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[59.124.168.89]) by smtp.gmail.com with ESMTPSA id w59sm3804589pjj.13.2021.06.03.23.33.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 03 Jun 2021 23:33:13 -0700 (PDT) From: Kito Cheng To: qemu-devel@nongnu.org, alistair.francis@wdc.com, palmer@dabbelt.com, frank.chang@sifive.com Subject: [PATCH] linux-user/elfload: Implement ELF_HWCAP for RISC-V Date: Fri, 4 Jun 2021 14:33:04 +0800 Message-Id: <20210604063304.48501-1-kito.cheng@sifive.com> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::530; envelope-from=kito.cheng@sifive.com; helo=mail-pg1-x530.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kito Cheng Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" RISC-V define the hwcap as same as content of misa, but it only take lower 26-bits. Signed-off-by: Kito Cheng --- linux-user/elfload.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/linux-user/elfload.c b/linux-user/elfload.c index 17ab06f612..41b9ef72ea 100644 --- a/linux-user/elfload.c +++ b/linux-user/elfload.c @@ -1433,6 +1433,17 @@ static void elf_core_copy_regs(target_elf_gregset_t *regs, #define ELF_CLASS ELFCLASS64 #endif +#define ELF_HWCAP get_elf_hwcap() + +static uint32_t get_elf_hwcap(void) +{ + RISCVCPU *cpu = RISCV_CPU(thread_cpu); + /* Take lower 26 bits from misa. */ + uint32_t hwcap = cpu->env.misa & 0x3ffffff; + + return hwcap; +} + static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) {