struct drm_gem_shmem_object *shmem);
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/linux/arch/riscv/kvm/
H A Dvcpu_sbi_sta.c21 vcpu->arch.sta.shmem = INVALID_GPA; in kvm_riscv_vcpu_sbi_sta_reset()
27 gpa_t shmem = vcpu->arch.sta.shmem; in kvm_riscv_vcpu_record_steal_time() local
38 if (shmem == INVALID_GPA) in kvm_riscv_vcpu_record_steal_time()
42 * shmem is 64-byte aligned (see the enforcement in in kvm_riscv_vcpu_record_steal_time()
46 gfn = shmem >> PAGE_SHIFT; in kvm_riscv_vcpu_record_steal_time()
50 vcpu->arch.sta.shmem = INVALID_GPA; in kvm_riscv_vcpu_record_steal_time()
54 sequence_ptr = (__le32 __user *)(hva + offset_in_page(shmem) + in kvm_riscv_vcpu_record_steal_time()
56 steal_ptr = (__le64 __user *)(hva + offset_in_page(shmem) + in kvm_riscv_vcpu_record_steal_time()
90 gpa_t shmem; in kvm_sbi_sta_steal_time_set_shmem() local
98 vcpu->arch.sta.shmem = INVALID_GPA; in kvm_sbi_sta_steal_time_set_shmem()
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/linux/drivers/gpu/drm/panfrost/
H A Dpanfrost_gem_shrinker.c22 struct drm_gem_shmem_object *shmem; in panfrost_gem_shrinker_count() local
28 list_for_each_entry(shmem, &pfdev->shrinker_list, madv_list) { in panfrost_gem_shrinker_count()
29 if (drm_gem_shmem_is_purgeable(shmem)) in panfrost_gem_shrinker_count()
30 count += shmem->base.size >> PAGE_SHIFT; in panfrost_gem_shrinker_count()
40 struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj); in panfrost_gem_purge() local
50 if (!dma_resv_trylock(shmem->base.resv)) in panfrost_gem_purge()
57 dma_resv_unlock(shmem->base.resv); in panfrost_gem_purge()
68 struct drm_gem_shmem_object *shmem, *tmp; in panfrost_gem_shrinker_scan() local
74 list_for_each_entry_safe(shmem, tmp, &pfdev->shrinker_list, madv_list) { in panfrost_gem_shrinker_scan()
77 if (drm_gem_shmem_is_purgeable(shmem) && in panfrost_gem_shrinker_scan()
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/linux/drivers/firmware/arm_scmi/
H A Dsmc.c
H A Doptee.c
/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.c82 /* shmem reads as 0xFFFFFFFF in the reset case */ in mana_smc_poll_register()
146 u64 *shmem; in mana_smc_setup_hwc() local
186 shmem = (u64 *)ptr; in mana_smc_setup_hwc()
188 *shmem = frame_addr & PAGE_FRAME_L48_MASK; in mana_smc_setup_hwc()
194 shmem = (u64 *)ptr; in mana_smc_setup_hwc()
196 *shmem = frame_addr & PAGE_FRAME_L48_MASK; in mana_smc_setup_hwc()
202 shmem = (u64 *)ptr; in mana_smc_setup_hwc()
204 *shmem = frame_addr & PAGE_FRAME_L48_MASK; in mana_smc_setup_hwc()
210 shmem = (u64 *)ptr; in mana_smc_setup_hwc()
212 *shmem = frame_addr & PAGE_FRAME_L48_MASK; in mana_smc_setup_hwc()
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/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
41 dram_cpu_bpmp_mail: shmem@f1be0000 {
42 compatible = "nvidia,tegra264-bpmp-shmem";
/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>;
H A Darm,mhu.yaml111 shmem = <&cpu_scp_hpri>; /* HP-NonSecure */
145 shmem = <&cpu_scp_lpri0>,
163 shmem = <&cpu_scp_hpri0>,
/linux/drivers/gpu/drm/
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()
89 struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj); in drm_fbdev_shmem_get_page() local
96 page = shmem->pages[i]; // protected by active vmap in drm_fbdev_shmem_get_page()
114 struct drm_gem_shmem_object *shmem; in drm_fbdev_shmem_helper_fb_probe() local
130 shmem = to_drm_gem_shmem_obj(buffer->gem); in drm_fbdev_shmem_helper_fb_probe()
157 if (!shmem->map_wc) in drm_fbdev_shmem_helper_fb_probe()
259 drm_err(dev, "fbdev-shmem: Failed to setup emulation (ret=%d)\n", ret); in drm_fbdev_shmem_client_hotplug()
271 * drm_fbdev_shmem_setup() - Setup fbdev emulation for GEM SHMEM helpers
/linux/Documentation/admin-guide/cgroup-v1/
H A Dmemcg_test.rst108 6. Shmem(tmpfs) Page Cache
111 The best way to understand shmem's page state transition is to read
112 mm/shmem.c.
114 But brief explanation of the behavior of memcg around shmem will be
117 Shmem's page (just leaf page, not direct/indirect block) can be on
119 - radix-tree of shmem's inode.
126 - A new page is added to shmem's radix-tree.
155 9.2 Shmem
158 Historically, memcg's shmem handling was poor and we saw some amount
159 of troubles here. This is because shmem is page-cache but can be
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/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/drivers/gpu/drm/panthor/
H A Dpanthor_gem.c204 struct drm_gem_shmem_object *shmem; in panthor_gem_create_with_handle() local
207 shmem = drm_gem_shmem_create(ddev, *size); in panthor_gem_create_with_handle()
208 if (IS_ERR(shmem)) in panthor_gem_create_with_handle()
209 return PTR_ERR(shmem); in panthor_gem_create_with_handle()
211 bo = to_panthor_bo(&shmem->base); in panthor_gem_create_with_handle()
224 ret = drm_gem_handle_create(file, &shmem->base, handle); in panthor_gem_create_with_handle()
229 drm_gem_object_put(&shmem->base); in panthor_gem_create_with_handle()
/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
81 shmem:
130 - shmem
182 shmem = <&cpu_bpmp_tx>, <&cpu_bpmp_rx>;
/linux/drivers/gpu/drm/virtio/
H A Dvirtgpu_object.c123 struct virtio_gpu_object_shmem *shmem; in virtio_gpu_create_object() local
126 shmem = kzalloc(sizeof(*shmem), GFP_KERNEL); in virtio_gpu_create_object()
127 if (!shmem) in virtio_gpu_create_object()
130 dshmem = &shmem->base.base; in virtio_gpu_create_object()
/linux/tools/testing/selftests/cachestat/
H A Dtest_cachestat.c219 ksft_print_msg("Unable to create shmem file.\n"); in test_cachestat_shmem()
225 ksft_print_msg("Unable to truncate shmem file.\n"); in test_cachestat_shmem()
231 ksft_print_msg("Unable to write to shmem file.\n"); in test_cachestat_shmem()
312 ksft_test_result_pass("cachestat works with a shmem file\n"); in main()
314 ksft_test_result_fail("cachestat fails with a shmem file\n"); in main()
/linux/Documentation/devicetree/bindings/sram/
H A Dsram.yaml87 - amlogic,meson-gxbb-scp-shmem
88 - amlogic,meson-axg-scp-shmem
89 - arm,juno-scp-shmem
90 - arm,scmi-shmem
91 - arm,scp-shmem
/linux/fs/xfs/
H A Dxfs_buf_mem.c26 * requirements. Therefore, the xmbuf mechanism uses an unlinked shmem file to
39 * shmem files used to back an in-memory buffer cache must not be exposed to
130 /* Directly map a shmem page into the buffer cache. */
178 /* Unmap a shmem page that was mapped into the buffer cache. */
/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/firmware/
H A Darm_scpi.c899 { .compatible = "amlogic,meson-gxbb-scp-shmem", },
900 { .compatible = "amlogic,meson-axg-scp-shmem", },
901 { .compatible = "arm,juno-scp-shmem", },
902 { .compatible = "arm,scp-shmem", },
940 struct device_node *shmem = of_parse_phandle(np, "shmem", idx); in scpi_probe() local
942 if (!of_match_node(shmem_of_match, shmem)) in scpi_probe()
945 ret = of_address_to_resource(shmem, 0, &res); in scpi_probe()
946 of_node_put(shmem); in scpi_probe()
/linux/drivers/accel/ivpu/
H A Divpu_gem.c177 struct drm_gem_shmem_object *shmem; in ivpu_bo_alloc() local
188 shmem = drm_gem_shmem_create(&vdev->drm, size); in ivpu_bo_alloc()
189 if (IS_ERR(shmem)) in ivpu_bo_alloc()
190 return ERR_CAST(shmem); in ivpu_bo_alloc()
192 bo = to_ivpu_bo(&shmem->base); in ivpu_bo_alloc()

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