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[81.140.166.164]) by smtp.gmail.com with ESMTPSA id e18sm8643101wrr.95.2020.01.09.08.06.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 09 Jan 2020 08:06:22 -0800 (PST) From: Julien Thierry To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: jpoimboe@redhat.com, peterz@infradead.org, raphael.gault@arm.com, catalin.marinas@arm.com, will@kernel.org, Julien Thierry Subject: [RFC v5 27/57] objtool: arm64: Decode instruction triggering context switch Date: Thu, 9 Jan 2020 16:02:30 +0000 Message-Id: <20200109160300.26150-28-jthierry@redhat.com> X-Mailer: git-send-email 2.21.1 In-Reply-To: <20200109160300.26150-1-jthierry@redhat.com> References: <20200109160300.26150-1-jthierry@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Decode instructions that volutarily trigger an exception to change the context of execution. Suggested-by: Raphael Gault Signed-off-by: Julien Thierry --- tools/objtool/arch/arm64/decode.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/tools/objtool/arch/arm64/decode.c b/tools/objtool/arch/arm64/decode.c index 1609750cc4b9..5eba83c5d5bc 100644 --- a/tools/objtool/arch/arm64/decode.c +++ b/tools/objtool/arch/arm64/decode.c @@ -508,6 +508,10 @@ int arm_decode_except_gen(u32 instr, enum insn_type *type, #define INSN_HVC 0b00000010 #define INSN_SMC 0b00000011 #define INSN_BRK 0b00100000 +#define INSN_HLT 0b01000000 +#define INSN_DCPS1 0b10100001 +#define INSN_DCPS2 0b10100010 +#define INSN_DCPS3 0b10100011 switch (decode_field) { case INSN_SVC: @@ -551,6 +555,13 @@ int arm_decode_except_gen(u32 instr, enum insn_type *type, break; } return 0; + case INSN_HLT: + case INSN_DCPS1: + case INSN_DCPS2: + case INSN_DCPS3: + *immediate = imm16; + *type = INSN_CONTEXT_SWITCH; + return 0; default: return arm_decode_unknown(instr, type, immediate, ops_list); } -- 2.21.0