| Message ID | e109f98617eacb4512c17a48525e94eda42889e6.1644834730.git.naveen.n.rao@linux.vnet.ibm.com (mailing list archive) |
|---|---|
| State | Accepted |
| Headers | show
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Rao" <naveen.n.rao@linux.vnet.ibm.com> To: Michael Ellerman <mpe@ellerman.id.au> Subject: [PATCH powerpc/next 05/17] powerpc64/bpf: Use r12 for constant blinding Date: Mon, 14 Feb 2022 16:11:39 +0530 Message-Id: <e109f98617eacb4512c17a48525e94eda42889e6.1644834730.git.naveen.n.rao@linux.vnet.ibm.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <cover.1644834730.git.naveen.n.rao@linux.vnet.ibm.com> References: <cover.1644834730.git.naveen.n.rao@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 0QpUWiOGPIBfU5ZR1n02rz58kPxBUOvK X-Proofpoint-ORIG-GUID: aOcz7zg4bn0UXylnR1suEORZUzUO2CSf X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.816,Hydra:6.0.425,FMLib:17.11.62.513 definitions=2022-02-14_02,2022-02-14_03,2021-12-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 mlxscore=0 lowpriorityscore=0 clxscore=1015 mlxlogscore=999 priorityscore=1501 malwarescore=0 phishscore=0 suspectscore=0 spamscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2201110000 definitions=main-2202140064 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List <linuxppc-dev.lists.ozlabs.org> List-Unsubscribe: <https://lists.ozlabs.org/options/linuxppc-dev>, <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=unsubscribe> List-Archive: <http://lists.ozlabs.org/pipermail/linuxppc-dev/> List-Post: <mailto:linuxppc-dev@lists.ozlabs.org> List-Help: <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=help> List-Subscribe: <https://lists.ozlabs.org/listinfo/linuxppc-dev>, <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=subscribe> Cc: Daniel Borkmann <daniel@iogearbox.net>, Yauheni Kaliuta <yauheni.kaliuta@redhat.com>, bpf@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, Alexei Starovoitov <alexei.starovoitov@gmail.com>, Hari Bathini <hbathini@linux.ibm.com> Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" <linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org> |
| Series |
powerpc/bpf: Some updates and cleanups
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expand
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diff --git a/arch/powerpc/net/bpf_jit64.h b/arch/powerpc/net/bpf_jit64.h index b63b35e45e558c..82cdfee412784a 100644 --- a/arch/powerpc/net/bpf_jit64.h +++ b/arch/powerpc/net/bpf_jit64.h @@ -56,7 +56,7 @@ const int b2p[MAX_BPF_JIT_REG + 2] = { /* frame pointer aka BPF_REG_10 */ [BPF_REG_FP] = 31, /* eBPF jit internal registers */ - [BPF_REG_AX] = 2, + [BPF_REG_AX] = 12, [TMP_REG_1] = 9, [TMP_REG_2] = 10 };
In preparation for preserving kernel toc in r2, switch BPF_REG_AX from r2 to r12. r12 is not used by bpf JIT except during external helper/bpf calls, or with BPF_NOSPEC. These sequences aren't emitted when BPF_REG_AX is used for constant blinding and other purposes. Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> --- arch/powerpc/net/bpf_jit64.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)