[PATCH v2] KVM: arm64: Allow KVM to be disabled from the command line

[PATCH v2] KVM: arm64: Allow KVM to be disabled from the command line

[Marc Zyngier]

Although KVM can be compiled out of the kernel, it cannot be disabled
at runtime. Allow this possibility by introducing a new mode that
will prevent KVM from initialising.

This is useful in the (limited) circumstances where you don't want
KVM to be available (what is wrong with you?), or when you want
to install another hypervisor instead (good luck with that).

Reviewed-by: David Brazdil <dbrazdil@google.com>
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
---

Notes:
    v2: Dropped the id_aa64mmfr1_vh=0 setting so that KVM can be disabled
        and yet stay in VHE mode on platforms that require it.
        I kept the AB/RB's, but please shout if you disagree!

 Documentation/admin-guide/kernel-parameters.txt |  2 ++
 arch/arm64/include/asm/kvm_host.h               |  1 +
 arch/arm64/kvm/arm.c                            | 14 +++++++++++++-
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 91ba391f9b32..f268731a3d4d 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -2365,6 +2365,8 @@
 	kvm-arm.mode=
 			[KVM,ARM] Select one of KVM/arm64's modes of operation.
 
+			none: Forcefully disable KVM.
+
 			nvhe: Standard nVHE-based mode, without support for
 			      protected guests.
 
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index f8be56d5342b..019490c67976 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -58,6 +58,7 @@
 enum kvm_mode {
 	KVM_MODE_DEFAULT,
 	KVM_MODE_PROTECTED,
+	KVM_MODE_NONE,
 };
 enum kvm_mode kvm_get_mode(void);
 
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index fe102cd2e518..658171231af9 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -2064,6 +2064,11 @@ int kvm_arch_init(void *opaque)
 		return -ENODEV;
 	}
 
+	if (kvm_get_mode() == KVM_MODE_NONE) {
+		kvm_info("KVM disabled from command line\n");
+		return -ENODEV;
+	}
+
 	in_hyp_mode = is_kernel_in_hyp_mode();
 
 	if (cpus_have_final_cap(ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE) ||
@@ -2137,8 +2142,15 @@ static int __init early_kvm_mode_cfg(char *arg)
 		return 0;
 	}
 
-	if (strcmp(arg, "nvhe") == 0 && !WARN_ON(is_kernel_in_hyp_mode()))
+	if (strcmp(arg, "nvhe") == 0 && !WARN_ON(is_kernel_in_hyp_mode())) {
+		kvm_mode = KVM_MODE_DEFAULT;
 		return 0;
+	}
+
+	if (strcmp(arg, "none") == 0) {
+		kvm_mode = KVM_MODE_NONE;
+		return 0;
+	}
 
 	return -EINVAL;
 }
-- 
2.30.2

[PATCH v2] KVM: arm64: Allow KVM to be disabled from the command line

[Marc Zyngier]

Although KVM can be compiled out of the kernel, it cannot be disabled
at runtime. Allow this possibility by introducing a new mode that
will prevent KVM from initialising.

This is useful in the (limited) circumstances where you don't want
KVM to be available (what is wrong with you?), or when you want
to install another hypervisor instead (good luck with that).

Reviewed-by: David Brazdil <dbrazdil@google.com>
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
---

Notes:
    v2: Dropped the id_aa64mmfr1_vh=0 setting so that KVM can be disabled
        and yet stay in VHE mode on platforms that require it.
        I kept the AB/RB's, but please shout if you disagree!

 Documentation/admin-guide/kernel-parameters.txt |  2 ++
 arch/arm64/include/asm/kvm_host.h               |  1 +
 arch/arm64/kvm/arm.c                            | 14 +++++++++++++-
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 91ba391f9b32..f268731a3d4d 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -2365,6 +2365,8 @@
 	kvm-arm.mode=
 			[KVM,ARM] Select one of KVM/arm64's modes of operation.
 
+			none: Forcefully disable KVM.
+
 			nvhe: Standard nVHE-based mode, without support for
 			      protected guests.
 
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index f8be56d5342b..019490c67976 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -58,6 +58,7 @@
 enum kvm_mode {
 	KVM_MODE_DEFAULT,
 	KVM_MODE_PROTECTED,
+	KVM_MODE_NONE,
 };
 enum kvm_mode kvm_get_mode(void);
 
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index fe102cd2e518..658171231af9 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -2064,6 +2064,11 @@ int kvm_arch_init(void *opaque)
 		return -ENODEV;
 	}
 
+	if (kvm_get_mode() == KVM_MODE_NONE) {
+		kvm_info("KVM disabled from command line\n");
+		return -ENODEV;
+	}
+
 	in_hyp_mode = is_kernel_in_hyp_mode();
 
 	if (cpus_have_final_cap(ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE) ||
@@ -2137,8 +2142,15 @@ static int __init early_kvm_mode_cfg(char *arg)
 		return 0;
 	}
 
-	if (strcmp(arg, "nvhe") == 0 && !WARN_ON(is_kernel_in_hyp_mode()))
+	if (strcmp(arg, "nvhe") == 0 && !WARN_ON(is_kernel_in_hyp_mode())) {
+		kvm_mode = KVM_MODE_DEFAULT;
 		return 0;
+	}
+
+	if (strcmp(arg, "none") == 0) {
+		kvm_mode = KVM_MODE_NONE;
+		return 0;
+	}
 
 	return -EINVAL;
 }
-- 
2.30.2

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kvmarm@lists.cs.columbia.edu
https://lists.cs.columbia.edu/mailman/listinfo/kvmarm

[PATCH v2] KVM: arm64: Allow KVM to be disabled from the command line

[Marc Zyngier]

Although KVM can be compiled out of the kernel, it cannot be disabled
at runtime. Allow this possibility by introducing a new mode that
will prevent KVM from initialising.

This is useful in the (limited) circumstances where you don't want
KVM to be available (what is wrong with you?), or when you want
to install another hypervisor instead (good luck with that).

Reviewed-by: David Brazdil <dbrazdil@google.com>
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
---

Notes:
    v2: Dropped the id_aa64mmfr1_vh=0 setting so that KVM can be disabled
        and yet stay in VHE mode on platforms that require it.
        I kept the AB/RB's, but please shout if you disagree!

 Documentation/admin-guide/kernel-parameters.txt |  2 ++
 arch/arm64/include/asm/kvm_host.h               |  1 +
 arch/arm64/kvm/arm.c                            | 14 +++++++++++++-
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 91ba391f9b32..f268731a3d4d 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -2365,6 +2365,8 @@
 	kvm-arm.mode=
 			[KVM,ARM] Select one of KVM/arm64's modes of operation.
 
+			none: Forcefully disable KVM.
+
 			nvhe: Standard nVHE-based mode, without support for
 			      protected guests.
 
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index f8be56d5342b..019490c67976 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -58,6 +58,7 @@
 enum kvm_mode {
 	KVM_MODE_DEFAULT,
 	KVM_MODE_PROTECTED,
+	KVM_MODE_NONE,
 };
 enum kvm_mode kvm_get_mode(void);
 
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index fe102cd2e518..658171231af9 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -2064,6 +2064,11 @@ int kvm_arch_init(void *opaque)
 		return -ENODEV;
 	}
 
+	if (kvm_get_mode() == KVM_MODE_NONE) {
+		kvm_info("KVM disabled from command line\n");
+		return -ENODEV;
+	}
+
 	in_hyp_mode = is_kernel_in_hyp_mode();
 
 	if (cpus_have_final_cap(ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE) ||
@@ -2137,8 +2142,15 @@ static int __init early_kvm_mode_cfg(char *arg)
 		return 0;
 	}
 
-	if (strcmp(arg, "nvhe") == 0 && !WARN_ON(is_kernel_in_hyp_mode()))
+	if (strcmp(arg, "nvhe") == 0 && !WARN_ON(is_kernel_in_hyp_mode())) {
+		kvm_mode = KVM_MODE_DEFAULT;
 		return 0;
+	}
+
+	if (strcmp(arg, "none") == 0) {
+		kvm_mode = KVM_MODE_NONE;
+		return 0;
+	}
 
 	return -EINVAL;
 }
-- 
2.30.2


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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v2] KVM: arm64: Allow KVM to be disabled from the command line

[Andrew Scull]

Reviewed-by: Andrew Scull <ascull@google.com>


On Fri, 1 Oct 2021 at 18:06, Marc Zyngier <maz@kernel.org> wrote:
>
> Although KVM can be compiled out of the kernel, it cannot be disabled
> at runtime. Allow this possibility by introducing a new mode that
> will prevent KVM from initialising.
>
> This is useful in the (limited) circumstances where you don't want
> KVM to be available (what is wrong with you?), or when you want
> to install another hypervisor instead (good luck with that).
>
> Reviewed-by: David Brazdil <dbrazdil@google.com>
> Acked-by: Will Deacon <will@kernel.org>
> Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com>
> Signed-off-by: Marc Zyngier <maz@kernel.org>
> ---
>
> Notes:
>     v2: Dropped the id_aa64mmfr1_vh=0 setting so that KVM can be disabled
>         and yet stay in VHE mode on platforms that require it.
>         I kept the AB/RB's, but please shout if you disagree!
>
>  Documentation/admin-guide/kernel-parameters.txt |  2 ++
>  arch/arm64/include/asm/kvm_host.h               |  1 +
>  arch/arm64/kvm/arm.c                            | 14 +++++++++++++-
>  3 files changed, 16 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> index 91ba391f9b32..f268731a3d4d 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -2365,6 +2365,8 @@
>         kvm-arm.mode=
>                         [KVM,ARM] Select one of KVM/arm64's modes of operation.
>
> +                       none: Forcefully disable KVM.
> +
>                         nvhe: Standard nVHE-based mode, without support for
>                               protected guests.
>
> diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
> index f8be56d5342b..019490c67976 100644
> --- a/arch/arm64/include/asm/kvm_host.h
> +++ b/arch/arm64/include/asm/kvm_host.h
> @@ -58,6 +58,7 @@
>  enum kvm_mode {
>         KVM_MODE_DEFAULT,
>         KVM_MODE_PROTECTED,
> +       KVM_MODE_NONE,
>  };
>  enum kvm_mode kvm_get_mode(void);
>
> diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
> index fe102cd2e518..658171231af9 100644
> --- a/arch/arm64/kvm/arm.c
> +++ b/arch/arm64/kvm/arm.c
> @@ -2064,6 +2064,11 @@ int kvm_arch_init(void *opaque)
>                 return -ENODEV;
>         }
>
> +       if (kvm_get_mode() == KVM_MODE_NONE) {
> +               kvm_info("KVM disabled from command line\n");
> +               return -ENODEV;
> +       }
> +
>         in_hyp_mode = is_kernel_in_hyp_mode();
>
>         if (cpus_have_final_cap(ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE) ||
> @@ -2137,8 +2142,15 @@ static int __init early_kvm_mode_cfg(char *arg)
>                 return 0;
>         }
>
> -       if (strcmp(arg, "nvhe") == 0 && !WARN_ON(is_kernel_in_hyp_mode()))
> +       if (strcmp(arg, "nvhe") == 0 && !WARN_ON(is_kernel_in_hyp_mode())) {
> +               kvm_mode = KVM_MODE_DEFAULT;
>                 return 0;
> +       }
> +
> +       if (strcmp(arg, "none") == 0) {
> +               kvm_mode = KVM_MODE_NONE;
> +               return 0;
> +       }
>
>         return -EINVAL;
>  }
> --
> 2.30.2
>
> --
> To unsubscribe from this group and stop receiving emails from it, send an email to kernel-team+unsubscribe@android.com.
>

Re: [PATCH v2] KVM: arm64: Allow KVM to be disabled from the command line

[Andrew Scull]

Reviewed-by: Andrew Scull <ascull@google.com>


On Fri, 1 Oct 2021 at 18:06, Marc Zyngier <maz@kernel.org> wrote:
>
> Although KVM can be compiled out of the kernel, it cannot be disabled
> at runtime. Allow this possibility by introducing a new mode that
> will prevent KVM from initialising.
>
> This is useful in the (limited) circumstances where you don't want
> KVM to be available (what is wrong with you?), or when you want
> to install another hypervisor instead (good luck with that).
>
> Reviewed-by: David Brazdil <dbrazdil@google.com>
> Acked-by: Will Deacon <will@kernel.org>
> Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com>
> Signed-off-by: Marc Zyngier <maz@kernel.org>
> ---
>
> Notes:
>     v2: Dropped the id_aa64mmfr1_vh=0 setting so that KVM can be disabled
>         and yet stay in VHE mode on platforms that require it.
>         I kept the AB/RB's, but please shout if you disagree!
>
>  Documentation/admin-guide/kernel-parameters.txt |  2 ++
>  arch/arm64/include/asm/kvm_host.h               |  1 +
>  arch/arm64/kvm/arm.c                            | 14 +++++++++++++-
>  3 files changed, 16 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> index 91ba391f9b32..f268731a3d4d 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -2365,6 +2365,8 @@
>         kvm-arm.mode=
>                         [KVM,ARM] Select one of KVM/arm64's modes of operation.
>
> +                       none: Forcefully disable KVM.
> +
>                         nvhe: Standard nVHE-based mode, without support for
>                               protected guests.
>
> diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
> index f8be56d5342b..019490c67976 100644
> --- a/arch/arm64/include/asm/kvm_host.h
> +++ b/arch/arm64/include/asm/kvm_host.h
> @@ -58,6 +58,7 @@
>  enum kvm_mode {
>         KVM_MODE_DEFAULT,
>         KVM_MODE_PROTECTED,
> +       KVM_MODE_NONE,
>  };
>  enum kvm_mode kvm_get_mode(void);
>
> diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
> index fe102cd2e518..658171231af9 100644
> --- a/arch/arm64/kvm/arm.c
> +++ b/arch/arm64/kvm/arm.c
> @@ -2064,6 +2064,11 @@ int kvm_arch_init(void *opaque)
>                 return -ENODEV;
>         }
>
> +       if (kvm_get_mode() == KVM_MODE_NONE) {
> +               kvm_info("KVM disabled from command line\n");
> +               return -ENODEV;
> +       }
> +
>         in_hyp_mode = is_kernel_in_hyp_mode();
>
>         if (cpus_have_final_cap(ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE) ||
> @@ -2137,8 +2142,15 @@ static int __init early_kvm_mode_cfg(char *arg)
>                 return 0;
>         }
>
> -       if (strcmp(arg, "nvhe") == 0 && !WARN_ON(is_kernel_in_hyp_mode()))
> +       if (strcmp(arg, "nvhe") == 0 && !WARN_ON(is_kernel_in_hyp_mode())) {
> +               kvm_mode = KVM_MODE_DEFAULT;
>                 return 0;
> +       }
> +
> +       if (strcmp(arg, "none") == 0) {
> +               kvm_mode = KVM_MODE_NONE;
> +               return 0;
> +       }
>
>         return -EINVAL;
>  }
> --
> 2.30.2
>
> --
> To unsubscribe from this group and stop receiving emails from it, send an email to kernel-team+unsubscribe@android.com.
>
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kvmarm@lists.cs.columbia.edu
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Re: [PATCH v2] KVM: arm64: Allow KVM to be disabled from the command line

[Andrew Scull]

Reviewed-by: Andrew Scull <ascull@google.com>


On Fri, 1 Oct 2021 at 18:06, Marc Zyngier <maz@kernel.org> wrote:
>
> Although KVM can be compiled out of the kernel, it cannot be disabled
> at runtime. Allow this possibility by introducing a new mode that
> will prevent KVM from initialising.
>
> This is useful in the (limited) circumstances where you don't want
> KVM to be available (what is wrong with you?), or when you want
> to install another hypervisor instead (good luck with that).
>
> Reviewed-by: David Brazdil <dbrazdil@google.com>
> Acked-by: Will Deacon <will@kernel.org>
> Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com>
> Signed-off-by: Marc Zyngier <maz@kernel.org>
> ---
>
> Notes:
>     v2: Dropped the id_aa64mmfr1_vh=0 setting so that KVM can be disabled
>         and yet stay in VHE mode on platforms that require it.
>         I kept the AB/RB's, but please shout if you disagree!
>
>  Documentation/admin-guide/kernel-parameters.txt |  2 ++
>  arch/arm64/include/asm/kvm_host.h               |  1 +
>  arch/arm64/kvm/arm.c                            | 14 +++++++++++++-
>  3 files changed, 16 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> index 91ba391f9b32..f268731a3d4d 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -2365,6 +2365,8 @@
>         kvm-arm.mode=
>                         [KVM,ARM] Select one of KVM/arm64's modes of operation.
>
> +                       none: Forcefully disable KVM.
> +
>                         nvhe: Standard nVHE-based mode, without support for
>                               protected guests.
>
> diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
> index f8be56d5342b..019490c67976 100644
> --- a/arch/arm64/include/asm/kvm_host.h
> +++ b/arch/arm64/include/asm/kvm_host.h
> @@ -58,6 +58,7 @@
>  enum kvm_mode {
>         KVM_MODE_DEFAULT,
>         KVM_MODE_PROTECTED,
> +       KVM_MODE_NONE,
>  };
>  enum kvm_mode kvm_get_mode(void);
>
> diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
> index fe102cd2e518..658171231af9 100644
> --- a/arch/arm64/kvm/arm.c
> +++ b/arch/arm64/kvm/arm.c
> @@ -2064,6 +2064,11 @@ int kvm_arch_init(void *opaque)
>                 return -ENODEV;
>         }
>
> +       if (kvm_get_mode() == KVM_MODE_NONE) {
> +               kvm_info("KVM disabled from command line\n");
> +               return -ENODEV;
> +       }
> +
>         in_hyp_mode = is_kernel_in_hyp_mode();
>
>         if (cpus_have_final_cap(ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE) ||
> @@ -2137,8 +2142,15 @@ static int __init early_kvm_mode_cfg(char *arg)
>                 return 0;
>         }
>
> -       if (strcmp(arg, "nvhe") == 0 && !WARN_ON(is_kernel_in_hyp_mode()))
> +       if (strcmp(arg, "nvhe") == 0 && !WARN_ON(is_kernel_in_hyp_mode())) {
> +               kvm_mode = KVM_MODE_DEFAULT;
>                 return 0;
> +       }
> +
> +       if (strcmp(arg, "none") == 0) {
> +               kvm_mode = KVM_MODE_NONE;
> +               return 0;
> +       }
>
>         return -EINVAL;
>  }
> --
> 2.30.2
>
> --
> To unsubscribe from this group and stop receiving emails from it, send an email to kernel-team+unsubscribe@android.com.
>

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Re: [PATCH v2] KVM: arm64: Allow KVM to be disabled from the command line

[Marc Zyngier]

On Fri, 1 Oct 2021 18:05:53 +0100, Marc Zyngier wrote:
> Although KVM can be compiled out of the kernel, it cannot be disabled
> at runtime. Allow this possibility by introducing a new mode that
> will prevent KVM from initialising.
> 
> This is useful in the (limited) circumstances where you don't want
> KVM to be available (what is wrong with you?), or when you want
> to install another hypervisor instead (good luck with that).

Applied to next, thanks!

[1/1] KVM: arm64: Allow KVM to be disabled from the command line
      commit: b6a68b97af23cc75781bed38221ce73144ac2e39

Cheers,

	M.
-- 
Without deviation from the norm, progress is not possible.

Re: [PATCH v2] KVM: arm64: Allow KVM to be disabled from the command line

[Marc Zyngier]

On Fri, 1 Oct 2021 18:05:53 +0100, Marc Zyngier wrote:
> Although KVM can be compiled out of the kernel, it cannot be disabled
> at runtime. Allow this possibility by introducing a new mode that
> will prevent KVM from initialising.
> 
> This is useful in the (limited) circumstances where you don't want
> KVM to be available (what is wrong with you?), or when you want
> to install another hypervisor instead (good luck with that).

Applied to next, thanks!

[1/1] KVM: arm64: Allow KVM to be disabled from the command line
      commit: b6a68b97af23cc75781bed38221ce73144ac2e39

Cheers,

	M.
-- 
Without deviation from the norm, progress is not possible.


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Re: [PATCH v2] KVM: arm64: Allow KVM to be disabled from the command line

[Marc Zyngier]

On Fri, 1 Oct 2021 18:05:53 +0100, Marc Zyngier wrote:
> Although KVM can be compiled out of the kernel, it cannot be disabled
> at runtime. Allow this possibility by introducing a new mode that
> will prevent KVM from initialising.
> 
> This is useful in the (limited) circumstances where you don't want
> KVM to be available (what is wrong with you?), or when you want
> to install another hypervisor instead (good luck with that).

Applied to next, thanks!

[1/1] KVM: arm64: Allow KVM to be disabled from the command line
      commit: b6a68b97af23cc75781bed38221ce73144ac2e39

Cheers,

	M.
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