xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ARM: KVM: Allow host virt timer irq to be different from guest timer virt irq

Browse Source 
The arch_timer irq numbers (or PPI numbers) are implementation dependent,
so the host virtual timer irq number can be different from guest virtual
timer irq number.

This patch ensures that host virtual timer irq number is read from DTB and
guest virtual timer irq is determined based on vcpu target type.

Signed-off-by: Anup Patel <anup.patel@linaro.org>
Signed-off-by: Pranavkumar Sawargaonkar <pranavkumar@linaro.org>
Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
This commit is contained in:
Anup Patel
2013-04-30 12:02:15 +05:30
committed by Christoffer Dall
parent 87d41fb4da
commit 5ae7f87a56
3 changed files with 36 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
arch/arm/kvm/reset.c
View File

@@ -27,6 +27,8 @@
#include <asm/kvm_arm.h>
#include <asm/kvm_coproc.h>
#include <kvm/arm_arch_timer.h>
/******************************************************************************
* Cortex-A15 Reset Values
*/
@@ -37,6 +39,11 @@ static struct kvm_regs a15_regs_reset = {
.usr_regs.ARM_cpsr = SVC_MODE | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT,
};
static const struct kvm_irq_level a15_vtimer_irq = {
.irq = 27,
.level = 1,
};
/*******************************************************************************
* Exported reset function
@@ -52,6 +59,7 @@ static struct kvm_regs a15_regs_reset = {
int kvm_reset_vcpu(struct kvm_vcpu *vcpu)
{
struct kvm_regs *cpu_reset;
const struct kvm_irq_level *cpu_vtimer_irq;
switch (vcpu->arch.target) {
case KVM_ARM_TARGET_CORTEX_A15:
@@ -59,6 +67,7 @@ int kvm_reset_vcpu(struct kvm_vcpu *vcpu)
return -EINVAL;
cpu_reset = &a15_regs_reset;
vcpu->arch.midr = read_cpuid_id();
cpu_vtimer_irq = &a15_vtimer_irq;
break;
default:
return -ENODEV;
@@ -70,5 +79,8 @@ int kvm_reset_vcpu(struct kvm_vcpu *vcpu)
/* Reset CP15 registers */
kvm_reset_coprocs(vcpu);
/* Reset arch_timer context */
kvm_timer_vcpu_reset(vcpu, cpu_vtimer_irq);
return 0;
}