Yauheni Kaliuta 1c8f9b91c4 bpf: s390: add JIT support for multi-function programs ... This adds support for bpf-to-bpf function calls in the s390 JIT compiler. The JIT compiler converts the bpf call instructions to native branch instructions. After a round of the usual passes, the start addresses of the JITed images for the callee functions are known. Finally, to fixup the branch target addresses, we need to perform an extra pass. Because of the address range in which JITed images are allocated on s390, the offsets of the start addresses of these images from __bpf_call_base are as large as 64 bits. So, for a function call, the imm field of the instruction cannot be used to determine the callee's address. Use bpf_jit_get_func_addr() helper instead. The patch borrows a lot from: commit 8c11ea5ce1 ("bpf, arm64: fix getting subprog addr from aux for calls") commit e2c95a6165 ("bpf, ppc64: generalize fetching subprog into bpf_jit_get_func_addr") commit 8484ce8306 ("bpf: powerpc64: add JIT support for multi-function programs") (including the commit message). test_verifier (5.3-rc6 with CONFIG_BPF_JIT_ALWAYS_ON=y): without patch: Summary: 1501 PASSED, 0 SKIPPED, 47 FAILED with patch: Summary: 1540 PASSED, 0 SKIPPED, 8 FAILED Signed-off-by: Yauheni Kaliuta <yauheni.kaliuta@redhat.com> Acked-by: Ilya Leoshkevich <iii@linux.ibm.com> Tested-by: Ilya Leoshkevich <iii@linux.ibm.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>		2019-08-31 00:35:50 +02:00
..
appldata	proc/sysctl: add shared variables for range check	2019-07-18 17:08:07 -07:00
boot	s390/boot: add missing declarations and includes	2019-07-29 18:05:02 +02:00
configs	s390: update configs	2019-07-29 18:05:02 +02:00
crypto	s390/crypto: sha: Use -ENODEV instead of -EOPNOTSUPP	2019-06-15 12:24:48 +02:00
hypfs	s390/hypfs: fix a typo in the name of a function	2019-07-23 10:45:32 +02:00
include	s390/boot: add missing declarations and includes	2019-07-29 18:05:02 +02:00
kernel	s390/kexec: add missing include to machine_kexec_reloc.c	2019-07-29 18:05:03 +02:00
kvm	KVM: s390: Use kvm_vcpu_wake_up in kvm_s390_vcpu_wakeup	2019-07-20 09:00:45 +02:00
lib	s390/lib: add missing include	2019-07-29 18:05:02 +02:00
mm	s390/mm: add fallthrough annotations	2019-07-29 18:05:03 +02:00
net	bpf: s390: add JIT support for multi-function programs	2019-08-31 00:35:50 +02:00
numa
oprofile	s390/unwind: introduce stack unwind API	2019-05-02 13:54:11 +02:00
pci	s390 updates for the 5.3 merge window #2	2019-07-12 15:39:22 -07:00
purgatory	s390/purgatory: update .gitignore	2019-06-04 15:03:42 +02:00
scripts	s390: make chkbss work with clang	2019-04-11 13:36:52 +02:00
tools	s390/disassembler: update opcode table	2019-06-04 15:03:58 +02:00
Kbuild
Kconfig	dma-direct: Force unencrypted DMA under SME for certain DMA masks	2019-07-16 22:15:46 +02:00
Kconfig.debug
Makefile	Kconfig updates for v5.3	2019-07-12 16:06:27 -07:00