linux-kernel - [PATCH v8 13/13] iommu/vt-d: Add a command line parameter for VT-d posted-interrupts

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-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1442393409-2623-14-git-send-email-feng.wu@intel.com>
Date:	Wed, 16 Sep 2015 16:50:09 +0800
From:	Feng Wu <feng.wu@...el.com>
To:	pbonzini@...hat.com, alex.williamson@...hat.com, joro@...tes.org,
	mtosatti@...hat.com
Cc:	eric.auger@...aro.org, kvm@...r.kernel.org,
	iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	Feng Wu <feng.wu@...el.com>
Subject: [PATCH v8 13/13] iommu/vt-d: Add a command line parameter for VT-d posted-interrupts

Enable VT-d Posted-Interrtups and add a command line
parameter for it.

Signed-off-by: Feng Wu <feng.wu@...el.com>
Reviewed-by: Paolo Bonzini <pbonzini@...hat.com>
---
 Documentation/kernel-parameters.txt |  1 +
 drivers/iommu/irq_remapping.c       | 12 ++++++++----
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 1d6f045..52aca36 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1547,6 +1547,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 			nosid	disable Source ID checking
 			no_x2apic_optout
 				BIOS x2APIC opt-out request will be ignored
+			nopost	disable Interrupt Posting
 
 	iomem=		Disable strict checking of access to MMIO memory
 		strict	regions from userspace.
diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c
index 2d99930..d8c3997 100644
--- a/drivers/iommu/irq_remapping.c
+++ b/drivers/iommu/irq_remapping.c
@@ -22,7 +22,7 @@ int irq_remap_broken;
 int disable_sourceid_checking;
 int no_x2apic_optout;
 
-int disable_irq_post = 1;
+int disable_irq_post = 0;
 
 static int disable_irq_remap;
 static struct irq_remap_ops *remap_ops;
@@ -58,14 +58,18 @@ static __init int setup_irqremap(char *str)
 		return -EINVAL;
 
 	while (*str) {
-		if (!strncmp(str, "on", 2))
+		if (!strncmp(str, "on", 2)) {
 			disable_irq_remap = 0;
-		else if (!strncmp(str, "off", 3))
+			disable_irq_post = 0;
+		} else if (!strncmp(str, "off", 3)) {
 			disable_irq_remap = 1;
-		else if (!strncmp(str, "nosid", 5))
+			disable_irq_post = 1;
+		} else if (!strncmp(str, "nosid", 5))
 			disable_sourceid_checking = 1;
 		else if (!strncmp(str, "no_x2apic_optout", 16))
 			no_x2apic_optout = 1;
+		else if (!strncmp(str, "nopost", 6))
+			disable_irq_post = 1;
 
 		str += strcspn(str, ",");
 		while (*str == ',')
-- 
2.1.0

--
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/