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* x86: support for new UV apicJack Steiner2008-04-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | UV supports really big systems. So big, in fact, that the APICID register does not contain enough bits to contain an APICID that is unique across all cpus. The UV BIOS supports 3 APICID modes: - legacy mode. This mode uses the old APIC mode where APICID is in bits [31:24] of the APICID register. - x2apic mode. This mode is whitebox-compatible. APICIDs are unique across all cpus. Standard x2apic APIC operations (Intel-defined) can be used for IPIs. The node identifier fits within the Intel-defined portion of the APICID register. - x2apic-uv mode. In this mode, the APICIDs on each node have unique IDs, but IDs on different node are not unique. For example, if each mode has 32 cpus, the APICIDs on each node might be 0 - 31. Every node has the same set of IDs. The UV hub is used to route IPIs/interrupts to the correct node. Traditional APIC operations WILL NOT WORK. In x2apic-uv mode, the ACPI tables all contain a full unique ID (note: exact bit layout still changing but the following is close): nnnnnnnnnnlc0cch n = unique node number l = socket number on board c = core h = hyperthread Only the "lc0cch" bits are written to the APICID register. The remaining bits are supplied by having the get_apic_id() function "OR" the extra bits into the value read from the APICID register. (Hmmm.. why not keep the ENTIRE APICID register in per-cpu data....) The x2apic-uv mode is recognized by the MADT table containing: oem_id = "SGI" oem_table_id = "UV-X" Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: define the macros and tables for blade functionsJack Steiner2008-04-17
| | | | | | | | | Add UV macros for converting between cpu numbers, blade numbers and node numbers. Note that these are used ONLY within x86_64 UV modules, and are not for general kernel use. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: define the macros and tables for the basic UV infrastructure.Jack Steiner2008-04-17
| | | | | | | Define the macros and tables for the basic UV infrastructure. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: add UV specific header for MMR definitionsJack Steiner2008-04-17
| | | | | | | | Definitions of UV MMRs. Note: this file is auto-generated by hardware design tools. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: increase size of APICIDJack Steiner2008-04-17
| | | | | | | | | | | | | Increase the number of bits in an apicid from 8 to 32. By default, MP_processor_info() gets the APICID from the mpc_config_processor structure. However, this structure limits the size of APICID to 8 bits. This patch allows the caller of MP_processor_info() to optionally pass a larger APICID that will be used instead of the one in the mpc_config_processor struct. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: add functions to determine if platform is a UV platformJack Steiner2008-04-17
| | | | | | | | | Add functions that can be used to determine if an x86_64 system is a SGI "UV" system. UV systems come in 3 types and are identified by the OEM ID in the MADT. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: change GET_APIC_ID() from an inline function to an out-of-line functionJack Steiner2008-04-17
| | | | | | | | | | Introduce a function to read the local APIC_ID. This change is in preparation for additional changes to the APICID functions that will come in a later patch. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: replace most VM86 flags with flags from processor-flags.hgorcunov@gmail.com2008-04-17
| | | | | Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: cleanup - rename VM_MASK to X86_VM_MASKgorcunov@gmail.com2008-04-17
| | | | | | | | | | | This patch renames VM_MASK to X86_VM_MASK (which in turn defined as alias to X86_EFLAGS_VM) to better distinguish from virtual memory flags. We can't just use X86_EFLAGS_VM instead because it is also used for conditional compilation Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: cleanup replace most vm86 flags with flags from processor-flags.h, fixIngo Molnar2008-04-17
| | | | | | | - fix build error - fix CONFIG_HEADERS_CHECK error Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: sparsemem: reduce i386 PAE section sizeJeremy Fitzhardinge2008-04-17
| | | | | | | | | | | | | A 1G section size makes memory hotplug too coarse in a virtual environment. Retuce it by a factor of 2 to 512M. I would have liked to make it smaller, but it runs out of reserved flags in the page flags. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Yasunori Goto <y-goto@jp.fujitsu.com> Cc: Christoph Lameter <clameter@sgi.com> Cc: Dave Hansen <dave@linux.vnet.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: merge smp_32.h and smp_64.h into smp.hGlauber Costa2008-04-17
| | | | | | | | Merge what's left from smp_32.h and smp_64.h into smp.h By now, they're basically extern definitions. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: merge SMP definitions of smp.hGlauber Costa2008-04-17
| | | | | | | | | we merge everything that is inside CONFIG_SMP to smp.h. They differ a little bit, so we use CONFIG_X86_32_SMP and CONFIG_X86_64_SMP as markers. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: split safe_smp_processor_idGlauber Costa2008-04-17
| | | | | | | | | This implementation in x86_64 is clean and consistent, but we sacrifice it for the sake of being equal to i386 (since the other way around would be harder). Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: merge includes in smp.hGlauber Costa2008-04-17
| | | | | | | move all include directives from smp_{32,64}.h to smp.h. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: surround apic headers in apic definitionsGlauber Costa2008-04-17
| | | | | | | | | | Although those constants are always defined in x86_64, and will have the effect of just including the headers in the very way we did before, I'm doing this in a separate patch to be conservative and avoid surprises. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: merge hard/logical_smp_processor_idGlauber Costa2008-04-17
| | | | | | | | | | The code is now the same between i386 and x86_64. We already know what happens when it reaches this point: They go away from the arch-specific headers, and suddenly appears in the common header. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: provide bogus hard_smp_processor_idGlauber Costa2008-04-17
| | | | | | | | | We provide a bogus macro for x86_64 in case CONFIG_X86_LOCAL_APIC is not set. It will always be set for x86_64, so the effect is just to make the code equal to i386. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: surround hard_smp_processor_id in APIC_DEFINITIONGlauber Costa2008-04-17
| | | | | | | | | APIC_DEFINITION is not defined in x86_64, so in practice, we keep our old code here. But as a nice side effect, the code is now equal to smp_32.h. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: mpparse, move generic processor info to apic_32.c fixIngo Molnar2008-04-17
| | | | Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: move generic_processor_info to apic_32.cAlexey Starikovskiy2008-04-17
| | | | | Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: add comments to describe the new api's in cacheflush.hArjan van de Ven2008-04-17
| | | | | | | | | | The new cacheflush.h API's didn't have any comments describing how they're to be used yet and the conventions around these functions. This patch adds comments to this effect; in order for that to be a logical series, some prototypes had to move around. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: simplify sync_test_bit(), improveJeremy Fitzhardinge2008-04-17
| | | | | | | | Using a naked parameterless macro could lead to other tokens being unexpectedly replaced. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86 floppy: kill off the 'register' keyword from headerJesper Juhl2008-04-17
| | | | | | | | | | | | | When compilers became generally better at optimizing code than humans, the register keyword became mostly useless. For the floppy driver it certainly is since it's so slow compared to the rest of the system that optimizing access to a single variable or two isn't going to make any real difference So let's just leave it to the compiler - it'll do a better job anyway. This patch does away with a few register keywords in the x86 floppy driver. Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: move apic declarations to mach_apic.hGlauber Costa2008-04-17
| | | | | | | take them out of the x86_64-specific asm/mach_apic.h Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: move ipi definitions to mach_ipi.hGlauber Costa2008-04-17
| | | | | | | take them out of the x86_64-only asm/mach_apic.h Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: split large page mapping for AMD TSEGAndi Kleen2008-04-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On AMD SMM protected memory is part of the address map, but handled internally like an MTRR. That leads to large pages getting split internally which has some performance implications. Check for the AMD TSEG MSR and split the large page mapping on that area explicitely if it is part of the direct mapping. There is also SMM ASEG, but it is in the first 1MB and already covered by the earlier split first page patch. Idea for this came from an earlier patch by Andreas Herrmann On a RevF dual Socket Opteron system kernbench shows a clear improvement from this: (together with the earlier patches in this series, especially the split first 2MB patch) [lower is better] no split stddev split stddev delta Elapsed Time 87.146 (0.727516) 84.296 (1.09098) -3.2% User Time 274.537 (4.05226) 273.692 (3.34344) -0.3% System Time 34.907 (0.42492) 34.508 (0.26832) -1.1% Percent CPU 322.5 (38.3007) 326.5 (44.5128) +1.2% => About 3.2% improvement in elapsed time for kernbench. With GB pages on AMD Fam1h the impact of splitting is much higher of course, since it would split two full GB pages (together with the first 1MB split patch) instead of two 2MB pages. I could not benchmark a clear difference in kernbench on gbpages, so I kept it disabled for that case That was only limited benchmarking of course, so if someone was interested in running more tests for the gbpages case that could be revisited (contributions welcome) I didn't bother implementing this for 32bit because it is very unlikely the 32bit lowmem mapping overlaps into the TSEG near 4GB and the 2MB low split is already handled for both. [ mingo@elte.hu: do it on gbpages kernels too, there's no clear reason why it shouldnt help there. ] Signed-off-by: Andi Kleen <ak@suse.de> Acked-by: andreas.herrmann3@amd.com Cc: mingo@elte.hu Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: re-add rdmsrl_safeAndi Kleen2008-04-17
| | | | | | | | | | | | | RDMSR for 64bit values with exception handling. Makes it easier to deal with 64bit valued MSRs. The old 64bit code base had that too as checking_rdmsrl(), but it got dropped somehow. Signed-off-by: Andi Kleen <andi@firstfloor.org> Cc: andreas.herrmann3@amd.com Cc: mingo@elte.hu Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: add set_memory_4k to pageattr.cAndi Kleen2008-04-17
| | | | | | | | | | | | | | | | | | | Add a new function to force split large pages into 4k pages. This is needed for some followup optimizations. I had to add a new field to cpa_data to pass down the information that try_preserve_large_page should not run. Right now no set_page_4k() because I didn't need it and all the specialized users I have in mind would be more comfortable with pure addresses. I also didn't export it because it's unlikely external code needs it. Signed-off-by: Andi Kleen <ak@suse.de> Cc: andreas.herrmann3@amd.com Cc: mingo@elte.hu Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: account overlapped mappings in max_pfn_mappedAndi Kleen2008-04-17
| | | | | | | | | | | When end_pfn is not aligned to 2MB (or 1GB) then the kernel might map more memory than end_pfn. Account this in max_pfn_mapped. Signed-off-by: Andi Kleen <ak@suse.de> Cc: andreas.herrmann3@amd.com Cc: mingo@elte.hu Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: replace the now useless max_pfn_mapped defineThomas Gleixner2008-04-17
| | | | | Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: implement true end_pfn_mapped for 32bitAndi Kleen2008-04-17
| | | | | | | | | | | | | | Even on 32bit 2MB pages can map more memory than is in the true max_low_pfn if end_pfn is not highmem and not aligned to 2MB. Add a end_pfn_map similar to x86-64 that accounts for this fact. This is important for code that really needs to know about all mapping aliases. Signed-off-by: Andi Kleen <ak@suse.de> Cc: andreas.herrmann3@amd.com Cc: mingo@elte.hu Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: don't set up early exception handlers for external interruptsAndi Kleen2008-04-17
| | | | | | | | | | | | All of early setup runs with interrupts disabled, so there is no need to set up early exception handlers for vectors >= 32 This saves some minor text size. Signed-off-by: Andi Kleen <ak@suse.de> Cc: mingo@elte.hu Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: pgtable, document pde bitsJiri Slaby2008-04-17
| | | | | | | | Some of pde bits weren't documented, add the short description to them. Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Cc: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: spinlock ops are always-inlinedIngo Molnar2008-04-17
| | | | Signed-off-by: Ingo Molnar <mingo@elte.hu>
* include/asm-x86/xor_64.h: checkpatch cleanups - formatting onlyJoe Perches2008-04-17
| | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* include/asm-x86/xor_32.h: checkpatch cleanups - formatting onlyJoe Perches2008-04-17
| | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* include/asm-x86/voyager.h: checkpatch cleanups - formatting onlyJoe Perches2008-04-17
| | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* include/asm-x86/vmi.h: checkpatch cleanups - formatting onlyJoe Perches2008-04-17
| | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* include/asm-x86/vm86.h: checkpatch cleanups - formatting onlyJoe Perches2008-04-17
| | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* include/asm-x86/vga.h: checkpatch cleanups - formatting onlyJoe Perches2008-04-17
| | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* include/asm-x86/vdso.h: checkpatch cleanups - formatting onlyJoe Perches2008-04-17
| | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* include/asm-x86/user_64.h: checkpatch cleanups - formatting onlyJoe Perches2008-04-17
| | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* include/asm-x86/user32.h: checkpatch cleanups - formatting onlyJoe Perches2008-04-17
| | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* include/asm-x86/user_32.h: checkpatch cleanups - formatting onlyJoe Perches2008-04-17
| | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* include/asm-x86/unistd_64.h: checkpatch cleanups - formatting onlyJoe Perches2008-04-17
| | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* include/asm-x86/unistd_32.h: checkpatch cleanups - formatting onlyJoe Perches2008-04-17
| | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* include/asm-x86/unaligned.h: checkpatch cleanups - formatting onlyJoe Perches2008-04-17
| | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* include/asm-x86/uaccess_64.h: checkpatch cleanups - formatting onlyJoe Perches2008-04-17
| | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* include/asm-x86/uaccess_32.h: checkpatch cleanups - formatting onlyJoe Perches2008-04-17
| | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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