diff mbox series

[2/4] KVM: x86: hyper-v: Drop redundant 'ex' parameter from kvm_hv_flush_tlb()

Message ID 20220222154642.684285-3-vkuznets@redhat.com (mailing list archive)
State New, archived
Headers show
Series KVM: x86: hyper-v: XMM fast hypercalls fixes | expand

Commit Message

Vitaly Kuznetsov Feb. 22, 2022, 3:46 p.m. UTC 
'struct kvm_hv_hcall' has all the required information already,
there's no need to pass 'ex' additionally.

No functional change intended.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
 arch/x86/kvm/hyperv.c | 23 ++++++-----------------
 1 file changed, 6 insertions(+), 17 deletions(-)

Comments

Maxim Levitsky Feb. 25, 2022, 6:22 p.m. UTC | #1 
On Tue, 2022-02-22 at 16:46 +0100, Vitaly Kuznetsov wrote:
> 'struct kvm_hv_hcall' has all the required information already,
> there's no need to pass 'ex' additionally.
> 
> No functional change intended.
> 
> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
> ---
>  arch/x86/kvm/hyperv.c | 23 ++++++-----------------
>  1 file changed, 6 insertions(+), 17 deletions(-)
> 
> diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
> index 15b6a7bd2346..714af3b94f31 100644
> --- a/arch/x86/kvm/hyperv.c
> +++ b/arch/x86/kvm/hyperv.c
> @@ -1750,7 +1750,7 @@ struct kvm_hv_hcall {
>  	sse128_t xmm[HV_HYPERCALL_MAX_XMM_REGISTERS];
>  };
>  
> -static u64 kvm_hv_flush_tlb(struct kvm_vcpu *vcpu, struct kvm_hv_hcall *hc, bool ex)
> +static u64 kvm_hv_flush_tlb(struct kvm_vcpu *vcpu, struct kvm_hv_hcall *hc)
>  {
>  	int i;
>  	gpa_t gpa;
> @@ -1765,7 +1765,8 @@ static u64 kvm_hv_flush_tlb(struct kvm_vcpu *vcpu, struct kvm_hv_hcall *hc, bool
>  	int sparse_banks_len;
>  	bool all_cpus;
>  
> -	if (!ex) {
> +	if (hc->code == HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST ||
> +	    hc->code == HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE) {
>  		if (hc->fast) {
>  			flush.address_space = hc->ingpa;
>  			flush.flags = hc->outgpa;
> @@ -2247,32 +2248,20 @@ int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
>  				kvm_hv_hypercall_complete_userspace;
>  		return 0;
>  	case HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST:
> -		if (unlikely(!hc.rep_cnt || hc.rep_idx)) {
> -			ret = HV_STATUS_INVALID_HYPERCALL_INPUT;
> -			break;
> -		}
> -		ret = kvm_hv_flush_tlb(vcpu, &hc, false);
> -		break;
> -	case HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE:
> -		if (unlikely(hc.rep)) {
> -			ret = HV_STATUS_INVALID_HYPERCALL_INPUT;
> -			break;
> -		}
> -		ret = kvm_hv_flush_tlb(vcpu, &hc, false);
> -		break;
>  	case HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX:
>  		if (unlikely(!hc.rep_cnt || hc.rep_idx)) {
>  			ret = HV_STATUS_INVALID_HYPERCALL_INPUT;
>  			break;
>  		}
> -		ret = kvm_hv_flush_tlb(vcpu, &hc, true);
> +		ret = kvm_hv_flush_tlb(vcpu, &hc);
>  		break;
> +	case HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE:
>  	case HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX:
>  		if (unlikely(hc.rep)) {
>  			ret = HV_STATUS_INVALID_HYPERCALL_INPUT;
>  			break;
>  		}
> -		ret = kvm_hv_flush_tlb(vcpu, &hc, true);
> +		ret = kvm_hv_flush_tlb(vcpu, &hc);
>  		break;
>  	case HVCALL_SEND_IPI:
>  		if (unlikely(hc.rep)) {


Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>

Best regards,
	Maxim Levitsky
Siddharth Chandrasekaran Feb. 28, 2022, 10:46 a.m. UTC | #2 
On Tue, Feb 22, 2022 at 04:46:40PM +0100, Vitaly Kuznetsov wrote:
> CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you can confirm the sender and know the content is safe.
> 
> 
> 
> 'struct kvm_hv_hcall' has all the required information already,
> there's no need to pass 'ex' additionally.
> 
> No functional change intended.
> 
> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>

Reviewed-by: Siddharth Chandrasekaran <sidcha@amazon.de>



Amazon Development Center Germany GmbH
Krausenstr. 38
10117 Berlin
Geschaeftsfuehrung: Christian Schlaeger, Jonathan Weiss
Eingetragen am Amtsgericht Charlottenburg unter HRB 149173 B
Sitz: Berlin
Ust-ID: DE 289 237 879
diff mbox series

Patch

diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index 15b6a7bd2346..714af3b94f31 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -1750,7 +1750,7 @@  struct kvm_hv_hcall {
 	sse128_t xmm[HV_HYPERCALL_MAX_XMM_REGISTERS];
 };
 
-static u64 kvm_hv_flush_tlb(struct kvm_vcpu *vcpu, struct kvm_hv_hcall *hc, bool ex)
+static u64 kvm_hv_flush_tlb(struct kvm_vcpu *vcpu, struct kvm_hv_hcall *hc)
 {
 	int i;
 	gpa_t gpa;
@@ -1765,7 +1765,8 @@  static u64 kvm_hv_flush_tlb(struct kvm_vcpu *vcpu, struct kvm_hv_hcall *hc, bool
 	int sparse_banks_len;
 	bool all_cpus;
 
-	if (!ex) {
+	if (hc->code == HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST ||
+	    hc->code == HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE) {
 		if (hc->fast) {
 			flush.address_space = hc->ingpa;
 			flush.flags = hc->outgpa;
@@ -2247,32 +2248,20 @@  int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
 				kvm_hv_hypercall_complete_userspace;
 		return 0;
 	case HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST:
-		if (unlikely(!hc.rep_cnt || hc.rep_idx)) {
-			ret = HV_STATUS_INVALID_HYPERCALL_INPUT;
-			break;
-		}
-		ret = kvm_hv_flush_tlb(vcpu, &hc, false);
-		break;
-	case HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE:
-		if (unlikely(hc.rep)) {
-			ret = HV_STATUS_INVALID_HYPERCALL_INPUT;
-			break;
-		}
-		ret = kvm_hv_flush_tlb(vcpu, &hc, false);
-		break;
 	case HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX:
 		if (unlikely(!hc.rep_cnt || hc.rep_idx)) {
 			ret = HV_STATUS_INVALID_HYPERCALL_INPUT;
 			break;
 		}
-		ret = kvm_hv_flush_tlb(vcpu, &hc, true);
+		ret = kvm_hv_flush_tlb(vcpu, &hc);
 		break;
+	case HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE:
 	case HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX:
 		if (unlikely(hc.rep)) {
 			ret = HV_STATUS_INVALID_HYPERCALL_INPUT;
 			break;
 		}
-		ret = kvm_hv_flush_tlb(vcpu, &hc, true);
+		ret = kvm_hv_flush_tlb(vcpu, &hc);
 		break;
 	case HVCALL_SEND_IPI:
 		if (unlikely(hc.rep)) {