744104654d
Currently, the kernel permits userspace VMMs to enable and use the VMX-preemption timer by allowing writes to the following VMCS fields: - VMX_GUEST_PREEMPTION_TIMER_VALUE (count) - VMX_CONTROL_PIN_EXECUTION_CONTROLS (timer enable bit) - VMX_CONTROL_EXIT_CONTROLS (save current count on context switch bit) It also forwards the timer expiry event as a VM exit. But it does not tell userspace how fast the timer will count down, making it impossible to use. This commit exposes the timer's scale via `seL4_X86_VCPU_ReadMSR`. Signed-off-by: Bill Nguyen <bill.nguyen@unsw.edu.au> |
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| arm | ||
| riscv/arch | ||
| x86/arch | ||