2023-02-09 17:58:11 +00:00
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KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2024-10-25 18:23:42 +00:00
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KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2024-10-25 18:23:42 +00:00
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2024-10-25 18:23:43 +00:00
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KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2023-08-15 19:38:49 +01:00
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2026-01-08 17:32:26 +00:00
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KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2023-08-15 19:38:51 +01:00
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2024-06-20 16:46:50 +00:00
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2024-08-20 14:17:59 +01:00
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2024-06-25 14:00:42 +01:00
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2025-07-08 10:25:15 -07:00
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2024-06-25 14:00:42 +01:00
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2024-12-17 14:23:16 +00:00
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2024-08-27 16:25:13 +01:00
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KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2024-08-27 16:25:13 +01:00
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2023-08-15 19:38:49 +01:00
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2024-06-25 14:00:42 +01:00
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2025-07-08 10:25:15 -07:00
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2023-08-15 19:38:49 +01:00
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2023-08-15 19:38:51 +01:00
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2024-10-25 18:23:45 +00:00
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2023-08-15 19:38:51 +01:00
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KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2024-08-27 16:25:13 +01:00
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KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2023-08-15 19:38:52 +01:00
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KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2023-08-15 19:38:52 +01:00
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2024-12-17 14:23:16 +00:00
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KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2024-06-20 16:46:50 +00:00
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2024-10-25 18:23:45 +00:00
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2024-06-20 16:46:50 +00:00
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KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2023-08-15 19:38:49 +01:00
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2024-10-25 18:23:42 +00:00
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2023-08-15 19:38:49 +01:00
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2024-10-25 18:23:42 +00:00
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2023-08-15 19:38:49 +01:00
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2024-10-25 18:23:42 +00:00
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2023-08-15 19:38:49 +01:00
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2024-10-25 18:23:42 +00:00
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2023-08-15 19:38:49 +01:00
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2024-10-25 18:23:42 +00:00
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2023-08-15 19:38:49 +01:00
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2024-10-25 18:23:42 +00:00
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2023-08-15 19:38:49 +01:00
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2024-10-25 18:23:42 +00:00
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2023-08-15 19:38:49 +01:00
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2024-10-25 18:23:42 +00:00
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2023-08-15 19:38:49 +01:00
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2024-10-25 18:23:42 +00:00
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2023-08-15 19:38:49 +01:00
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2024-10-25 18:23:42 +00:00
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2023-08-15 19:38:49 +01:00
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2024-10-25 18:23:42 +00:00
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2023-08-15 19:38:49 +01:00
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2024-10-25 18:23:42 +00:00
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2024-08-27 16:25:13 +01:00
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KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2024-06-25 14:00:42 +01:00
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2024-08-27 16:25:13 +01:00
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KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2023-08-15 19:38:52 +01:00
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2023-08-15 19:38:52 +01:00
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2024-10-25 18:23:42 +00:00
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2024-06-20 16:46:50 +00:00
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2024-12-19 17:33:50 +00:00
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2024-06-20 16:46:50 +00:00
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KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2023-08-15 19:38:52 +01:00
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2024-12-17 14:23:16 +00:00
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2024-06-20 16:46:50 +00:00
|
|
|
|
2024-10-25 18:23:45 +00:00
|
|
|
|
KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2023-08-15 19:38:53 +01:00
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2023-08-15 19:39:02 +01:00
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2024-02-14 13:18:15 +00:00
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KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2023-08-15 19:38:53 +01:00
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2023-08-15 19:39:02 +01:00
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2024-02-14 13:18:15 +00:00
|
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|
KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2023-08-15 19:38:53 +01:00
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2023-08-15 19:39:02 +01:00
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2024-02-14 13:18:15 +00:00
|
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|
|
|
|
|
|
KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2025-04-25 13:53:18 +01:00
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KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2023-08-15 19:38:49 +01:00
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2026-01-08 17:32:26 +00:00
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2023-08-15 19:38:49 +01:00
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2024-08-27 16:25:13 +01:00
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2023-08-15 19:38:49 +01:00
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2025-07-08 10:25:15 -07:00
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2023-08-15 19:38:49 +01:00
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2024-10-23 15:53:37 +01:00
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2024-06-25 14:00:42 +01:00
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2023-08-15 19:38:49 +01:00
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2023-10-23 10:54:42 +01:00
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2023-08-15 19:38:49 +01:00
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2023-08-21 18:44:15 +01:00
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2023-10-23 10:54:42 +01:00
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2024-12-17 14:23:16 +00:00
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2023-08-15 19:38:49 +01:00
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2024-12-17 14:23:16 +00:00
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2023-08-15 19:38:49 +01:00
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2024-06-23 10:46:45 +01:00
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2023-08-15 19:38:49 +01:00
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2024-06-23 10:46:45 +01:00
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2023-08-15 19:38:49 +01:00
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2023-08-15 19:38:51 +01:00
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2024-10-25 18:23:45 +00:00
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2023-08-15 19:38:51 +01:00
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2024-10-25 18:23:45 +00:00
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2023-08-15 19:38:51 +01:00
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2024-10-25 18:23:45 +00:00
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2023-08-15 19:38:51 +01:00
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2026-01-30 17:44:35 +08:00
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2023-08-15 19:38:51 +01:00
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2025-09-01 13:40:36 +01:00
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2023-08-15 19:38:51 +01:00
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2024-06-20 16:46:50 +00:00
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2023-08-15 19:38:52 +01:00
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2024-12-17 14:23:16 +00:00
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2024-08-20 14:17:59 +01:00
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2024-08-27 16:25:13 +01:00
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KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2023-08-15 19:39:02 +01:00
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2025-01-24 17:09:27 +00:00
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2023-08-15 19:38:53 +01:00
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2023-08-15 19:39:02 +01:00
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2025-01-24 17:09:27 +00:00
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2025-04-25 13:53:18 +01:00
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2025-01-24 17:09:27 +00:00
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2025-04-25 13:53:18 +01:00
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2025-01-24 17:09:27 +00:00
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2023-08-15 19:38:53 +01:00
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2025-04-25 13:53:18 +01:00
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2023-08-15 19:39:02 +01:00
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2023-08-15 19:38:53 +01:00
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2023-08-15 19:38:54 +01:00
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2025-03-11 14:44:30 +00:00
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2025-07-08 10:25:15 -07:00
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2025-03-11 14:44:30 +00:00
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2025-04-25 14:00:01 +01:00
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2023-08-15 19:38:55 +01:00
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2023-12-14 10:01:47 +00:00
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2023-08-15 19:38:55 +01:00
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2023-08-15 19:39:02 +01:00
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2023-08-15 19:38:55 +01:00
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2025-04-25 14:00:01 +01:00
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2023-08-15 19:38:56 +01:00
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2025-04-25 13:53:18 +01:00
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2023-08-15 19:38:56 +01:00
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2025-04-25 14:00:01 +01:00
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2023-08-15 19:38:56 +01:00
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2025-04-25 14:00:01 +01:00
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2023-08-15 19:38:56 +01:00
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2025-04-25 14:00:01 +01:00
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2023-12-14 10:01:49 +00:00
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2026-03-19 15:53:05 +00:00
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2023-08-15 19:38:53 +01:00
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2025-01-24 17:09:27 +00:00
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2025-01-27 11:58:38 +00:00
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2025-01-24 17:09:27 +00:00
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2025-01-27 11:58:38 +00:00
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2025-01-24 17:09:27 +00:00
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KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2024-02-14 13:18:11 +00:00
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2025-01-24 15:51:12 +00:00
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2025-12-10 17:30:22 +00:00
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2025-01-24 15:51:12 +00:00
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2025-12-10 17:30:22 +00:00
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2026-03-19 15:53:05 +00:00
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2025-01-24 15:51:12 +00:00
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2025-12-10 17:30:22 +00:00
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2025-01-24 15:51:12 +00:00
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2025-04-22 21:16:34 +01:00
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2026-03-19 15:53:05 +00:00
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2025-01-24 15:51:12 +00:00
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2025-12-10 17:30:22 +00:00
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2025-01-24 15:51:12 +00:00
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2025-12-10 17:30:22 +00:00
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2025-01-24 15:51:12 +00:00
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2025-12-10 17:30:22 +00:00
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2025-01-24 15:51:12 +00:00
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2025-12-10 17:30:22 +00:00
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2025-01-24 15:51:12 +00:00
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2025-12-10 17:30:22 +00:00
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2025-01-24 15:51:12 +00:00
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2025-12-10 17:30:22 +00:00
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2025-01-24 15:51:12 +00:00
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2025-12-10 17:30:22 +00:00
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2025-01-24 15:51:12 +00:00
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2025-04-22 21:16:34 +01:00
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2026-03-19 15:53:05 +00:00
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2025-01-24 15:51:12 +00:00
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2025-04-25 13:53:18 +01:00
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KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2023-08-15 19:38:53 +01:00
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2023-08-15 19:39:02 +01:00
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2025-01-24 19:04:26 +00:00
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|
KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2025-04-25 13:53:18 +01:00
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2024-02-14 13:18:11 +00:00
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|
KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2024-02-14 13:18:11 +00:00
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|
KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2025-01-24 19:04:26 +00:00
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|
KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2023-08-15 19:38:53 +01:00
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2024-02-14 13:18:11 +00:00
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2023-08-15 19:38:53 +01:00
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2025-04-25 13:53:18 +01:00
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2023-08-15 19:38:53 +01:00
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2025-04-25 13:53:18 +01:00
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2023-08-15 19:38:53 +01:00
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2025-04-25 13:53:18 +01:00
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2026-01-22 08:51:53 +00:00
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2025-04-25 13:53:18 +01:00
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2024-02-14 13:18:11 +00:00
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2025-04-25 13:53:18 +01:00
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2025-01-24 15:51:12 +00:00
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2023-08-15 19:38:53 +01:00
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2025-01-24 17:09:27 +00:00
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2025-01-24 15:51:12 +00:00
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2023-08-15 19:38:53 +01:00
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KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2024-10-25 18:23:41 +00:00
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KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2024-02-14 13:18:15 +00:00
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KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2024-02-14 13:18:10 +00:00
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2023-08-15 19:38:53 +01:00
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2026-02-02 18:43:14 +00:00
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2024-02-14 13:18:10 +00:00
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2025-04-26 12:05:04 +01:00
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2024-02-14 13:18:10 +00:00
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2024-10-25 18:23:43 +00:00
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2025-04-26 12:05:04 +01:00
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2024-02-14 13:18:10 +00:00
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2024-10-25 18:23:43 +00:00
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2025-04-26 12:05:04 +01:00
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2024-02-14 13:18:10 +00:00
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2023-08-15 19:38:53 +01:00
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2024-02-14 13:18:17 +00:00
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KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
|
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2025-04-26 12:05:04 +01:00
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KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2025-04-26 12:05:04 +01:00
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KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2024-02-14 13:18:16 +00:00
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2024-02-14 13:18:19 +00:00
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2024-02-14 13:18:16 +00:00
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2024-10-25 18:23:43 +00:00
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2024-02-14 13:18:16 +00:00
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KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2023-08-15 19:38:53 +01:00
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2025-03-11 14:44:30 +00:00
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2025-04-26 12:05:04 +01:00
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2023-08-15 19:38:54 +01:00
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2023-08-15 19:38:56 +01:00
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2025-04-26 12:05:04 +01:00
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2023-08-15 19:38:56 +01:00
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2023-12-14 10:01:49 +00:00
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2025-04-26 12:05:04 +01:00
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2023-12-14 10:01:49 +00:00
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2023-08-15 19:38:55 +01:00
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2025-04-26 12:05:04 +01:00
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2023-08-15 19:39:02 +01:00
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2024-02-14 13:18:08 +00:00
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2023-08-15 19:39:02 +01:00
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2023-08-15 19:38:55 +01:00
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2025-04-25 17:42:49 +01:00
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2026-05-20 10:19:41 +01:00
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2025-04-25 17:42:49 +01:00
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2025-04-26 11:42:15 +01:00
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2023-08-15 19:38:53 +01:00
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2025-04-26 11:42:15 +01:00
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2024-02-14 13:18:16 +00:00
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2023-08-15 19:38:53 +01:00
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2025-04-26 12:05:04 +01:00
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2023-08-15 19:38:53 +01:00
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KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2024-10-25 18:23:43 +00:00
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KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2024-02-14 13:18:16 +00:00
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2026-01-08 17:32:28 +00:00
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2024-02-14 13:18:16 +00:00
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KVM: arm64: nv: Add trap forwarding infrastructure
A significant part of what a NV hypervisor needs to do is to decide
whether a trap from a L2+ guest has to be forwarded to a L1 guest
or handled locally. This is done by checking for the trap bits that
the guest hypervisor has set and acting accordingly, as described by
the architecture.
A previous approach was to sprinkle a bunch of checks in all the
system register accessors, but this is pretty error prone and doesn't
help getting an overview of what is happening.
Instead, implement a set of global tables that describe a trap bit,
combinations of trap bits, behaviours on trap, and what bits must
be evaluated on a system register trap.
Although this is painful to describe, this allows to specify each
and every control bit in a static manner. To make it efficient,
the table is inserted in an xarray that is global to the system,
and checked each time we trap a system register while running
a L2 guest.
Add the basic infrastructure for now, while additional patches will
implement configuration registers.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-15-maz@kernel.org
2023-08-15 19:38:48 +01:00
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2024-12-19 14:41:13 -08:00
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2024-04-19 11:29:26 +01:00
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2025-07-08 10:25:08 -07:00
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2024-04-19 11:29:26 +01:00
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2024-12-19 14:41:13 -08:00
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2024-04-19 11:29:26 +01:00
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2024-12-19 14:41:13 -08:00
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2024-04-19 11:29:26 +01:00
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2023-02-09 17:58:11 +00:00
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KVM: arm64: nv: Fix PSTATE construction on illegal exception return
kvm_check_illegal_exception_return() sourced the flags {N,Z,C,V} and
masks {D,A,I,F} of the resulting PSTATE from the current PSTATE, but
R_VWJHB takes them from the SPSR being returned to and leaves
PSTATE.{EL,SP,nRW} (and EXLOCK when FEAT_GCS) unchanged. PAN, ALLINT
and PM were not applied at all.
Build the PSTATE by taking those fields from the SPSR while preserving
EL, SP, nRW and EXLOCK from the current PSTATE, then set IL.
Fixes: 47f3a2fc765a ("KVM: arm64: nv: Support virtual EL2 exceptions")
Suggested-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/all/86wlvxs5r0.wl-maz@kernel.org/
Signed-off-by: Fuad Tabba <tabba@google.com>
Link: https://patch.msgid.link/20260617144907.2972095-1-tabba@google.com
[maz: tidied things a bit]
Signed-off-by: Marc Zyngier <maz@kernel.org>
2026-06-17 15:49:07 +01:00
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2023-02-09 17:58:11 +00:00
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KVM: arm64: nv: Fix PSTATE construction on illegal exception return
kvm_check_illegal_exception_return() sourced the flags {N,Z,C,V} and
masks {D,A,I,F} of the resulting PSTATE from the current PSTATE, but
R_VWJHB takes them from the SPSR being returned to and leaves
PSTATE.{EL,SP,nRW} (and EXLOCK when FEAT_GCS) unchanged. PAN, ALLINT
and PM were not applied at all.
Build the PSTATE by taking those fields from the SPSR while preserving
EL, SP, nRW and EXLOCK from the current PSTATE, then set IL.
Fixes: 47f3a2fc765a ("KVM: arm64: nv: Support virtual EL2 exceptions")
Suggested-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/all/86wlvxs5r0.wl-maz@kernel.org/
Signed-off-by: Fuad Tabba <tabba@google.com>
Link: https://patch.msgid.link/20260617144907.2972095-1-tabba@google.com
[maz: tidied things a bit]
Signed-off-by: Marc Zyngier <maz@kernel.org>
2026-06-17 15:49:07 +01:00
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2023-02-09 17:58:11 +00:00
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2024-04-19 11:29:33 +01:00
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2023-02-09 17:58:11 +00:00
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2024-05-28 11:06:31 +01:00
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2024-04-19 11:29:33 +01:00
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2024-05-28 11:06:31 +01:00
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2024-04-19 11:29:33 +01:00
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2024-05-28 11:06:31 +01:00
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2026-06-18 13:16:40 +01:00
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2024-04-19 11:29:33 +01:00
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2023-02-09 17:58:11 +00:00
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2025-02-25 17:29:26 +00:00
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2023-02-09 17:58:11 +00:00
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2024-04-19 11:29:33 +01:00
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2023-02-09 17:58:11 +00:00
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2025-02-25 17:29:26 +00:00
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2023-02-09 17:58:11 +00:00
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2024-10-25 18:25:59 +00:00
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2025-03-15 18:12:11 +09:00
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2023-02-09 17:58:11 +00:00
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2025-07-08 10:25:11 -07:00
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2026-06-15 14:11:16 +01:00
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2025-07-08 10:25:11 -07:00
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2023-02-09 17:58:11 +00:00
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2026-05-11 11:46:11 +01:00
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2023-02-09 17:58:11 +00:00
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2026-05-11 11:46:11 +01:00
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2023-02-09 17:58:11 +00:00
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2025-03-15 18:12:11 +09:00
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2024-10-25 18:25:59 +00:00
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2023-02-09 17:58:11 +00:00
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2025-07-08 10:25:10 -07:00
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2025-08-13 17:37:47 +01:00
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2025-07-08 10:25:22 -07:00
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2025-07-08 10:25:10 -07:00
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2025-07-08 10:25:11 -07:00
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2026-06-18 13:16:42 +01:00
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2025-07-08 10:25:11 -07:00
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