kernel.git/arch/x86/kernel/apic, branch linux-3.1.y

apic, i386/bigsmp: Fix false warnings regarding logical APIC ID mismatches

2011-11-11T17:43:11Z

commit 838312be46f3abfbdc175f81c3e54a857994476d upstream. These warnings (generally one per CPU) are a result of initializing x86_cpu_to_logical_apicid while apic_default is still in use, but the check in setup_local_APIC() being done when apic_bigsmp was already used as an override in default_setup_apic_routing(): Overriding APIC driver with bigsmp Enabling APIC mode: Physflat. Using 5 I/O APICs ------------[ cut here ]------------ WARNING: at .../arch/x86/kernel/apic/apic.c:1239 ... CPU 1 irqstacks, hard=f1c9a000 soft=f1c9c000 Booting Node 0, Processors #1 smpboot cpu 1: start_ip = 9e000 Initializing CPU#1 ------------[ cut here ]------------ WARNING: at .../arch/x86/kernel/apic/apic.c:1239 setup_local_APIC+0x137/0x46b() Hardware name: ... CPU1 logical APIC ID: 2 != 8 ... Fix this (for the time being, i.e. until x86_32_early_logical_apicid() will get removed again, as Tejun says ought to be possible) by overriding the previously stored values at the point where the APIC driver gets overridden. v2: Move this and the pre-existing override logic into arch/x86/kernel/apic/bigsmp_32.c. Signed-off-by: Jan Beulich Acked-by: Tejun Heo Link: http://lkml.kernel.org/r/4E835D16020000780005844C@nat28.tlf.novell.com Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman

x86: uv2: Workaround for UV2 Hub bug (system global address format)

2011-11-11T17:42:33Z

commit 6a469e4665bc158599de55d64388861d0a9f10f4 upstream. This is a workaround for a UV2 hub bug that affects the format of system global addresses. The GRU API for UV2 was inadvertently broken by a hardware change. The format of the physical address used for TLB dropins and for addresses used with instructions running in unmapped mode has changed. This change was not documented and became apparent only when diags failed running on system simulators. For UV1, TLB and GRU instruction physical addresses are identical to socket physical addresses (although high NASID bits must be OR'ed into the address). For UV2, socket physical addresses need to be converted. The NODE portion of the physical address needs to be shifted so that the low bit is in bit 39 or bit 40, depending on an MMR value. It is not yet clear if this bug will be fixed in a silicon respin. If it is fixed, the hub revision will be incremented & the workaround disabled. Signed-off-by: Jack Steiner Cc: Ingo Molnar Cc: "H. Peter Anvin" Signed-off-by: Andrew Morton Signed-off-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman

x86, UV: Remove UV delay in starting slave cpus

2011-08-05T21:48:34Z

Delete the 10 msec delay between the INIT and SIPI when starting slave cpus. I can find no requirement for this delay. BIOS also has similar code sequences without the delay. Removing the delay reduces boot time by 40 sec. Every bit helps. Signed-off-by: Jack Steiner Cc: Link: http://lkml.kernel.org/r/20110805140900.GA6774@sgi.com Signed-off-by: Ingo Molnar

atomic: use

2011-07-26T23:49:47Z

This allows us to move duplicated code in (atomic_inc_not_zero() for now) to Signed-off-by: Arun Sharma Reviewed-by: Eric Dumazet Cc: Ingo Molnar Cc: David Miller Cc: Eric Dumazet Acked-by: Mike Frysinger Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Merge branches 'x86-detect-hyper-for-linus', 'x86-fpu-for-linus', 'x86-kexec-for-linus', 'x86-platform-for-linus', 'x86-quirks-for-linus', 'x86-tsc-for-linus' and 'x86-smpboot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2011-07-23T17:38:21Z

* 'x86-detect-hyper-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, hyper: Change hypervisor detection order * 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86-32, fpu: Fix DNA exception during check_fpu() * 'x86-kexec-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: kexec, x86: Fix incorrect jump back address if not preserving context * 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, config: Introduce an INTEL_MID configuration * 'x86-quirks-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, quirks: Use pci_dev->revision * 'x86-tsc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: tsc: Remove unneeded DMI-based blacklisting * 'x86-smpboot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, boot: Wait for boot cpu to show up if nr_cpus limit is about to hit

Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2011-07-23T00:02:07Z

* 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, ioapic: Print IR_IO_APIC_route_entry when IR is enabled x86, ioapic: Print IRTE when IR is enabled x86, x2apic: Preserve high 32-bits of IA32_APIC_BASE MSR x86, ioapic: Also print Dest field x86, ioapic: Format clean up for IOAPIC output x86: print APIC data a little later during boot

Merge branch 'timers-cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2011-07-22T23:51:56Z

* 'timers-cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: mips: Fix i8253 clockevent fallout i8253: Cleanup outb/inb magic arm: Footbridge: Use common i8253 clockevent mips: Use common i8253 clockevent x86: Use common i8253 clockevent i8253: Create common clockevent implementation i8253: Export i8253_lock unconditionally pcpskr: MIPS: Make config dependencies finer grained pcspkr: Cleanup Kconfig dependencies i8253: Move remaining content and delete asm/i8253.h i8253: Consolidate definitions of PIT_LATCH x86: i8253: Consolidate definitions of global_clock_event i8253: Alpha, PowerPC: Remove unused asm/8253pit.h alpha: i8253: Cleanup remaining users of i8253pit.h i8253: Remove I8253_LOCK config i8253: Make pcsp sound driver use the shared i8253_lock i8253: Make pcspkr input driver use the shared i8253_lock i8253: Consolidate all kernel definitions of i8253_lock i8253: Unify all kernel declarations of i8253_lock i8253: Create linux/i8253.h and use it in all 8253 related files

x86, ioapic: Print IR_IO_APIC_route_entry when IR is enabled

2011-07-13T03:17:58Z

When IR (interrupt remapping) is enabled print_IO_APIC() displays output according to legacy RTE (redirection table entry) definitons: NR Dst Mask Trig IRR Pol Stat Dmod Deli Vect: 00 00 1 0 0 0 0 0 0 00 01 00 0 0 0 0 0 0 0 01 02 00 0 0 0 0 0 0 0 02 03 00 1 0 0 0 0 0 0 03 04 00 1 0 0 0 0 0 0 04 05 00 1 0 0 0 0 0 0 05 06 00 1 0 0 0 0 0 0 06 ... The above output is as per Sec 3.2.4 of the IOAPIC datasheet: 82093AA I/O Advanced Programmable Interrupt Controller (IOAPIC): http://download.intel.com/design/chipsets/datashts/29056601.pdf Instead the output should display the fields as discussed in Sec 5.5.1 of the VT-d specification: (Intel Virtualization Technology for Directed I/O: http://download.intel.com/technology/computing/vptech/Intel(r)_VT_for_Direct_IO.pdf) After the fix: NR Indx Fmt Mask Trig IRR Pol Stat Indx2 Zero Vect: 00 0000 0 1 0 0 0 0 0 0 00 01 000F 1 0 0 0 0 0 0 0 01 02 0001 1 0 0 0 0 0 0 0 02 03 0002 1 1 0 0 0 0 0 0 03 04 0011 1 1 0 0 0 0 0 0 04 05 0004 1 1 0 0 0 0 0 0 05 06 0005 1 1 0 0 0 0 0 0 06 ... Signed-off-by: Naga Chumbalkar Link: http://lkml.kernel.org/r/20110712211658.2939.93123.sendpatchset@nchumbalkar.americas.cpqcorp.net Signed-off-by: H. Peter Anvin

x86, ioapic: Print IRTE when IR is enabled

2011-07-12T21:34:00Z

When "apic=debug" is used as a boot parameter, Linux prints the IOAPIC routing entries in "dmesg". Below is output from IOAPIC whose apic_id is 8: # dmesg | grep "routing entry" IOAPIC[8]: Set routing entry (8-1 -> 0x31 -> IRQ 1 Mode:0 Active:0 Dest:0) IOAPIC[8]: Set routing entry (8-2 -> 0x30 -> IRQ 0 Mode:0 Active:0 Dest:0) IOAPIC[8]: Set routing entry (8-3 -> 0x33 -> IRQ 3 Mode:0 Active:0 Dest:0) ... Similarly, when IR (interrupt remapping) is enabled, and the IRTE (interrupt remapping table entry) is set up we should display it. After the fix: # dmesg | grep IRTE IOAPIC[8]: Set IRTE entry (P:1 FPD:0 Dst_Mode:0 Redir_hint:1 Trig_Mode:0 Dlvry_Mode:0 Avail:0 Vector:31 Dest:00000000 SID:00F1 SQ:0 SVT:1) IOAPIC[8]: Set IRTE entry (P:1 FPD:0 Dst_Mode:0 Redir_hint:1 Trig_Mode:0 Dlvry_Mode:0 Avail:0 Vector:30 Dest:00000000 SID:00F1 SQ:0 SVT:1) IOAPIC[8]: Set IRTE entry (P:1 FPD:0 Dst_Mode:0 Redir_hint:1 Trig_Mode:0 Dlvry_Mode:0 Avail:0 Vector:33 Dest:00000000 SID:00F1 SQ:0 SVT:1) ... The IRTE is defined in Sec 9.5 of the Intel VT-d Specification. Signed-off-by: Naga Chumbalkar Link: http://lkml.kernel.org/r/20110712211704.2939.71291.sendpatchset@nchumbalkar.americas.cpqcorp.net Signed-off-by: H. Peter Anvin

x86, x2apic: Preserve high 32-bits of IA32_APIC_BASE MSR

2011-07-12T21:33:49Z

If there's no special reason to zero-out the "high" 32-bits of the IA32_APIC_BASE MSR, let's preserve it. The x2APIC Specification doesn't explicitly state any such requirement. (Sec 2.2 in: http://www.intel.com/Assets/PDF/manual/318148.pdf). Signed-off-by: Naga Chumbalkar Link: http://lkml.kernel.org/r/20110712055831.2498.78521.sendpatchset@nchumbalkar.americas.cpqcorp.net Reviewed-by: Cyrill Gorcunov Reviewed-by: Suresh Siddha Signed-off-by: H. Peter Anvin