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2020-02-25Merge pull request #1271 from lubinszARM:pr_ring0_1gVisor bot
PiperOrigin-RevId: 297230721
2020-02-18ring0/pagetables: fix typogVisor bot
PiperOrigin-RevId: 295770717
2020-02-14passed the kvm test case of "TestKernelSyscall" on Arm64Bin Lu
For kvm test case "TestKernelSyscall", redpill/syscall(-1) in guest kernel level will be trapped in el1_svc. And in el1_svc, we use mmio_exit to leave the guest. Signed-off-by: Bin Lu <bin.lu@arm.com>
2020-01-29supporting sError in guest kernel on Arm64Bin Lu
For test case 'TestBounce', we use KVM_SET_VCPU_EVENTS to trigger sError to leave guest. Signed-off-by: Bin Lu <bin.lu@arm.com>
2020-01-27Update package locations.Adin Scannell
Because the abi will depend on the core types for marshalling (usermem, context, safemem, safecopy), these need to be flattened from the sentry directory. These packages contain no sentry-specific details. PiperOrigin-RevId: 291811289
2020-01-27Fix licenses.Adin Scannell
The preferred Copyright holder is "The gVisor Authors". PiperOrigin-RevId: 291786657
2020-01-27Standardize on tools directory.Adin Scannell
PiperOrigin-RevId: 291745021
2020-01-21Merge pull request #1275 from lubinszARM:pr_ring0_5gVisor bot
PiperOrigin-RevId: 290839263
2020-01-21Merge pull request #1274 from lubinszARM:pr_ring0_4gVisor bot
PiperOrigin-RevId: 290811598
2020-01-16Merge pull request #1272 from lubinszARM:pr_ring0_2gVisor bot
PiperOrigin-RevId: 290113719
2020-01-09New sync package.Ian Gudger
* Rename syncutil to sync. * Add aliases to sync types. * Replace existing usage of standard library sync package. This will make it easier to swap out synchronization primitives. For example, this will allow us to use primitives from github.com/sasha-s/go-deadlock to check for lock ordering violations. Updates #1472 PiperOrigin-RevId: 289033387
2020-01-08Merge pull request #1273 from lubinszARM:pr_ring_3gVisor bot
PiperOrigin-RevId: 288743614
2019-12-26Merge pull request #1460 from lubinszARM:pr_clean_code1gVisor bot
PiperOrigin-RevId: 287221280
2019-12-24slight changes to ring0&pagetables for Arm64Bin Lu
There are 2 jobs have been finished in this patch: 1, a comment was added to explain the purpose of the extra NOPs in Vectors(). 2, some merge errors were fixed. Signed-off-by: Bin Lu <bin.lu@arm.com>
2019-12-18Merge pull request #1322 from lubinszARM:pr_vfp_ring0gVisor bot
PiperOrigin-RevId: 286259750
2019-12-18supporting lazy-fpsimd in guest on Arm64Bin Lu
Several jobs were finished in this patch: 1, provide functions to get/set fpcr/fpsr/vregs 2, support lazy-fpsimd-context-switch in el1 Signed-off-by: Bin Lu <bin.lu@arm.com>
2019-11-26passed the kvm test case of "TestApplicationFault" on Arm64 platformBin Lu
For test case "TestApplicationFault", Memory-fault in guest user level will be trapped in el0_da. And in el0_da, we use mmio_exit to leave the KVM guest. Signed-off-by: Bin Lu <bin.lu@arm.com>
2019-11-26passed the kvm test case of "TestApplicationSyscall" on Arm64 platformBin Lu
For test case "TestApplicationSyscall", Syscall in guest user level will be trapped in el0_svc. And in el0_svc, we use mmio_exit to leave the KVM guest for now. Signed-off-by: Bin Lu <bin.lu@arm.com>
2019-11-26Prepare the vcpu environment for a container applicationBin Lu
Mainly 2 jobs were finished in this patch: 1, context switching for a container application: a, R0-R30 b, pc\pstate\sp_el0 c, pagetable_el0 for container application This job can help us to pass the following test cases: "TestApplicationSyscall", "TestApplicationFault" 2, checking pagetable_el0 is empty This job can help us to pass the following test case: "TestInvalidate" Signed-off-by: Bin Lu <bin.lu@arm.com>
2019-11-26passed the kvm test case of "TestKernelFault" on Arm64 platformBin Lu
Signed-off-by: Bin Lu <bin.lu@arm.com>
2019-11-22enable ring0/pagetables to support arm64lubinszARM
Signed-off-by: Bin Lu <bin.lu@arm.com> COPYBARA_INTEGRATE_REVIEW=https://github.com/google/gvisor/pull/891 from lubinszARM:pr_pagetable 2385de75a8662af3ab1ae289dd74dd0e5dcfaf66 PiperOrigin-RevId: 282013224
2019-11-11Merge pull request #918 from lubinszARM:pr_ring0gVisor bot
PiperOrigin-RevId: 279840214
2019-10-22enable ring0 to support arm64Bin Lu
This patch enabled the basic framework for arm64 guest. Serveral jobs were finished in this patch: 1, ring0.Vectors() 2, switchToUser() 3, basic framwork for Arm64 guest. Signed-off-by: Bin Lu <bin.lu@arm.com>
2019-10-16Reorder BUILD license and load functions in gvisor.Kevin Krakauer
PiperOrigin-RevId: 275139066
2019-09-12Remove go_test from go_stateify and go_marshalMichael Pratt
They are no-ops, so the standard rule works fine. PiperOrigin-RevId: 268776264
2019-07-09tss: block userspace access to all I/O ports.Liu Hua
A userspace process (CPL=3) can access an i/o port if the bit corresponding to the port is set to 0 in the I/O permission bitmap. Configure the I/O permission bitmap address beyond the last valid byte in the TSS so access to all i/o ports is blocked. Signed-off-by: Liu Hua <sdu.liu@huawei.com> Change-Id: I3df76980c3735491db768f7210e71703f86bb989 PiperOrigin-RevId: 257336518
2019-06-27Fix various spelling issues in the documentationMichael Pratt
Addresses obvious typos, in the documentation only. COPYBARA_INTEGRATE_REVIEW=https://github.com/google/gvisor/pull/443 from Pixep:fix/documentation-spelling 4d0688164eafaf0b3010e5f4824b35d1e7176d65 PiperOrigin-RevId: 255477779
2019-06-13Update canonical repository.Adin Scannell
This can be merged after: https://github.com/google/gvisor-website/pull/77 or https://github.com/google/gvisor-website/pull/78 PiperOrigin-RevId: 253132620
2019-04-29Change copyright notice to "The gVisor Authors"Michael Pratt
Based on the guidelines at https://opensource.google.com/docs/releasing/authors/. 1. $ rg -l "Google LLC" | xargs sed -i 's/Google LLC.*/The gVisor Authors./' 2. Manual fixup of "Google Inc" references. 3. Add AUTHORS file. Authors may request to be added to this file. 4. Point netstack AUTHORS to gVisor AUTHORS. Drop CONTRIBUTORS. Fixes #209 PiperOrigin-RevId: 245823212 Change-Id: I64530b24ad021a7d683137459cafc510f5ee1de9
2019-04-29Allow and document bug ids in gVisor codebase.Nicolas Lacasse
PiperOrigin-RevId: 245818639 Change-Id: I03703ef0fb9b6675955637b9fe2776204c545789
2019-03-21Allow BP and OF can be called from user spaceYong He
Change the DPL from 0 to 3 for Breakpoint and Overflow, then user space could trigger Breakpoint and Overflow as excepected. Change-Id: Ibead65fb8c98b32b7737f316db93b3a8d9dcd648 PiperOrigin-RevId: 239736648
2019-01-31Remove license commentsMichael Pratt
Nothing reads them and they can simply get stale. Generated with: $ sed -i "s/licenses(\(.*\)).*/licenses(\1)/" **/BUILD PiperOrigin-RevId: 231818945 Change-Id: Ibc3f9838546b7e94f13f217060d31f4ada9d4bf0
2018-10-31kvm: simplify floating point logic.Adin Scannell
This reduces the number of floating point save/restore cycles required (since we don't need to restore immediately following the switch, this always happens in a known context) and allows the kernel hooks to capture state. This lets us remove calls like "Current()". PiperOrigin-RevId: 219552844 Change-Id: I7676fa2f6c18b9919718458aa888b832a7db8cab
2018-10-23Track paths and provide a rename hook.Adin Scannell
This change also adds extensive testing to the p9 package via mocks. The sanity checks and type checks are moved from the gofer into the core package, where they can be more easily validated. PiperOrigin-RevId: 218296768 Change-Id: I4fc3c326e7bf1e0e140a454cbacbcc6fd617ab55
2018-10-19Use correct company name in copyright headerIan Gudger
PiperOrigin-RevId: 217951017 Change-Id: Ie08bf6987f98467d07457bcf35b5f1ff6e43c035
2018-08-22Add separate Recycle method for allocator.Adin Scannell
This improves debugging for pagetable-related issues. PiperOrigin-RevId: 209827795 Change-Id: I4cfa11664b0b52f26f6bc90a14c5bb106f01e038
2018-08-08Protect PCIDs with a mutex.Adin Scannell
Because the Drop method may be called across vCPUs, it is necessary to protect the PCID database with a mutex to prevent concurrent modification. The PCID is assigned prior to entersyscall, so it's safe to block. PiperOrigin-RevId: 207992864 Change-Id: I8b36d55106981f51e30dcf03e12886330bb79d67
2018-08-06Fix a bug in PCIDs.AssignShiruRen
Store the new assigned pcid in p.cache[pt]. Signed-off-by: ShiruRen <renshiru2000@gmail.com> Change-Id: I4aee4e06559e429fb5e90cb9fe28b36139e3b4b6 PiperOrigin-RevId: 207563833
2018-07-27stateify: support explicit annotation mode; convert refs and stack packages.Zhaozhong Ni
We have been unnecessarily creating too many savable types implicitly. PiperOrigin-RevId: 206334201 Change-Id: Idc5a3a14bfb7ee125c4f2bb2b1c53164e46f29a8
2018-07-16Add CPUID faulting for ptrace and KVM.Adin Scannell
PiperOrigin-RevId: 204858314 Change-Id: I8252bf8de3232a7a27af51076139b585e73276d4
2018-06-11Minor ring0 interface cleanup.Adin Scannell
- Remove unused methods. - Provide declaration for asm function. PiperOrigin-RevId: 200146850 Change-Id: Ic455c96ffe0d2e78ef15f824eb65d7de705b054a
2018-06-11Make page tables split-safe.Adin Scannell
In order to minimize the likelihood of exit during page table modifications, make the full set of page table functions split-safe. This is not strictly necessary (and you may still incur splits due to allocations from the allocator pool) but should make retries a very rare occurance. PiperOrigin-RevId: 200146688 Change-Id: I8fa36aa16b807beda2f0b057be60038258e8d597
2018-06-11Handle all exception vectors.Adin Scannell
PiperOrigin-RevId: 200144655 Change-Id: I5a753c74b75007b7714d6fe34aa0d2e845dc5c41
2018-06-08Fix kernel flags handling and add missing vectors.Adin Scannell
PiperOrigin-RevId: 199877174 Change-Id: I9d19ea301608c2b989df0a6123abb1e779427853
2018-06-06Ensure guest-mode for page table modifications.Adin Scannell
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
2018-06-06Split PCID implementation from page tables.Adin Scannell
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
2018-06-06Add allocator abstraction for page tables.Adin Scannell
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
2018-06-01Move page tables lock into the address space.Adin Scannell
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
2018-05-30Restore FS on resume.Adin Scannell
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
2018-05-30Change ring0 & page tables arguments to structs.Adin Scannell
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
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