diff mbox

kvm: arm: don't treat unavailable HYP mode as an error

Message ID 20171128151819.18669-1-ard.biesheuvel@linaro.org (mailing list archive)
State New, archived
Headers show

Commit Message

Ard Biesheuvel Nov. 28, 2017, 3:18 p.m. UTC
Since it is perfectly legal to run the kernel at EL1, it is not
actually an error if HYP mode is not available when attempting to
initialize KVM, given that KVM support cannot be built as a module.
So demote the kvm_err() to kvm_info(), which prevents the error from
appearing on an otherwise 'quiet' console.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
---
 virt/kvm/arm/arm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Marc Zyngier Nov. 28, 2017, 3:26 p.m. UTC | #1
On 28/11/17 15:18, Ard Biesheuvel wrote:
> Since it is perfectly legal to run the kernel at EL1, it is not
> actually an error if HYP mode is not available when attempting to
> initialize KVM, given that KVM support cannot be built as a module.
> So demote the kvm_err() to kvm_info(), which prevents the error from
> appearing on an otherwise 'quiet' console.
> 
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
> ---
>  virt/kvm/arm/arm.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c
> index 772bf74ac2e9..988c888a9667 100644
> --- a/virt/kvm/arm/arm.c
> +++ b/virt/kvm/arm/arm.c
> @@ -1460,7 +1460,7 @@ int kvm_arch_init(void *opaque)
>  	bool in_hyp_mode;
>  
>  	if (!is_hyp_mode_available()) {
> -		kvm_err("HYP mode not available\n");
> +		kvm_info("HYP mode not available\n");
>  		return -ENODEV;
>  	}
>  
> 

Acked-by: Marc Zyngier <marc.zyngier@arm.com>

	M.
Christoffer Dall Nov. 29, 2017, 5:12 p.m. UTC | #2
On Tue, Nov 28, 2017 at 03:18:19PM +0000, Ard Biesheuvel wrote:
> Since it is perfectly legal to run the kernel at EL1, it is not
> actually an error if HYP mode is not available when attempting to
> initialize KVM, given that KVM support cannot be built as a module.
> So demote the kvm_err() to kvm_info(), which prevents the error from
> appearing on an otherwise 'quiet' console.
> 
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
> ---
>  virt/kvm/arm/arm.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c
> index 772bf74ac2e9..988c888a9667 100644
> --- a/virt/kvm/arm/arm.c
> +++ b/virt/kvm/arm/arm.c
> @@ -1460,7 +1460,7 @@ int kvm_arch_init(void *opaque)
>  	bool in_hyp_mode;
>  
>  	if (!is_hyp_mode_available()) {
> -		kvm_err("HYP mode not available\n");
> +		kvm_info("HYP mode not available\n");
>  		return -ENODEV;
>  	}
>  
> -- 
> 2.11.0
> 
Applied, thanks.
-Christoffer
diff mbox

Patch

diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c
index 772bf74ac2e9..988c888a9667 100644
--- a/virt/kvm/arm/arm.c
+++ b/virt/kvm/arm/arm.c
@@ -1460,7 +1460,7 @@  int kvm_arch_init(void *opaque)
 	bool in_hyp_mode;
 
 	if (!is_hyp_mode_available()) {
-		kvm_err("HYP mode not available\n");
+		kvm_info("HYP mode not available\n");
 		return -ENODEV;
 	}