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[192.88.167.1]) by smtp.gmail.com with ESMTPSA id d186sm19351064pfa.45.2016.05.12.04.49.02 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 12 May 2016 04:49:04 -0700 (PDT) From: Peng Fan To: xen-devel@lists.xen.org, julien.grall@arm.com, sstabellini@kernel.org Date: Thu, 12 May 2016 19:48:47 +0800 Message-Id: <1463053728-3624-1-git-send-email-van.freenix@gmail.com> X-Mailer: git-send-email 2.6.2 Cc: van.freenix@gmail.com Subject: [Xen-devel] [PATCH V3 1/2] xen/arm: mm: remove unnecessary tlb flush in setup_pagetables X-BeenThere: xen-devel@lists.xen.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" X-Spam-Status: No, score=-4.1 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_MED, T_DKIM_INVALID, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP CPU0 is using the boot pages table before relocating xen and xen_second is not part of them. So, no need to flush the TLB when filling xen_second. Signed-off-by: Peng Fan Cc: Stefano Stabellini Cc: Julien Grall Reviewed-by: Julien Grall --- V3: Add Julien's review tag. V2: Following Julien's comments: split the V1 patch into two patches. This patch only remove tlb flush. refine commit log xen/arch/arm/mm.c | 1 - 1 file changed, 1 deletion(-) diff --git a/xen/arch/arm/mm.c b/xen/arch/arm/mm.c index 94ea054..addd699 100644 --- a/xen/arch/arm/mm.c +++ b/xen/arch/arm/mm.c @@ -447,7 +447,6 @@ void __init setup_pagetables(unsigned long boot_phys_offset, paddr_t xen_paddr) dest_va = BOOT_RELOC_VIRT_START; pte = mfn_to_xen_entry(xen_paddr >> PAGE_SHIFT, WRITEALLOC); write_pte(xen_second + second_table_offset(dest_va), pte); - flush_xen_data_tlb_range_va_local(dest_va, SECOND_SIZE); /* Calculate virt-to-phys offset for the new location */ phys_offset = xen_paddr - (unsigned long) _start;