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This commit is contained in:
Bernhard Stoeckner
2025-01-16 17:34:27 +01:00
parent 8845de1ce4
commit 855c3c9d3c
42 changed files with 472 additions and 94 deletions
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1
kernel-open/nvidia-uvm/nvidia-uvm.Kbuild
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@@ -86,6 +86,7 @@ NV_CONFTEST_FUNCTION_COMPILE_TESTS += mmget_not_zero
NV_CONFTEST_FUNCTION_COMPILE_TESTS += mmgrab
NV_CONFTEST_FUNCTION_COMPILE_TESTS += iommu_sva_bind_device_has_drvdata_arg
NV_CONFTEST_FUNCTION_COMPILE_TESTS += vm_fault_to_errno
NV_CONFTEST_FUNCTION_COMPILE_TESTS += folio_test_swapcache
NV_CONFTEST_TYPE_COMPILE_TESTS += backing_dev_info
NV_CONFTEST_TYPE_COMPILE_TESTS += mm_context_t

3
kernel-open/nvidia-uvm/uvm.c
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@@ -682,6 +682,9 @@ static void uvm_vm_open_semaphore_pool(struct vm_area_struct *vma)
// Semaphore pool vmas do not have vma wrappers, but some functions will
// assume vm_private_data is a wrapper.
vma->vm_private_data = NULL;
#if defined(VM_WIPEONFORK)
nv_vm_flags_set(vma, VM_WIPEONFORK);
#endif
if (is_fork) {
// If we forked, leave the parent vma alone.

20
kernel-open/nvidia-uvm/uvm_hmm.c
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@@ -71,6 +71,24 @@ module_param(uvm_disable_hmm, bool, 0444);
#include "uvm_va_policy.h"
#include "uvm_tools.h"
// The function nv_PageSwapCache() wraps the check for page swap cache flag in
// order to support a wide variety of kernel versions.
// The function PageSwapCache() is removed after 32f51ead3d77 ("mm: remove
// PageSwapCache") in v6.12-rc1.
// The function folio_test_swapcache() was added in Linux 5.16 (d389a4a811551
// "mm: Add folio flag manipulation functions")
// Systems with HMM patches backported to 5.14 are possible, but those systems
// do not include folio_test_swapcache()
// TODO: Bug 4050579: Remove this when migration of swap cached pages is updated
static __always_inline bool nv_PageSwapCache(struct page *page)
{
#if defined(NV_FOLIO_TEST_SWAPCACHE_PRESENT)
return folio_test_swapcache(page_folio(page));
#else
return PageSwapCache(page);
#endif
}
static NV_STATUS gpu_chunk_add(uvm_va_block_t *va_block,
uvm_page_index_t page_index,
struct page *page);
@@ -2554,7 +2572,7 @@ static NV_STATUS dmamap_src_sysmem_pages(uvm_va_block_t *va_block,
continue;
}
if (PageSwapCache(src_page)) {
if (nv_PageSwapCache(src_page)) {
// TODO: Bug 4050579: Remove this when swap cached pages can be
// migrated.
if (service_context) {

2
kernel-open/nvidia-uvm/uvm_kvmalloc.c
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@@ -36,7 +36,7 @@
typedef struct
{
size_t alloc_size;
uint8_t ptr[0];
uint8_t ptr[];
} uvm_vmalloc_hdr_t;
typedef struct

2
kernel-open/nvidia-uvm/uvm_mmu.h
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@@ -162,7 +162,7 @@ struct uvm_page_directory_struct
// pointers to child directories on the host.
// this array is variable length, so it needs to be last to allow it to
// take up extra space
uvm_page_directory_t *entries[0];
uvm_page_directory_t *entries[];
};
enum

2
kernel-open/nvidia-uvm/uvm_pmm_gpu.c
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@@ -221,7 +221,7 @@ struct uvm_pmm_gpu_chunk_suballoc_struct
// Array of all child subchunks
// TODO: Bug 1765461: Can the array be inlined? It could save the parent
// pointer.
uvm_gpu_chunk_t *subchunks[0];
uvm_gpu_chunk_t *subchunks[];
};
typedef enum