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Message-ID: <CAJve8ok-Z6VCziFj5t0=BoouZ-VLyGaqEng-dYGTFnP-CR36kw@mail.gmail.com>
Date: Wed, 6 Sep 2023 17:09:20 +0800
From: Haibo Xu <xiaobo55x@...il.com>
To: Andrew Jones <ajones@...tanamicro.com>
Cc: Haibo Xu <haibo1.xu@...el.com>,
Paul Walmsley <paul.walmsley@...ive.com>,
Palmer Dabbelt <palmer@...belt.com>,
Albert Ou <aou@...s.berkeley.edu>,
Paolo Bonzini <pbonzini@...hat.com>,
Shuah Khan <shuah@...nel.org>, Marc Zyngier <maz@...nel.org>,
Oliver Upton <oliver.upton@...ux.dev>,
James Morse <james.morse@....com>,
Suzuki K Poulose <suzuki.poulose@....com>,
Zenghui Yu <yuzenghui@...wei.com>,
Anup Patel <anup@...infault.org>,
Atish Patra <atishp@...shpatra.org>,
Guo Ren <guoren@...nel.org>,
Conor Dooley <conor.dooley@...rochip.com>,
Daniel Henrique Barboza <dbarboza@...tanamicro.com>,
wchen <waylingii@...il.com>,
Sean Christopherson <seanjc@...gle.com>,
Ricardo Koller <ricarkol@...gle.com>,
Vishal Annapurve <vannapurve@...gle.com>,
Vipin Sharma <vipinsh@...gle.com>,
Aaron Lewis <aaronlewis@...gle.com>,
David Matlack <dmatlack@...gle.com>,
Vitaly Kuznetsov <vkuznets@...hat.com>,
Ackerley Tng <ackerleytng@...gle.com>,
Mingwei Zhang <mizhang@...gle.com>,
Lei Wang <lei4.wang@...el.com>,
Maxim Levitsky <mlevitsk@...hat.com>,
Peter Gonda <pgonda@...gle.com>,
Philippe Mathieu-Daudé <philmd@...aro.org>,
Thomas Huth <thuth@...hat.com>, Like Xu <likexu@...cent.com>,
David Woodhouse <dwmw@...zon.co.uk>,
Michal Luczaj <mhal@...x.co>,
zhang songyi <zhang.songyi@....com.cn>,
linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org,
kvm@...r.kernel.org, linux-kselftest@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.linux.dev,
kvm-riscv@...ts.infradead.org
Subject: Re: [PATCH v2 3/8] tools: riscv: Add header file csr.h
On Wed, Sep 6, 2023 at 3:13 PM Andrew Jones <ajones@...tanamicro.com> wrote:
>
> On Wed, Sep 06, 2023 at 02:35:42PM +0800, Haibo Xu wrote:
> > On Mon, Sep 4, 2023 at 9:33 PM Andrew Jones <ajones@...tanamicro.com> wrote:
> > >
> > > On Sat, Sep 02, 2023 at 08:59:25PM +0800, Haibo Xu wrote:
> > > > Borrow the csr definitions and operations from kernel's
> > > > arch/riscv/include/asm/csr.h to tools/ for riscv.
> > > >
> > > > Signed-off-by: Haibo Xu <haibo1.xu@...el.com>
> > > > ---
> > > > tools/arch/riscv/include/asm/csr.h | 521 +++++++++++++++++++++++++++++
> > > > 1 file changed, 521 insertions(+)
> > > > create mode 100644 tools/arch/riscv/include/asm/csr.h
> > > >
> > > > diff --git a/tools/arch/riscv/include/asm/csr.h b/tools/arch/riscv/include/asm/csr.h
> > > > new file mode 100644
> > > > index 000000000000..4e86c82aacbd
> > > > --- /dev/null
> > > > +++ b/tools/arch/riscv/include/asm/csr.h
> > > > @@ -0,0 +1,521 @@
> > > > +/* SPDX-License-Identifier: GPL-2.0-only */
> > > > +/*
> > > > + * Copyright (C) 2015 Regents of the University of California
> > > > + */
> > > > +
> > > > +#ifndef _ASM_RISCV_CSR_H
> > > > +#define _ASM_RISCV_CSR_H
> > > > +
> > > > +#include <linux/bits.h>
> > > > +
> > > > +/* Status register flags */
> > > > +#define SR_SIE _AC(0x00000002, UL) /* Supervisor Interrupt Enable */
> > > > +#define SR_MIE _AC(0x00000008, UL) /* Machine Interrupt Enable */
> > > > +#define SR_SPIE _AC(0x00000020, UL) /* Previous Supervisor IE */
> > > > +#define SR_MPIE _AC(0x00000080, UL) /* Previous Machine IE */
> > > > +#define SR_SPP _AC(0x00000100, UL) /* Previously Supervisor */
> > > > +#define SR_MPP _AC(0x00001800, UL) /* Previously Machine */
> > > > +#define SR_SUM _AC(0x00040000, UL) /* Supervisor User Memory Access */
> > > > +
> > > > +#define SR_FS _AC(0x00006000, UL) /* Floating-point Status */
> > > > +#define SR_FS_OFF _AC(0x00000000, UL)
> > > > +#define SR_FS_INITIAL _AC(0x00002000, UL)
> > > > +#define SR_FS_CLEAN _AC(0x00004000, UL)
> > > > +#define SR_FS_DIRTY _AC(0x00006000, UL)
> > > > +
> > > > +#define SR_VS _AC(0x00000600, UL) /* Vector Status */
> > > > +#define SR_VS_OFF _AC(0x00000000, UL)
> > > > +#define SR_VS_INITIAL _AC(0x00000200, UL)
> > > > +#define SR_VS_CLEAN _AC(0x00000400, UL)
> > > > +#define SR_VS_DIRTY _AC(0x00000600, UL)
> > > > +
> > > > +#define SR_XS _AC(0x00018000, UL) /* Extension Status */
> > > > +#define SR_XS_OFF _AC(0x00000000, UL)
> > > > +#define SR_XS_INITIAL _AC(0x00008000, UL)
> > > > +#define SR_XS_CLEAN _AC(0x00010000, UL)
> > > > +#define SR_XS_DIRTY _AC(0x00018000, UL)
> > > > +
> > > > +#define SR_FS_VS (SR_FS | SR_VS) /* Vector and Floating-Point Unit */
> > > > +
> > > > +#ifndef CONFIG_64BIT
> > >
> > > How do we ensure CONFIG_64BIT is set?
> > >
> >
> > Currently, no explicit checking for this.
> > Shall we add a gatekeeper in this file to ensure it is set?
>
> Not in this file, since this file is shared by all the tools and...
>
> >
> > #ifndef CONFIG_64BIT
> > #error "CONFIG_64BIT was not set"
> > #endif
>
> ...we'll surely hit this error right now since nothing is setting
> CONFIG_64BIT when compiling KVM selftests.
>
> We need to define CONFIG_64BIT in the build somewhere prior to any
> headers which depend on it being included. Maybe we can simply
> add -DCONFIG_64BIT to CFLAGS, since all KVM selftests supported
> architectures are 64-bit.
>
Make sense! Another option can be just add "#define CONFIG_64BIT" at
the begin of csr.h
> (Please trim emails, as I've been doing, when discussing specific parts.)
>
Sure, thanks for the suggestions!
> Thanks,
> drew
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