From: Jiong Wang <jiong.wang@netronome.com>
To: alexei.starovoitov@gmail.com, daniel@iogearbox.net
Cc: bpf@vger.kernel.org, netdev@vger.kernel.org,
oss-drivers@netronome.com, Jiong Wang <jiong.wang@netronome.com>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>
Subject: [PATCH/RFC v2 bpf-next 15/19] s390: bpf: eliminate zero extension code-gen
Date: Wed, 10 Apr 2019 20:50:29 +0100 [thread overview]
Message-ID: <1554925833-7333-16-git-send-email-jiong.wang@netronome.com> (raw)
In-Reply-To: <1554925833-7333-1-git-send-email-jiong.wang@netronome.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
---
arch/s390/net/bpf_jit_comp.c | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/arch/s390/net/bpf_jit_comp.c b/arch/s390/net/bpf_jit_comp.c
index 51dd026..59592d7 100644
--- a/arch/s390/net/bpf_jit_comp.c
+++ b/arch/s390/net/bpf_jit_comp.c
@@ -299,9 +299,11 @@ static inline void reg_set_seen(struct bpf_jit *jit, u32 b1)
#define EMIT_ZERO(b1) \
({ \
- /* llgfr %dst,%dst (zero extend to 64 bit) */ \
- EMIT4(0xb9160000, b1, b1); \
- REG_SET_SEEN(b1); \
+ if (fp->aux->no_verifier_zext) { \
+ /* llgfr %dst,%dst (zero extend to 64 bit) */ \
+ EMIT4(0xb9160000, b1, b1); \
+ REG_SET_SEEN(b1); \
+ } \
})
/*
@@ -1282,6 +1284,11 @@ static int bpf_jit_prog(struct bpf_jit *jit, struct bpf_prog *fp)
return 0;
}
+bool bpf_jit_hardware_zext(void)
+{
+ return false;
+}
+
/*
* Compile eBPF program "fp"
*/
--
2.7.4
next prev parent reply other threads:[~2019-04-10 19:51 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-10 19:50 [PATCH/RFC v2 bpf-next 00/19] bpf: eliminate zero extensions for sub-register writes Jiong Wang
2019-04-10 19:50 ` [PATCH/RFC v2 bpf-next 01/19] bpf: refactor propagate_liveness to eliminate duplicated for loop Jiong Wang
2019-04-10 19:50 ` [PATCH/RFC v2 bpf-next 02/19] bpf: refactor propagate_liveness to eliminate code redundance Jiong Wang
2019-04-11 2:39 ` [oss-drivers] " Jakub Kicinski
2019-04-10 19:50 ` [PATCH/RFC v2 bpf-next 03/19] bpf: factor out reg and stack slot propagation into "propagate_liveness_reg" Jiong Wang
2019-04-11 2:39 ` [oss-drivers] " Jakub Kicinski
2019-04-10 19:50 ` [PATCH/RFC v2 bpf-next 04/19] bpf: refactor "check_reg_arg" to eliminate code redundancy Jiong Wang
2019-04-11 2:40 ` Jakub Kicinski
2019-04-10 19:50 ` [PATCH/RFC v2 bpf-next 05/19] bpf: split read liveness into REG_LIVE_READ64 and REG_LIVE_READ32 Jiong Wang
2019-04-11 2:52 ` Jakub Kicinski
2019-04-11 6:13 ` Jiong Wang
2019-04-11 16:44 ` [oss-drivers] " Jakub Kicinski
2019-04-11 16:53 ` Jiong Wang
2019-04-12 16:14 ` Jiong Wang
2019-04-11 17:22 ` Jiong Wang
2019-04-10 19:50 ` [PATCH/RFC v2 bpf-next 06/19] bpf: mark lo32 writes that should be zero extended into hi32 Jiong Wang
2019-04-11 3:13 ` Jakub Kicinski
2019-04-11 6:02 ` Jiong Wang
2019-04-10 19:50 ` [PATCH/RFC v2 bpf-next 07/19] bpf: reduce false alarm by refining helper call arg types Jiong Wang
2019-04-10 19:50 ` [PATCH/RFC v2 bpf-next 08/19] bpf: insert explicit zero extension insn when hardware doesn't do it implicitly Jiong Wang
2019-04-10 19:50 ` [PATCH/RFC v2 bpf-next 09/19] bpf: introduce new bpf prog load flags "BPF_F_TEST_RND_HI32" Jiong Wang
2019-04-10 19:50 ` [PATCH/RFC v2 bpf-next 10/19] bpf: randomize high 32-bit when BPF_F_TEST_RND_HI32 is set Jiong Wang
2019-04-10 19:50 ` [PATCH/RFC v2 bpf-next 11/19] libbpf: new global variable "libbpf_test_mode" Jiong Wang
2019-04-11 3:19 ` Jakub Kicinski
2019-04-11 14:32 ` Jiong Wang
2019-04-11 21:49 ` Jiong Wang
2019-04-12 22:08 ` Jiong Wang
2019-04-10 19:50 ` [PATCH/RFC v2 bpf-next 12/19] selftests: enable hi32 randomization for "test_progs" and "test_verifier" Jiong Wang
2019-04-10 19:50 ` [PATCH/RFC v2 bpf-next 13/19] arm: bpf: eliminate zero extension code-gen Jiong Wang
2019-04-10 19:50 ` [PATCH/RFC v2 bpf-next 14/19] powerpc: " Jiong Wang
2019-04-10 19:50 ` Jiong Wang [this message]
2019-04-10 19:50 ` [PATCH/RFC v2 bpf-next 16/19] sparc: " Jiong Wang
2019-04-10 19:50 ` [PATCH/RFC v2 bpf-next 17/19] x32: " Jiong Wang
2019-04-10 19:50 ` [PATCH/RFC v2 bpf-next 18/19] riscv: " Jiong Wang
2019-04-10 19:50 ` [PATCH/RFC v2 bpf-next 19/19] nfp: " Jiong Wang
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