linux-kernel - [RFC PATCH v2 01/14] x86/msi: Add definition for NMI delivery mode

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: <1551283518-18922-2-git-send-email-ricardo.neri-calderon@linux.intel.com>
Date:   Wed, 27 Feb 2019 08:05:05 -0800
From:   Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...nel.org>, Borislav Petkov <bp@...e.de>
Cc:     Ashok Raj <ashok.raj@...el.com>, Andi Kleen <andi.kleen@...el.com>,
        Peter Zijlstra <peterz@...radead.org>,
        "Ravi V. Shankar" <ravi.v.shankar@...el.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org,
        Ricardo Neri <ricardo.neri@...el.com>,
        Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>, Tony Luck <tony.luck@...el.com>,
        Joerg Roedel <joro@...tes.org>,
        Juergen Gross <jgross@...e.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Wincy Van <fanwenyi0529@...il.com>,
        Kate Stewart <kstewart@...uxfoundation.org>,
        Philippe Ombredanne <pombredanne@...b.com>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Baoquan He <bhe@...hat.com>,
        Dou Liyang <douly.fnst@...fujitsu.com>,
        Jan Kiszka <jan.kiszka@...mens.com>
Subject: [RFC PATCH v2 01/14] x86/msi: Add definition for NMI delivery mode

Until now, the delivery mode of MSI interrupts is set to the default
mode set in the APIC driver. However, there are no restrictions in hardware
to configure each interrupt with a different delivery mode. Specifying the
delivery mode per interrupt is useful when one is interested in changing
the delivery mode of a particular interrupt. For instance, this can be used
to deliver an interrupt as non-maskable.

Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: Ashok Raj <ashok.raj@...el.com>
Cc: Andi Kleen <andi.kleen@...el.com>
Cc: Tony Luck <tony.luck@...el.com>
Cc: Joerg Roedel <joro@...tes.org>
Cc: Juergen Gross <jgross@...e.com>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: Wincy Van <fanwenyi0529@...il.com>
Cc: Kate Stewart <kstewart@...uxfoundation.org>
Cc: Philippe Ombredanne <pombredanne@...b.com>
Cc: "Eric W. Biederman" <ebiederm@...ssion.com>
Cc: Baoquan He <bhe@...hat.com>
Cc: Dou Liyang <douly.fnst@...fujitsu.com>
Cc: Jan Kiszka <jan.kiszka@...mens.com>
Cc: "Ravi V. Shankar" <ravi.v.shankar@...el.com>
Cc: x86@...nel.org
Signed-off-by: Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
---
 arch/x86/include/asm/msidef.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/include/asm/msidef.h b/arch/x86/include/asm/msidef.h
index ee2f8ccc32d0..38ccfdc2d96e 100644
--- a/arch/x86/include/asm/msidef.h
+++ b/arch/x86/include/asm/msidef.h
@@ -18,6 +18,7 @@
 #define MSI_DATA_DELIVERY_MODE_SHIFT	8
 #define  MSI_DATA_DELIVERY_FIXED	(0 << MSI_DATA_DELIVERY_MODE_SHIFT)
 #define  MSI_DATA_DELIVERY_LOWPRI	(1 << MSI_DATA_DELIVERY_MODE_SHIFT)
+#define  MSI_DATA_DELIVERY_NMI		(4 << MSI_DATA_DELIVERY_MODE_SHIFT)
 
 #define MSI_DATA_LEVEL_SHIFT		14
 #define	 MSI_DATA_LEVEL_DEASSERT	(0 << MSI_DATA_LEVEL_SHIFT)
-- 
2.17.1