mirrors/serenity
1
0
Fork 0
mirror of https://github.com/SerenityOS/serenity.git synced 2025-01-23 18:02:05 -05:00
Code Issues Projects Releases Packages Wiki Activity
37032 commits 1 branch 0 tags 514 MiB
Commit graph

6956 commits

Author SHA1 Message Date
Linus Groh
62185452f0 Kernel: Query OS-enabled CPUID features again at the end of cpu_setup() 
For OSPKE this is a no-op as we don't enable PKU yet, but the state of
the OSXSAVE flag might have changed if we enabled XSAVE.
 2022-04-08 18:53:42 +01:00
Linus Groh
87aabb5ef7 Kernel: Rename OSPKU CPUID feature flag to OSPKE 
Unlike "XSAVE enabled by OS" being indicated by the OSXSAVE flag, in
this case it's "PKU enabled by OS" being indicated by the OSPKE flag.
 2022-04-08 18:53:42 +01:00
Tiaan Louw
678555af97 Kernel: Adjust includes after file reorganization 2022-04-08 15:06:33 +01:00
Jelle Raaijmakers
7826729ab2 Kernel: Track big lock blocked threads in separate list 
When we lock a mutex, eventually `Thread::block` is invoked which could
in turn invoke `Process::big_lock().restore_exclusive_lock()`. This
would then try to add the current thread to a different blocked thread
list then the one in use for the original mutex being locked, and
because it's an intrusive list, the thread is removed from its original
list during the `.append()`. When the original mutex eventually
unblocks, we no longer have the thread in the intrusive blocked threads
list and we panic.

Solve this by making the big lock mutex special and giving it its own
blocked thread list. Because the process big lock is temporary and is
being actively removed from e.g. syscalls, it's a matter of time before
we can also remove the fix introduced by this commit.

Fixes issue #9401.
 2022-04-06 18:27:19 +02:00
James Mintram
d94c7fa417 Kernel: Improve the aarch64 kernel source files disk layout 2022-04-06 08:56:20 +01:00
Andreas Kling
9b9b05eabf Kernel: Make sys$mmap() round requested VM size to page size multiple 
This fixes an issue where File::mmap() overrides would fail because they
were expecting to be called with a size evenly divisible by PAGE_SIZE.
 2022-04-05 22:26:37 +02:00
Andreas Kling
b28beb691e Kernel: Protect Mutex's thread lists with a spinlock 2022-04-05 14:44:50 +02:00
Andreas Kling
0a83c03546 Kernel: Don't unregister Region from RegionTree *before* unmapping it 
If we unregister from the RegionTree before unmapping, there's a race
where a new region can get inserted at the same address that we're about
to unmap. If this happens, ~Region() will then unmap the newly inserted
region, which now finds itself with cleared-out page table entries.
 2022-04-05 13:46:50 +02:00
Andreas Kling
a3db0ab14f Kernel: Remove MemoryManager::region_tree() accessor 
Let's not have a way to grab at the RegionTree from outside of MM.
 2022-04-05 13:45:10 +02:00
Andreas Kling
f8d798b667 Kernel: Move allocate_unbacked_region_anywhere() to MemoryManager 
This didn't need to be in RegionTree, and since it's specific to kernel
VM anyway, let's move it to MemoryManager.
 2022-04-05 13:45:10 +02:00
Andreas Kling
e0da8da657 Kernel: Move create_identity_mapped_region() to MemoryManager 
This had no business being in RegionTree, since RegionTree doesn't track
identity-mapped regions anyway. (We allow *any* address to be identity
mapped, not just the ones that are part of the RegionTree's range.)
 2022-04-05 13:45:10 +02:00
Andreas Kling
cfb61cbd54 Kernel: Add RegionTree::find_region_containing(address or range) 
Let's encapsulate looking up regions so clients don't have to dig into
RegionTree internals.
 2022-04-05 12:23:47 +02:00
Andreas Kling
da7ea2556e Kernel: Add RegionTree::remove(Region&) 
This allows clients to remove a region from the tree without reaching
into the RegionTree internals.
 2022-04-05 11:57:53 +02:00
Andreas Kling
f0f97e1db0 Kernel: Take the RegionTree spinlock when inspecting tree from outside 
This patch adds RegionTree::get_lock() which exposes the internal lock
inside RegionTree. We can then lock it from the outside when doing
lookups or traversal.

This solution is not very beautiful, we should find a way to protect
this data with SpinlockProtected or something similar. This is a stopgap
patch to try and fix the currently flaky CI.
 2022-04-05 01:15:22 +02:00
Andreas Kling
e3e1d79a7d Kernel: Remove unused ShouldDeallocateVirtualRange parameters 
Since there is no separate virtual range allocator anymore, this is
no longer used for anything.
 2022-04-05 01:15:22 +02:00
James Mintram
df9a833d7a Kernel: Add VERIFY_NOT_REACHED to aarch64 PageDirectory.cpp 2022-04-04 14:35:54 -07:00
James Mintram
283d8e8f51 Kernel: Add VERIFY_NOT_REACHED to aarch64 locking functions 2022-04-04 14:35:54 -07:00
James Mintram
e98ea8a977 Kernel: Add VERIFY_NOT_REACHED to the aarch64 handle_crash function 2022-04-04 14:35:54 -07:00
James Mintram
d014c0501d Kernel: Remove unused dummy function from dummy.cpp 2022-04-04 14:35:54 -07:00
James Mintram
bd7acd4b90 Kernel: Add VERIFY_NOT_REACHED to stub functions in aarch64 dummy.cpp 2022-04-04 14:35:54 -07:00
James Mintram
92a8383101 Kernel: Add VERIFY_NOT_REACHED to stub aarch64 Processor functions 2022-04-04 14:35:54 -07:00
James Mintram
463910df98 Kernel: Print out assertion info in __assertion_failed on aarch64 2022-04-04 22:25:33 +01:00
Andreas Kling
9bb45ab3a6 Kernel: Add debug logging to learn more about unexpected NP faults 2022-04-04 17:10:30 +02:00
Andreas Kling
d1f2d63840 Kernel: Remove unused Region::try_create_kernel_only() 2022-04-04 12:34:13 +02:00
Andreas Kling
63ddbaf68a Kernel: Tweak broken dbgln_if() in sys$fork() after RegionTree changes 2022-04-04 11:05:49 +02:00
Andreas Kling
12b612ab14 Kernel: Mark sys$adjtime() as not needing the big lock 
This syscall works on global kernel state and so doesn't need protection
from threads in the same process.
 2022-04-04 00:42:18 +02:00
Andreas Kling
4306422f29 Kernel: Mark sys$clock_settime() as not needing the big log 
This syscall ends up disabling interrupts while changing the time,
and the clock is a global resource anyway, so preventing threads in the
same process from running wouldn't solve anything.
 2022-04-04 00:42:18 +02:00
Andreas Kling
55814f6e0e Kernel: Mark sys$sched_{set,get}param() as not needing the big lock 
Both of these syscalls take the scheduler lock while accessing the
thread priority, so there's no reliance on the process big lock.
 2022-04-04 00:42:18 +02:00
Andreas Kling
9250ac0c24 Kernel: Randomize non-specific VM allocations done by sys$execve() 
Stuff like TLS regions, main thread stacks, etc. All deserve to be
randomized unless the ELF requires specific placement. :^)
 2022-04-04 00:42:18 +02:00
Brian Gianforcaro
8b750998d2 Kernel: Fix aarch64 kernel build on case sensitive file systems 
The dummy file has the wrong case, so it would fail to be found on case
sensitive file systems.
 2022-04-03 15:18:36 -07:00
Idan Horowitz
d6e4a25e0c Kernel: Use the InstrusiveRedBlackTree::begin_from(V&) API 
This let's us skip an O(logn) tree traversal.
 2022-04-04 00:16:11 +02:00
Idan Horowitz
30e6b313b4 Kernel: Remove false condition in RegionTree::allocate_range_specific 
Since find_largest_not_above returns the highest region that is below
the end of the request range, no region after it can intersect with it.
 2022-04-04 00:16:11 +02:00
James Mintram
f943e97b76 Kernel: Add RegionTree and remove VirtualRangeAllocator from aarch64 2022-04-04 00:14:20 +02:00
Andreas Kling
db75bab493 Kernel: Actually fix accidental overlaps in allocate_range_specific() 
Thanks to Idan for spotting this! :^)
 2022-04-03 23:58:57 +02:00
James Mintram
2b442ae44f Kernel: Add kmalloc.cpp to aarch64 2022-04-03 23:21:04 +02:00
Linus Groh
b0f701d053 Kernel: Convert ProcessorInfo::build_brand_string() to StringBuilder 2022-04-03 23:20:33 +02:00
Linus Groh
33004f9b9d Kernel: Add hypervisor_vendor_id entry to /proc/cpuinfo 2022-04-03 23:20:33 +02:00
Linus Groh
0f27432ec6 Kernel+SystemMonitor+lscpu: Rename 'CPUID' -> 'Vendor ID' 
This is what the Intel manual, as well as Linux's cpuinfo calls it.
 2022-04-03 23:20:33 +02:00
Linus Groh
3f9c2495e5 Kernel: Remove EBX, ECX, and EDX values from hypervisor dmesgln() 2022-04-03 23:20:33 +02:00
Linus Groh
8d96525b9d Kernel: Move hypervisor vendor ID string to ProcessorInfo 
This will make it possible to expose it in /proc/cpuinfo. :^)
 2022-04-03 23:20:33 +02:00
Linus Groh
f6181cd47e Kernel: Make ProcessorInfo::build_foo_string() private 2022-04-03 23:20:33 +02:00
Linus Groh
afce63fffc Kernel: Move feature string building to ProcessorInfo 
Other than a dmesgln(), ProcessorInfo is the only user of this function
and is already responsible for building other CPUID-related strings.
 2022-04-03 23:20:33 +02:00
Linus Groh
53a95a5347 Kernel: Rename some ProcessorInfo members to match Intel manual 
Let's use terminology from the the Intel manual to avoid confusion.
Also add `_string` suffixes to better distinguish the numeric values
from the string values.
 2022-04-03 23:20:33 +02:00
Linus Groh
ebe2cf8995 Kernel: Move private ProcessorInfo members to the end 2022-04-03 23:20:33 +02:00
Andreas Kling
9765f9f67e Kernel: Fix accidental overlaps in RegionTree::allocate_range_specific() 
Thanks to Idan for spotting this! :^)
 2022-04-03 23:07:29 +02:00
Andreas Kling
36d829b97c Kernel: Mark sys$listen() as not needing the big lock 
This syscall already performs the necessary locking and so doesn't
need to rely on the process big lock.
 2022-04-03 22:22:22 +02:00
Andreas Kling
e103c5fe2d Kernel: Don't hog file descriptor table lock in sys$bind() 
We don't need to hold the lock across the entire syscall. Once we've
fetched the open file description we're interested in, we can let go.
 2022-04-03 22:20:34 +02:00
Andreas Kling
85ceab1fec Kernel: Don't hog file descriptor table lock in sys$listen() 
We don't need to hold the lock across the entire syscall. Once we've
fetched the open file description we're interested in, we can let go.
 2022-04-03 22:18:57 +02:00
Andreas Kling
bc4282c773 Kernel: Mark sys$sendfd() and sys$recvfd() as not needing the big lock 
These syscalls already perform the necessary locking and don't rely on
the process big lock.
 2022-04-03 22:06:03 +02:00
Andreas Kling
92dfcdb6b1 Kenrel: Update a dmesgln() to say "RegionTree" instead of old class name 2022-04-03 22:00:19 +02:00