xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Código Issues Pull requests Ações Pacotes Projetos Versões Wiki Atividade

MIPS: KVM: Generalise fpu_inuse for other state

Ver código fonte 
Rename fpu_inuse and the related definitions to aux_inuse so it can be
used for lazy context management of other auxiliary processor state too,
such as VZ guest timer, watchpoints and performance counters.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Esse commit está contido em:
James Hogan
2016-06-14 09:40:10 +01:00
commit de Paolo Bonzini
pai 35fec26242
commit f943176a72
3 arquivos alterados com 27 adições e 27 exclusões
Baixar arquivo de patch Baixar arquivo de diferenças Expandir todos os arquivos Colapsar todos os arquivos

38
arch/mips/kvm/mips.c
Ver arquivo

@@ -1447,7 +1447,7 @@ void kvm_own_fpu(struct kvm_vcpu *vcpu)
* not to clobber the status register directly via the commpage.
*/
if (cpu_has_msa && sr & ST0_CU1 && !(sr & ST0_FR) &&
vcpu->arch.fpu_inuse & KVM_MIPS_FPU_MSA)
vcpu->arch.aux_inuse & KVM_MIPS_AUX_MSA)
kvm_lose_fpu(vcpu);
/*
@@ -1462,9 +1462,9 @@ void kvm_own_fpu(struct kvm_vcpu *vcpu)
enable_fpu_hazard();
/* If guest FPU state not active, restore it now */
if (!(vcpu->arch.fpu_inuse & KVM_MIPS_FPU_FPU)) {
if (!(vcpu->arch.aux_inuse & KVM_MIPS_AUX_FPU)) {
__kvm_restore_fpu(&vcpu->arch);
vcpu->arch.fpu_inuse |= KVM_MIPS_FPU_FPU;
vcpu->arch.aux_inuse |= KVM_MIPS_AUX_FPU;
}
preempt_enable();
@@ -1491,8 +1491,8 @@ void kvm_own_msa(struct kvm_vcpu *vcpu)
* interacts with MSA state, so play it safe and save it first.
*/
if (!(sr & ST0_FR) &&
(vcpu->arch.fpu_inuse & (KVM_MIPS_FPU_FPU |
KVM_MIPS_FPU_MSA)) == KVM_MIPS_FPU_FPU)
(vcpu->arch.aux_inuse & (KVM_MIPS_AUX_FPU |
KVM_MIPS_AUX_MSA)) == KVM_MIPS_AUX_FPU)
kvm_lose_fpu(vcpu);
change_c0_status(ST0_CU1 | ST0_FR, sr);
@@ -1506,20 +1506,20 @@ void kvm_own_msa(struct kvm_vcpu *vcpu)
set_c0_config5(MIPS_CONF5_MSAEN);
enable_fpu_hazard();
switch (vcpu->arch.fpu_inuse & (KVM_MIPS_FPU_FPU | KVM_MIPS_FPU_MSA)) {
case KVM_MIPS_FPU_FPU:
switch (vcpu->arch.aux_inuse & (KVM_MIPS_AUX_FPU | KVM_MIPS_AUX_MSA)) {
case KVM_MIPS_AUX_FPU:
/*
* Guest FPU state already loaded, only restore upper MSA state
*/
__kvm_restore_msa_upper(&vcpu->arch);
vcpu->arch.fpu_inuse |= KVM_MIPS_FPU_MSA;
vcpu->arch.aux_inuse |= KVM_MIPS_AUX_MSA;
break;
case 0:
/* Neither FPU or MSA already active, restore full MSA state */
__kvm_restore_msa(&vcpu->arch);
vcpu->arch.fpu_inuse |= KVM_MIPS_FPU_MSA;
vcpu->arch.aux_inuse |= KVM_MIPS_AUX_MSA;
if (kvm_mips_guest_has_fpu(&vcpu->arch))
vcpu->arch.fpu_inuse |= KVM_MIPS_FPU_FPU;
vcpu->arch.aux_inuse |= KVM_MIPS_AUX_FPU;
break;
default:
break;
@@ -1533,13 +1533,13 @@ void kvm_own_msa(struct kvm_vcpu *vcpu)
void kvm_drop_fpu(struct kvm_vcpu *vcpu)
{
preempt_disable();
if (cpu_has_msa && vcpu->arch.fpu_inuse & KVM_MIPS_FPU_MSA) {
if (cpu_has_msa && vcpu->arch.aux_inuse & KVM_MIPS_AUX_MSA) {
disable_msa();
vcpu->arch.fpu_inuse &= ~KVM_MIPS_FPU_MSA;
vcpu->arch.aux_inuse &= ~KVM_MIPS_AUX_MSA;
}
if (vcpu->arch.fpu_inuse & KVM_MIPS_FPU_FPU) {
if (vcpu->arch.aux_inuse & KVM_MIPS_AUX_FPU) {
clear_c0_status(ST0_CU1 | ST0_FR);
vcpu->arch.fpu_inuse &= ~KVM_MIPS_FPU_FPU;
vcpu->arch.aux_inuse &= ~KVM_MIPS_AUX_FPU;
}
preempt_enable();
}
@@ -1555,7 +1555,7 @@ void kvm_lose_fpu(struct kvm_vcpu *vcpu)
*/
preempt_disable();
if (cpu_has_msa && vcpu->arch.fpu_inuse & KVM_MIPS_FPU_MSA) {
if (cpu_has_msa && vcpu->arch.aux_inuse & KVM_MIPS_AUX_MSA) {
set_c0_config5(MIPS_CONF5_MSAEN);
enable_fpu_hazard();
@@ -1563,17 +1563,17 @@ void kvm_lose_fpu(struct kvm_vcpu *vcpu)
/* Disable MSA & FPU */
disable_msa();
if (vcpu->arch.fpu_inuse & KVM_MIPS_FPU_FPU) {
if (vcpu->arch.aux_inuse & KVM_MIPS_AUX_FPU) {
clear_c0_status(ST0_CU1 | ST0_FR);
disable_fpu_hazard();
}
vcpu->arch.fpu_inuse &= ~(KVM_MIPS_FPU_FPU | KVM_MIPS_FPU_MSA);
} else if (vcpu->arch.fpu_inuse & KVM_MIPS_FPU_FPU) {
vcpu->arch.aux_inuse &= ~(KVM_MIPS_AUX_FPU | KVM_MIPS_AUX_MSA);
} else if (vcpu->arch.aux_inuse & KVM_MIPS_AUX_FPU) {
set_c0_status(ST0_CU1);
enable_fpu_hazard();
__kvm_save_fpu(&vcpu->arch);
vcpu->arch.fpu_inuse &= ~KVM_MIPS_FPU_FPU;
vcpu->arch.aux_inuse &= ~KVM_MIPS_AUX_FPU;
/* Disable FPU */
clear_c0_status(ST0_CU1 | ST0_FR);