Pull LoongArch updates from Huacai Chen:
- Add THREAD_INFO_IN_TASK implementation
- Add build salt to the vDSO
- Add some BPF JIT inline helpers
- Update DTS for I2C clocks and clock-frequency
- Some bug fixes and other small changes
* tag 'loongarch-7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson:
selftests/bpf: Test jited inline of bpf_get_smp_processor_id() for LoongArch
selftests/bpf: Test jited inline of bpf_get_current_task() for LoongArch
selftests/bpf: Add __arch_loongarch to limit test cases for LoongArch
selftests/bpf: Add get_preempt_count() support for LoongArch
LoongArch: dts: Add i2c clocks and clock-frequency properties to LS2K2000
LoongArch: dts: Add i2c clocks and clock-frequency properties to LS2K1000
LoongArch: dts: Add i2c clocks and clock-frequency properties to LS2K0500
LoongArch: BPF: Inline bpf_get_smp_processor_id() helper
LoongArch: BPF: Inline bpf_get_current_task/_btf() helpers
LoongArch: BPF: Fix off-by-one error in tail call
LoongArch: BPF: Fix outdated tail call comments
LoongArch: Add build salt to the vDSO
LoongArch: Fix nr passing in set_direct_map_valid_noflush()
LoongArch: Fix missing dirty page tracking in {pte,pmd}_wrprotect()
LoongArch: Move struct kimage forward declaration before use
LoongArch: Report dying CPU to RCU in stop_this_cpu()
LoongArch: Add PIO for early access before ACPI PCI root register
LoongArch: Add THREAD_INFO_IN_TASK implementation
Pull arm64 fixes from Will Deacon:
"Small crop of arm64 fixes for -rc1. We've got a build fix for a new
randconfig permutation, a fix for a long-standing truncation issue
with hardware watchpoints and a KVM initialisation fix for the newly
merged remapping of the kernel data and bss sections:
- Fix randconfig build failure due to missing include of asm/insn.h
- Reject unaligned hardware watchpoints which were silently being
truncated
- Fix crash in KVM initialisation by deferring the read-only
remapping of the kernel data and bss sections"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: mm: Defer read-only remap of data/bss linear alias
arm64/hw_breakpoint: reject unaligned watchpoints that would truncate BAS
arm64: static_call: include asm/insns.h
Pull kvm fixes from Paolo Bonzini:
"s390:
- Fix S390_USER_OPEREXEC so it can now be enabled regardless of other
unrelated capabilities
- Fix handling of the _PAGE_UNUSED pte bit that could lead to guest
memory corruption in some scenarios
- A bunch of misc gmap fixes (locking, behaviour under memory
pressure)
- Fix CMMA dirty tracking
x86:
- Tidy up some WARN_ON() and BUG_ON(), replacing them with
WARN_ON_ONCE() or KVM_BUG_ON(). All of these have obviously never
triggered, or somebody would have been annoyed earlier, but still...
- Fix missing interrupt due to stale CR8 intercept
- Add a statistic that can come in handy to debug leaks as well as
the vulnerability to a class of recently-discovered issues
- Do not ask arch/x86/kernel to export
default_cpu_present_to_apicid() just for KVM"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (22 commits)
x86/apic: KVM: Use cpu_physical_id() to get APIC ID of running vCPU for AVIC
KVM: x86/mmu: Expose number of shadow MMU shadow pages as a stat
KVM: x86: Unconditionally recompute CR8 intercept on PPR update
KVM: VMX: Grab vmcs12 on CR8 interception update iff vCPU is in guest mode
KVM: x86: WARN (once) if RTC pending EOI tracking goes off the rails
KVM: x86: WARN and fail kvm_set_irq() if a PIC or I/O APIC vector is invalid
KVM: x86: Bug the VM, not the kernel, if the ISR count {under,over}flows
KVM: x86/mmu: Bug the VM, not the host kernel, if KVM write-protects upper SPTEs
KVM: x86: Replace BUG_ON() with WARN_ON_ONCE() on "bad" nested GPA translation
KVM: Replace guest-triggerable BUG_ON() in ioeventfd datamatch with get_unaligned()
KVM: s390: Return failure in case of failure in kvm_s390_set_cmma_bits()
KVM: s390: selftests: Fix cmma selftest
KVM: s390: Fix cmma dirty tracking
KVM: s390: Fix locking in kvm_s390_set_mem_control()
KVM: s390: Fix handle_{sske,pfmf} under memory pressure
KVM: s390: Fix code typo in gmap_protect_asce_top_level()
KVM: s390: Do not set special large pages dirty
KVM: s390: Fix dat_peek_cmma() overflow
s390/mm: Fix handling of _PAGE_UNUSED pte bit
KVM: s390: Fix typo in UCONTROL documentation
...
Pull gpio fixes from Bartosz Golaszewski: - fix locking context with shared GPIOs in gpio-tegra - fix IRQ domain leak in error path in gpio-davinci - fix returning a potentially uninitialized integer in gpiochip_set_multiple() - use raw spinlock in gpio-eic-sprd and gpio-sch to address locking context issues - bail out of probe() if registering the GPIO chip fails in gpio-mlxbf3 - fix varible type for storing the "ngpios" property in gpio-pisosr - fix out-of-bounds pin access in GPIO ACPI - make GPIO ACPI core only trigger interrupts on boot that are marked as ActiveBoth - fix kerneldoc in gpio-tb10x - reference the real software node of the cs5535 GPIO controller in Geode board file * tag 'gpio-fixes-for-v7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux: gpio: davinci: fix IRQ domain leak on devm_kzalloc failure gpio: tegra: do not call pinctrl for GPIO direction gpio: tb10x: fix struct tb10x_gpio kernel-doc gpiolib: initialize return value in gpiochip_set_multiple() x86/platform/geode: reference the real node of the cs5535 GPIO controller gpio: eic-sprd: use raw_spinlock_t in the irq startup path gpio: sch: use raw_spinlock_t in the irq startup path gpiolib: acpi: Prevent out-of-bounds pin access in OperationRegion handler gpiolib: acpi: Add robust bounds-checking for GPIO pin resources gpio: mlxbf3: fail probe if gpiochip registration fails gpio: pisosr: Read "ngpios" as u32 gpiolib: acpi: Only trigger ActiveBoth interrupts on boot
Add missing clocks and clock-frequency properties to i2c nodes for LS2K2000. Signed-off-by: Hongliang Wang <wanghongliang@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Add missing clocks and clock-frequency properties to i2c nodes for LS2K1000. Signed-off-by: Hongliang Wang <wanghongliang@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Add missing clocks and clock-frequency properties to i2c nodes for LS2K0500. Signed-off-by: Hongliang Wang <wanghongliang@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
The pointer to thread_info is always available in the $tp register, so
the call to bpf_get_smp_processor_id() can be inlined into a single load
instruction.
(1) Here is the sample test.c:
#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
SEC("raw_tp/sys_enter")
int test_cpuid(void *ctx)
{
return bpf_get_smp_processor_id();
}
char _license[] SEC("license") = "GPL";
(2) Here are the test steps:
sudo yum install libbpf-devel kernel-devel bpftool
clang -target bpf -O2 -c test.c -o test.o
sudo sysctl -w net.core.bpf_jit_enable=1
sudo bpftool prog show name test_cpuid
sudo rm -f /sys/fs/bpf/test_cpuid
sudo bpftool prog load test.o /sys/fs/bpf/test_cpuid
ID=$(sudo bpftool prog show pinned /sys/fs/bpf/test_cpuid | grep -oE '^[0-9]+')
sudo bpftool prog dump jited id $ID
(3) Here are the test results:
Before: 6 instructions
...
64: lu12i.w $t1, 1213
68: ori $t1, $t1, 1680
6c: lu32i.d $t1, 0
70: lu52i.d $t1, $t1, -1792
74: jirl $ra, $t1, 0
78: move $a5, $a0
...
After: 1 instruction
...
64: ld.wu $a5, $tp, 16
...
This is similar with commit 2ddec2c80b44 ("riscv, bpf: inline
bpf_get_smp_processor_id()").
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
The pointer to task_struct is always available in the $tp register, so
the calls to bpf_get_current_task() and bpf_get_current_task_btf() can
be inlined into a single move instruction.
(1) Here is the sample test.c:
#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
SEC("raw_tp/sys_enter")
long test_task(void *ctx)
{
return (long)bpf_get_current_task();
}
char _license[] SEC("license") = "GPL";
(2) Here are the test steps:
sudo yum install libbpf-devel kernel-devel bpftool
clang -target bpf -O2 -c test.c -o test.o
sudo sysctl -w net.core.bpf_jit_enable=1
sudo bpftool prog show name test_task
sudo rm -f /sys/fs/bpf/test_task
sudo bpftool prog load test.o /sys/fs/bpf/test_task
ID=$(sudo bpftool prog show pinned /sys/fs/bpf/test_task | grep -oE '^[0-9]+')
sudo bpftool prog dump jited id $ID
(3) Here are the test results:
Before: 6 instructions
...
64: lu12i.w $t1, 1093
68: ori $t1, $t1, 3320
6c: lu32i.d $t1, 0
70: lu52i.d $t1, $t1, -1792
74: jirl $ra, $t1, 0
78: move $a5, $a0
...
After: 1 instruction
...
64: move $a5, $tp
...
This is similar with commit 2bb138cb20a6 ("bpf, arm64: Inline
bpf_get_current_task/_btf() helpers").
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
The current code updates the tail call counter (TCC) using a pre-increment
approach, it stores the incremented value back to memory before performing
any boundary or target validation checks.
This causes two major issues:
1. When a tail call fails because the target program is NULL, the TCC is
incorrectly incremented and saved in memory anyway.
2. This dummy increment implicitly consumes one slot of the allowed tail
call budget. As a result, the subsequent loop reaches the maximum limit
prematurely, leading to a test failure where the actual loop count is
32 instead of the expected 33.
Fix this by deferring the counter update. Change the branch condition to
BPF_JSGE (greater or equal) so that we check the boundary first. The TCC
is only incremented and stored back to memory after the boundary check
and the NULL-target check both pass.
Before:
$ sudo ./test_progs -t tailcalls/tailcall_3
...
test_tailcall_count:FAIL:tailcall count unexpected tailcall count: actual 32 != expected 33
...
#465/3 tailcalls/tailcall_3:FAIL
#465 tailcalls:FAIL
After:
$ sudo ./test_progs -t tailcalls/tailcall_3
#465/3 tailcalls/tailcall_3:OK
#465 tailcalls:OK
Summary: 1/1 PASSED, 0 SKIPPED, 0 FAILED
Fixes: c0fcc955ff82 ("LoongArch: BPF: Fix the tailcall hierarchy")
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>