linux-kernel - [patch 00/26] x64, x2apic/intr-remap: Interrupt-remapping and x2apic support

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]

Date:	Thu, 10 Jul 2008 11:16:34 -0700
From:	Suresh Siddha <suresh.b.siddha@...el.com>
To:	mingo@...e.hu, hpa@...or.com, tglx@...utronix.de,
	akpm@...ux-foundation.org, arjan@...ux.intel.com,
	andi@...stfloor.org, ebiederm@...ssion.com,
	jbarnes@...tuousgeek.org, steiner@....com
Cc:	linux-kernel@...r.kernel.org
Subject: [patch 00/26] x64, x2apic/intr-remap: Interrupt-remapping and x2apic support

x2APIC architecture provides a new x2apic mode, which allows for the
increased range of processor addressability ( > 8 bit apic ID support),
MSR access to APIC registers, etc. x2apic specification can be found at
http://download.intel.com/design/processor/specupdt/318148.pdf
(located under http://developer.intel.com/products/processor/manuals/index.htm )

Interrupt-remapping is part of Intel Virtualization Technology for
Directed I/O architecture and the specification can be found from
http://download.intel.com/technology/computing/vptech/Intel(r)_VT_for_Direct_IO.pdf
(above link seems to be broken for the moment, but in general it should be
found under http://www.intel.com/technology/virtualization/ )

Interrupt-remapping architecture enables extended Interrupt Mode on x86
platforms supporting 32-bit APIC-IDs. This infrastructure allows
the existing interrupt sources such as I/OxAPICs and MSI/MSI-X devices work
seamlessly with apic-id's > 8 bits. As such, this is a pre-requisite for
enabling x2apic mode in the CPU.

This patchset adds 64-bit support for interrupt-remapping and x2apic, which
introduces apic_ops for basic APIC ops(uncached memory Vs MSR accesses etc),
new irq_chip's for supporting interrupt-remapping and new genapic for
supporting IPI's, logical cluster/physical x2apic modes.

irq migration in the presence of interrupt-remapping is done from the
process-context as opposed to interrupt-context. Interrupt-remapping
infrastrucutre allows us to do this migration in a simple fashion (atleast for
edge triggered interrupts).

Interrupt-remapping (CONFIG_INTR_REMAP) and DMA-remapping (CONFIG_DMAR)
can be enabled separately.

More details in the individual patches that follow.

Signed-off-by: Suresh Siddha <suresh.b.siddha@...el.com>
-- 

--
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/