linux-kernel - [RFC v3 03/10] iommu: Add new reserved IOMMU attributes

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: <1479215363-2898-4-git-send-email-eric.auger@redhat.com>
Date:   Tue, 15 Nov 2016 13:09:16 +0000
From:   Eric Auger <eric.auger@...hat.com>
To:     eric.auger@...hat.com, eric.auger.pro@...il.com,
        christoffer.dall@...aro.org, marc.zyngier@....com,
        robin.murphy@....com, alex.williamson@...hat.com,
        will.deacon@....com, joro@...tes.org, tglx@...utronix.de,
        jason@...edaemon.net, linux-arm-kernel@...ts.infradead.org
Cc:     kvm@...r.kernel.org, drjones@...hat.com,
        linux-kernel@...r.kernel.org, pranav.sawargaonkar@...il.com,
        iommu@...ts.linux-foundation.org, punit.agrawal@....com,
        diana.craciun@....com
Subject: [RFC v3 03/10] iommu: Add new reserved IOMMU attributes

IOMMU_RESV_NOMAP is used to tag reserved IOVAs that are not
supposed to be IOMMU mapped. IOMMU_RESV_MSI tags IOVAs
corresponding to MSIs that need to be IOMMU mapped.

IOMMU_RESV_MASK allows to check if the IOVA is reserved.

Signed-off-by: Eric Auger <eric.auger@...hat.com>
---
 include/linux/iommu.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 7f6ebd0..02cf565 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -32,6 +32,10 @@
 #define IOMMU_NOEXEC	(1 << 3)
 #define IOMMU_MMIO	(1 << 4) /* e.g. things like MSI doorbells */
 
+#define IOMMU_RESV_MASK		0x300 /* Reserved IOVA mask */
+#define IOMMU_RESV_NOMAP	(1 << 8) /* IOVA that cannot be mapped */
+#define IOMMU_RESV_MSI		(1 << 9) /* MSI region transparently mapped */
+
 struct iommu_ops;
 struct iommu_group;
 struct bus_type;
-- 
1.9.1