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RDPID corresponds to a RDMSR(TSC_AUX); however, it is unprivileged so for user-mode emulation we must provide the value that the kernel places in the MSR. For Linux, it is a combination of the current CPU and the current NUMA node, both of which can be retrieved with getcpu(2). Also try sched_getcpu(), which might be there on the BSDs. If there is no portable way to retrieve the current CPU id from userspace, return 0. RDTSCP is reimplemented as RDTSC + RDPID ECX; the differences in terms of serializability are not relevant to QEMU. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
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alpha | ||
arm | ||
avr | ||
cris | ||
hexagon | ||
hppa | ||
i386 | ||
loongarch | ||
m68k | ||
microblaze | ||
mips | ||
nios2 | ||
openrisc | ||
ppc | ||
riscv | ||
rx | ||
s390x | ||
sh4 | ||
sparc | ||
tricore | ||
xtensa | ||
Kconfig | ||
meson.build |