summaryrefslogtreecommitdiff
path: root/src/arch/x86/faults.hh
AgeCommit message (Collapse)Author
2015-11-16x86: Invalidating TLB entry on page faultSwapnil Haria
As per the x86 architecture specification, matching TLB entries need to be invalidated on a page fault. For instance, after a page fault due to inadequate protection bits on a TLB hit, the TLB entry needs to be invalidated. This behavior is clearly specified in the x86 architecture manuals from both AMD and Intel. This invalidation is missing currently in gem5, due to which linux kernel versions 3.8 and up cannot be simulated efficiently. This is exposed by a linux optimisation in commit e4a1cc56e4d728eb87072c71c07581524e5160b1, which removes a tlb flush on updating page table entries in x86. Testing: Linux kernel versions 3.8 onwards were booting very slowly in FS mode, due to repeated page faults (~300000 before the first print statement in a bash file). Ensured that page fault rate drops drastically and observed reduction in boot time from order of hours to minutes for linux kernel v3.8 and v3.11
2015-04-29x86: change divide-by-zero fault to divide-errorNilay Vaish
Same exception is raised whether division with zero is performed or the quotient is greater than the maximum value that the provided space can hold. Divide-by-Zero is the AMD terminology, while Divide-Error is Intel's.
2015-02-11sim: Move the BaseTLB to src/arch/generic/Andreas Sandberg
The TLB-related code is generally architecture dependent and should live in the arch directory to signify that. --HG-- rename : src/sim/BaseTLB.py => src/arch/generic/BaseTLB.py rename : src/sim/tlb.cc => src/arch/generic/tlb.cc rename : src/sim/tlb.hh => src/arch/generic/tlb.hh
2014-09-27arch: Use const StaticInstPtr references where possibleAndreas Hansson
This patch optimises the passing of StaticInstPtr by avoiding copying the reference-counting pointer. This avoids first incrementing and then decrementing the reference-counting pointer.
2013-09-18x86: Expose the interrupt vector in faultsAndreas Sandberg
This patch allows a hardware virtualized CPU to discover which interrupt to deliver to the guest.
2012-03-19gcc: Clean-up of non-C++0x compliant code, first stepsAndreas Hansson
This patch cleans up a number of minor issues aiming to get closer to compliance with the C++0x standard as interpreted by gcc and clang (compile with std=c++0x and -pedantic-errors). In particular, the patch cleans up enums where the last item was succeded by a comma, namespaces closed by a curcly brace followed by a semi-colon, and the use of the GNU-extension typeof (replaced by templated functions). It does not address variable-length arrays, zero-size arrays, anonymous structs, range expressions in switch statements, and the use of long long. The generated CPU code also has a large number of issues that remain to be fixed, mainly related to overflows in implicit constant conversion (due to shifts).
2011-09-30X86: Remove FULL_SYSTEM from the x86 faults.Gabe Black
2011-09-27Faults: Replace calls to genMachineCheckFault with M5PanicFault.Gabe Black
2011-04-15includes: sort all includesNathan Binkert
2010-10-22X86: Implement genMachineCheckFault.Gabe Black
Even though this shouldn't ever be used, it might get called speculatively and shouldn't panic.
2010-09-14X86: Make unrecognized instructions behave better in x86.Gabe Black
2010-09-13Faults: Pass the StaticInst involved, if any, to a Fault's invoke method.Gabe Black
Also move the "Fault" reference counted pointer type into a separate file, sim/fault.hh. It would be better to name this less similarly to sim/faults.hh to reduce confusion, but fault.hh matches the name of the type. We could change Fault to FaultPtr to match other pointer types, and then changing the name of the file would make more sense.
2010-08-23X86: Make the TLB fault instead of panic when something is unmapped in SE mode.Gabe Black
The fault object, if invoked, would then panic. This is a bit less direct, but it means speculative execution won't panic the simulator.
2010-05-23copyright: Change HP copyright on x86 code to be more friendlyNathan Binkert
2009-04-19X86: Implement the STARTUP IPI.Gabe Black
2009-04-19X86: Implement the INIT IPI.Gabe Black
2009-04-08tlb: More fixing of unified TLBNathan Binkert
2009-03-07build: fix compiler warnings in g++ 3.4Nathan Binkert
2009-02-25X86: Add a trace flag for tracing faults.Gabe Black
2009-02-25X86: Make the X86 TLB take advantage of delayed translations, and get rid of ↵Gabe Black
the fake TLB miss faults.
2009-02-23X86: Pass whether an access was a read/write/fetch so faults can behave ↵Gabe Black
accordingly.
2009-02-01X86: All x86 fault classes now attempt to do something useful.Gabe Black
2009-02-01X86: Make the fault classes handle error codes better.Gabe Black
2009-02-01X86: Keep track of the vector for all exceptions/faults.Gabe Black
2008-10-12X86: Panic when an unimplemented fault is invoked, rather than spinning foreverGabe Black
2008-10-12X86: Make the x86 interrupt fault kick off the interrupt microcode.Gabe Black
2008-10-12X86: Make the local APIC process interrupts and send them to the CPU.Gabe Black
2008-10-12X86: Make the local APIC handle interrupt messages from the IO APIC.Gabe Black
2008-10-12X86: Make the bases for x86 fault class public.Gabe Black
2007-11-12X86: Work on the page table walker, TLB, and related faults.Gabe Black
--HG-- extra : convert_revision : 9edde958b7e571c07072785f18f9109f73b8059f
2007-10-07X86: Make faults maintain an error code which gets pushed on the stack.Gabe Black
--HG-- extra : convert_revision : 7576f8cfaec9ddfb65e6ba7a6f64a5f453a42069
2007-10-02X86: Start implementing the x86 tlb which will handle segmentation ↵Gabe Black
permission and limit checks and paging. --HG-- extra : convert_revision : 6072f7d9eecbaa066d39d6da7f0180ea4a2615af
2007-10-02X86: Add classes for the actual x86 faults.Gabe Black
--HG-- extra : convert_revision : bc060a01b5415551b335ca68ccbf126333ae20b0
2007-08-26Address translation: Make the page table more flexible.Gabe Black
The page table now stores actual page table entries. It is still a templated class here, but this will be corrected in the near future. --HG-- extra : convert_revision : 804dcc6320414c2b3ab76a74a15295bd24e1d13d
2007-07-20Make the "name" function const.Gabe Black
--HG-- extra : convert_revision : eb71bc3edd92a544a5333786635fce550aaef233
2007-04-10Fix up the base x86 fault object and create a fault to be generated by ↵Gabe Black
unimplemented instructions in their microcode. This is useful if certain variations of an instruction are implemented, but, for instance, it's memory based versions aren't. --HG-- extra : convert_revision : 24e69c5a6a0af2d0cf67e858a051ae6624bb300f
2007-03-05Added fault generation functions. I would still like to see these go away. ↵Gabe Black
The page table fault should be moved into sim/faults.hh because it's a "fake" m5 fault for se mode and shouldn't vary between architectures. --HG-- extra : convert_revision : cafe25befd64f83a424c1a09f5e62a16df5408ad
2007-03-05Added a missing include.Gabe Black
--HG-- extra : convert_revision : 62583e5a5647913fb36e1aae265e8ac52a165829
2007-03-05Stub x86 Fault class which just panics.Gabe Black
--HG-- extra : convert_revision : abfcf4005ec636b1e6c085515b63c1d8e69e3370
2007-03-03Add build hooks for x86.Gabe Black
--HG-- extra : convert_revision : 438eb74f14e6ea60bab5012110f3946c9213786e
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-07 20:20:35 +0000