lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-ID: <20090907145807.GA30942@youquan-linux.bj.intel.com>
Date:	Mon, 7 Sep 2009 10:58:07 -0400
From:	Youquan Song <youquan.song@...el.com>
To:	mingo@...e.hu, hpa@...or.com, tglx@...utronix.de
Cc:	linux-kernel@...r.kernel.org, dwmw2@...radead.org,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	youquan.song@...el.com
Subject: [PATCH] interrupt remapping: Disallow interrupt remapping if not all ioapic under interrupt remapping

Current kernel enable interrupt remapping only when all the vt-d unit support
interrupt remapping. So it is reasonable we should also disallow enabling
intr-remapping if there any io-apics that are not listed under vt-d units. 
Otherwise we can run into issues.

Acked-by: Suresh Siddha <suresh.b.siddha@...el.com> 
Signed-off-by: Youquan Song <youquan.song@...el.com>
---

diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c
index 7b287cb..a8a4383 100644
--- a/drivers/pci/dmar.c
+++ b/drivers/pci/dmar.c
@@ -570,9 +570,6 @@ int __init dmar_table_init(void)
 		printk(KERN_INFO PREFIX "No ATSR found\n");
 #endif
 
-#ifdef CONFIG_INTR_REMAP
-	parse_ioapics_under_ir();
-#endif
 	return 0;
 }
 
diff --git a/drivers/pci/intr_remapping.c b/drivers/pci/intr_remapping.c
index 4f5b871..ebfa47b 100644
--- a/drivers/pci/intr_remapping.c
+++ b/drivers/pci/intr_remapping.c
@@ -626,6 +626,11 @@ int __init enable_intr_remapping(int eim)
 	struct dmar_drhd_unit *drhd;
 	int setup = 0;
 
+	if (parse_ioapics_under_ir() != 1) {
+		printk(KERN_INFO "Not enable interrupt remapping\n");
+		return -1;
+	}
+
 	for_each_drhd_unit(drhd) {
 		struct intel_iommu *iommu = drhd->iommu;
 
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ