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([185.25.64.249]) by mx.google.com with ESMTPSA id fw6sm14830368wib.1.2015.01.19.08.29.53 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 19 Jan 2015 08:29:54 -0800 (PST) From: Julien Grall To: xen-devel@lists.xenproject.org Date: Mon, 19 Jan 2015 16:29:12 +0000 Message-Id: <1421684957-29884-6-git-send-email-julien.grall@linaro.org> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1421684957-29884-1-git-send-email-julien.grall@linaro.org> References: <1421684957-29884-1-git-send-email-julien.grall@linaro.org> Cc: stefano.stabellini@citrix.com, Julien Grall , tim@xen.org, ian.campbell@citrix.com Subject: [Xen-devel] [PATCH 05/10] xen/arm: vgic-v3: Document the current restrictions X-BeenThere: xen-devel@lists.xen.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: List-Unsubscribe: , List-Post: , List-Help: , List-Subscribe: , MIME-Version: 1.0 Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org X-Removed-Original-Auth: Dkim didn't pass. X-Original-Sender: julien.grall@linaro.org X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of patch+caf_=patchwork-forward=linaro.org@linaro.org designates 209.85.217.182 as permitted sender) smtp.mail=patch+caf_=patchwork-forward=linaro.org@linaro.org Mailing-list: list patchwork-forward@linaro.org; contact patchwork-forward+owners@linaro.org X-Google-Group-Id: 836684582541 List-Archive: The current vGIC v3 driver doesn't fully implement GICv3 spec: - GICv3 backward compatibility is not supported (GICD_CTLR.ARE = 0) - A processor can only access his own redistributor. For buggy assumption, the current code bank the redistributors MMIO. Signed-off-by: Julien Grall --- xen/arch/arm/vgic-v3.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/xen/arch/arm/vgic-v3.c b/xen/arch/arm/vgic-v3.c index 1fa1413..9818a6b 100644 --- a/xen/arch/arm/vgic-v3.c +++ b/xen/arch/arm/vgic-v3.c @@ -16,6 +16,11 @@ * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. + * + * Current limitation of the vGIC v3: + * - GICv2 backward compatibility is not supported (GICD_CTRL.ARE = 0) + * - A processor can only access his own redistributor. For buggy + * assumption, the current code bank the redistributors MMIO */ #include