linux-kernel - [PATCH RFC 3/4] KVM: MIPS: Replace all the kvm_flush_remote

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Date:   Fri,  7 Feb 2020 17:35:19 -0500
From:   Peter Xu <peterx@...hat.com>
To:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:     Sean Christopherson <sean.j.christopherson@...el.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        linux-mips@...r.kernel.org, peterx@...hat.com,
        Vitaly Kuznetsov <vkuznets@...hat.com>
Subject: [PATCH RFC 3/4] KVM: MIPS: Replace all the kvm_flush_remote_tlbs() references

Replace kvm_flush_remote_tlbs() calls in MIPS code into
kvm_flush_remote_tlbs_common().  This is to prepare that MIPS will
define its own kvm_flush_remote_tlbs() soon.

The only three references are all in the flush_shadow_all() hooks.
One of them can be directly dropped because it's exactly the
kvm_flush_remote_tlbs_common().  Since at it, refactors the other one
a bit.

No functional change expected.

Signed-off-by: Peter Xu <peterx@...hat.com>
---
 arch/mips/kvm/trap_emul.c | 8 +-------
 arch/mips/kvm/vz.c        | 7 ++-----
 2 files changed, 3 insertions(+), 12 deletions(-)

diff --git a/arch/mips/kvm/trap_emul.c b/arch/mips/kvm/trap_emul.c
index 2ecb430ea0f1..ced481c963be 100644
--- a/arch/mips/kvm/trap_emul.c
+++ b/arch/mips/kvm/trap_emul.c
@@ -697,12 +697,6 @@ static int kvm_trap_emul_vcpu_setup(struct kvm_vcpu *vcpu)
 	return 0;
 }
 
-static void kvm_trap_emul_flush_shadow_all(struct kvm *kvm)
-{
-	/* Flush GVA page tables and invalidate GVA ASIDs on all VCPUs */
-	kvm_flush_remote_tlbs(kvm);
-}
-
 static u64 kvm_trap_emul_get_one_regs[] = {
 	KVM_REG_MIPS_CP0_INDEX,
 	KVM_REG_MIPS_CP0_ENTRYLO0,
@@ -1285,7 +1279,7 @@ static struct kvm_mips_callbacks kvm_trap_emul_callbacks = {
 	.vcpu_init = kvm_trap_emul_vcpu_init,
 	.vcpu_uninit = kvm_trap_emul_vcpu_uninit,
 	.vcpu_setup = kvm_trap_emul_vcpu_setup,
-	.flush_shadow_all = kvm_trap_emul_flush_shadow_all,
+	.flush_shadow_all = kvm_flush_remote_tlbs_common,
 	.gva_to_gpa = kvm_trap_emul_gva_to_gpa_cb,
 	.queue_timer_int = kvm_mips_queue_timer_int_cb,
 	.dequeue_timer_int = kvm_mips_dequeue_timer_int_cb,
diff --git a/arch/mips/kvm/vz.c b/arch/mips/kvm/vz.c
index 814bd1564a79..91fbf6710da4 100644
--- a/arch/mips/kvm/vz.c
+++ b/arch/mips/kvm/vz.c
@@ -3105,10 +3105,7 @@ static int kvm_vz_vcpu_setup(struct kvm_vcpu *vcpu)
 
 static void kvm_vz_flush_shadow_all(struct kvm *kvm)
 {
-	if (cpu_has_guestid) {
-		/* Flush GuestID for each VCPU individually */
-		kvm_flush_remote_tlbs(kvm);
-	} else {
+	if (!cpu_has_guestid) {
 		/*
 		 * For each CPU there is a single GPA ASID used by all VCPUs in
 		 * the VM, so it doesn't make sense for the VCPUs to handle
@@ -3119,8 +3116,8 @@ static void kvm_vz_flush_shadow_all(struct kvm *kvm)
 		 * kick any running VCPUs so they check asid_flush_mask.
 		 */
 		cpumask_setall(&kvm->arch.asid_flush_mask);
-		kvm_flush_remote_tlbs(kvm);
 	}
+	kvm_flush_remote_tlbs_common(kvm);
 }
 
 static void kvm_vz_vcpu_reenter(struct kvm_run *run, struct kvm_vcpu *vcpu)
-- 
2.24.1