GuillaumeHemmen/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2024-11-01 13:03:25 +01:00
Code Issues Projects Releases Packages Wiki Activity

libbpf, selftests/bpf: Adjust libbpf, bpftool, selftests to match LLVM

Browse source 
The selftests use
to tell LLVM about special pointers. For LLVM there is nothing "arena"
about them. They are simply pointers in a different address space.
Hence LLVM diff https://github.com/llvm/llvm-project/pull/85161 renamed:
. macro __BPF_FEATURE_ARENA_CAST -> __BPF_FEATURE_ADDR_SPACE_CAST
. global variables in __attribute__((address_space(N))) are now
  placed in section named ".addr_space.N" instead of ".arena.N".

Adjust libbpf, bpftool, and selftests to match LLVM.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Stanislav Fomichev <sdf@google.com>
Link: https://lore.kernel.org/bpf/20240315021834.62988-3-alexei.starovoitov@gmail.com
This commit is contained in:
Alexei Starovoitov 2024-03-14 19:18:32 -07:00 committed by Andrii Nakryiko
parent ee498a38f3
commit 10ebe835c9
6 changed files with 11 additions and 11 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
tools/bpf/bpftool/gen.c
View file

@ -121,7 +121,7 @@ static bool get_datasec_ident(const char *sec_name, char *buf, size_t buf_sz)
int i, n;
/* recognize hard coded LLVM section name */
if (strcmp(sec_name, ".arena.1") == 0) {
if (strcmp(sec_name, ".addr_space.1") == 0) {
/* this is the name to use in skeleton */
snprintf(buf, buf_sz, "arena");
return true;

2
tools/lib/bpf/libbpf.c
View file

@ -498,7 +498,7 @@ struct bpf_struct_ops {
#define KSYMS_SEC ".ksyms"
#define STRUCT_OPS_SEC ".struct_ops"
#define STRUCT_OPS_LINK_SEC ".struct_ops.link"
#define ARENA_SEC ".arena.1"
#define ARENA_SEC ".addr_space.1"
enum libbpf_map_type {
LIBBPF_MAP_UNSPEC,

2
tools/testing/selftests/bpf/bpf_arena_common.h
View file

@ -32,7 +32,7 @@
*/
#endif
#if defined(__BPF_FEATURE_ARENA_CAST) && !defined(BPF_ARENA_FORCE_ASM)
#if defined(__BPF_FEATURE_ADDR_SPACE_CAST) && !defined(BPF_ARENA_FORCE_ASM)
#define __arena __attribute__((address_space(1)))
#define cast_kern(ptr) /* nop for bpf prog. emitted by LLVM */
#define cast_user(ptr) /* nop for bpf prog. emitted by LLVM */

2
tools/testing/selftests/bpf/progs/arena_htab.c
View file

@ -22,7 +22,7 @@ int zero = 0;
SEC("syscall")
int arena_htab_llvm(void *ctx)
{
#if defined(__BPF_FEATURE_ARENA_CAST) || defined(BPF_ARENA_FORCE_ASM)
#if defined(__BPF_FEATURE_ADDR_SPACE_CAST) || defined(BPF_ARENA_FORCE_ASM)
struct htab __arena *htab;
__u64 i;

10
tools/testing/selftests/bpf/progs/arena_list.c
View file

@ -30,13 +30,13 @@ int list_sum;
int cnt;
bool skip = false;
#ifdef __BPF_FEATURE_ARENA_CAST
#ifdef __BPF_FEATURE_ADDR_SPACE_CAST
long __arena arena_sum;
int __arena test_val = 1;
struct arena_list_head __arena global_head;
#else
long arena_sum SEC(".arena.1");
int test_val SEC(".arena.1");
long arena_sum SEC(".addr_space.1");
int test_val SEC(".addr_space.1");
#endif
int zero;
@ -44,7 +44,7 @@ int zero;
SEC("syscall")
int arena_list_add(void *ctx)
{
#ifdef __BPF_FEATURE_ARENA_CAST
#ifdef __BPF_FEATURE_ADDR_SPACE_CAST
__u64 i;
list_head = &global_head;
@ -66,7 +66,7 @@ int arena_list_add(void *ctx)
SEC("syscall")
int arena_list_del(void *ctx)
{
#ifdef __BPF_FEATURE_ARENA_CAST
#ifdef __BPF_FEATURE_ADDR_SPACE_CAST
struct elem __arena *n;
int sum = 0;

4
tools/testing/selftests/bpf/progs/verifier_arena.c
View file

@ -19,7 +19,7 @@ SEC("syscall")
__success __retval(0)
int basic_alloc1(void *ctx)
{
#if defined(__BPF_FEATURE_ARENA_CAST)
#if defined(__BPF_FEATURE_ADDR_SPACE_CAST)
volatile int __arena *page1, *page2, *no_page, *page3;
page1 = bpf_arena_alloc_pages(&arena, NULL, 1, NUMA_NO_NODE, 0);
@ -58,7 +58,7 @@ SEC("syscall")
__success __retval(0)
int basic_alloc2(void *ctx)
{
#if defined(__BPF_FEATURE_ARENA_CAST)
#if defined(__BPF_FEATURE_ADDR_SPACE_CAST)
volatile char __arena *page1, *page2, *page3, *page4;
page1 = bpf_arena_alloc_pages(&arena, NULL, 2, NUMA_NO_NODE, 0);