| Commit message (Collapse) | Author | Age | Files | Lines |
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Do not leave stale 4K TLB entries on pde (superpage) removal or
protection change.
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CLFLUSH does not need barriers, the instruction is ordered WRT other writes.
Use CLFLUSHOPT when available.
MFC r312555:
Use SFENCE for ordering CLFLUSHOPT.
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Apply r210555 to 64 bit linux support:
The interpreter name should no longer be treated as a buffer that can be
overwritten.
PR: 216346
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amd64: implement pagezero using rep stos
The current implementation uses non-temporal writes. This turns out to
be detrimental to performance if the page is used shortly after, which
is the typical case with page faults.
Switch to rep stos.
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308820:
Report page faults due to reserved bits in PTEs as a separate fault type.
Rather than reporting a page fault due to a bad PTE as a protection
violation with the "rsv" flag, treat these faults as a separate type of
fault altogether.
308821:
MFamd64: Various fatal page fault fixes.
- If a page fault is triggered due to reserved bits in a PTE, treat it
as a fatal fault and panic.
- If PG_NX is in use, report whether a fatal page fault is due to an
instruction fetch or a data access.
- If a fatal page fault is due to reserved bits in a PTE, report that as
the page fault type rather than a protection violation.
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Fix typo.
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303753:
Don't permit mappings of invalid physical addresses on amd64 via /dev/mem.
308004:
MFamd64: Add bounds checks on addresses used with /dev/mem.
Reject attempts to read from or memory map offsets in /dev/mem that are
beyond the maximum-supported physical address of the current CPU.
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must be contiguous in physical memory
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The argument validation in r296956 was not enough to close all possible
overflows in sysarch(2).
Submitted by: Kun Yang <kun.yang chaitin.com>
Patch by: kib
Security: SA-16:15
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Add routines to trigger a function level reset (FLR) of a PCI-express
device via the PCI-express device control register. This also includes
support routines to wait for pending transactions to complete as well
as calculating the maximum completion timeout permitted by a device.
Change the ppt(4) driver to reset pass through devices before attaching
to a VM during startup and before detaching from a VM during shutdown.
Sponsored by: Chelsio Communications
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304858:
Enable I/O MMU when PCI pass through is first used.
Rather than enabling the I/O MMU when the vmm module is loaded,
defer initialization until the first attempt to pass a PCI device
through to a guest. If the I/O MMU fails to initialize or is not
present, than fail the attempt to pass a PCI device through to a
guest.
The hw.vmm.force_iommu tunable has been removed since the I/O MMU is
no longer enabled during boot. However, the I/O MMU support can be
disabled by setting the hw.vmm.iommu.enable tunable to 0 to prevent
use of the I/O MMU on any systems where it is buggy.
305485:
Leave ppt devices in the host domain when they are not attached to a VM.
This allows a pass through device to be reset to a normal device driver
on the host and reused on the host. ppt devices are now always active in
some I/O MMU domain when the I/O MMU is active, either the host domain
or the domain of a VM they are attached to.
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Remove trailing space.
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PR: 208168
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Move msix_disable_migration under #ifdef SMP since it doesn't make sense
for !SMP kernels.
PR: 212014
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Unconditionally perform checks that FPU region was entered, when #NM
exception is caught in kernel mode.
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borrowed from Linux
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302181:
Add a tunable to disable migration of MSI-X interrupts.
The new 'machdep.disable_msix_migration' tunable can be set to 1 to
disable migration of MSI-X interrupts.
Xen versions prior to 4.6.0 do not properly handle updates to MSI-X
table entries after the initial write. In particular, the operation
to unmask a table entry after updating it during migration is not
propagated to the "real" table for passthrough devices causing the
interrupt to remain masked. At least some systems in EC2 are
affected by this bug when using SRIOV. The tunable can be set in
loader.conf as a workaround.
302635:
xen: automatically disable MSI-X interrupt migration
If the hypervisor version is smaller than 4.6.0. Xen commits 74fd00 and
70a3cb are required on the hypervisor side for this to be fixed, and those
are only included in 4.6.0, so stay on the safe side and disable MSI-X
interrupt migration on anything older than 4.6.0.
It should not cause major performance degradation unless a lot of MSI-X
interrupts are allocated.
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Fix a copy/paste bug introduced during X86_64 Linuxulator work.
FreeBSD support NX bit on X86_64 processors out of the box, for i386 emulation
use READ_IMPLIES_EXEC flag, introduced in r302515.
While here move common part of mmap() and mprotect() code to the files in compat/linux
to reduce code dupcliation between Linuxulator's.
MFC r302518, r302626:
Add linux_mmap.c to the appropriate conf/files.
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Implement Linux personality() system call mainly due to READ_IMPLIES_EXEC flag.
In Linux if this flag is set, PROT_READ implies PROT_EXEC for mmap().
Linux/i386 set this flag automatically if the binary requires executable stack.
READ_IMPLIES_EXEC flag will be used in the next Linux mmap() commit.
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hyperv/vmbus: Rename ISR functions
MFC after: 1 week
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6601
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atomic: Add testandclear on i386/amd64
Reviewed by: kib
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D6381
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297931
Expose doreti as a global symbol on amd64 and i386.
doreti provides the common code path for returning from interrupt
andlers on x86. Exposing doreti as a global symbol allows kernel
modules to include low-level interrupt handlers instead of requiring
all low-level handlers to be statically compiled into the kernel.
Submitted by: Howard Su <howard0su@gmail.com>
Reviewed by: kib
298022
hyperv: Deprecate HYPERV option by moving Hyper-V IDT vector into vmbus
Submitted by: Jun Su <junsu microsoft com>
Reviewed by: jhb, kib, sephe
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D5910
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Do not access pv_table array for fictitious pages.
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Avoid spurious EINVAL in amd64 pmap_change_attr().
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Add macro to convert errno and use it when appropriate.
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Correct an argument param of linux_sched_* system calls as a struct l_sched_param
does not defined due to it's nature.
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Add a forgotten in r283424 .eh_frame section with CFI & FDE records to allow
stack unwinding through signal handler.
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Check for overflow and return EINVAL if detected. Use unsigned index.
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