From patchwork Thu Dec 29 09:18:23 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bin Meng X-Patchwork-Id: 13083366 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 97B18C4332F for ; Thu, 29 Dec 2022 09:21:51 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pAp5z-0000nP-D4; Thu, 29 Dec 2022 04:21:03 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pAp5h-0000f3-3g for qemu-devel@nongnu.org; Thu, 29 Dec 2022 04:20:49 -0500 Received: from bg4.exmail.qq.com ([43.155.65.254]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pAp5e-0001RU-ST for qemu-devel@nongnu.org; Thu, 29 Dec 2022 04:20:44 -0500 X-QQ-Spam: true X-QQ-mid: bizesmtp73t1672305531tygke2oe Received: from ubuntu.. ( [111.196.135.79]) by bizesmtp.qq.com (ESMTP) with id ; Thu, 29 Dec 2022 17:18:50 +0800 (CST) X-QQ-SSF: 01200000000000C0C000000A0000000 From: Bin Meng To: Alistair Francis , qemu-devel@nongnu.org Cc: Daniel Henrique Barboza , Alistair Francis , =?utf-8?q?Marc-Andr=C3=A9_Lure?= =?utf-8?q?au?= , Paolo Bonzini Subject: [PATCH v2 07/12] hw/char: riscv_htif: Support console output via proxy syscall Date: Thu, 29 Dec 2022 17:18:23 +0800 Message-Id: <20221229091828.1945072-8-bmeng@tinylab.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221229091828.1945072-1-bmeng@tinylab.org> References: <20221229091828.1945072-1-bmeng@tinylab.org> MIME-Version: 1.0 X-QQ-SENDSIZE: 520 Feedback-ID: bizesmtp:tinylab.org:qybglogicsvr:qybglogicsvr3 Received-SPF: pass client-ip=43.155.65.254; envelope-from=bmeng@tinylab.org; helo=bg4.exmail.qq.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_MSPIKE_H2=-0.001, 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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org At present the HTIF proxy syscall is unsupported. On RV32, only device 0 is supported so there is no console device for RV32. The only way to implement console funtionality on RV32 is to support the SYS_WRITE syscall. With this commit, the Spike machine is able to boot the 32-bit OpenSBI generic image. Signed-off-by: Bin Meng Reviewed-by: Daniel Henrique Barboza Reviewed-by: Alistair Francis --- (no changes since v1) hw/char/riscv_htif.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) diff --git a/hw/char/riscv_htif.c b/hw/char/riscv_htif.c index 3bb0a37a3e..1477fc0090 100644 --- a/hw/char/riscv_htif.c +++ b/hw/char/riscv_htif.c @@ -48,6 +48,9 @@ #define HTIF_CONSOLE_CMD_GETC 0 #define HTIF_CONSOLE_CMD_PUTC 1 +/* PK system call number */ +#define PK_SYS_WRITE 64 + static uint64_t fromhost_addr, tohost_addr; static int address_symbol_set; @@ -165,7 +168,19 @@ static void htif_handle_tohost_write(HTIFState *s, uint64_t val_written) int exit_code = payload >> 1; exit(exit_code); } else { - qemu_log_mask(LOG_UNIMP, "pk syscall proxy not supported\n"); + uint64_t syscall[8]; + cpu_physical_memory_read(payload, syscall, sizeof(syscall)); + if (syscall[0] == PK_SYS_WRITE && + syscall[1] == HTIF_DEV_CONSOLE && + syscall[3] == HTIF_CONSOLE_CMD_PUTC) { + uint8_t ch; + cpu_physical_memory_read(syscall[2], &ch, 1); + qemu_chr_fe_write(&s->chr, &ch, 1); + resp = 0x100 | (uint8_t)payload; + } else { + qemu_log_mask(LOG_UNIMP, + "pk syscall proxy not supported\n"); + } } } else { qemu_log("HTIF device %d: unknown command\n", device);