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32d35c4a96
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Colin Ian King 32d35c4a96 perf/x86: Allow for 8<num_fixed_counters<16 
The 64 bit value read from MSR_ARCH_PERFMON_FIXED_CTR_CTRL is being
bit-wise masked with the value (0x03 << i*4). However, the shifted value
is evaluated using 32 bit arithmetic, so will UB when i > 8. Fix this
by making 0x03 a ULL so that the shift is performed using 64 bit
arithmetic.

This makes the arithmetic internally consistent and preparers for the
day when hardware provides 8<num_fixed_counters<16.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20210420142907.382417-1-colin.king@canonical.com
2021-04-23 09:03:15 +02:00
..
alpha io_uring-worker.v3-2021-02-25 2021-02-27 08:29:02 -08:00
arc arch: setup PF_IO_WORKER threads like PF_KTHREAD 2021-02-21 17:25:22 -07:00
arm A set of irqchip updates: 2021-03-14 13:33:33 -07:00
arm64 More fixes for ARM and x86. 2021-03-14 12:35:02 -07:00
csky arch/csky patches for 5.12-rc1 2021-02-28 12:06:45 -08:00
h8300 arch: setup PF_IO_WORKER threads like PF_KTHREAD 2021-02-21 17:25:22 -07:00
hexagon io_uring-worker.v3-2021-02-25 2021-02-27 08:29:02 -08:00
ia64 ia64: fix ptrace(PTRACE_SYSCALL_INFO_EXIT) sign 2021-03-13 11:27:31 -08:00
m68k signal: Introduce TRAP_PERF si_code and si_perf to siginfo 2021-04-16 16:32:41 +02:00
microblaze io_uring-worker.v3-2021-02-25 2021-02-27 08:29:02 -08:00
mips MIPS: kernel: Reserve exception base early to prevent corruption 2021-03-09 11:22:59 +01:00
nds32 io_uring-worker.v3-2021-02-25 2021-02-27 08:29:02 -08:00
nios2 io_uring-worker.v3-2021-02-25 2021-02-27 08:29:02 -08:00
openrisc io_uring-worker.v3-2021-02-25 2021-02-27 08:29:02 -08:00
parisc arch/parisc/kernel: remove duplicate include in ptrace 2021-03-04 09:12:29 +01:00
powerpc powerpc/traps: unrecoverable_exception() is not an interrupt handler 2021-03-12 11:02:12 +11:00
riscv RISC-V Patches for the 5.12 Merge Window, Part 2 2021-02-28 12:01:23 -08:00
s390 s390: remove IBM_PARTITION and CONFIGFS_FS from zfcpdump defconfig 2021-03-08 10:46:30 +01:00
sh io_uring-worker.v3-2021-02-25 2021-02-27 08:29:02 -08:00
sparc Merge git://git.kernel.org:/pub/scm/linux/kernel/git/davem/sparc 2021-03-09 17:08:41 -08:00
um io_uring-worker.v3-2021-02-25 2021-02-27 08:29:02 -08:00
x86 perf/x86: Allow for 8<num_fixed_counters<16 2021-04-23 09:03:15 +02:00
xtensa io_uring-worker.v3-2021-02-25 2021-02-27 08:29:02 -08:00
.gitignore
Kconfig kbuild: remove LLVM=1 test from HAS_LTO_CLANG 2021-03-11 14:52:55 +09:00