On 29/09/19 03:57, Tao Xu wrote:
> +} else if (function == 7 && index == 0 && reg == R_ECX) {
> +if (enable_cpu_pm) {
> +ret |= CPUID_7_0_ECX_WAITPKG;
This is incorrect. You should disable WAITPKG if !enable_cpu_pm, but
you should not enable it forcefully if enable_cpu_pm
On 10/9/2019 4:06 PM, Paolo Bonzini wrote:
On 29/09/19 03:57, Tao Xu wrote:
+} else if (function == 7 && index == 0 && reg == R_ECX) {
+if (enable_cpu_pm) {
+ret |= CPUID_7_0_ECX_WAITPKG;
This is incorrect. You should disable WAITPKG if !enable_cpu_pm, but
you should n
UMONITOR, UMWAIT and TPAUSE are a set of user wait instructions.
This patch adds support for user wait instructions in KVM. Availability
of the user wait instructions is indicated by the presence of the CPUID
feature flag WAITPKG CPUID.0x07.0x0:ECX[5]. User wait instructions may
be executed at any
