| Age | Commit message (Collapse) | Author |
|---|
|
Alexei Starovoitov says:
====================
v7->v8:
- moved 'u32 num_args' from 'struct tracepoint' into 'struct bpf_raw_event_map'
that increases memory overhead, but can be optimized/compressed later.
Now it's zero changes in tracepoint.[ch]
v6->v7:
- adopted Steven's bpf_raw_tp_map section approach to find tracepoint
and corresponding bpf probe function instead of kallsyms approach.
dropped kernel_tracepoint_find_by_name() patch
v5->v6:
- avoid changing semantics of for_each_kernel_tracepoint() function, instead
introduce kernel_tracepoint_find_by_name() helper
v4->v5:
- adopted Daniel's fancy REPEAT macro in bpf_trace.c in patch 6
v3->v4:
- adopted Linus's CAST_TO_U64 macro to cast any integer, pointer, or small
struct to u64. That nicely reduced the size of patch 1
v2->v3:
- with Linus's suggestion introduced generic COUNT_ARGS and CONCATENATE macros
(or rather moved them from apparmor)
that cleaned up patch 6
- added patch 4 to refactor trace_iwlwifi_dev_ucode_error() from 17 args to 4
Now any tracepoint with >12 args will have build error
v1->v2:
- simplified api by combing bpf_raw_tp_open(name) + bpf_attach(prog_fd) into
bpf_raw_tp_open(name, prog_fd) as suggested by Daniel.
That simplifies bpf_detach as well which is now simple close() of fd.
- fixed memory leak in error path which was spotted by Daniel.
- fixed bpf_get_stackid(), bpf_perf_event_output() called from raw tracepoints
- added more tests
- fixed allyesconfig build caught by buildbot
v1:
This patch set is a different way to address the pressing need to access
task_struct pointers in sched tracepoints from bpf programs.
The first approach simply added these pointers to sched tracepoints:
https://lkml.org/lkml/2017/12/14/753
which Peter nacked.
Few options were discussed and eventually the discussion converged on
doing bpf specific tracepoint_probe_register() probe functions.
Details here:
https://lkml.org/lkml/2017/12/20/929
Patch 1 is kernel wide cleanup of pass-struct-by-value into
pass-struct-by-reference into tracepoints.
Patches 2 and 3 are minor cleanups to address allyesconfig build
Patch 4 refactor trace_iwlwifi_dev_ucode_error from 17 to 4 args
Patch 5 introduces COUNT_ARGS macro
Patch 6 introduces BPF_RAW_TRACEPOINT api.
the auto-cleanup and multiple concurrent users are must have
features of tracing api. For bpf raw tracepoints it looks like:
// load bpf prog with BPF_PROG_TYPE_RAW_TRACEPOINT type
prog_fd = bpf_prog_load(...);
// receive anon_inode fd for given bpf_raw_tracepoint
// and attach bpf program to it
raw_tp_fd = bpf_raw_tracepoint_open("xdp_exception", prog_fd);
Ctrl-C of tracing daemon or cmdline tool will automatically
detach bpf program, unload it and unregister tracepoint probe.
More details in patch 6.
Patch 7 - trivial support in libbpf
Patches 8, 9 - user space tests
samples/bpf/test_overhead performance on 1 cpu:
tracepoint base kprobe+bpf tracepoint+bpf raw_tracepoint+bpf
task_rename 1.1M 769K 947K 1.0M
urandom_read 789K 697K 750K 755K
====================
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
|
|
similar to traditional traceopint test add bpf_get_stackid() test
from raw tracepoints
and reduce verbosity of existing stackmap test
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
|
|
add empty raw_tracepoint bpf program to test overhead similar
to kprobe and traditional tracepoint tests
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
|
|
add bpf_raw_tracepoint_open(const char *name, int prog_fd) api to libbpf
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
|
|
Introduce BPF_PROG_TYPE_RAW_TRACEPOINT bpf program type to access
kernel internal arguments of the tracepoints in their raw form.
>From bpf program point of view the access to the arguments look like:
struct bpf_raw_tracepoint_args {
__u64 args[0];
};
int bpf_prog(struct bpf_raw_tracepoint_args *ctx)
{
// program can read args[N] where N depends on tracepoint
// and statically verified at program load+attach time
}
kprobe+bpf infrastructure allows programs access function arguments.
This feature allows programs access raw tracepoint arguments.
Similar to proposed 'dynamic ftrace events' there are no abi guarantees
to what the tracepoints arguments are and what their meaning is.
The program needs to type cast args properly and use bpf_probe_read()
helper to access struct fields when argument is a pointer.
For every tracepoint __bpf_trace_##call function is prepared.
In assembler it looks like:
(gdb) disassemble __bpf_trace_xdp_exception
Dump of assembler code for function __bpf_trace_xdp_exception:
0xffffffff81132080 <+0>: mov %ecx,%ecx
0xffffffff81132082 <+2>: jmpq 0xffffffff811231f0 <bpf_trace_run3>
where
TRACE_EVENT(xdp_exception,
TP_PROTO(const struct net_device *dev,
const struct bpf_prog *xdp, u32 act),
The above assembler snippet is casting 32-bit 'act' field into 'u64'
to pass into bpf_trace_run3(), while 'dev' and 'xdp' args are passed as-is.
All of ~500 of __bpf_trace_*() functions are only 5-10 byte long
and in total this approach adds 7k bytes to .text.
This approach gives the lowest possible overhead
while calling trace_xdp_exception() from kernel C code and
transitioning into bpf land.
Since tracepoint+bpf are used at speeds of 1M+ events per second
this is valuable optimization.
The new BPF_RAW_TRACEPOINT_OPEN sys_bpf command is introduced
that returns anon_inode FD of 'bpf-raw-tracepoint' object.
The user space looks like:
// load bpf prog with BPF_PROG_TYPE_RAW_TRACEPOINT type
prog_fd = bpf_prog_load(...);
// receive anon_inode fd for given bpf_raw_tracepoint with prog attached
raw_tp_fd = bpf_raw_tracepoint_open("xdp_exception", prog_fd);
Ctrl-C of tracing daemon or cmdline tool that uses this feature
will automatically detach bpf program, unload it and
unregister tracepoint probe.
On the kernel side the __bpf_raw_tp_map section of pointers to
tracepoint definition and to __bpf_trace_*() probe function is used
to find a tracepoint with "xdp_exception" name and
corresponding __bpf_trace_xdp_exception() probe function
which are passed to tracepoint_probe_register() to connect probe
with tracepoint.
Addition of bpf_raw_tracepoint doesn't interfere with ftrace and perf
tracepoint mechanisms. perf_event_open() can be used in parallel
on the same tracepoint.
Multiple bpf_raw_tracepoint_open("xdp_exception", prog_fd) are permitted.
Each with its own bpf program. The kernel will execute
all tracepoint probes and all attached bpf programs.
In the future bpf_raw_tracepoints can be extended with
query/introspection logic.
__bpf_raw_tp_map section logic was contributed by Steven Rostedt
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
|
|
move COUNT_ARGS() macro from apparmor to generic header and extend it
to count till twelve.
COUNT() was an alternative name for this logic, but it's used for
different purpose in many other places.
Similarly for CONCATENATE() macro.
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
|
|
fix iwlwifi_dev_ucode_error tracepoint to pass pointer to a table
instead of all 17 arguments by value.
dvm/main.c and mvm/utils.c have 'struct iwl_error_event_table'
defined with very similar yet subtly different fields and offsets.
tracepoint is still common and using definition of 'struct iwl_error_event_table'
from dvm/commands.h while copying fields.
Long term this tracepoint probably should be split into two.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
|
|
two trace events defined with the same name and both unused.
They conflict in allyesconfig build. Rename one of them.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
|
|
two trace events defined with the same name and both unused.
They conflict in allyesconfig build. Rename one of them.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
|
|
- fix trace_hfi1_ctxt_info() to pass large struct by reference instead of by value
- convert 'type array[]' tracepoint arguments into 'type *array',
since compiler will warn that sizeof('type array[]') == sizeof('type *array')
and later should be used instead
The CAST_TO_U64 macro in the later patch will enforce that tracepoint
arguments can only be integers, pointers, or less than 8 byte structures.
Larger structures should be passed by reference.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
|
|
nested_run_pending
When vCPU runs L2 and there is a pending event that requires to exit
from L2 to L1 and nested_run_pending=1, vcpu_enter_guest() will request
an immediate-exit from L2 (See req_immediate_exit).
Since now handling of req_immediate_exit also makes sure to set
KVM_REQ_EVENT, there is no need to also set it on vmx_vcpu_run() when
nested_run_pending=1.
This optimizes cases where VMRESUME was executed by L1 to enter L2 and
there is no pending events that require exit from L2 to L1. Previously,
this would have set KVM_REQ_EVENT unnecessarly.
Signed-off-by: Liran Alon <liran.alon@oracle.com>
Reviewed-by: Nikita Leshenko <nikita.leshchenko@oracle.com>
Reviewed-by: Krish Sadhukhan <krish.sadhukhan@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
|
|
pending
In case L2 VMExit to L0 during event-delivery, VMCS02 is filled with
IDT-vectoring-info which vmx_complete_interrupts() makes sure to
reinject before next resume of L2.
While handling the VMExit in L0, an IPI could be sent by another L1 vCPU
to the L1 vCPU which currently runs L2 and exited to L0.
When L0 will reach vcpu_enter_guest() and call inject_pending_event(),
it will note that a previous event was re-injected to L2 (by
IDT-vectoring-info) and therefore won't check if there are pending L1
events which require exit from L2 to L1. Thus, L0 enters L2 without
immediate VMExit even though there are pending L1 events!
This commit fixes the issue by making sure to check for L1 pending
events even if a previous event was reinjected to L2 and bailing out
from inject_pending_event() before evaluating a new pending event in
case an event was already reinjected.
The bug was observed by the following setup:
* L0 is a 64CPU machine which runs KVM.
* L1 is a 16CPU machine which runs KVM.
* L0 & L1 runs with APICv disabled.
(Also reproduced with APICv enabled but easier to analyze below info
with APICv disabled)
* L1 runs a 16CPU L2 Windows Server 2012 R2 guest.
During L2 boot, L1 hangs completely and analyzing the hang reveals that
one L1 vCPU is holding KVM's mmu_lock and is waiting forever on an IPI
that he has sent for another L1 vCPU. And all other L1 vCPUs are
currently attempting to grab mmu_lock. Therefore, all L1 vCPUs are stuck
forever (as L1 runs with kernel-preemption disabled).
Observing /sys/kernel/debug/tracing/trace_pipe reveals the following
series of events:
(1) qemu-system-x86-19066 [030] kvm_nested_vmexit: rip:
0xfffff802c5dca82f reason: EPT_VIOLATION ext_inf1: 0x0000000000000182
ext_inf2: 0x00000000800000d2 ext_int: 0x00000000 ext_int_err: 0x00000000
(2) qemu-system-x86-19054 [028] kvm_apic_accept_irq: apicid f
vec 252 (Fixed|edge)
(3) qemu-system-x86-19066 [030] kvm_inj_virq: irq 210
(4) qemu-system-x86-19066 [030] kvm_entry: vcpu 15
(5) qemu-system-x86-19066 [030] kvm_exit: reason EPT_VIOLATION
rip 0xffffe00069202690 info 83 0
(6) qemu-system-x86-19066 [030] kvm_nested_vmexit: rip:
0xffffe00069202690 reason: EPT_VIOLATION ext_inf1: 0x0000000000000083
ext_inf2: 0x0000000000000000 ext_int: 0x00000000 ext_int_err: 0x00000000
(7) qemu-system-x86-19066 [030] kvm_nested_vmexit_inject: reason:
EPT_VIOLATION ext_inf1: 0x0000000000000083 ext_inf2: 0x0000000000000000
ext_int: 0x00000000 ext_int_err: 0x00000000
(8) qemu-system-x86-19066 [030] kvm_entry: vcpu 15
Which can be analyzed as follows:
(1) L2 VMExit to L0 on EPT_VIOLATION during delivery of vector 0xd2.
Therefore, vmx_complete_interrupts() will set KVM_REQ_EVENT and reinject
a pending-interrupt of 0xd2.
(2) L1 sends an IPI of vector 0xfc (CALL_FUNCTION_VECTOR) to destination
vCPU 15. This will set relevant bit in LAPIC's IRR and set KVM_REQ_EVENT.
(3) L0 reach vcpu_enter_guest() which calls inject_pending_event() which
notes that interrupt 0xd2 was reinjected and therefore calls
vmx_inject_irq() and returns. Without checking for pending L1 events!
Note that at this point, KVM_REQ_EVENT was cleared by vcpu_enter_guest()
before calling inject_pending_event().
(4) L0 resumes L2 without immediate-exit even though there is a pending
L1 event (The IPI pending in LAPIC's IRR).
We have already reached the buggy scenario but events could be
furthered analyzed:
(5+6) L2 VMExit to L0 on EPT_VIOLATION. This time not during
event-delivery.
(7) L0 decides to forward the VMExit to L1 for further handling.
(8) L0 resumes into L1. Note that because KVM_REQ_EVENT is cleared, the
LAPIC's IRR is not examined and therefore the IPI is still not delivered
into L1!
Signed-off-by: Liran Alon <liran.alon@oracle.com>
Reviewed-by: Nikita Leshenko <nikita.leshchenko@oracle.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
|
|
The reason that exception.pending should block re-injection of
NMI/interrupt is not described correctly in comment in code.
Instead, it describes why a pending exception should be injected
before a pending NMI/interrupt.
Therefore, move currently present comment to code-block evaluating
a new pending event which explains why exception.pending is evaluated
first.
In addition, create a new comment describing that exception.pending
blocks re-injection of NMI/interrupt because the exception was
queued by handling vmexit which was due to NMI/interrupt delivery.
Signed-off-by: Liran Alon <liran.alon@oracle.com>
Reviewed-by: Nikita Leshenko <nikita.leshchenko@oracle.com>
Signed-off-by: Krish Sadhukhan <krish.sadhukhan@orcle.com>
[Used a comment from Sean J <sean.j.christopherson@intel.com>. - Radim]
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
|
|
For exceptions & NMIs events, KVM code use the following
coding convention:
*) "pending" represents an event that should be injected to guest at
some point but it's side-effects have not yet occurred.
*) "injected" represents an event that it's side-effects have already
occurred.
However, interrupts don't conform to this coding convention.
All current code flows mark interrupt.pending when it's side-effects
have already taken place (For example, bit moved from LAPIC IRR to
ISR). Therefore, it makes sense to just rename
interrupt.pending to interrupt.injected.
This change follows logic of previous commit 664f8e26b00c ("KVM: X86:
Fix loss of exception which has not yet been injected") which changed
exception to follow this coding convention as well.
It is important to note that in case !lapic_in_kernel(vcpu),
interrupt.pending usage was and still incorrect.
In this case, interrrupt.pending can only be set using one of the
following ioctls: KVM_INTERRUPT, KVM_SET_VCPU_EVENTS and
KVM_SET_SREGS. Looking at how QEMU uses these ioctls, one can see that
QEMU uses them either to re-set an "interrupt.pending" state it has
received from KVM (via KVM_GET_VCPU_EVENTS interrupt.pending or
via KVM_GET_SREGS interrupt_bitmap) or by dispatching a new interrupt
from QEMU's emulated LAPIC which reset bit in IRR and set bit in ISR
before sending ioctl to KVM. So it seems that indeed "interrupt.pending"
in this case is also suppose to represent "interrupt.injected".
However, kvm_cpu_has_interrupt() & kvm_cpu_has_injectable_intr()
is misusing (now named) interrupt.injected in order to return if
there is a pending interrupt.
This leads to nVMX/nSVM not be able to distinguish if it should exit
from L2 to L1 on EXTERNAL_INTERRUPT on pending interrupt or should
re-inject an injected interrupt.
Therefore, add a FIXME at these functions for handling this issue.
This patch introduce no semantics change.
Signed-off-by: Liran Alon <liran.alon@oracle.com>
Reviewed-by: Nikita Leshenko <nikita.leshchenko@oracle.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Krish Sadhukhan <krish.sadhukhan@oracle.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
|
|
kvm_inject_realmode_interrupt() is called from one of the injection
functions which writes event-injection to VMCS: vmx_queue_exception(),
vmx_inject_irq() and vmx_inject_nmi().
All these functions are called just to cause an event-injection to
guest. They are not responsible of manipulating the event-pending
flag. The only purpose of kvm_inject_realmode_interrupt() should be
to emulate real-mode interrupt-injection.
This was also incorrect when called from vmx_queue_exception().
Signed-off-by: Liran Alon <liran.alon@oracle.com>
Reviewed-by: Nikita Leshenko <nikita.leshchenko@oracle.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Krish Sadhukhan <krish.sadhukhan@oracle.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
|
|
Enlightened VMCS is just a structure in memory, the main benefit
besides avoiding somewhat slower VMREAD/VMWRITE is using clean field
mask: we tell the underlying hypervisor which fields were modified
since VMEXIT so there's no need to inspect them all.
Tight CPUID loop test shows significant speedup:
Before: 18890 cycles
After: 8304 cycles
Static key is being used to avoid performance penalty for non-Hyper-V
deployments.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
|
|
TLFS 5.0 says: "Support for an enlightened VMCS interface is reported with
CPUID leaf 0x40000004. If an enlightened VMCS interface is supported,
additional nested enlightenments may be discovered by reading the CPUID
leaf 0x4000000A (see 2.4.11)."
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
|
|
The definitions are according to the Hyper-V TLFS v5.0. KVM on Hyper-V will
use these.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
|
|
Virtual Processor Assist Pages usage allows us to do optimized EOI
processing for APIC, enable Enlightened VMCS support in KVM and more.
struct hv_vp_assist_page is defined according to the Hyper-V TLFS v5.0b.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
|
|
The assist page has been used only for the paravirtual EOI so far, hence
the "APIC" in the MSR name. Renaming to match the Hyper-V TLFS where it's
called "Virtual VP Assist MSR".
Signed-off-by: Ladi Prosek <lprosek@redhat.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
|
|
mshyperv.h now only contains fucntions/variables we define in kernel, all
definitions from TLFS should go to hyperv-tlfs.h.
'enum hv_cpuid_function' is removed as we already have this info in
hyperv-tlfs.h, code in mshyperv.c is adjusted accordingly.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
|
|
hyperv.h is not part of uapi, there are no (known) users outside of kernel.
We are making changes to this file to match current Hyper-V Hypervisor
Top-Level Functional Specification (TLFS, see:
https://docs.microsoft.com/en-us/virtualization/hyper-v-on-windows/reference/tlfs)
and we don't want to maintain backwards compatibility.
Move the file renaming to hyperv-tlfs.h to avoid confusing it with
mshyperv.h. In future, all definitions from TLFS should go to it and
all kernel objects should go to mshyperv.h or include/linux/hyperv.h.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
|
|
Add missing entries to the index and ensure the entries are in
alphabetical order. Also amd-memory-encryption.rst is an .rst
not a .txt.
Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
|
|
static_key_disable_cpuslocked(): static key 'virt_spin_lock_key+0x0/0x20' used before call to jump_label_init()
WARNING: CPU: 0 PID: 0 at kernel/jump_label.c:161 static_key_disable_cpuslocked+0x61/0x80
RIP: 0010:static_key_disable_cpuslocked+0x61/0x80
Call Trace:
static_key_disable+0x16/0x20
start_kernel+0x192/0x4b3
secondary_startup_64+0xa5/0xb0
Qspinlock will be choosed when dedicated pCPUs are available, however, the
static virt_spin_lock_key is set in kvm_spinlock_init() before jump_label_init()
has been called, which will result in a WARN(). This patch fixes it by delaying
the virt_spin_lock_key setup to .smp_prepare_cpus().
Reported-by: Davidlohr Bueso <dbueso@suse.de>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Fixes: b2798ba0b876 ("KVM: X86: Choose qspinlock when dedicated physical CPUs are available")
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
|
|
Unused since added in 18e8f4100
Signed-off-by: Cole Robinson <crobinso@redhat.com>
Reviewed-and-tested-by: Stefan Raspl <stefan.raspl@linux.vnet.ibm.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
|
|
$ python3 tools/kvm/kvm_stat/kvm_stat
Traceback (most recent call last):
File "tools/kvm/kvm_stat/kvm_stat", line 1668, in <module>
main()
File "tools/kvm/kvm_stat/kvm_stat", line 1639, in main
assign_globals()
File "tools/kvm/kvm_stat/kvm_stat", line 1618, in assign_globals
for line in file('/proc/mounts'):
NameError: name 'file' is not defined
open() is the python3 way, and works on python2.6+
Signed-off-by: Cole Robinson <crobinso@redhat.com>
Reviewed-and-tested-by: Stefan Raspl <stefan.raspl@linux.vnet.ibm.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
|
|
$ python3 tools/kvm/kvm_stat/kvm_stat
File "tools/kvm/kvm_stat/kvm_stat", line 1137
def sortkey((_k, v)):
^
SyntaxError: invalid syntax
Fix it in a way that's compatible with python2 and python3
Signed-off-by: Cole Robinson <crobinso@redhat.com>
Tested-by: Stefan Raspl <stefan.raspl@linux.vnet.ibm.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
|
|
Bring the PLE(pause loop exit) logic to AMD svm driver.
While testing, we found this helping in situations where numerous
pauses are generated. Without these patches we could see continuos
VMEXITS due to pause interceptions. Tested it on AMD EPYC server with
boot parameter idle=poll on a VM with 32 vcpus to simulate extensive
pause behaviour. Here are VMEXITS in 10 seconds interval.
Pauses 810199 504
Total 882184 325415
Signed-off-by: Babu Moger <babu.moger@amd.com>
[Prevented the window from dropping below the initial value. - Radim]
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
|
|
This patch adds the support for pause filtering threshold. This feature
support is indicated by CPUID Fn8000_000A_EDX. See AMD APM Vol 2 Section
15.14.4 Pause Intercept Filtering for more details.
In this mode, a 16-bit pause filter threshold field is added in VMCB.
The threshold value is a cycle count that is used to reset the pause
counter. As with simple pause filtering, VMRUN loads the pause count
value from VMCB into an internal counter. Then, on each pause instruction
the hardware checks the elapsed number of cycles since the most recent
pause instruction against the pause Filter Threshold. If the elapsed cycle
count is greater than the pause filter threshold, then the internal pause
count is reloaded from VMCB and execution continues. If the elapsed cycle
count is less than the pause filter threshold, then the internal pause
count is decremented. If the count value is less than zero and pause
intercept is enabled, a #VMEXIT is triggered. If advanced pause filtering
is supported and pause filter threshold field is set to zero, the filter
will operate in the simpler, count only mode.
Signed-off-by: Babu Moger <babu.moger@amd.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
|
|
This patch brings some of the code from vmx to x86.h header file. Now, we
can share this code between vmx and svm. Modified couple functions to make
it common.
Signed-off-by: Babu Moger <babu.moger@amd.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
|
|
Get rid of ple_window_actual_max, because its benefits are really
minuscule and the logic is complicated.
The overflows(and underflow) are controlled in __ple_window_grow
and _ple_window_shrink respectively.
Suggested-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Babu Moger <babu.moger@amd.com>
[Fixed potential wraparound and change the max to UINT_MAX. - Radim]
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
|
|
The vmx module parameters are supposed to be unsigned variants.
Also fixed the checkpatch errors like the one below.
WARNING: Symbolic permissions 'S_IRUGO' are not preferred. Consider using octal permissions '0444'.
+module_param(ple_gap, uint, S_IRUGO);
Signed-off-by: Babu Moger <babu.moger@amd.com>
[Expanded uint to unsigned int in code. - Radim]
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
|
|
Cortex-R8 has identical initialisation requirements to Cortex-R7, so
hook it up in proc-v7.S in the same way.
Signed-off-by: Luca Scalabrino <luca.scalabrino@arm.com>
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
|
|
CONFIG_FORTIFY_SOURCE detects various overflows at compile-time.
(6974f0c4555e ("include/linux/string.h:
add the option of fortified string.h functions)
ARCH_HAS_FORTIFY_SOURCE means that the architecture can be built and
run with CONFIG_FORTIFY_SOURCE.
Since ARM can be built and run with that flag like other architectures,
select ARCH_HAS_FORTIFY_SOURCE as default.
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Jinbum Park <jinb.park7@gmail.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
|
|
Reserve an F2FS feature flag and inode flag for fs-verity. This is an
in-development feature that is planned be discussed at LSF/MM 2018 [1].
It will provide file-based integrity and authenticity for read-only
files. Most code will be in a filesystem-independent module, with
smaller changes needed to individual filesystems that opt-in to
supporting the feature. An early prototype supporting F2FS is available
[2]. Reserving the F2FS on-disk bits for fs-verity will prevent users
of the prototype from conflicting with other new F2FS features.
Note that we're reserving the inode flag in f2fs_inode.i_advise, which
isn't really appropriate since it's not a hint or advice. But
->i_advise is already being used to hold the 'encrypt' flag; and F2FS's
->i_flags uses the generic FS_* values, so it seems ->i_flags can't be
used for an F2FS-specific flag without additional work to remove the
assumption that ->i_flags uses the generic flags namespace.
[1] https://marc.info/?l=linux-fsdevel&m=151690752225644
[2] https://git.kernel.org/pub/scm/linux/kernel/git/mhalcrow/linux.git/log/?h=fs-verity-dev
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
|
|
We can set triggers that cause a debug data collection when something
of interest happens (e.g. when too many probes are lost conscutively).
Normally, this triggers don't cause the FW to be restarted, but in
some cases that may be desired, so we recover from the problem. To
support this, add a flag that indicates that the FW should be
restarted when the trigger fires.
Signed-off-by: Shahar S Matityahu <shahar.s.matityahu@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
|
|
Currently we have a boolean variable for each cause.
This costs space, and requires to check each separately
when determining low latency.
Since we have another cause incoming, convert it to an enum.
While at it, move the retrieval of the prev value and the
assignment of the new value to be inside iwl_mvm_update_low_latency
and save the need for each caller to do it separately.
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
|
|
We are now ready to load 38.ucode
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
|
|
Some geographic profiles require specific handling. For example ETSI
profile requires special channel access handling. Add geographic
profile information to MCC_UPDATE response to allow it.
Signed-off-by: Haim Dreyfuss <haim.dreyfuss@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
|
|
A lot of new PCI IDs were added for the 9000 series. Add them to the
list of supported PCI IDs.
Cc: stable@vger.kernel.org # 4.13+
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
|
|
Remove fragmented_dwell_time and add num_of_fragments to support
the new API version.
Signed-off-by: Ayala Beker <ayala.beker@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
|
|
The FW does not allocate quota air time for the binding of a station
MAC before iwlmvm indicates that it is associated. Currently iwlmvm
indicates that the MAC is associated only after hearing a beacon from
the AP. In case a deauthentication frame is sent before the MAC is
associated, the frame might not be sent as the corresponding binding
is not scheduled.
To handle such cases, set IEEE80211_HW_DEAUTH_NEED_MGD_TX_PREP in the
HW flags, requesting mac80211 to call the mgd_prepare_tx() callback
before transmitting a deauthentication frame if associated but no
beacon was heard from the AP.
In addition, do not warn in iwl_mvm_mac_mgd_prepare_tx() when already
associated as now the callback can be called also when associated.
Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
|
|
Add support for Optimized Connectivity Experience (OCE). Get
capabilities from the fw, expose them with nl80211, and enable them in
UMAC scan if the relevant nl80211 flags are set by the userspace.
Signed-off-by: Roee Zamir <roee.zamir@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
|
|
Update the scan command API with support for adaptive dwell. Adaptive
dwell is a type of scan that dynamically changes the time it remains
on each channel listening for beacons or probe responses.
Signed-off-by: Roee Zamir <roee.zamir@intel.com>
Signed-off-by: Beni Lev <beni.lev@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
|
|
Sample usage for tos ...
bpf_getsockopt(skops, SOL_IP, IP_TOS, &v, sizeof(v))
... where skops is a pointer to the ctx (struct bpf_sock_ops).
Signed-off-by: Nikita V. Shirokov <tehnerd@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
|
|
This reverts commit 4b1e84276a6172980c5bf39aa091ba13e90d6dad.
Software uses the valid bits to decide if the values can be used for
further processing or other actions. So setting the valid bits will have
software act on values that it shouldn't be acting on.
The recommendation to save all the register values does not mean that
the values are always valid.
Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: tony.luck@intel.com
Cc: Yazen Ghannam <Yazen.Ghannam@amd.com>
Cc: bp@suse.de
Cc: linux-edac@vger.kernel.org
Link: https://lkml.kernel.org/r/20180326191526.64314-1-Yazen.Ghannam@amd.com
|
|
Stephen Rothewell <sfr@canb.auug.org.au> wrote:
> After merging the userns tree, today's linux-next build (powerpc
> ppc64_defconfig) produced this warning:
>
> In file included from include/linux/sched.h:16:0,
> from arch/powerpc/lib/xor_vmx_glue.c:14:
> include/linux/shm.h:17:35: error: 'struct file' declared inside parameter list will not be visible outside of this definition or declaration [-Werror]
> bool is_file_shm_hugepages(struct file *file);
> ^~~~
>
> and many, many more (most warnings, but some errors - arch/powerpc is
> mostly built with -Werror)
I dug through this and I discovered that the error was caused by the
removal of struct shmid_kernel from shm.h when building on powerpc.
Except for observing the existence of "struct file *shm_file" in
struct shmid_kernel I have no clue why the structure move would cause
such a failure. I suspect shm.h always needed the forward declaration
and someting had been confusing gcc into not issuing the warning. --EWB
Fixes: a2e102cd3cdd ("shm: Move struct shmid_kernel into ipc/shm.c")
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
|
|
A critical error was found testing the fixed UV4 HUB in that an MMR address
was found to be incorrect. This causes the virtual address space for
accessing the MMIOH1 region to be allocated with the incorrect size.
Fixes: 673aa20c55a1 ("x86/platform/UV: Update uv_mmrs.h to prepare for UV4A fixes")
Signed-off-by: Mike Travis <travis@sgi.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Dimitri Sivanich <dimitri.sivanich@hpe.com>
Cc: Russ Anderson <russ.anderson@hpe.com>
Cc: Andrew Banman <andrew.banman@hpe.com>
Link: https://lkml.kernel.org/r/20180328174011.041801248@stormcage.americas.sgi.com
|
|
ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into next/dt
Pull "i.MX device tree updates for 4.17, round 2" Shawn Guo:
- Add missing property '#sound-dai-cells' for sgtl5000 codec node
in imx6ul-isiot board to fix warning seen with DTC 1.4.6.
- Use stdout-path instead of linux,stdout-path to fix DTC warning
reported by DTC 1.4.6.
* tag 'imx-dt-4.17-2' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
ARM: dts: imx6ul-isiot: Pass the required '#sound-dai-cells'
ARM: dts: imx6-phytec: Use the standard 'stdout-path' property
|
|
The Trace Hub devices now can be enumerated as ACPI devices, which
translates into "Host Debugger mode". There are two IDs: one for
PCH Trace Hub, and one for the uncore Trace Hub. These are expected
to stay the same across all platforms.
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
|
