Commit Graph

3 Commits

Author SHA1 Message Date
Geoffroy Van Cutsem
8b16be9185 Remove "All rights reserved" string headers
Many of the license and Intel copyright headers include the "All rights
reserved" string. It is not relevant in the context of the BSD-3-Clause
license that the code is released under. This patch removes those strings
throughout the code (hypervisor, devicemodel and misc).

Tracked-On: #7254
Signed-off-by: Geoffroy Van Cutsem <geoffroy.vancutsem@intel.com>
2022-04-06 13:21:02 +08:00
Shuo A Liu
3fffa68665 hv: Support WAITPKG instructions in guest VM
TPAUSE, UMONITOR or UMWAIT instructions execution in guest VM cause
a #UD if "enable user wait and pause" (bit 26) of VMX_PROCBASED_CTLS2
is not set. To fix this issue, set the bit 26 of VMX_PROCBASED_CTLS2.

Besides, these WAITPKG instructions uses MSR_IA32_UMWAIT_CONTROL. So
load corresponding vMSR value during context switch in of a vCPU.

Please note, the TPAUSE or UMWAIT instruction causes a VM exit if the
"RDTSC exiting" and "enable user wait and pause" are both 1. In ACRN
hypervisor, "RDTSC exiting" is always 0. So TPAUSE or UMWAIT doesn't
cause a VM exit.

Performance impact:
    MSR_IA32_UMWAIT_CONTROL read costs ~19 cycles;
    MSR_IA32_UMWAIT_CONTROL write costs ~63 cycles.

Tracked-On: #6006
Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com>
2021-05-13 14:19:50 +08:00
Liang Yi
688a41c290 hv: mod: do not use explicit arch name when including headers
Instead of "#include <x86/foo.h>", use "#include <asm/foo.h>".

In other words, we are adopting the same practice in Linux kernel.

Tracked-On: #5920
Signed-off-by: Liang Yi <yi.liang@intel.com>
Reviewed-by: Jason Chen CJ <jason.cj.chen@intel.com>
2021-05-08 11:15:46 +08:00