From: Reiji Watanabe <reijiw@google.com>
To: Marc Zyngier <maz@kernel.org>
Cc: kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
Schspa Shi <schspa@gmail.com>,
kernel-team@android.com, Oliver Upton <oliver.upton@linux.dev>
Subject: Re: [PATCH 10/19] KVM: arm64: vgic-v3: Convert userspace accessors over to FIELD_GET/FIELD_PREP
Date: Tue, 12 Jul 2022 22:51:25 -0700 [thread overview]
Message-ID: <CAAeT=FwrHpyhHD3spc_e70uQCHoHwc-n80iMY30ypymgFEQ7QA@mail.gmail.com> (raw)
In-Reply-To: <20220706164304.1582687-11-maz@kernel.org>
On Wed, Jul 6, 2022 at 10:05 AM Marc Zyngier <maz@kernel.org> wrote:
>
> The GICv3 userspace accessors are all about dealing with conversion
> between fields from architectural registers and internal representations.
>
> However, and owing to the age of this code, the accessors use
> a combination of shift/mask that is hard to read. It is nonetheless
> easy to make it better by using the FIELD_{GET,PREP} macros that solely
> rely on a mask.
>
> This results in somewhat nicer looking code, and is probably easier
> to maintain.
>
> Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Reiji Watanabe <reijiw@google.com>
WARNING: multiple messages have this Message-ID (diff)
From: Reiji Watanabe <reijiw@google.com>
To: Marc Zyngier <maz@kernel.org>
Cc: kvm@vger.kernel.org, Schspa Shi <schspa@gmail.com>,
Oliver Upton <oliver.upton@linux.dev>,
kernel-team@android.com, kvmarm@lists.cs.columbia.edu,
Linux ARM <linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH 10/19] KVM: arm64: vgic-v3: Convert userspace accessors over to FIELD_GET/FIELD_PREP
Date: Tue, 12 Jul 2022 22:51:25 -0700 [thread overview]
Message-ID: <CAAeT=FwrHpyhHD3spc_e70uQCHoHwc-n80iMY30ypymgFEQ7QA@mail.gmail.com> (raw)
In-Reply-To: <20220706164304.1582687-11-maz@kernel.org>
On Wed, Jul 6, 2022 at 10:05 AM Marc Zyngier <maz@kernel.org> wrote:
>
> The GICv3 userspace accessors are all about dealing with conversion
> between fields from architectural registers and internal representations.
>
> However, and owing to the age of this code, the accessors use
> a combination of shift/mask that is hard to read. It is nonetheless
> easy to make it better by using the FIELD_{GET,PREP} macros that solely
> rely on a mask.
>
> This results in somewhat nicer looking code, and is probably easier
> to maintain.
>
> Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Reiji Watanabe <reijiw@google.com>
_______________________________________________
kvmarm mailing list
kvmarm@lists.cs.columbia.edu
https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
WARNING: multiple messages have this Message-ID (diff)
From: Reiji Watanabe <reijiw@google.com>
To: Marc Zyngier <maz@kernel.org>
Cc: kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
Schspa Shi <schspa@gmail.com>,
kernel-team@android.com, Oliver Upton <oliver.upton@linux.dev>
Subject: Re: [PATCH 10/19] KVM: arm64: vgic-v3: Convert userspace accessors over to FIELD_GET/FIELD_PREP
Date: Tue, 12 Jul 2022 22:51:25 -0700 [thread overview]
Message-ID: <CAAeT=FwrHpyhHD3spc_e70uQCHoHwc-n80iMY30ypymgFEQ7QA@mail.gmail.com> (raw)
In-Reply-To: <20220706164304.1582687-11-maz@kernel.org>
On Wed, Jul 6, 2022 at 10:05 AM Marc Zyngier <maz@kernel.org> wrote:
>
> The GICv3 userspace accessors are all about dealing with conversion
> between fields from architectural registers and internal representations.
>
> However, and owing to the age of this code, the accessors use
> a combination of shift/mask that is hard to read. It is nonetheless
> easy to make it better by using the FIELD_{GET,PREP} macros that solely
> rely on a mask.
>
> This results in somewhat nicer looking code, and is probably easier
> to maintain.
>
> Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Reiji Watanabe <reijiw@google.com>
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2022-07-13 5:51 UTC|newest]
Thread overview: 141+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-06 16:42 [PATCH 00/19] KVM: arm64: vgic-v3 userspace access consolidation (and other goodies) Marc Zyngier
2022-07-06 16:42 ` Marc Zyngier
2022-07-06 16:42 ` Marc Zyngier
2022-07-06 16:42 ` [PATCH 01/19] KVM: arm64: Add get_reg_by_id() as a sys_reg_desc retrieving helper Marc Zyngier
2022-07-06 16:42 ` Marc Zyngier
2022-07-06 16:42 ` Marc Zyngier
2022-07-07 4:05 ` Reiji Watanabe
2022-07-07 4:05 ` Reiji Watanabe
2022-07-07 4:05 ` Reiji Watanabe
2022-07-07 5:16 ` Reiji Watanabe
2022-07-07 5:16 ` Reiji Watanabe
2022-07-07 5:16 ` Reiji Watanabe
2022-07-06 16:42 ` [PATCH 02/19] KVM: arm64: Reorder handling of invariant sysregs from userspace Marc Zyngier
2022-07-06 16:42 ` Marc Zyngier
2022-07-06 16:42 ` Marc Zyngier
2022-07-07 4:24 ` Reiji Watanabe
2022-07-07 4:24 ` Reiji Watanabe
2022-07-07 4:24 ` Reiji Watanabe
2022-07-06 16:42 ` [PATCH 03/19] KVM: arm64: Introduce generic get_user/set_user helpers for system registers Marc Zyngier
2022-07-06 16:42 ` Marc Zyngier
2022-07-06 16:42 ` Marc Zyngier
2022-07-08 19:20 ` Oliver Upton
2022-07-08 19:20 ` Oliver Upton
2022-07-08 19:20 ` Oliver Upton
2022-07-09 6:59 ` Reiji Watanabe
2022-07-09 6:59 ` Reiji Watanabe
2022-07-09 6:59 ` Reiji Watanabe
2022-07-06 16:42 ` [PATCH 04/19] KVM: arm64: Push checks for 64bit registers into the low-level accessors Marc Zyngier
2022-07-06 16:42 ` Marc Zyngier
2022-07-06 16:42 ` Marc Zyngier
2022-07-08 6:13 ` Reiji Watanabe
2022-07-08 6:13 ` Reiji Watanabe
2022-07-08 6:13 ` Reiji Watanabe
2022-07-08 8:05 ` Marc Zyngier
2022-07-08 8:05 ` Marc Zyngier
2022-07-08 8:05 ` Marc Zyngier
2022-07-06 16:42 ` [PATCH 05/19] KVM: arm64: Consolidate sysreg userspace accesses Marc Zyngier
2022-07-06 16:42 ` Marc Zyngier
2022-07-06 16:42 ` Marc Zyngier
2022-07-08 19:33 ` Oliver Upton
2022-07-08 19:33 ` Oliver Upton
2022-07-08 19:33 ` Oliver Upton
2022-07-09 6:55 ` Reiji Watanabe
2022-07-09 6:55 ` Reiji Watanabe
2022-07-09 6:55 ` Reiji Watanabe
2022-07-12 7:25 ` Marc Zyngier
2022-07-12 7:25 ` Marc Zyngier
2022-07-12 7:25 ` Marc Zyngier
2022-07-06 16:42 ` [PATCH 06/19] KVM: arm64: Get rid of reg_from/to_user() Marc Zyngier
2022-07-06 16:42 ` Marc Zyngier
2022-07-06 16:42 ` Marc Zyngier
2022-07-08 19:35 ` Oliver Upton
2022-07-08 19:35 ` Oliver Upton
2022-07-08 19:35 ` Oliver Upton
2022-07-12 4:34 ` Reiji Watanabe
2022-07-12 4:34 ` Reiji Watanabe
2022-07-12 4:34 ` Reiji Watanabe
2022-07-06 16:42 ` [PATCH 07/19] KVM: arm64: vgic-v3: Simplify vgic_v3_has_cpu_sysregs_attr() Marc Zyngier
2022-07-06 16:42 ` Marc Zyngier
2022-07-06 16:42 ` Marc Zyngier
2022-07-08 19:38 ` Oliver Upton
2022-07-08 19:38 ` Oliver Upton
2022-07-08 19:38 ` Oliver Upton
2022-07-12 5:22 ` Reiji Watanabe
2022-07-12 5:22 ` Reiji Watanabe
2022-07-12 5:22 ` Reiji Watanabe
2022-07-06 16:42 ` [PATCH 08/19] KVM: arm64: vgic-v3: Push user access into vgic_v3_cpu_sysregs_uaccess() Marc Zyngier
2022-07-06 16:42 ` Marc Zyngier
2022-07-06 16:42 ` Marc Zyngier
2022-07-12 6:11 ` Reiji Watanabe
2022-07-12 6:11 ` Reiji Watanabe
2022-07-12 6:11 ` Reiji Watanabe
2022-07-12 6:52 ` Marc Zyngier
2022-07-12 6:52 ` Marc Zyngier
2022-07-12 6:52 ` Marc Zyngier
2022-07-13 3:26 ` Reiji Watanabe
2022-07-13 3:26 ` Reiji Watanabe
2022-07-13 3:26 ` Reiji Watanabe
2022-07-06 16:42 ` [PATCH 09/19] KVM: arm64: vgic-v3: Make the userspace accessors use sysreg API Marc Zyngier
2022-07-06 16:42 ` Marc Zyngier
2022-07-06 16:42 ` Marc Zyngier
2022-07-13 5:21 ` Reiji Watanabe
2022-07-13 5:21 ` Reiji Watanabe
2022-07-13 5:21 ` Reiji Watanabe
2022-07-06 16:42 ` [PATCH 10/19] KVM: arm64: vgic-v3: Convert userspace accessors over to FIELD_GET/FIELD_PREP Marc Zyngier
2022-07-06 16:42 ` Marc Zyngier
2022-07-06 16:42 ` Marc Zyngier
2022-07-13 5:51 ` Reiji Watanabe [this message]
2022-07-13 5:51 ` Reiji Watanabe
2022-07-13 5:51 ` Reiji Watanabe
2022-07-06 16:42 ` [PATCH 11/19] KVM: arm64: vgic-v3: Use u32 to manage the line level from userspace Marc Zyngier
2022-07-06 16:42 ` Marc Zyngier
2022-07-06 16:42 ` Marc Zyngier
2022-07-13 6:45 ` Reiji Watanabe
2022-07-13 6:45 ` Reiji Watanabe
2022-07-13 6:45 ` Reiji Watanabe
2022-07-06 16:42 ` [PATCH 12/19] KVM: arm64: vgic-v3: Consolidate userspace access for MMIO registers Marc Zyngier
2022-07-06 16:42 ` Marc Zyngier
2022-07-06 16:42 ` Marc Zyngier
2022-07-14 4:11 ` Reiji Watanabe
2022-07-14 4:11 ` Reiji Watanabe
2022-07-14 4:11 ` Reiji Watanabe
2022-07-06 16:42 ` [PATCH 13/19] KVM: arm64: vgic-v2: " Marc Zyngier
2022-07-06 16:42 ` Marc Zyngier
2022-07-06 16:42 ` Marc Zyngier
2022-07-14 4:43 ` Reiji Watanabe
2022-07-14 4:43 ` Reiji Watanabe
2022-07-14 4:43 ` Reiji Watanabe
2022-07-14 7:09 ` Marc Zyngier
2022-07-14 7:09 ` Marc Zyngier
2022-07-14 7:09 ` Marc Zyngier
2022-07-06 16:42 ` [PATCH 14/19] KVM: arm64: vgic: Use {get,put}_user() instead of copy_{from.to}_user Marc Zyngier
2022-07-06 16:42 ` Marc Zyngier
2022-07-06 16:42 ` [PATCH 14/19] KVM: arm64: vgic: Use {get, put}_user() " Marc Zyngier
2022-07-14 5:09 ` Reiji Watanabe
2022-07-14 5:09 ` Reiji Watanabe
2022-07-14 5:09 ` Reiji Watanabe
2022-07-06 16:43 ` [PATCH 15/19] KVM: arm64: vgic-v2: Add helper for legacy dist/cpuif base address setting Marc Zyngier
2022-07-06 16:43 ` Marc Zyngier
2022-07-06 16:43 ` Marc Zyngier
2022-07-14 6:37 ` Reiji Watanabe
2022-07-14 6:37 ` Reiji Watanabe
2022-07-14 6:37 ` Reiji Watanabe
2022-07-14 7:01 ` Marc Zyngier
2022-07-14 7:01 ` Marc Zyngier
2022-07-14 7:01 ` Marc Zyngier
2022-07-15 6:44 ` Reiji Watanabe
2022-07-15 6:44 ` Reiji Watanabe
2022-07-15 6:44 ` Reiji Watanabe
2022-07-06 16:43 ` [PATCH 16/19] KVM: arm64: vgic: Consolidate userspace access for " Marc Zyngier
2022-07-06 16:43 ` Marc Zyngier
2022-07-06 16:43 ` Marc Zyngier
2022-07-06 16:43 ` [PATCH 17/19] KVM: arm64: Get rid of find_reg_by_id() Marc Zyngier
2022-07-06 16:43 ` Marc Zyngier
2022-07-06 16:43 ` Marc Zyngier
2022-07-06 16:43 ` [PATCH 18/19] KVM: arm64: Descope kvm_arm_sys_reg_{get,set}_reg() Marc Zyngier
2022-07-06 16:43 ` Marc Zyngier
2022-07-06 16:43 ` Marc Zyngier
2022-07-06 16:43 ` [PATCH 19/19] KVM: arm64: Get rid or outdated comments Marc Zyngier
2022-07-06 16:43 ` Marc Zyngier
2022-07-06 16:43 ` Marc Zyngier
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