From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:58431) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dXatC-000855-Fq for qemu-devel@nongnu.org; Tue, 18 Jul 2017 18:22:47 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dXatB-0004S1-Hf for qemu-devel@nongnu.org; Tue, 18 Jul 2017 18:22:46 -0400 Received: from mail.kernel.org ([198.145.29.99]:39804) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dXatB-0004Qd-CV for qemu-devel@nongnu.org; Tue, 18 Jul 2017 18:22:45 -0400 From: Stefano Stabellini Date: Tue, 18 Jul 2017 15:22:36 -0700 Message-Id: <1500416562-27337-1-git-send-email-sstabellini@kernel.org> In-Reply-To: References: Subject: [Qemu-devel] [PULL for-2.10 1/7] hw/xen: Set emu_mask for igd_opregion register List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: peter.maydell@linaro.org, stefanha@gmail.com Cc: sstabellini@kernel.org, stefanha@redhat.com, anthony.perard@citrix.com, xen-devel@lists.xenproject.org, qemu-devel@nongnu.org, Xiong Zhang From: Xiong Zhang In igd passthrough environment, guest could only access opregion at the first bootup time. Once guest shutdown, later guest couldn't access opregion anymore. This is because qemu set emulated guest opregion base address to host register. Later guest get a wrong host opregion base address, and couldn't access it anymore. This patch set emu_mask for igd_opregion register, so guest won't set guest opregion base address to host. Signed-off-by: Xiong Zhang Acked-by: Anthony PERARD Signed-off-by: Stefano Stabellini --- hw/xen/xen_pt_config_init.c | 1 + 1 file changed, 1 insertion(+) diff --git a/hw/xen/xen_pt_config_init.c b/hw/xen/xen_pt_config_init.c index 6f18366..1f04ec5 100644 --- a/hw/xen/xen_pt_config_init.c +++ b/hw/xen/xen_pt_config_init.c @@ -1535,6 +1535,7 @@ static XenPTRegInfo xen_pt_emu_reg_igd_opregion[] = { .offset = 0x0, .size = 4, .init_val = 0, + .emu_mask = 0xFFFFFFFF, .u.dw.read = xen_pt_intel_opregion_read, .u.dw.write = xen_pt_intel_opregion_write, }, -- 1.9.1