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Tsirkin" , linux-kernel@vger.kernel.org, kvm@vger.kernel.org Subject: [RFC PATCH 3/3] MIPS: KVM: Remove outdated README Date: Fri, 10 Jul 2020 14:30:18 +0800 Message-Id: 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 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This file was created long ago and information inside is obviously outdated.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 -- 2.27.0