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Signed-off-by: Oleksii Kurochko Acked-by: Andrew Cooper Acked-by: Bobby Eshleman Reviewed-by: Bobby Eshleman --- xen/arch/riscv/riscv64/head.S | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/xen/arch/riscv/riscv64/head.S b/xen/arch/riscv/riscv64/head.S index ffd95f9f89..52fa41c778 100644 --- a/xen/arch/riscv/riscv64/head.S +++ b/xen/arch/riscv/riscv64/head.S @@ -6,6 +6,13 @@ ENTRY(start) /* Mask all interrupts */ csrw CSR_SIE, zero + /* + * Disable FPU to detect illegal usage of + * floating point in kernel space + */ + li t0, SSTATUS_FS + csrc CSR_SSTATUS, t0 + la sp, cpu0_boot_stack li t0, STACK_SIZE add sp, sp, t0 From patchwork Fri Mar 3 10:24:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Oleksii Kurochko X-Patchwork-Id: 13158628 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.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 68621C7EE30 for ; Fri, 3 Mar 2023 10:24:39 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.505762.778701 (Exim 4.92) (envelope-from ) id 1pY2aX-0000QF-RS; Fri, 03 Mar 2023 10:24:33 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 505762.778701; Fri, 03 Mar 2023 10:24:33 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1pY2aX-0000Py-Nb; Fri, 03 Mar 2023 10:24:33 +0000 Received: by outflank-mailman (input) for mailman id 505762; Fri, 03 Mar 2023 10:24:33 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1pY2aX-0000IE-8F for xen-devel@lists.xenproject.org; Fri, 03 Mar 2023 10:24:33 +0000 Received: from mail-lj1-x229.google.com (mail-lj1-x229.google.com [2a00:1450:4864:20::229]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id 95de3337-b9ad-11ed-a550-8520e6686977; Fri, 03 Mar 2023 11:24:31 +0100 (CET) Received: by mail-lj1-x229.google.com with SMTP id b13so1815322ljf.6 for ; Fri, 03 Mar 2023 02:24:31 -0800 (PST) Received: from fedora.. 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-void __init noreturn start_xen(void) +void __init noreturn start_xen(unsigned long bootcpu_id, + unsigned long dtb_base) { early_printk("Hello from C env\n"); From patchwork Fri Mar 3 10:24:24 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Oleksii Kurochko X-Patchwork-Id: 13158629 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.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 8B328C678D4 for ; Fri, 3 Mar 2023 10:24:40 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.505763.778711 (Exim 4.92) (envelope-from ) id 1pY2aZ-0000h5-3b; Fri, 03 Mar 2023 10:24:35 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 505763.778711; 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It will simplify code of + * .bss initialization. + * TODO: + * To be deleted when the first real .bss user appears + */ +int dummy_bss __attribute__((unused)); + void __init noreturn start_xen(unsigned long bootcpu_id, unsigned long dtb_base) {