Dimitri Sivanich 8191c9f692 x86: UV: Address interrupt/IO port operation conflict ... This patch for SGI UV systems addresses a problem whereby interrupt transactions being looped back from a local IOH, through the hub to a local CPU can (erroneously) conflict with IO port operations and other transactions. To workaound this we set a high bit in the APIC IDs used for interrupts. This bit appears to be ignored by the sockets, but it avoids the conflict in the hub. Signed-off-by: Dimitri Sivanich <sivanich@sgi.com> LKML-Reference: <20101116222352.GA8155@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> ___ arch/x86/include/asm/uv/uv_hub.h | 4 ++++ arch/x86/include/asm/uv/uv_mmrs.h | 19 ++++++++++++++++++- arch/x86/kernel/apic/x2apic_uv_x.c | 25 +++++++++++++++++++++++-- arch/x86/platform/uv/tlb_uv.c | 2 +- arch/x86/platform/uv/uv_time.c | 4 +++- 5 files changed, 49 insertions(+), 5 deletions(-)		2010-11-18 10:41:25 +01:00
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bios.h	Merge branch 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-02-28 11:00:55 -08:00
uv_bau.h	x86, UV: Modularize BAU send and wait	2010-06-08 21:13:48 +02:00
uv_hub.h	x86: UV: Address interrupt/IO port operation conflict	2010-11-18 10:41:25 +01:00
uv_irq.h	x86, apic: Move SGI UV functionality out of generic IO-APIC code	2009-10-14 09:17:09 +02:00
uv_mmrs.h	x86: UV: Address interrupt/IO port operation conflict	2010-11-18 10:41:25 +01:00
uv.h	x86: Enable NMI on all cpus on UV	2010-02-27 12:34:21 +01:00