Message ID | 20240305170858.395836-23-andrew.jones@linux.dev |
---|---|
State | Handled Elsewhere |
Headers | show
Return-Path: <kvm-riscv-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org> X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; dkim=pass (2048-bit key; secure) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=1lDQW76S; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=vvmIDvs5; dkim-atps=neutral Authentication-Results: legolas.ozlabs.org; spf=none (no SPF record) smtp.mailfrom=lists.infradead.org (client-ip=2607:7c80:54:3::133; helo=bombadil.infradead.org; envelope-from=kvm-riscv-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org; receiver=patchwork.ozlabs.org) Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (secp384r1) server-digest SHA384) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4Tq29Q4QKKz23cb for <incoming@patchwork.ozlabs.org>; Wed, 6 Mar 2024 04:09:30 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=AagBAf+fyMrjxWkDNz0ur1IXnQyV91fsqW4LeLnNLto=; b=1lDQW76SKbXB03 FZ9StBuy9cTjb8s4q12EtdHOyjNLFvWk/+8Vbzw0K0uyck57D0WtqDz/RqJe/6knNGmceT+0FJBmK R484QaSLPfqprmtC2iUQkVTiaFyDJtM58Opd2vclwP0CbQj95eLHS0rdpl40+RPoB2BI2lJMWnvrS 4FowaAwG5xnWZKoB4zhbMcebl8VgkaPpECNXekVd5hU1KJAEjVucmH+gjrKiBc3hmkkNPBMBOyeSz R1vaL4lgrolH1nethce+EDiTR+wteuUgflPkaP5xxm1RXFA1EOrkFpYpEQ13RBHemH/JFsX5660eG jpN7xsE2bKbEcTOo8gcw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rhYID-0000000EcqX-0dCv; Tue, 05 Mar 2024 17:09:29 +0000 Received: from out-182.mta1.migadu.com ([2001:41d0:203:375::b6]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rhYI9-0000000Ecm8-3Nc5 for kvm-riscv@lists.infradead.org; Tue, 05 Mar 2024 17:09:27 +0000 X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1709658562; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=60erSBumokDdrzjlqC5ZP+QvOuHbufETq/jMNeBQ/NY=; b=vvmIDvs5rFqIDCkmOpDKsPS++4vCt8uFCkUHvpqB05TY9EB367Pt4zX1Urxc0+tG+mEQSg RmqrgrjkmqqC4zJ6dRx7nurOUkEbwpKYI/c7tiMDeYpEJtxvdNoETNTT7pJfJgshEKcAAi 5VxHMmPuanhBEWquUwRos3ZT1RYrFKc= From: Andrew Jones <andrew.jones@linux.dev> To: kvm@vger.kernel.org, kvm-riscv@lists.infradead.org Cc: pbonzini@redhat.com, thuth@redhat.com Subject: [kvm-unit-tests PATCH v2 08/13] riscv: efi: Switch stack in _start Date: Tue, 5 Mar 2024 18:09:07 +0100 Message-ID: <20240305170858.395836-23-andrew.jones@linux.dev> In-Reply-To: <20240305170858.395836-15-andrew.jones@linux.dev> References: <20240305170858.395836-15-andrew.jones@linux.dev> MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240305_090926_129515_B0D75E19 X-CRM114-Status: UNSURE ( 7.04 ) X-CRM114-Notice: Please train this message. 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diff --git a/riscv/efi/crt0-efi-riscv64.S b/riscv/efi/crt0-efi-riscv64.S index cc8551a43c6a..4ed82b14a1d6 100644 --- a/riscv/efi/crt0-efi-riscv64.S +++ b/riscv/efi/crt0-efi-riscv64.S @@ -164,7 +164,20 @@ _start: bne a0, zero, 0f ld a1, 8(sp) ld a0, 0(sp) + + /* Switch to our own stack */ + mv a2, sp + la sp, stacktop + mv fp, zero + push_fp zero + addi sp, sp, -16 + sd a2, 0(sp) + call efi_main + + /* Restore sp */ + ld sp, 0(sp) + ld ra, 16(sp) 0: addi sp, sp, 24 ret @@ -172,6 +185,11 @@ _start: // hand-craft a dummy .reloc section so EFI knows it's a relocatable executable: .data + +.balign 16384 +.space 16384 +stacktop: + dummy: .4byte 0 #define IMAGE_REL_ABSOLUTE 0
Modify gnu-efi's _start to switch the stack. This allows us to not map memory regions which have EFI memory type EFI_BOOT_SERVICES_DATA, as the stack will be in the EFI_LOADER_CODE region instead. We'll still map the stack as R/W instead of R/X because we'll split the EFI_LOADER_CODE region on the _etext boundary and map addresses before _etext as R/X and the rest as R/W. Signed-off-by: Andrew Jones <andrew.jones@linux.dev> --- riscv/efi/crt0-efi-riscv64.S | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)