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llvmpipe: page-align memory allocations

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Allows memory allocated by llvmpipe_allocate_memory_fd to be
mappable to guests in virtualized environments like KVM which
requires page-aligned memory.

llvmpipe_allocate_memory is updated similarly for consistency.

Signed-off-by: Omar Akkila <omar.akkila@collabora.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13793>
This commit is contained in:
Omar Akkila 2021-11-12 12:51:26 -05:00
parent 23a5f1a5ac
commit 58a0d8d0de
1 changed files with 8 additions and 2 deletions
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10
src/gallium/drivers/llvmpipe/lp_texture.c
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@ -950,7 +950,10 @@ llvmpipe_memory_barrier(struct pipe_context *pipe,
static struct pipe_memory_allocation *llvmpipe_allocate_memory(struct pipe_screen *screen, uint64_t size)
{
return os_malloc_aligned(size, 256);
uint64_t alignment;
if (!os_get_page_size(&alignment))
alignment = 256;
return os_malloc_aligned(size, alignment);
}
static void llvmpipe_free_memory(struct pipe_screen *screen,
@ -965,7 +968,10 @@ static const char *driver_id = "llvmpipe" MESA_GIT_SHA1;
static struct pipe_memory_allocation *llvmpipe_allocate_memory_fd(struct pipe_screen *screen, uint64_t size, int *fd)
{
return os_malloc_aligned_fd(size, 256, fd, "llvmpipe memory fd", driver_id);
uint64_t alignment;
if (!os_get_page_size(&alignment))
alignment = 256;
return os_malloc_aligned_fd(size, alignment, fd, "llvmpipe memory fd", driver_id);
}
static bool llvmpipe_import_memory_fd(struct pipe_screen *screen, int fd, struct pipe_memory_allocation **ptr, uint64_t *size)