timer-sr.c File Reference

#include <clocksource/arm_arch_timer.h>
#include <linux/compiler.h>
#include <linux/kvm_host.h>
#include <asm/kvm_hyp.h>
#include <asm/kvm_mmu.h>

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Functions
void	__kvm_timer_set_cntvoff (u64 cntvoff)
void	__timer_disable_traps (struct kvm_vcpu *vcpu)
void	__timer_enable_traps (struct kvm_vcpu *vcpu)

Function Documentation

__kvm_timer_set_cntvoff()

void __kvm_timer_set_cntvoff

(

u64

cntvoff

)

Definition at line 14 of file timer-sr.c.

{
    write_sysreg(cntvoff, cntvoff_el2);
}

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__timer_disable_traps()

void __timer_disable_traps

(

struct kvm_vcpu *

vcpu

)

Definition at line 23 of file timer-sr.c.

{
    u64 val, shift = 0;
 
    if (has_hvhe())
        shift = 10;
 
    /* Allow physical timer/counter access for the host */
    val = read_sysreg(cnthctl_el2);
    val |= (CNTHCTL_EL1PCTEN | CNTHCTL_EL1PCEN) << shift;
    write_sysreg(val, cnthctl_el2);
}

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__timer_enable_traps()

void __timer_enable_traps

(

struct kvm_vcpu *

vcpu

)

Definition at line 40 of file timer-sr.c.

{
    u64 clr = 0, set = 0;
 
    /*
     * Disallow physical timer access for the guest
     * Physical counter access is allowed if no offset is enforced
     * or running protected (we don't offset anything in this case).
     */
    clr = CNTHCTL_EL1PCEN;
    if (is_protected_kvm_enabled() ||
        !kern_hyp_va(vcpu->kvm)->arch.timer_data.poffset)
        set |= CNTHCTL_EL1PCTEN;
    else
        clr |= CNTHCTL_EL1PCTEN;
 
    if (has_hvhe()) {
        clr <<= 10;
        set <<= 10;
    }
 
    sysreg_clear_set(cnthctl_el2, clr, set);
}

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