From: Cornelia Huck <cohuck@redhat.com>
To: Eric Auger <eric.auger@redhat.com>,
eric.auger.pro@gmail.com, eric.auger@redhat.com,
qemu-devel@nongnu.org, qemu-arm@nongnu.org,
peter.maydell@linaro.org, maz@kernel.org, oliver.upton@linux.dev,
sebott@redhat.com, gshan@redhat.com, ddutile@redhat.com,
peterx@redhat.com, philmd@linaro.org, pbonzini@redhat.com
Subject: Re: [PATCH v3 06/11] kvm-all: Add the capability to blacklist some KVM regs
Date: Tue, 25 Nov 2025 18:09:31 +0100 [thread overview]
Message-ID: <87h5uiox84.fsf@redhat.com> (raw)
In-Reply-To: <20251125100859.506228-7-eric.auger@redhat.com>
On Tue, Nov 25 2025, Eric Auger <eric.auger@redhat.com> wrote:
> On ARM we want to be able to blacklist registers that are exposed
> by KVM. To mitigate some mitigation failures that occur when a new
> register is exposed and does not exist on the destination, some
> registers are tagged "hidden" and their state won't be saved. As the
> state is not saved and they are expected not to be used, we want to
> enforce they aren't. So let's check this. The new CPUClass hide_reg()
> callback is optional and will be implemented on ARM in a subsequent
> patch.
Maybe "hide" or "ignore" instead of "blacklist"?
>
> Signed-off-by: Eric Auger <eric.auger@redhat.com>
> ---
> include/hw/core/cpu.h | 2 ++
> accel/kvm/kvm-all.c | 12 ++++++++++++
> 2 files changed, 14 insertions(+)
>
Otherwise,
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
next prev parent reply other threads:[~2025-11-25 17:10 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-25 10:07 [PATCH v3 00/11] Mitigation of "failed to load cpu:cpreg_vmstate_array_len" migration failures Eric Auger
2025-11-25 10:07 ` [PATCH v3 01/11] hw/arm/virt: Rename arm_virtio_compat into arm_virt_compat_defaults Eric Auger
2025-11-25 16:42 ` Cornelia Huck
2025-11-26 15:30 ` Sebastian Ott
2025-11-26 16:29 ` Sebastian Ott
2025-11-25 10:07 ` [PATCH v3 02/11] target/arm/machine: Improve traces on register mismatch during migration Eric Auger
2025-11-25 10:07 ` [PATCH v3 03/11] target/arm/cpu: Allow registers to be hidden Eric Auger
2025-11-25 17:04 ` Cornelia Huck
2025-12-22 13:17 ` Eric Auger
2025-12-22 13:21 ` Eric Auger
2025-11-26 16:28 ` Sebastian Ott
2025-11-25 10:07 ` [PATCH v3 04/11] target/arm/machine: Allow extra regs in the incoming stream Eric Auger
2025-11-25 17:07 ` Cornelia Huck
2025-11-25 10:07 ` [PATCH v3 05/11] target/arm/helper: Skip hidden registers Eric Auger
2025-11-25 10:07 ` [PATCH v3 06/11] kvm-all: Add the capability to blacklist some KVM regs Eric Auger
2025-11-25 17:09 ` Cornelia Huck [this message]
2025-11-26 16:42 ` Sebastian Ott
2025-11-25 10:07 ` [PATCH v3 07/11] target/arm/cpu: Implement hide_reg callback() Eric Auger
2025-11-25 17:10 ` Cornelia Huck
2025-11-26 16:55 ` Sebastian Ott
2025-11-25 10:07 ` [PATCH v3 08/11] target/arm/cpu: Expose x-mig-hidden-regs and x-mig-safe-missing-regs properties Eric Auger
2025-11-25 17:17 ` Cornelia Huck
2025-11-25 10:07 ` [PATCH v3 09/11] hw/arm/virt: Declare AArch32 DBGDTRTX as safe to ignore in incoming stream Eric Auger
2025-11-25 17:20 ` Cornelia Huck
2025-11-25 10:07 ` [PATCH v3 10/11] Revert "target/arm: Reinstate bogus AArch32 DBGDTRTX register for migration compat" Eric Auger
2025-11-25 10:08 ` [PATCH v3 11/11] hw/arm/virt: [DO NOT UPSTREAM] Enforce compatibility with older kernels Eric Auger
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