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When return on an error path, file handle need to be closed
to prevent resource leak
Signed-off-by: Ding Xiang <dingxiang@cmss.chinamobile.com>
Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
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When building selftests/dma:
$ make -C tools/testing/selftests TARGETS=dma
I hit the following compilation error:
dma_map_benchmark.c:13:10: fatal error: linux/map_benchmark.h: No such file or directory
#include <linux/map_benchmark.h>
^~~~~~~~~~~~~~~~~~~~~~~
dma/Makefile does not include the map_benchmark.h path, so add
more including path, and fix include order in dma_map_benchmark.c
Fixes: 8ddde07a3d28 ("dma-mapping: benchmark: extract a common header file for map_benchmark definition")
Signed-off-by: Yu Liao <liaoyu15@huawei.com>
Tested-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
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Cover the case when tail call count needs to be passed from BPF function to
BPF function, and the caller has data on stack. Specifically when the size
of data allocated on BPF stack is not a multiple on 8.
Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20220616162037.535469-3-jakub@cloudflare.com
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git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Jakub Kicinski:
"Mostly driver fixes.
Current release - regressions:
- Revert "net: Add a second bind table hashed by port and address",
needs more work
- amd-xgbe: use platform_irq_count(), static setup of IRQ resources
had been removed from DT core
- dts: at91: ksz9477_evb: add phy-mode to fix port/phy validation
Current release - new code bugs:
- hns3: modify the ring param print info
Previous releases - always broken:
- axienet: make the 64b addressable DMA depends on 64b architectures
- iavf: fix issue with MAC address of VF shown as zero
- ice: fix PTP TX timestamp offset calculation
- usb: ax88179_178a needs FLAG_SEND_ZLP
Misc:
- document some net.sctp.* sysctls"
* tag 'net-5.19-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (31 commits)
net: axienet: add missing error return code in axienet_probe()
Revert "net: Add a second bind table hashed by port and address"
net: ax25: Fix deadlock caused by skb_recv_datagram in ax25_recvmsg
net: usb: ax88179_178a needs FLAG_SEND_ZLP
MAINTAINERS: add include/dt-bindings/net to NETWORKING DRIVERS
ARM: dts: at91: ksz9477_evb: fix port/phy validation
net: bgmac: Fix an erroneous kfree() in bgmac_remove()
ice: Fix memory corruption in VF driver
ice: Fix queue config fail handling
ice: Sync VLAN filtering features for DVM
ice: Fix PTP TX timestamp offset calculation
mlxsw: spectrum_cnt: Reorder counter pools
docs: networking: phy: Fix a typo
amd-xgbe: Use platform_irq_count()
octeontx2-vf: Add support for adaptive interrupt coalescing
xilinx: Fix build on x86.
net: axienet: Use iowrite64 to write all 64b descriptor pointers
net: axienet: make the 64b addresable DMA depends on 64b archectures
net: hns3: fix tm port shapping of fibre port is incorrect after driver initialization
net: hns3: fix PF rss size initialization bug
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This reverts:
commit d5a42de8bdbe ("net: Add a second bind table hashed by port and address")
commit 538aaf9b2383 ("selftests: Add test for timing a bind request to a port with a populated bhash entry")
Link: https://lore.kernel.org/netdev/20220520001834.2247810-1-kuba@kernel.org/
There are a few things that need to be fixed here:
* Updating bhash2 in cases where the socket's rcv saddr changes
* Adding bhash2 hashbucket locks
Links to syzbot reports:
https://lore.kernel.org/netdev/00000000000022208805e0df247a@google.com/
https://lore.kernel.org/netdev/0000000000003f33bc05dfaf44fe@google.com/
Fixes: d5a42de8bdbe ("net: Add a second bind table hashed by port and address")
Reported-by: syzbot+015d756bbd1f8b5c8f09@syzkaller.appspotmail.com
Reported-by: syzbot+98fd2d1422063b0f8c44@syzkaller.appspotmail.com
Reported-by: syzbot+0a847a982613c6438fba@syzkaller.appspotmail.com
Signed-off-by: Joanne Koong <joannelkoong@gmail.com>
Link: https://lore.kernel.org/r/20220615193213.2419568-1-joannelkoong@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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* check that a child process is in parent's time namespace after vfork.
* check that a child process is in the target namespace after exec.
Output on success:
$ ./vfork_exec
1..1
ok 1 exec
Signed-off-by: Andrei Vagin <avagin@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220613060723.197407-2-avagin@gmail.com
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Instead of printing an error message, kvm_stat script fails when we
restrict statistics to a guest by its name and there are multiple guests
with such name:
# kvm_stat -g my_vm
Traceback (most recent call last):
File "/usr/bin/kvm_stat", line 1819, in <module>
main()
File "/usr/bin/kvm_stat", line 1779, in main
options = get_options()
File "/usr/bin/kvm_stat", line 1718, in get_options
options = argparser.parse_args()
File "/usr/lib64/python3.10/argparse.py", line 1825, in parse_args
args, argv = self.parse_known_args(args, namespace)
File "/usr/lib64/python3.10/argparse.py", line 1858, in parse_known_args
namespace, args = self._parse_known_args(args, namespace)
File "/usr/lib64/python3.10/argparse.py", line 2067, in _parse_known_args
start_index = consume_optional(start_index)
File "/usr/lib64/python3.10/argparse.py", line 2007, in consume_optional
take_action(action, args, option_string)
File "/usr/lib64/python3.10/argparse.py", line 1935, in take_action
action(self, namespace, argument_values, option_string)
File "/usr/bin/kvm_stat", line 1649, in __call__
' to specify the desired pid'.format(" ".join(pids)))
TypeError: sequence item 0: expected str instance, int found
To avoid this, it's needed to convert pids int values to strings before
pass them to join().
Signed-off-by: Dmitry Klochkov <kdmitry556@gmail.com>
Message-Id: <20220614121141.160689-1-kdmitry556@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Fix the inverted logic of the memop extension capability check.
Fixes: 97da92c0ff92 ("KVM: s390: selftests: Use TAP interface in the memop test")
Signed-off-by: Janis Schoetterl-Glausch <scgl@linux.ibm.com>
Message-Id: <20220614162635.3445019-1-scgl@linux.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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There are some parameter being removed in function but the parameter
comments still exist, so remove them.
Signed-off-by: Shaoqin Huang <shaoqin.huang@intel.com>
Message-Id: <20220614224126.211054-1-shaoqin.huang@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Commit 704c91e59fe0 ('selftests/bpf: Test "bpftool gen min_core_btf"')
added a test test_core_btfgen to test core relocation with btf
generated with 'bpftool gen min_core_btf'. Currently,
among 76 subtests, 25 are skipped.
...
#46/69 core_reloc_btfgen/enumval:OK
#46/70 core_reloc_btfgen/enumval___diff:OK
#46/71 core_reloc_btfgen/enumval___val3_missing:OK
#46/72 core_reloc_btfgen/enumval___err_missing:SKIP
#46/73 core_reloc_btfgen/enum64val:OK
#46/74 core_reloc_btfgen/enum64val___diff:OK
#46/75 core_reloc_btfgen/enum64val___val3_missing:OK
#46/76 core_reloc_btfgen/enum64val___err_missing:SKIP
...
#46 core_reloc_btfgen:SKIP
Summary: 1/51 PASSED, 25 SKIPPED, 0 FAILED
Alexei found that in the above core_reloc_btfgen/enum64val___err_missing
should not be skipped.
Currently, the core_reloc tests have some negative tests.
In Commit 704c91e59fe0, for core_reloc_btfgen, all negative tests
are skipped with the following condition
if (!test_case->btf_src_file || test_case->fails) {
test__skip();
continue;
}
This is too conservative. Negative tests do not fail
mkstemp() and run_btfgen() should not be skipped.
There are a few negative tests indeed failing run_btfgen()
and this patch added 'run_btfgen_fails' to mark these tests
so that they can be skipped for btfgen tests. With this,
we have
...
#46/69 core_reloc_btfgen/enumval:OK
#46/70 core_reloc_btfgen/enumval___diff:OK
#46/71 core_reloc_btfgen/enumval___val3_missing:OK
#46/72 core_reloc_btfgen/enumval___err_missing:OK
#46/73 core_reloc_btfgen/enum64val:OK
#46/74 core_reloc_btfgen/enum64val___diff:OK
#46/75 core_reloc_btfgen/enum64val___val3_missing:OK
#46/76 core_reloc_btfgen/enum64val___err_missing:OK
...
Summary: 1/62 PASSED, 14 SKIPPED, 0 FAILED
Totally 14 subtests are skipped instead of 25.
Reported-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/r/20220614055526.628299-1-yhs@fb.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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With latest llvm15, test_varlen failed with the following verifier log:
17: (85) call bpf_probe_read_kernel_str#115 ; R0_w=scalar(smin=-4095,smax=256)
18: (bf) r1 = r0 ; R0_w=scalar(id=1,smin=-4095,smax=256) R1_w=scalar(id=1,smin=-4095,smax=256)
19: (67) r1 <<= 32 ; R1_w=scalar(smax=1099511627776,umax=18446744069414584320,var_off=(0x0; 0xffffffff00000000),s32_min=0,s32_max=0,u32_max=)
20: (bf) r2 = r1 ; R1_w=scalar(id=2,smax=1099511627776,umax=18446744069414584320,var_off=(0x0; 0xffffffff00000000),s32_min=0,s32_max=0,u32)
21: (c7) r2 s>>= 32 ; R2=scalar(smin=-2147483648,smax=256)
; if (len >= 0) {
22: (c5) if r2 s< 0x0 goto pc+7 ; R2=scalar(umax=256,var_off=(0x0; 0x1ff))
; payload4_len1 = len;
23: (18) r2 = 0xffffc90000167418 ; R2_w=map_value(off=1048,ks=4,vs=1572,imm=0)
25: (63) *(u32 *)(r2 +0) = r0 ; R0=scalar(id=1,smin=-4095,smax=256) R2_w=map_value(off=1048,ks=4,vs=1572,imm=0)
26: (77) r1 >>= 32 ; R1_w=scalar(umax=4294967295,var_off=(0x0; 0xffffffff))
; payload += len;
27: (18) r6 = 0xffffc90000167424 ; R6_w=map_value(off=1060,ks=4,vs=1572,imm=0)
29: (0f) r6 += r1 ; R1_w=Pscalar(umax=4294967295,var_off=(0x0; 0xffffffff)) R6_w=map_value(off=1060,ks=4,vs=1572,umax=4294967295,var_off=(0)
; len = bpf_probe_read_kernel_str(payload, MAX_LEN, &buf_in2[0]);
30: (bf) r1 = r6 ; R1_w=map_value(off=1060,ks=4,vs=1572,umax=4294967295,var_off=(0x0; 0xffffffff)) R6_w=map_value(off=1060,ks=4,vs=1572,um)
31: (b7) r2 = 256 ; R2_w=256
32: (18) r3 = 0xffffc90000164100 ; R3_w=map_value(off=256,ks=4,vs=1056,imm=0)
34: (85) call bpf_probe_read_kernel_str#115
R1 unbounded memory access, make sure to bounds check any such access
processed 27 insns (limit 1000000) max_states_per_insn 0 total_states 2 peak_states 2 mark_read 1
-- END PROG LOAD LOG --
libbpf: failed to load program 'handler32_signed'
The failure is due to
20: (bf) r2 = r1 ; R1_w=scalar(id=2,smax=1099511627776,umax=18446744069414584320,var_off=(0x0; 0xffffffff00000000),s32_min=0,s32_max=0,u32)
21: (c7) r2 s>>= 32 ; R2=scalar(smin=-2147483648,smax=256)
22: (c5) if r2 s< 0x0 goto pc+7 ; R2=scalar(umax=256,var_off=(0x0; 0x1ff))
26: (77) r1 >>= 32 ; R1_w=scalar(umax=4294967295,var_off=(0x0; 0xffffffff))
29: (0f) r6 += r1 ; R1_w=Pscalar(umax=4294967295,var_off=(0x0; 0xffffffff)) R6_w=map_value(off=1060,ks=4,vs=1572,umax=4294967295,var_off=(0)
where r1 has conservative value range compared to r2 and r1 is used later.
In llvm, commit [1] triggered the above code generation and caused
verification failure.
It may take a while for llvm to address this issue. In the main time,
let us change the variable 'len' type to 'long' and adjust condition properly.
Tested with llvm14 and latest llvm15, both worked fine.
[1] https://reviews.llvm.org/D126647
Signed-off-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/r/20220613233449.2860753-1-yhs@fb.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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The function always returns 0, so we don't need to check whether the
return value is 0 or not.
This change was first introduced in commit a777e18f1bcd ("bpftool: Use
libbpf 1.0 API mode instead of RLIMIT_MEMLOCK"), but later reverted to
restore the unconditional rlimit bump in bpftool. Let's re-add it.
Co-developed-by: Yafang Shao <laoar.shao@gmail.com>
Signed-off-by: Quentin Monnet <quentin@isovalent.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20220610112648.29695-3-quentin@isovalent.com
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This reverts commit a777e18f1bcd32528ff5dfd10a6629b655b05eb8.
In commit a777e18f1bcd ("bpftool: Use libbpf 1.0 API mode instead of
RLIMIT_MEMLOCK"), we removed the rlimit bump in bpftool, because the
kernel has switched to memcg-based memory accounting. Thanks to the
LIBBPF_STRICT_AUTO_RLIMIT_MEMLOCK, we attempted to keep compatibility
with other systems and ask libbpf to raise the limit for us if
necessary.
How do we know if memcg-based accounting is supported? There is a probe
in libbpf to check this. But this probe currently relies on the
availability of a given BPF helper, bpf_ktime_get_coarse_ns(), which
landed in the same kernel version as the memory accounting change. This
works in the generic case, but it may fail, for example, if the helper
function has been backported to an older kernel. This has been observed
for Google Cloud's Container-Optimized OS (COS), where the helper is
available but rlimit is still in use. The probe succeeds, the rlimit is
not raised, and probing features with bpftool, for example, fails.
A patch was submitted [0] to update this probe in libbpf, based on what
the cilium/ebpf Go library does [1]. It would lower the soft rlimit to
0, attempt to load a BPF object, and reset the rlimit. But it may induce
some hard-to-debug flakiness if another process starts, or the current
application is killed, while the rlimit is reduced, and the approach was
discarded.
As a workaround to ensure that the rlimit bump does not depend on the
availability of a given helper, we restore the unconditional rlimit bump
in bpftool for now.
[0] https://lore.kernel.org/bpf/20220609143614.97837-1-quentin@isovalent.com/
[1] https://github.com/cilium/ebpf/blob/v0.9.0/rlimit/rlimit.go#L39
Signed-off-by: Quentin Monnet <quentin@isovalent.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Cc: Yafang Shao <laoar.shao@gmail.com>
Cc: Stanislav Fomichev <sdf@google.com>
Link: https://lore.kernel.org/bpf/20220610112648.29695-2-quentin@isovalent.com
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Unlike GCC clang uses a single compiler image to support multiple target
architectures meaning that we can't simply rely on CROSS_COMPILE to select
the output architecture. Instead we must pass --target to the compiler to
tell it what to output, kselftest was not doing this so cross compilation
of kselftest using clang resulted in kselftest being built for the host
architecture.
More work is required to fix tests using custom rules but this gets the
bulk of things building.
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
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Replace calls to kvm_check_cap() that treat its return as a boolean with
calls to kvm_has_cap(). Several instances of kvm_check_cap() were missed
when kvm_has_cap() was introduced.
Reported-by: Andrew Jones <drjones@redhat.com>
Fixes: 3ea9b809650b ("KVM: selftests: Add kvm_has_cap() to provide syntactic sugar")
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220613161942.1586791-5-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Remove a duplicate TEST_ASSERT() on the number of runnable vCPUs in
vm_nr_pages_required() that snuck in during a rebase gone bad.
Reported-by: Andrew Jones <drjones@redhat.com>
Fixes: 6e1d13bf3815 ("KVM: selftests: Move per-VM/per-vCPU nr pages calculation to __vm_create()")
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220613161942.1586791-4-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Replace the goofy static_assert on the size of the @vm/@vcpu parameters
with a call to a dummy helper, i.e. let the compiler naturally complain
about an incompatible type instead of homebrewing a poor replacement.
Reported-by: Andrew Jones <drjones@redhat.com>
Fixes: fcba483e8246 ("KVM: selftests: Sanity check input to ioctls() at build time")
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220613161942.1586791-3-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Add an apostrophe in a comment about it being the caller's, not callers,
responsibility to free an object.
Reported-by: Andrew Jones <drjones@redhat.com>
Fixes: 768e9a61856b ("KVM: selftests: Purge vm+vcpu_id == vcpu silliness")
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220613161942.1586791-2-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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kvm_binary_stats_test accepts two arguments, the number of vms
and number of vcpus. If these inputs are not equal then the
test would likely crash for one reason or another due to using
miscalculated indices for the vcpus array. Fix the index
expressions by swapping the use of i and j.
Signed-off-by: Andrew Jones <drjones@redhat.com>
Message-Id: <20220614081041.2571511-1-drjones@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Andrii reported a bug with the following information:
2859 if (enum64_placeholder_id == 0) {
2860 enum64_placeholder_id = btf__add_int(btf, "enum64_placeholder", 1, 0);
>>> CID 394804: Control flow issues (NO_EFFECT)
>>> This less-than-zero comparison of an unsigned value is never true. "enum64_placeholder_id < 0U".
2861 if (enum64_placeholder_id < 0)
2862 return enum64_placeholder_id;
2863 ...
Here enum64_placeholder_id declared as '__u32' so enum64_placeholder_id < 0
is always false. Declare enum64_placeholder_id as 'int' in order to capture
the potential error properly.
Fixes: f2a625889bb8 ("libbpf: Add enum64 sanitization")
Reported-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20220613054314.1251905-1-yhs@fb.com
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Pull kvm fixes from Paolo Bonzini:
"While last week's pull request contained miscellaneous fixes for x86,
this one covers other architectures, selftests changes, and a bigger
series for APIC virtualization bugs that were discovered during 5.20
development. The idea is to base 5.20 development for KVM on top of
this tag.
ARM64:
- Properly reset the SVE/SME flags on vcpu load
- Fix a vgic-v2 regression regarding accessing the pending state of a
HW interrupt from userspace (and make the code common with vgic-v3)
- Fix access to the idreg range for protected guests
- Ignore 'kvm-arm.mode=protected' when using VHE
- Return an error from kvm_arch_init_vm() on allocation failure
- A bunch of small cleanups (comments, annotations, indentation)
RISC-V:
- Typo fix in arch/riscv/kvm/vmid.c
- Remove broken reference pattern from MAINTAINERS entry
x86-64:
- Fix error in page tables with MKTME enabled
- Dirty page tracking performance test extended to running a nested
guest
- Disable APICv/AVIC in cases that it cannot implement correctly"
[ This merge also fixes a misplaced end parenthesis bug introduced in
commit 3743c2f02517 ("KVM: x86: inhibit APICv/AVIC on changes to APIC
ID or APIC base") pointed out by Sean Christopherson ]
Link: https://lore.kernel.org/all/20220610191813.371682-1-seanjc@google.com/
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (34 commits)
KVM: selftests: Restrict test region to 48-bit physical addresses when using nested
KVM: selftests: Add option to run dirty_log_perf_test vCPUs in L2
KVM: selftests: Clean up LIBKVM files in Makefile
KVM: selftests: Link selftests directly with lib object files
KVM: selftests: Drop unnecessary rule for STATIC_LIBS
KVM: selftests: Add a helper to check EPT/VPID capabilities
KVM: selftests: Move VMX_EPT_VPID_CAP_AD_BITS to vmx.h
KVM: selftests: Refactor nested_map() to specify target level
KVM: selftests: Drop stale function parameter comment for nested_map()
KVM: selftests: Add option to create 2M and 1G EPT mappings
KVM: selftests: Replace x86_page_size with PG_LEVEL_XX
KVM: x86: SVM: fix nested PAUSE filtering when L0 intercepts PAUSE
KVM: x86: SVM: drop preempt-safe wrappers for avic_vcpu_load/put
KVM: x86: disable preemption around the call to kvm_arch_vcpu_{un|}blocking
KVM: x86: disable preemption while updating apicv inhibition
KVM: x86: SVM: fix avic_kick_target_vcpus_fast
KVM: x86: SVM: remove avic's broken code that updated APIC ID
KVM: x86: inhibit APICv/AVIC on changes to APIC ID or APIC base
KVM: x86: document AVIC/APICv inhibit reasons
KVM: x86/mmu: Set memory encryption "value", not "mask", in shadow PDPTRs
...
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 MMIO stale data fixes from Thomas Gleixner:
"Yet another hw vulnerability with a software mitigation: Processor
MMIO Stale Data.
They are a class of MMIO-related weaknesses which can expose stale
data by propagating it into core fill buffers. Data which can then be
leaked using the usual speculative execution methods.
Mitigations include this set along with microcode updates and are
similar to MDS and TAA vulnerabilities: VERW now clears those buffers
too"
* tag 'x86-bugs-2022-06-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/speculation/mmio: Print SMT warning
KVM: x86/speculation: Disable Fill buffer clear within guests
x86/speculation/mmio: Reuse SRBDS mitigation for SBDS
x86/speculation/srbds: Update SRBDS mitigation selection
x86/speculation/mmio: Add sysfs reporting for Processor MMIO Stale Data
x86/speculation/mmio: Enable CPU Fill buffer clearing on idle
x86/bugs: Group MDS, TAA & Processor MMIO Stale Data mitigations
x86/speculation/mmio: Add mitigation for Processor MMIO Stale Data
x86/speculation: Add a common function for MD_CLEAR mitigation update
x86/speculation/mmio: Enumerate Processor MMIO Stale Data bug
Documentation: Add documentation for Processor MMIO Stale Data
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Print a warning if the device mode doesn't match the requested mode.
The user doesn't enter the mode in hex so it isn't obvious when
setting the mode succeeds that the mode isn't the requested mode. The
kernel logs a message, it will be more visible if the test also prints
a warning. I was testing --quad, which is unsupported, but doesn't
cause the mode request to fail.
Signed-off-by: David Fries <David@Fries.net>
Link: https://lore.kernel.org/r/YqbNnSGtWHe/GG7w@spacedout.fries.net
Signed-off-by: Mark Brown <broonie@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/crng/random
Pull random number generator fixes from Jason Donenfeld:
- A fix for a 5.19 regression for a case in which early device tree
initializes the RNG, which flips a static branch.
On most plaforms, jump labels aren't initialized until much later, so
this caused splats. On a few mailing list threads, we cooked up easy
fixes for arm64, arm32, and risc-v. But then things looked slightly
more involved for xtensa, powerpc, arc, and mips. And at that point,
when we're patching 7 architectures in a place before the console is
even available, it seems like the cost/risk just wasn't worth it.
So random.c works around it now by checking the already exported
`static_key_initialized` boolean, as though somebody already ran into
this issue in the past. I'm not super jazzed about that; it'd be
prettier to not have to complicate downstream code. But I suppose
it's practical.
- A few small code nits and adding a missing __init annotation.
- A change to the default config values to use the cpu and bootloader's
seeds for initializing the RNG earlier.
This brings them into line with what all the distros do (Fedora/RHEL,
Debian, Ubuntu, Gentoo, Arch, NixOS, Alpine, SUSE, and Void... at
least), and moreover will now give us test coverage in various test
beds that might have caught the above device tree bug earlier.
- A change to WireGuard CI's configuration to increase test coverage
around the RNG.
- A documentation comment fix to unrelated maintainerless CRC code that
I was asked to take, I guess because it has to do with polynomials
(which the RNG thankfully no longer uses).
* tag 'random-5.19-rc2-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random:
wireguard: selftests: use maximum cpu features and allow rng seeding
random: remove rng_has_arch_random()
random: credit cpu and bootloader seeds by default
random: do not use jump labels before they are initialized
random: account for arch randomness in bits
random: mark bootloader randomness code as __init
random: avoid checking crng_ready() twice in random_init()
crc-itu-t: fix typo in CRC ITU-T polynomial comment
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Add benchmark for hash_map to reproduce the worst case
that non-stop update when map's free is zero.
Just like this:
./run_bench_bpf_hashmap_full_update.sh
Setting up benchmark 'bpf-hashmap-ful-update'...
Benchmark 'bpf-hashmap-ful-update' started.
1:hash_map_full_perf 555830 events per sec
...
Signed-off-by: Feng Zhou <zhoufeng.zf@bytedance.com>
Link: https://lore.kernel.org/r/20220610023308.93798-3-zhoufeng.zf@bytedance.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Add a static assert to the KVM/VM/vCPU ioctl() helpers to verify that the
size of the argument provided matches the expected size of the IOCTL.
Because ioctl() ultimately takes a "void *", it's all too easy to pass in
garbage and not detect the error until runtime. E.g. while working on a
CPUID rework, selftests happily compiled when vcpu_set_cpuid()
unintentionally passed the cpuid() function as the parameter to ioctl()
(a local "cpuid" parameter was removed, but its use was not replaced with
"vcpu->cpuid" as intended).
Tweak a variety of benign issues that aren't compatible with the sanity
check, e.g. passing a non-pointer for ioctls().
Note, static_assert() requires a string on older versions of GCC. Feed
it an empty string to make the compiler happy.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Use the TAP-friendly ksft_exit_skip() instead of KVM's custom print_skip()
when skipping a test via __TEST_REQUIRE. KVM's "skipping test" has no
known benefit, whereas some setups rely on TAP output.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Add TEST_REQUIRE() and __TEST_REQUIRE() to replace the myriad open coded
instances of selftests exiting with KSFT_SKIP after printing an
informational message. In addition to reducing the amount of boilerplate
code in selftests, the UPPERCASE macro names make it easier to visually
identify a test's requirements.
Convert usage that erroneously uses something other than print_skip()
and/or "exits" with '0' or some other non-KSFT_SKIP value.
Intentionally drop a kvm_vm_free() in aarch64/debug-exceptions.c as part
of the conversion. All memory and file descriptors are freed on process
exit, so the explicit free is superfluous.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Add kvm_has_cap() to wrap kvm_check_cap() and return a bool for the use
cases where the caller only wants check if a capability is supported,
i.e. doesn't care about the value beyond whether or not it's non-zero.
The "check" terminology is somewhat ambiguous as the non-boolean return
suggests that '0' might mean "success", i.e. suggests that the ioctl uses
the 0/-errno pattern. Provide a wrapper instead of trying to find a new
name for the raw helper; the "check" terminology is derived from the name
of the ioctl, so using e.g. "get" isn't a clear win.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Return an 'unsigned int' instead of a signed 'int' from kvm_check_cap(),
to make it more obvious that kvm_check_cap() can never return a negative
value due to its assertion that the return is ">= 0".
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Remove DEFAULT_GUEST_PHY_PAGES and open code the magic number (with a
comment) in vm_nr_pages_required(). Exposing DEFAULT_GUEST_PHY_PAGES to
tests was a symptom of the VM creation APIs not cleanly supporting tests
that create runnable vCPUs, but can't do so immediately. Now that tests
don't have to manually compute the amount of memory needed for basic
operation, make it harder for tests to do things that should be handled
by the framework, i.e. force developers to improve the framework instead
of hacking around flaws in individual tests.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Use vm->max_gfn to compute the highest gpa in vmx_apic_access_test, and
blindly trust that the highest gfn/gpa will be well above the memory
carved out for memslot0. The existing check is beyond paranoid; KVM
doesn't support CPUs with host.MAXPHYADDR < 32, and the selftests are all
kinds of hosed if memslot0 overlaps the local xAPIC, which resides above
"lower" (below 4gb) DRAM.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Handle all memslot0 size adjustments in __vm_create(). Currently, the
adjustments reside in __vm_create_with_vcpus(), which means tests that
call vm_create() or __vm_create() directly are left to their own devices.
Some tests just pass DEFAULT_GUEST_PHY_PAGES and don't bother with any
adjustments, while others mimic the per-vCPU calculations.
For vm_create(), and thus __vm_create(), take the number of vCPUs that
will be runnable to calculate that number of per-vCPU pages needed for
memslot0. To give readers a hint that neither vm_create() nor
__vm_create() create vCPUs, name the parameter @nr_runnable_vcpus instead
of @nr_vcpus. That also gives readers a hint as to why tests that create
larger numbers of vCPUs but never actually run those vCPUs can skip
straight to the vm_create_barebones() variant.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Drop @num_percpu_pages from __vm_create_with_vcpus(), all callers pass
'0' and there's unlikely to be a test that allocates just enough memory
that it needs a per-CPU allocation, but not so much that it won't just do
its own memory management.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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All callers of __vm_create_with_vcpus() pass DEFAULT_GUEST_PHY_PAGES for
@slot_mem_pages; drop the param and just hardcode the "default" as the
base number of pages for slot0.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Drop a variety of 'struct kvm_vm' accessors that wrap a single variable
now that tests can simply reference the variable directly.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Drop vcpu_state() now that all tests reference vcpu->run directly.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Drop vcpu_get() and rename vcpu_find() to vcpu_exists() to make it that
much harder for a test to give meaning to a vCPU ID. I.e. force tests to
capture a vCPU when the vCPU is created.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Take a vCPU directly instead of a VM+vcpu pair in all vCPU-scoped helpers
and ioctls.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Require the caller of __vm_create_with_vcpus() to provide a non-NULL
array of vCPUs now that all callers do so. It's extremely unlikely a
test will have a legitimate use case for creating a VM with vCPUs without
wanting to do something with those vCPUs, and if there is such a use case,
requiring that one-off test to provide a dummy array is a minor
annoyance.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Grab the vCPU from vm_vcpu_add() directly instead of doing vcpu_get()
after the fact. This will allow removing vcpu_get() entirely.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Track vCPUs by their 'struct kvm_vcpu' object, and stop assuming that a
vCPU's ID is the same as its index when referencing a vCPU's metadata.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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In preparation for taking a vCPU pointer in vCPU-scoped functions, grab
the vCPU(s) created by __vm_vcpu_add() and use the ID from the vCPU
object instead of hardcoding the ID in ioctl() invocations.
Rename init1/init2 => init0/init1 to avoid having odd/confusing code
where vcpu0 consumes init1 and vcpu1 consumes init2.
Note, this change could easily be done when the functions are converted
in the future, and/or the vcpu{0,1} vs. init{1,2} discrepancy could be
ignored, but then there would be no opportunity to poke fun at the
1-based counting scheme.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Track the vCPU's 'struct kvm_vcpu' object in get-reg-list instead of
hardcoding '0' everywhere.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Track vCPUs by their 'struct kvm_vcpu' object in kvm_binary_stats_test,
not by their ID. The per-vCPU helpers will soon take a vCPU instead of a
VM+vcpu_id pair.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Reference vCPUs by their 'struct kvm_vcpu' object in kvm_page_table_test
instead of by their ID. This moves selftests one step closer towards
taking a 'struct kvm_vcpu *' instead of VM+vcpu_id for vCPU helpers.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Drop the @vcpuids parameter from VM creators now that there are no users.
Allowing tests to specify IDs was a gigantic mistake as it resulted in
tests with arbitrary and ultimately meaningless IDs that differed only
because the author used test X intead of test Y as the source for
copy+paste (the de facto standard way to create a KVM selftest).
Except for literally two tests, x86's set_boot_cpu_id and s390's resets,
tests do not and should not care about the vCPU ID.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Drop all vm_create_default*() helpers, the "default" naming turned out to
terrible as wasn't extensible (hard to have multiple defaults), was a lie
(half the settings were default, half weren't), and failed to capture
relationships between helpers, e.g. compared with the kernel's standard
underscores pattern.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Use vm_create_with_vcpus() in max_guest_memory_test and reference vCPUs
by their 'struct kvm_vcpu' object instead of their ID.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Use vm_create() instead of vm_create_default_with_vcpus() in
tsc_scaling_sync. The existing call doesn't create any vCPUs, and the
guest_code() entry point is set when vm_vcpu_add_default() is invoked.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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