From patchwork Fri Jul 10 06:30:18 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiaxun Yang X-Patchwork-Id: 11655801 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7BC8513BD for ; Fri, 10 Jul 2020 06:34:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6303A2078B for ; Fri, 10 Jul 2020 06:34:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=flygoat.com header.i=@flygoat.com header.b="Hx7glFFa" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727873AbgGJGd7 (ORCPT ); Fri, 10 Jul 2020 02:33:59 -0400 Received: from vultr.net.flygoat.com ([149.28.68.211]:40678 "EHLO vultr.net.flygoat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726047AbgGJGd7 (ORCPT ); Fri, 10 Jul 2020 02:33:59 -0400 Received: from localhost.localdomain (unknown [IPv6:2001:da8:20f:4430:250:56ff:fe9a:7470]) by vultr.net.flygoat.com (Postfix) with ESMTPSA id EED5E1FF18; Fri, 10 Jul 2020 06:33:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=flygoat.com; s=vultr; t=1594362838; bh=k4tTRKe0YcW9MuCAbiRePPA3r0/yfJjA+o3AHhYVve0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Hx7glFFaP226ppsZTavLI+KYfcucuncxjrYH3DHF6fg+JZspH/AV0K4mDoLoCjyii pX89roUu8CB8UCCSo1Rs37Xf6qbIHfodqpNoUkGM5tRKoOUUi/mX/ZjRO/yn7mTPaE zP/FY3rqQ5qREF31tnubfVBnD32BvOWBecQkYytS5wQLrqBQgPkPOSDrQ+2O+2toyI /h6S/l9a/PQCTk5g6htWa5h/h+n2di1BG4VsvZf7OCIgI7l8iScduZ2ESr61OyFsso 21/QFSwehpOrkBxXlARXmtNzTRaJmAWYizJhrMqQQyhc2ghKSMXYcP3hcACvnzjIEz YMKwj/+L0D1Vw== From: Jiaxun Yang To: linux-mips@vger.kernel.org Cc: Jiaxun Yang , Thomas Bogendoerfer , Masahiro Yamada , Michal Simek , Paul Walmsley , Bjorn Helgaas , Paul Burton , Alexander Lobakin , Aleksandar Markovic , Huacai Chen , Jason Wang , "Michael S. Tsirkin" , linux-kernel@vger.kernel.org, kvm@vger.kernel.org Subject: [RFC PATCH 3/3] MIPS: KVM: Remove outdated README Date: Fri, 10 Jul 2020 14:30:18 +0800 Message-Id: <20200710063047.154611-4-jiaxun.yang@flygoat.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200710063047.154611-1-jiaxun.yang@flygoat.com> References: <20200710063047.154611-1-jiaxun.yang@flygoat.com> MIME-Version: 1.0 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org This file was created long ago and information inside is obviously outdated. Signed-off-by: Jiaxun Yang --- arch/mips/kvm/00README.txt | 31 ------------------------------- 1 file changed, 31 deletions(-) delete mode 100644 arch/mips/kvm/00README.txt diff --git a/arch/mips/kvm/00README.txt b/arch/mips/kvm/00README.txt deleted file mode 100644 index 51617e481aa3..000000000000 --- a/arch/mips/kvm/00README.txt +++ /dev/null @@ -1,31 +0,0 @@ -KVM/MIPS Trap & Emulate Release Notes -===================================== - -(1) KVM/MIPS should support MIPS32R2 and beyond. It has been tested on the following platforms: - Malta Board with FPGA based 34K - Sigma Designs TangoX board with a 24K based 8654 SoC. - Malta Board with 74K @ 1GHz - -(2) Both Guest kernel and Guest Userspace execute in UM. - Guest User address space: 0x00000000 -> 0x40000000 - Guest Kernel Unmapped: 0x40000000 -> 0x60000000 - Guest Kernel Mapped: 0x60000000 -> 0x80000000 - - Guest Usermode virtual memory is limited to 1GB. - -(2) 16K Page Sizes: Both Host Kernel and Guest Kernel should have the same page size, currently at least 16K. - Note that due to cache aliasing issues, 4K page sizes are NOT supported. - -(3) No HugeTLB Support - Both the host kernel and Guest kernel should have the page size set to 16K. - This will be implemented in a future release. - -(4) KVM/MIPS does not have support for SMP Guests - Linux-3.7-rc2 based SMP guest hangs due to the following code sequence in the generated TLB handlers: - LL/TLBP/SC. Since the TLBP instruction causes a trap the reservation gets cleared - when we ERET back to the guest. This causes the guest to hang in an infinite loop. - This will be fixed in a future release. - -(5) Use Host FPU - Currently KVM/MIPS emulates a 24K CPU without a FPU. - This will be fixed in a future release