| Age | Commit message (Collapse) | Author |
|---|
|
PiperOrigin-RevId: 200144655
Change-Id: I5a753c74b75007b7714d6fe34aa0d2e845dc5c41
|
|
PiperOrigin-RevId: 199877174
Change-Id: I9d19ea301608c2b989df0a6123abb1e779427853
|
|
Because of the KVM shadow page table implementation, modifications made
to guest page tables from host mode may not be syncronized correctly,
resulting in undefined behavior. This is a KVM bug: page table pages
should also be tracked for host modifications and resynced appropriately
(e.g. the guest could "DMA" into a page table page in theory).
However, since we can't rely on this being fixed everywhere, workaround
the issue by forcing page table modifications to be in guest mode. This
will generally be the case anyways, but now if an exit occurs during
modifications, we will re-enter and perform the modifications again.
PiperOrigin-RevId: 199587895
Change-Id: I83c20b4cf2a9f9fa56f59f34939601dd34538fb0
|
|
Instead of associating a single PCID with each set of page tables (which
will reach the maximum quickly), allow a dynamic pool for each vCPU.
This is the same way that Linux operates. We also split management of
PCIDs out of the page tables themselves for simplicity.
PiperOrigin-RevId: 199585631
Change-Id: I42f3486ada3cb2a26f623c65ac279b473ae63201
|
|
In order to prevent possible garbage collection and reuse of page table
pages prior to invalidation, introduce a former allocator abstraction
that can ensure entries are held during a single traversal. This also
cleans up the abstraction and splits it out of the machine itself.
PiperOrigin-RevId: 199581636
Change-Id: I2257d5d7ffd9c36f9b7ecd42f769261baeaf115c
|
|
This is necessary to prevent races with invalidation. It is currently
possible that page tables are garbage collected while paging caches
refer to them. We must ensure that pages are held until caches can be
invalidated. This is not achieved by this goal alone, but moving locking
to outside the page tables themselves is a requisite.
PiperOrigin-RevId: 198920784
Change-Id: I66fffecd49cb14aa2e676a84a68cabfc0c8b3e9a
|
|
Previously, the vCPU FS was always correct because it relied on the
reset coming out of the switch. When that doesn't occur, for example,
using bluepill directly, the FS value can be incorrect leading to
strange corruption.
This change is necessary for a subsequent change that enforces guest
mode for page table modifications, and it may reduce test flakiness.
(The problematic path may occur in tests, but does not occur in the
actual platform.)
PiperOrigin-RevId: 198648137
Change-Id: I513910a973dd8666c9a1d18cf78990964d6a644d
|
|
This is a refactor of ring0 and ring0/pagetables that changes from
individual arguments to opts structures. This should involve no
functional changes, but sets the stage for subsequent changes.
PiperOrigin-RevId: 198627556
Change-Id: Id4460340f6a73f0c793cd879324398139cd58ae9
|
|
Especially in situations with small numbers of vCPUs, the existing
system resulted in excessive thrashing. Now, execution contexts
co-ordinate as smoothly as they can to share a small number of cores.
PiperOrigin-RevId: 197483323
Change-Id: I0afc0c5363ea9386994355baf3904bf5fe08c56c
|
|
PiperOrigin-RevId: 196781718
Change-Id: I889766eed871929cdc247c6b9aa634398adea9c9
|
|
PiperOrigin-RevId: 196780209
Change-Id: I89f39eec914ce54a7c6c4f28e1b6d5ff5a7dd38d
|
|
This also removes the dependency on tmutex.
PiperOrigin-RevId: 196764317
Change-Id: I523fb67454318e1a2ca9da3a08e63bfa3c1eeed3
|
|
PiperOrigin-RevId: 196615029
Change-Id: Idfa383a9aee6a9397167a4231ce99d0b0e5b9912
|
|
PiperOrigin-RevId: 196613447
Change-Id: Ib76902896798f072c3031b0c5cf7b433718928b7
|
|
PiperOrigin-RevId: 196611084
Change-Id: I6afa6b01e1dcd2aa9776dfc0f910874cc6b8d72c
|
|
PiperOrigin-RevId: 196609789
Change-Id: Ie261eea3b7fa05b6c348ca93e229de26cbd4dc7d
|
|
PiperOrigin-RevId: 196291289
Change-Id: Ie3487be029850b0b410b82416750853a6c4a2b00
|
|
PiperOrigin-RevId: 195742598
Change-Id: Ibd4a8e4394e268c87700b6d1e50b4b37dfce5182
|
|
PiperOrigin-RevId: 194583126
Change-Id: Ica1d8821a90f74e7e745962d71801c598c652463
|
