- 11 Aug, 2022 8 commits
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git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds authored
Pull more kvm updates from Paolo Bonzini: - Xen timer fixes - Documentation formatting fixes - Make rseq selftest compatible with glibc-2.35 - Fix handling of illegal LEA reg, reg - Cleanup creation of debugfs entries - Fix steal time cache handling bug - Fixes for MMIO caching - Optimize computation of number of LBRs - Fix uninitialized field in guest_maxphyaddr < host_maxphyaddr path * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (26 commits) KVM: x86/MMU: properly format KVM_CAP_VM_DISABLE_NX_HUGE_PAGES capability table Documentation: KVM: extend KVM_CAP_VM_DISABLE_NX_HUGE_PAGES heading underline KVM: VMX: Adjust number of LBR records for PERF_CAPABILITIES at refresh KVM: VMX: Use proper type-safe functions for vCPU => LBRs helpers KVM: x86: Refresh PMU after writes to MSR_IA32_PERF_CAPABILITIES KVM: selftests: Test all possible "invalid" PERF_CAPABILITIES.LBR_FMT vals KVM: selftests: Use getcpu() instead of sched_getcpu() in rseq_test KVM: selftests: Make rseq compatible with glibc-2.35 KVM: Actually create debugfs in kvm_create_vm() KVM: Pass the name of the VM fd to kvm_create_vm_debugfs() KVM: Get an fd before creating the VM KVM: Shove vcpu stats_id init into kvm_vcpu_init() KVM: Shove vm stats_id init into kvm_create_vm() KVM: x86/mmu: Add sanity check that MMIO SPTE mask doesn't overlap gen KVM: x86/mmu: rename trace function name for asynchronous page fault KVM: x86/xen: Stop Xen timer before changing IRQ KVM: x86/xen: Initialize Xen timer only once KVM: SVM: Disable SEV-ES support if MMIO caching is disable KVM: x86/mmu: Fully re-evaluate MMIO caching when SPTE masks change KVM: x86: Tag kvm_mmu_x86_module_init() with __init ...
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git://git.kernel.org/pub/scm/linux/kernel/git/dtor/inputLinus Torvalds authored
Pull input updates from Dmitry Torokhov: - changes to input core to properly queue synthetic events (such as autorepeat) and to release multitouch contacts when an input device is inhibited or suspended - reworked quirk handling in i8042 driver that consolidates multiple DMI tables into one and adds several quirks for TUXEDO line of laptops - update to mt6779 keypad to better reflect organization of the hardware - changes to mtk-pmic-keys driver preparing it to handle more variants - facelift of adp5588-keys driver - improvements to iqs7222 driver - adjustments to various DT binding documents for input devices - other assorted driver fixes. * tag 'input-for-v5.20-rc0' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (54 commits) Input: adc-joystick - fix ordering in adc_joystick_probe() dt-bindings: input: ariel-pwrbutton: use spi-peripheral-props.yaml Input: deactivate MT slots when inhibiting or suspending devices Input: properly queue synthetic events dt-bindings: input: iqs7222: Use central 'linux,code' definition Input: i8042 - add dritek quirk for Acer Aspire One AO532 dt-bindings: input: gpio-keys: accept also interrupt-extended dt-bindings: input: gpio-keys: reference input.yaml and document properties dt-bindings: input: gpio-keys: enforce node names to match all properties dt-bindings: input: Convert adc-keys to DT schema dt-bindings: input: Centralize 'linux,input-type' definition dt-bindings: input: Use common 'linux,keycodes' definition dt-bindings: input: Centralize 'linux,code' definition dt-bindings: input: Increase maximum keycode value to 0x2ff Input: mt6779-keypad - implement row/column selection Input: mt6779-keypad - match hardware matrix organization Input: i8042 - add additional TUXEDO devices to i8042 quirk tables Input: goodix - switch use of acpi_gpio_get_*_resource() APIs Input: i8042 - add TUXEDO devices to i8042 quirk tables Input: i8042 - add debug output for quirks ...
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Linus Torvalds authored
This reverts commit 258fafcd. The clang -Wformat warning is terminally broken, and the clang people can't seem to get their act together. This test program causes a warning with clang: #include <stdio.h> int main(int argc, char **argv) { printf("%hhu\n", 'a'); } resulting in t.c:5:19: warning: format specifies type 'unsigned char' but the argument has type 'int' [-Wformat] printf("%hhu\n", 'a'); ~~~~ ^~~ %d and apparently clang people consider that a feature, because they don't want to face the reality of how either C character constants, C arithmetic, and C varargs functions work. The rest of the world just shakes their head at that kind of incompetence, and turns off -Wformat for clang again. And no, the "you should use a pointless cast to shut this up" is not a valid answer. That warning should not exist in the first place, or at least be optinal with some "-Wformat-me-harder" kind of option. [ Admittedly, there's also very little reason to *ever* use '%hh[ud]' in C, but what little reason there is is entirely about 'I want to see only the low 8 bits of the argument'. So I would suggest nobody ever use that format in the first place, but if they do, the clang behavious is simply always wrong. Because '%hhu' takes an 'int'. It's that simple. ] Reported-by:
Sudip Mukherjee (Codethink) <sudipm.mukherjee@gmail.com> Cc: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Bagas Sanjaya authored
There is unexpected warning on KVM_CAP_VM_DISABLE_NX_HUGE_PAGES capability table, which cause the table to be rendered as paragraph text instead. The warning is due to missing colon at capability name and returns keyword, as well as improper alignment on multi-line returns field. Fix the warning by adding missing colons and aligning the field. Link: https://lore.kernel.org/lkml/20220627181937.3be67263@canb.auug.org.au/ Fixes: 084cc29f ("KVM: x86/MMU: Allow NX huge pages to be disabled on a per-vm basis") Reported-by:
Stephen Rothwell <sfr@canb.auug.org.au> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: David Matlack <dmatlack@google.com> Cc: Ben Gardon <bgardon@google.com> Cc: Peter Xu <peterx@redhat.com> Cc: kvm@vger.kernel.org Cc: linux-next@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by:
Bagas Sanjaya <bagasdotme@gmail.com> Message-Id: <20220627095151.19339-3-bagasdotme@gmail.com> Signed-off-by:
Paolo Bonzini <pbonzini@redhat.com>
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Bagas Sanjaya authored
Extend heading underline for KVM_CAP_VM_DISABLE_NX_HUGE_PAGE to match the heading text length. Link: https://lore.kernel.org/lkml/20220627181937.3be67263@canb.auug.org.au/ Fixes: 084cc29f ("KVM: x86/MMU: Allow NX huge pages to be disabled on a per-vm basis") Reported-by:
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Nick Desaulniers authored
Users of GNU ld (BFD) from binutils 2.39+ will observe multiple instances of a new warning when linking kernels in the form: ld: warning: arch/x86/boot/pmjump.o: missing .note.GNU-stack section implies executable stack ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker ld: warning: arch/x86/boot/compressed/vmlinux has a LOAD segment with RWX permissions Generally, we would like to avoid the stack being executable. Because there could be a need for the stack to be executable, assembler sources have to opt-in to this security feature via explicit creation of the .note.GNU-stack feature (which compilers create by default) or command line flag --noexecstack. Or we can simply tell the linker the production of such sections is irrelevant and to link the stack as --noexecstack. LLVM's LLD linker defaults to -z noexecstack, so this flag isn't strictly necessary when linking with LLD, only BFD, but it doesn't hurt to be explicit here for all linkers IMO. --no-warn-rwx-segments is currently BFD specific and only available in the current latest release, so it's wrapped in an ld-option check. While the kernel makes extensive usage of ELF sections, it doesn't use permissions from ELF segments. Link: https://lore.kernel.org/linux-block/3af4127a-f453-4cf7-f133-a181cce06f73@kernel.dk/ Link: https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=ba951afb99912da01a6e8434126b8fac7aa75107 Link: https://github.com/llvm/llvm-project/issues/57009Reported-and-tested-by:
Jens Axboe <axboe@kernel.dk> Suggested-by:
Fangrui Song <maskray@google.com> Signed-off-by:
Nick Desaulniers <ndesaulniers@google.com> Signed-off-by:
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Nick Desaulniers authored
Users of GNU ld (BFD) from binutils 2.39+ will observe multiple instances of a new warning when linking kernels in the form: ld: warning: vmlinux: missing .note.GNU-stack section implies executable stack ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker ld: warning: vmlinux has a LOAD segment with RWX permissions Generally, we would like to avoid the stack being executable. Because there could be a need for the stack to be executable, assembler sources have to opt-in to this security feature via explicit creation of the .note.GNU-stack feature (which compilers create by default) or command line flag --noexecstack. Or we can simply tell the linker the production of such sections is irrelevant and to link the stack as --noexecstack. LLVM's LLD linker defaults to -z noexecstack, so this flag isn't strictly necessary when linking with LLD, only BFD, but it doesn't hurt to be explicit here for all linkers IMO. --no-warn-rwx-segments is currently BFD specific and only available in the current latest release, so it's wrapped in an ld-option check. While the kernel makes extensive usage of ELF sections, it doesn't use permissions from ELF segments. Link: https://lore.kernel.org/linux-block/3af4127a-f453-4cf7-f133-a181cce06f73@kernel.dk/ Link: https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=ba951afb99912da01a6e8434126b8fac7aa75107 Link: https://github.com/llvm/llvm-project/issues/57009Reported-and-tested-by:
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Linus Torvalds authored
It turns out that gcc-12.1 has some nasty problems with register allocation on a 32-bit x86 build for the 64-bit values used in the generic blake2b implementation, where the pattern of 64-bit rotates and xor operations ends up making gcc generate horrible code. As a result it ends up with a ridiculously large stack frame for all the spills it generates, resulting in the following build problem: crypto/blake2b_generic.c: In function ‘blake2b_compress_one_generic’: crypto/blake2b_generic.c:109:1: error: the frame size of 2640 bytes is larger than 2048 bytes [-Werror=frame-larger-than=] on the same test-case, clang ends up generating a stack frame that is just 296 bytes (and older gcc versions generate a slightly bigger one at 428 bytes - still nowhere near that almost 3kB monster stack frame of gcc-12.1). The issue is fixed both in mainline and the GCC 12 release branch [1], but current release compilers end up failing the i386 allmodconfig build due to this issue. Disable the warning for now by simply raising the frame size for this one file, just to keep this issue from having people turn off WERROR. Link: https://lore.kernel.org/all/CAHk-=wjxqgeG2op+=W9sqgsWqCYnavC+SRfVyopu9-31S6xw+Q@mail.gmail.com/ Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105930 [1] Signed-off-by:
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- 10 Aug, 2022 32 commits
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git://git.linux-nfs.org/projects/trondmy/linux-nfsLinus Torvalds authored
Pull NFS client updates from Trond Myklebust: "Highlights include: Stable fixes: - pNFS/flexfiles: Fix infinite looping when the RDMA connection errors out Bugfixes: - NFS: fix port value parsing - SUNRPC: Reinitialise the backchannel request buffers before reuse - SUNRPC: fix expiry of auth creds - NFSv4: Fix races in the legacy idmapper upcall - NFS: O_DIRECT fixes from Jeff Layton - NFSv4.1: Fix OP_SEQUENCE error handling - SUNRPC: Fix an RPC/RDMA performance regression - NFS: Fix case insensitive renames - NFSv4/pnfs: Fix a use-after-free bug in open - NFSv4.1: RECLAIM_COMPLETE must handle EACCES Features: - NFSv4.1: session trunking enhancements - NFSv4.2: READ_PLUS performance optimisations - NFS: relax the rules for rsize/wsize mount options - NFS: don't unhash dentry during unlink/rename - SUNRPC: Fail faster on bad verifier - NFS/SUNRPC: Various tracing improvements" * tag 'nfs-for-5.20-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (46 commits) NFS: Improve readpage/writepage tracing NFS: Improve O_DIRECT tracing NFS: Improve write error tracing NFS: don't unhash dentry during unlink/rename NFSv4/pnfs: Fix a use-after-free bug in open NFS: nfs_async_write_reschedule_io must not recurse into the writeback code SUNRPC: Don't reuse bvec on retransmission of the request SUNRPC: Reinitialise the backchannel request buffers before reuse NFSv4.1: RECLAIM_COMPLETE must handle EACCES NFSv4.1 probe offline transports for trunking on session creation SUNRPC create a function that probes only offline transports SUNRPC export xprt_iter_rewind function SUNRPC restructure rpc_clnt_setup_test_and_add_xprt NFSv4.1 remove xprt from xprt_switch if session trunking test fails SUNRPC create an rpc function that allows xprt removal from rpc_clnt SUNRPC enable back offline transports in trunking discovery SUNRPC create an iterator to list only OFFLINE xprts NFSv4.1 offline trunkable transports on DESTROY_SESSION SUNRPC add function to offline remove trunkable transports SUNRPC expose functions for offline remote xprt functionality ... -
Sean Christopherson authored
Now that the PMU is refreshed when MSR_IA32_PERF_CAPABILITIES is written by host userspace, zero out the number of LBR records for a vCPU during PMU refresh if PMU_CAP_LBR_FMT is not set in PERF_CAPABILITIES instead of handling the check at run-time. guest_cpuid_has() is expensive due to the linear search of guest CPUID entries, intel_pmu_lbr_is_enabled() is checked on every VM-Enter, _and_ simply enumerating the same "Model" as the host causes KVM to set the number of LBR records to a non-zero value. Signed-off-by:
Sean Christopherson <seanjc@google.com> Message-Id: <20220727233424.2968356-4-seanjc@google.com> Signed-off-by:
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Sean Christopherson authored
Turn vcpu_to_lbr_desc() and vcpu_to_lbr_records() into functions in order to provide type safety, to document exactly what they return, and to allow consuming the helpers in vmx.h. Move the definitions as necessary (the macros "reference" to_vmx() before its definition). No functional change intended. Signed-off-by:
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Sean Christopherson authored
Refresh the PMU if userspace modifies MSR_IA32_PERF_CAPABILITIES. KVM consumes the vCPU's PERF_CAPABILITIES when enumerating PEBS support, but relies on CPUID updates to refresh the PMU. I.e. KVM will do the wrong thing if userspace stuffs PERF_CAPABILITIES _after_ setting guest CPUID. Opportunistically fix a curly-brace indentation. Fixes: c59a1f10 ("KVM: x86/pmu: Add IA32_PEBS_ENABLE MSR emulation for extended PEBS") Cc: Like Xu <like.xu.linux@gmail.com> Signed-off-by:
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Sean Christopherson authored
Test all possible input values to verify that KVM rejects all values except the exact host value. Due to the LBR format affecting the core functionality of LBRs, KVM can't emulate "other" formats, so even though there are a variety of legal values, KVM should reject anything but an exact host match. Suggested-by:
Like Xu <like.xu.linux@gmail.com> Signed-off-by:
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Gavin Shan authored
sched_getcpu() is glibc dependent and it can simply return the CPU ID from the registered rseq information, as Florian Weimer pointed. In this case, it's pointless to compare the return value from sched_getcpu() and that fetched from the registered rseq information. Fix the issue by replacing sched_getcpu() with getcpu(), as Florian suggested. The comments are modified accordingly by replacing "sched_getcpu()" with "getcpu()". Reported-by:
Yihuang Yu <yihyu@redhat.com> Suggested-by:
Florian Weimer <fweimer@redhat.com> Suggested-by:
Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Suggested-by:
Gavin Shan <gshan@redhat.com> Message-Id: <20220810104114.6838-3-gshan@redhat.com> Signed-off-by:
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Gavin Shan authored
The rseq information is registered by TLS, starting from glibc-2.35. In this case, the test always fails due to syscall(__NR_rseq). For example, on RHEL9.1 where upstream glibc-2.35 features are enabled on downstream glibc-2.34, the test fails like below. # ./rseq_test ==== Test Assertion Failure ==== rseq_test.c:60: !r pid=112043 tid=112043 errno=22 - Invalid argument 1 0x0000000000401973: main at rseq_test.c:226 2 0x0000ffff84b6c79b: ?? ??:0 3 0x0000ffff84b6c86b: ?? ??:0 4 0x0000000000401b6f: _start at ??:? rseq failed, errno = 22 (Invalid argument) # rpm -aq | grep glibc-2 glibc-2.34-39.el9.aarch64 Fix the issue by using "../rseq/rseq.c" to fetch the rseq information, registred by TLS if it exists. Otherwise, we're going to register our own rseq information as before. Reported-by: -
Oliver Upton authored
Doing debugfs creation after vm creation leaves things in a quasi-initialized state for a while. This is further complicated by the fact that we tear down debugfs from kvm_destroy_vm(). Align debugfs and stats init/destroy with the vm init/destroy pattern to avoid any headaches. Note the fix for a benign mistake in error handling for calls to kvm_arch_create_vm_debugfs() rolled in. Since all implementations of the function return 0 unconditionally it isn't actually a bug at the moment. Lastly, tear down debugfs/stats data in the kvm_create_vm_debugfs() error path. Previously it was safe to assume that kvm_destroy_vm() would take out the garbage, that is no longer the case. Signed-off-by:
Oliver Upton <oupton@google.com> Message-Id: <20220720092259.3491733-6-oliver.upton@linux.dev> Signed-off-by:
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Oliver Upton authored
At the time the VM fd is used in kvm_create_vm_debugfs(), the fd has been allocated but not yet installed. It is only really useful as an identifier in strings for the VM (such as debugfs). Treat it exactly as such by passing the string name of the fd to kvm_create_vm_debugfs(), futureproofing against possible misuse of the VM fd. Suggested-by:
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Oliver Upton authored
Allocate a VM's fd at the very beginning of kvm_dev_ioctl_create_vm() so that KVM can use the fd value to generate strigns, e.g. for debugfs, when creating and initializing the VM. Signed-off-by:
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Oliver Upton authored
Initialize stats_id alongside other kvm_vcpu fields to make it more difficult to unintentionally access stats_id before it's set. No functional change intended. Signed-off-by:
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Oliver Upton authored
Initialize stats_id alongside other struct kvm fields to make it more difficult to unintentionally access stats_id before it's set. While at it, move the format string to the first line of the call and fix the indentation of the second line. No functional change intended. Signed-off-by:
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Sean Christopherson authored
Add compile-time and init-time sanity checks to ensure that the MMIO SPTE mask doesn't overlap the MMIO SPTE generation or the MMU-present bit. The generation currently avoids using bit 63, but that's as much coincidence as it is strictly necessarly. That will change in the future, as TDX support will require setting bit 63 (SUPPRESS_VE) in the mask. Explicitly carve out the bits that are allowed in the mask so that any future shuffling of SPTE bits doesn't silently break MMIO caching (KVM has broken MMIO caching more than once due to overlapping the generation with other things). Suggested-by:
Kai Huang <kai.huang@intel.com> Signed-off-by:
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Mingwei Zhang authored
Rename the tracepoint function from trace_kvm_async_pf_doublefault() to trace_kvm_async_pf_repeated_fault() to make it clear, since double fault has nothing to do with this trace function. Asynchronous Page Fault (APF) is an artifact generated by KVM when it cannot find a physical page to satisfy an EPT violation. KVM uses APF to tell the guest OS to do something else such as scheduling other guest processes to make forward progress. However, when another guest process also touches a previously APFed page, KVM halts the vCPU instead of generating a repeated APF to avoid wasting cycles. Double fault (#DF) clearly has a different meaning and a different consequence when triggered. #DF requires two nested contributory exceptions instead of two page faults faulting at the same address. A prevous bug on APF indicates that it may trigger a double fault in the guest [1] and clearly this trace function has nothing to do with it. So rename this function should be a valid choice. No functional change intended. [1] https://www.spinics.net/lists/kvm/msg214957.htmlSigned-off-by:
Mingwei Zhang <mizhang@google.com> Message-Id: <20220807052141.69186-1-mizhang@google.com> Signed-off-by:
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Coleman Dietsch authored
Stop Xen timer (if it's running) prior to changing the IRQ vector and potentially (re)starting the timer. Changing the IRQ vector while the timer is still running can result in KVM injecting a garbage event, e.g. vm_xen_inject_timer_irqs() could see a non-zero xen.timer_pending from a previous timer but inject the new xen.timer_virq. Fixes: 53639526 ("KVM: x86/xen: handle PV timers oneshot mode") Cc: stable@vger.kernel.org Link: https://syzkaller.appspot.com/bug?id=8234a9dfd3aafbf092cc5a7cd9842e3ebc45fc42 Reported-by: syzbot+e54f930ed78eb0f85281@syzkaller.appspotmail.com Signed-off-by:
Coleman Dietsch <dietschc@csp.edu> Reviewed-by:
David Woodhouse <dwmw@amazon.co.uk> Message-Id: <20220808190607.323899-3-dietschc@csp.edu> Signed-off-by:
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Coleman Dietsch authored
Add a check for existing xen timers before initializing a new one. Currently kvm_xen_init_timer() is called on every KVM_XEN_VCPU_ATTR_TYPE_TIMER, which is causing the following ODEBUG crash when vcpu->arch.xen.timer is already set. ODEBUG: init active (active state 0) object type: hrtimer hint: xen_timer_callbac0 RIP: 0010:debug_print_object+0x16e/0x250 lib/debugobjects.c:502 Call Trace: __debug_object_init debug_hrtimer_init debug_init hrtimer_init kvm_xen_init_timer kvm_xen_vcpu_set_attr kvm_arch_vcpu_ioctl kvm_vcpu_ioctl vfs_ioctl Fixes: 53639526 ("KVM: x86/xen: handle PV timers oneshot mode") Cc: stable@vger.kernel.org Link: https://syzkaller.appspot.com/bug?id=8234a9dfd3aafbf092cc5a7cd9842e3ebc45fc42 Reported-by: syzbot+e54f930ed78eb0f85281@syzkaller.appspotmail.com Signed-off-by:
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Sean Christopherson authored
Disable SEV-ES if MMIO caching is disabled as SEV-ES relies on MMIO SPTEs generating #NPF(RSVD), which are reflected by the CPU into the guest as a #VC. With SEV-ES, the untrusted host, a.k.a. KVM, doesn't have access to the guest instruction stream or register state and so can't directly emulate in response to a #NPF on an emulated MMIO GPA. Disabling MMIO caching means guest accesses to emulated MMIO ranges cause #NPF(!PRESENT), and those flavors of #NPF cause automatic VM-Exits, not #VC. Adjust KVM's MMIO masks to account for the C-bit location prior to doing SEV(-ES) setup, and document that dependency between adjusting the MMIO SPTE mask and SEV(-ES) setup. Fixes: b09763da ("KVM: x86/mmu: Add module param to disable MMIO caching (for testing)") Reported-by:
Michael Roth <michael.roth@amd.com> Tested-by:
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Sean Christopherson authored
Fully re-evaluate whether or not MMIO caching can be enabled when SPTE masks change; simply clearing enable_mmio_caching when a configuration isn't compatible with caching fails to handle the scenario where the masks are updated, e.g. by VMX for EPT or by SVM to account for the C-bit location, and toggle compatibility from false=>true. Snapshot the original module param so that re-evaluating MMIO caching preserves userspace's desire to allow caching. Use a snapshot approach so that enable_mmio_caching still reflects KVM's actual behavior. Fixes: 8b9e74bf ("KVM: x86/mmu: Use enable_mmio_caching to track if MMIO caching is enabled") Reported-by:
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Sean Christopherson authored
Mark kvm_mmu_x86_module_init() with __init, the entire reason it exists is to initialize variables when kvm.ko is loaded, i.e. it must never be called after module initialization. Fixes: 1d0e8480 ("KVM: x86/mmu: Resolve nx_huge_pages when kvm.ko is loaded") Cc: stable@vger.kernel.org Reviewed-by:
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Michal Luczaj authored
The emulator mishandles LEA with register source operand. Even though such LEA is illegal, it can be encoded and fed to CPU. In which case real hardware throws #UD. The emulator, instead, returns address of x86_emulate_ctxt._regs. This info leak hurts host's kASLR. Tell the decoder that illegal LEA is not to be emulated. Signed-off-by:
Michal Luczaj <mhal@rbox.co> Message-Id: <20220729134801.1120-1-mhal@rbox.co> Signed-off-by:
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Yu Zhang authored
kvm_fixup_and_inject_pf_error() was introduced to fixup the error code( e.g., to add RSVD flag) and inject the #PF to the guest, when guest MAXPHYADDR is smaller than the host one. When it comes to nested, L0 is expected to intercept and fix up the #PF and then inject to L2 directly if - L2.MAXPHYADDR < L0.MAXPHYADDR and - L1 has no intention to intercept L2's #PF (e.g., L2 and L1 have the same MAXPHYADDR value && L1 is using EPT for L2), instead of constructing a #PF VM Exit to L1. Currently, with PFEC_MASK and PFEC_MATCH both set to 0 in vmcs02, the interception and injection may happen on all L2 #PFs. However, failing to initialize 'fault' in kvm_fixup_and_inject_pf_error() may cause the fault.async_page_fault being NOT zeroed, and later the #PF being treated as a nested async page fault, and then being injected to L1. Instead of zeroing 'fault' at the beginning of this function, we mannually set the value of 'fault.async_page_fault', because false is the value we really expect. Fixes: 89786147 ("KVM: x86: Add helper functions for illegal GPA checking and page fault injection") Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=216178Reported-by:
Yang Lixiao <lixiao.yang@intel.com> Signed-off-by:
Yu Zhang <yu.c.zhang@linux.intel.com> Reviewed-by:
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Sean Christopherson authored
Bug the VM if retrieving the x2APIC MSR/register while processing an accelerated vAPIC trap VM-Exit fails. In theory it's impossible for the lookup to fail as hardware has already validated the register, but bugs happen, and not checking the result of kvm_lapic_msr_read() would result in consuming the uninitialized "val" if a KVM or hardware bug occurs. Fixes: 1bd9dfec ("KVM: x86: Do not block APIC write for non ICR registers") Reported-by:
Dan Carpenter <dan.carpenter@oracle.com> Cc: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Signed-off-by:
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Paolo Bonzini authored
Commit 7e2175eb ("KVM: x86: Fix recording of guest steal time / preempted status", 2021-11-11) open coded the previous call to kvm_map_gfn, but in doing so it dropped the comparison between the cached guest physical address and the one in the MSR. This cause an incorrect cache hit if the guest modifies the steal time address while the memslots remain the same. This can happen with kexec, in which case the preempted bit is written at the address used by the old kernel instead of the old one. Cc: David Woodhouse <dwmw@amazon.co.uk> Cc: stable@vger.kernel.org Fixes: 7e2175eb ("KVM: x86: Fix recording of guest steal time / preempted status") Signed-off-by:
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Paolo Bonzini authored
Commit 7e2175eb ("KVM: x86: Fix recording of guest steal time / preempted status", 2021-11-11) open coded the previous call to kvm_map_gfn, but in doing so it dropped the comparison between the cached guest physical address and the one in the MSR. This cause an incorrect cache hit if the guest modifies the steal time address while the memslots remain the same. This can happen with kexec, in which case the steal time data is written at the address used by the old kernel instead of the old one. While at it, rename the variable from gfn to gpa since it is a plain physical address and not a right-shifted one. Reported-by:
Dave Young <ruyang@redhat.com> Reported-by:
Xiaoying Yan <yiyan@redhat.com> Analyzed-by:
Dr. David Alan Gilbert <dgilbert@redhat.com> Cc: David Woodhouse <dwmw@amazon.co.uk> Cc: stable@vger.kernel.org Fixes: 7e2175eb ("KVM: x86: Fix recording of guest steal time / preempted status") Signed-off-by:
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Paolo Bonzini authored
Commit 49de12ba ("selftests: drop KSFT_KHDR_INSTALL make target") dropped from tools/testing/selftests/lib.mk the code related to KSFT_KHDR_INSTALL, but in doing so it also dropped the definition of the ARCH variable. The ARCH variable is used in several subdirectories, but kvm/ is the only one of these that was using KSFT_KHDR_INSTALL. As a result, kvm selftests cannot be built anymore: In file included from include/x86_64/vmx.h:12, from x86_64/vmx_pmu_caps_test.c:18: include/x86_64/processor.h:15:10: fatal error: asm/msr-index.h: No such file or directory 15 | #include <asm/msr-index.h> | ^~~~~~~~~~~~~~~~~ In file included from ../../../../tools/include/asm/atomic.h:6, from ../../../../tools/include/linux/atomic.h:5, from rseq_test.c:15: ../../../../tools/include/asm/../../arch/x86/include/asm/atomic.h:11:10: fatal error: asm/cmpxchg.h: No such file or directory 11 | #include <asm/cmpxchg.h> | ^~~~~~~~~~~~~~~ Fix it by including the definition that was present in lib.mk. Fixes: 49de12ba ("selftests: drop KSFT_KHDR_INSTALL make target") Cc: Guillaume Tucker <guillaume.tucker@collabora.com> Cc: Anders Roxell <anders.roxell@linaro.org> Cc: Shuah Khan <skhan@linuxfoundation.org> Cc: linux-kselftest@vger.kernel.org Signed-off-by:
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Linus Torvalds authored
Merge tag 'hwmon-fixes-for-v6.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging Pull hwmon fixes from Guenter Roeck: "Fix two regressions in nct6775 and lm90 drivers" * tag 'hwmon-fixes-for-v6.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: hwmon: (nct6775) Fix platform driver suspend regression hwmon: (lm90) Fix error return value from detect function
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git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linuxLinus Torvalds authored
Pull rpmsg fixes from Bjorn Andersson: "This fixes schema validation warnings in the Devicetree bindings for SMD and SMD RPM" * tag 'rpmsg-v5.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux: dt-bindings: soc: qcom: smd-rpm: extend example dt-bindings: soc: qcom: smd: reference SMD edge schema
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git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mmLinus Torvalds authored
Pull remaining MM updates from Andrew Morton: "Three patch series - two that perform cleanups and one feature: - hugetlb_vmemmap cleanups from Muchun Song - hardware poisoning support for 1GB hugepages, from Naoya Horiguchi - highmem documentation fixups from Fabio De Francesco" * tag 'mm-stable-2022-08-09' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (23 commits) Documentation/mm: add details about kmap_local_page() and preemption highmem: delete a sentence from kmap_local_page() kdocs Documentation/mm: rrefer kmap_local_page() and avoid kmap() Documentation/mm: avoid invalid use of addresses from kmap_local_page() Documentation/mm: don't kmap*() pages which can't come from HIGHMEM highmem: specify that kmap_local_page() is callable from interrupts highmem: remove unneeded spaces in kmap_local_page() kdocs mm, hwpoison: enable memory error handling on 1GB hugepage mm, hwpoison: skip raw hwpoison page in freeing 1GB hugepage mm, hwpoison: make __page_handle_poison returns int mm, hwpoison: set PG_hwpoison for busy hugetlb pages mm, hwpoison: make unpoison aware of raw error info in hwpoisoned hugepage mm, hwpoison, hugetlb: support saving mechanism of raw error pages mm/hugetlb: make pud_huge() and follow_huge_pud() aware of non-present pud entry mm/hugetlb: check gigantic_page_runtime_supported() in return_unused_surplus_pages() mm: hugetlb_vmemmap: use PTRS_PER_PTE instead of PMD_SIZE / PAGE_SIZE mm: hugetlb_vmemmap: move code comments to vmemmap_dedup.rst mm: hugetlb_vmemmap: improve hugetlb_vmemmap code readability mm: hugetlb_vmemmap: replace early_param() with core_param() mm: hugetlb_vmemmap: move vmemmap code related to HugeTLB to hugetlb_vmemmap.c ...
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git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxlLinus Torvalds authored
Pull cxl updates from Dan Williams: "Compute Express Link (CXL) updates for 6.0: - Introduce a 'struct cxl_region' object with support for provisioning and assembling persistent memory regions. - Introduce alloc_free_mem_region() to accompany the existing request_free_mem_region() as a method to allocate physical memory capacity out of an existing resource. - Export insert_resource_expand_to_fit() for the CXL subsystem to late-publish CXL platform windows in iomem_resource. - Add a polled mode PCI DOE (Data Object Exchange) driver service and use it in cxl_pci to retrieve the CDAT (Coherent Device Attribute Table)" * tag 'cxl-for-6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl: (74 commits) cxl/hdm: Fix skip allocations vs multiple pmem allocations cxl/region: Disallow region granularity != window granularity cxl/region: Fix x1 interleave to greater than x1 interleave routing cxl/region: Move HPA setup to cxl_region_attach() cxl/region: Fix decoder interleave programming Documentation: cxl: remove dangling kernel-doc reference cxl/region: describe targets and nr_targets members of cxl_region_params cxl/regions: add padding for cxl_rr_ep_add nested lists cxl/region: Fix IS_ERR() vs NULL check cxl/region: Fix region reference target accounting cxl/region: Fix region commit uninitialized variable warning cxl/region: Fix port setup uninitialized variable warnings cxl/region: Stop initializing interleave granularity cxl/hdm: Fix DPA reservation vs cxl_endpoint_decoder lifetime cxl/acpi: Minimize granularity for x1 interleaves cxl/region: Delete 'region' attribute from root decoders cxl/acpi: Autoload driver for 'cxl_acpi' test devices cxl/region: decrement ->nr_targets on error in cxl_region_attach() cxl/region: prevent underflow in ways_to_cxl() cxl/region: uninitialized variable in alloc_hpa() ... -
git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrlLinus Torvalds authored
Pull pin control updates from Linus Walleij: "Outside the pinctrl driver and DT bindings we hit some Arm DT files, patched by the maintainers. Other than that it is business as usual. Core changes: - Add PINCTRL_PINGROUP() helper macro (and use it in the AMD driver). New drivers: - Intel Meteor Lake support. - Reneasas RZ/V2M and r8a779g0 (R-Car V4H). - AXP209 variants AXP221, AXP223 and AXP809. - Qualcomm MSM8909, PM8226, PMP8074 and SM6375. - Allwinner D1. Improvements: - Proper pin multiplexing in the AMD driver. - Mediatek MT8192 can use generic drive strength and pin bias, then fixes on top plus some I2C pin group fixes. - Have the Allwinner Sunplus SP7021 use the generic DT schema and make interrupts optional. - Handle Qualcomm SC7280 ADSP. - Handle Qualcomm MSM8916 CAMSS GP clock muxing. - High impedance bias on ZynqMP. - Serialize StarFive access to MMIO. - Immutable gpiochip for BCM2835, Ingenic, Qualcomm SPMI GPIO" * tag 'pinctrl-v6.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (117 commits) dt-bindings: pinctrl: qcom,pmic-gpio: add PM8226 constraints pinctrl: qcom: Make PINCTRL_SM8450 depend on PINCTRL_MSM pinctrl: qcom: sm8250: Fix PDC map pinctrl: amd: Fix an unused variable dt-bindings: pinctrl: mt8186: Add and use drive-strength-microamp dt-bindings: pinctrl: mt8186: Add gpio-line-names property ARM: dts: imxrt1170-pinfunc: Add pinctrl binding header pinctrl: amd: Use unicode for debugfs output pinctrl: amd: Fix newline declaration in debugfs output pinctrl: at91: Fix typo 'the the' in comment dt-bindings: pinctrl: st,stm32: Correct 'resets' property name pinctrl: mvebu: Missing a blank line after declarations. pinctrl: qcom: Add SM6375 TLMM driver dt-bindings: pinctrl: Add DT schema for SM6375 TLMM dt-bindings: pinctrl: mt8195: Use drive-strength-microamp in examples Revert "pinctrl: qcom: spmi-gpio: make the irqchip immutable" pinctrl: imx93: Add MODULE_DEVICE_TABLE() pinctrl: sunxi: Add driver for Allwinner D1 pinctrl: sunxi: Make some layout parameters dynamic pinctrl: sunxi: Refactor register/offset calculation ... -
Linus Torvalds authored
Merge tag 'apparmor-pr-2022-08-08' of git://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmor Pull AppArmor updates from John Johansen: "This is mostly cleanups and bug fixes with the one bigger change being Mathew Wilcox's patch to use XArrays instead of the IDR from the thread around the locking weirdness. Features: - Convert secid mapping to XArrays instead of IDR - Add a kernel label to use on kernel objects - Extend policydb permission set by making use of the xbits - Make export of raw binary profile to userspace optional - Enable tuning of policy paranoid load for embedded systems - Don't create raw_sha1 symlink if sha1 hashing is disabled - Allow labels to carry debug flags Cleanups: - Update MAINTAINERS file - Use struct_size() helper in kmalloc() - Move ptrace mediation to more logical task.{h,c} - Resolve uninitialized symbol warnings - Remove redundant ret variable - Mark alloc_unconfined() as static - Update help description of policy hash for introspection - Remove some casts which are no-longer required Bug Fixes: - Fix aa_label_asxprint return check - Fix reference count leak in aa_pivotroot() - Fix memleak in aa_simple_write_to_buffer() - Fix kernel doc comments - Fix absroot causing audited secids to begin with = - Fix quiet_denied for file rules - Fix failed mount permission check error message - Disable showing the mode as part of a secid to secctx - Fix setting unconfined mode on a loaded profile - Fix overlapping attachment computation - Fix undefined reference to `zlib_deflate_workspacesize'" * tag 'apparmor-pr-2022-08-08' of git://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmor: (34 commits) apparmor: Update MAINTAINERS file with new email address apparmor: correct config reference to intended one apparmor: move ptrace mediation to more logical task.{h,c} apparmor: extend policydb permission set by making use of the xbits apparmor: allow label to carry debug flags apparmor: fix overlapping attachment computation apparmor: fix setting unconfined mode on a loaded profile apparmor: Fix some kernel-doc comments apparmor: Mark alloc_unconfined() as static apparmor: disable showing the mode as part of a secid to secctx apparmor: Convert secid mapping to XArrays instead of IDR apparmor: add a kernel label to use on kernel objects apparmor: test: Remove some casts which are no-longer required apparmor: Fix memleak in aa_simple_write_to_buffer() apparmor: fix reference count leak in aa_pivotroot() apparmor: Fix some kernel-doc comments apparmor: Fix undefined reference to `zlib_deflate_workspacesize' apparmor: fix aa_label_asxprint return check apparmor: Fix some kernel-doc comments apparmor: Fix some kernel-doc comments ...
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git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuildLinus Torvalds authored
Pull Kbuild updates from Masahiro Yamada: - Remove the support for -O3 (CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3) - Fix error of rpm-pkg cross-builds - Support riscv for checkstack tool - Re-enable -Wformwat warnings for Clang - Clean up modpost, Makefiles, and misc scripts * tag 'kbuild-v5.20' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (30 commits) modpost: remove .symbol_white_list field entirely modpost: remove unneeded .symbol_white_list initializers modpost: add PATTERNS() helper macro modpost: shorten warning messages in report_sec_mismatch() Revert "Kbuild, lto, workaround: Don't warn for initcall_reference in modpost" modpost: use more reliable way to get fromsec in section_rel(a)() modpost: add array range check to sec_name() modpost: refactor get_secindex() kbuild: set EXIT trap before creating temporary directory modpost: remove unused Elf_Sword macro Makefile.extrawarn: re-enable -Wformat for clang kbuild: add dtbs_prepare target kconfig: Qt5: tell the user which packages are required modpost: use sym_get_data() to get module device_table data modpost: drop executable ELF support checkstack: add riscv support for scripts/checkstack.pl kconfig: shorten the temporary directory name for cc-option scripts: headers_install.sh: Update config leak ignore entries kbuild: error out if $(INSTALL_MOD_PATH) contains % or : kbuild: error out if $(KBUILD_EXTMOD) contains % or : ...
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