From: Conor Dooley <conor@kernel.org>
To: Andy Chiu <andy.chiu@sifive.com>
Cc: linux-riscv@lists.infradead.org, palmer@dabbelt.com,
anup@brainfault.org, atishp@atishpatra.org,
kvm-riscv@lists.infradead.org, kvm@vger.kernel.org,
vineetg@rivosinc.com, greentime.hu@sifive.com,
guoren@linux.alibaba.com, Vincent Chen <vincent.chen@sifive.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Albert Ou <aou@eecs.berkeley.edu>, Guo Ren <guoren@kernel.org>,
Richard Henderson <richard.henderson@linaro.org>
Subject: Re: [PATCH -next v13 08/19] riscv: Introduce struct/helpers to save/restore per-task Vector state
Date: Thu, 26 Jan 2023 21:32:15 +0000 [thread overview]
Message-ID: <Y9LxXwzaDDS/Ny7F@spud> (raw)
In-Reply-To: <20230125142056.18356-9-andy.chiu@sifive.com>
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On Wed, Jan 25, 2023 at 02:20:45PM +0000, Andy Chiu wrote:
> From: Greentime Hu <greentime.hu@sifive.com>
>
> Add vector state context struct to be added later in thread_struct. And
> prepare low-level helper functions to save/restore vector contexts.
>
> This include Vector Regfile and CSRs holding dynamic configuration state
> (vstart, vl, vtype, vcsr). The Vec Register width could be implementation
> defined, but same for all processes, so that is saved separately.
>
> This is not yet wired into final thread_struct - will be done when
> __switch_to actually starts doing this in later patches.
>
> Given the variable (and potentially large) size of regfile, they are
> saved in dynamically allocated memory, pointed to by datap pointer in
> __riscv_v_state.
>
> Co-developed-by: Vincent Chen <vincent.chen@sifive.com>
> Signed-off-by: Vincent Chen <vincent.chen@sifive.com>
> Signed-off-by: Greentime Hu <greentime.hu@sifive.com>
> Signed-off-by: Vineet Gupta <vineetg@rivosinc.com>
> [vineetg: merged bits from 2 different patches]
> Signed-off-by: Andy Chiu <andy.chiu@sifive.com>
> [andy.chiu: use inline asm to save/restore context, remove asm vaiant]
> ---
> arch/riscv/include/asm/vector.h | 84 ++++++++++++++++++++++++++++
> arch/riscv/include/uapi/asm/ptrace.h | 17 ++++++
> 2 files changed, 101 insertions(+)
>
> diff --git a/arch/riscv/include/asm/vector.h b/arch/riscv/include/asm/vector.h
> index 16cb4a1c1230..842a859609b5 100644
> --- a/arch/riscv/include/asm/vector.h
> +++ b/arch/riscv/include/asm/vector.h
> @@ -12,6 +12,9 @@
>
> #include <asm/hwcap.h>
> #include <asm/csr.h>
> +#include <asm/asm.h>
> +
> +#define CSR_STR(x) __ASM_STR(x)
>
> extern unsigned long riscv_vsize;
>
> @@ -20,6 +23,26 @@ static __always_inline bool has_vector(void)
> return static_branch_likely(&riscv_isa_ext_keys[RISCV_ISA_EXT_KEY_VECTOR]);
> }
>
> +static inline void __vstate_clean(struct pt_regs *regs)
Consistent prefixes here too please, riscv_v_vstate_clean() or similar
and so on for the rest of the patch.
Thanks,
Conor.
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next prev parent reply other threads:[~2023-01-26 21:32 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-25 14:20 [PATCH -next v13 00/19] riscv: Add vector ISA support Andy Chiu
2023-01-25 14:20 ` [PATCH -next v13 01/19] riscv: Rename __switch_to_aux -> fpu Andy Chiu
2023-01-25 21:15 ` Conor Dooley
2023-01-25 14:20 ` [PATCH -next v13 02/19] riscv: Extending cpufeature.c to detect V-extension Andy Chiu
2023-01-25 21:33 ` Conor Dooley
2023-01-28 7:09 ` Guo Ren
2023-01-28 10:28 ` Conor Dooley
2023-01-25 14:20 ` [PATCH -next v13 03/19] riscv: Add new csr defines related to vector extension Andy Chiu
2023-01-25 22:16 ` Conor Dooley
2023-01-25 14:20 ` [PATCH -next v13 04/19] riscv: Clear vector regfile on bootup Andy Chiu
2023-01-25 21:54 ` Conor Dooley
2023-01-25 21:57 ` Vineet Gupta
2023-01-25 22:18 ` Conor Dooley
2023-01-25 14:20 ` [PATCH -next v13 05/19] riscv: Disable Vector Instructions for kernel itself Andy Chiu
2023-01-25 21:51 ` Conor Dooley
2023-01-25 14:20 ` [PATCH -next v13 06/19] riscv: Introduce Vector enable/disable helpers Andy Chiu
2023-01-26 21:06 ` Conor Dooley
2023-01-25 14:20 ` [PATCH -next v13 07/19] riscv: Introduce riscv_vsize to record size of Vector context Andy Chiu
2023-01-26 21:24 ` Conor Dooley
2023-01-25 14:20 ` [PATCH -next v13 08/19] riscv: Introduce struct/helpers to save/restore per-task Vector state Andy Chiu
2023-01-26 21:32 ` Conor Dooley [this message]
2023-01-25 14:20 ` [PATCH -next v13 09/19] riscv: Add task switch support for vector Andy Chiu
2023-01-26 21:44 ` Conor Dooley
2023-01-31 2:55 ` Vineet Gupta
2023-01-25 14:20 ` [PATCH -next v13 10/19] riscv: Allocate user's vector context in the first-use trap Andy Chiu
2023-01-26 23:11 ` Conor Dooley
2023-02-06 12:00 ` Andy Chiu
2023-02-06 13:40 ` Conor Dooley
2023-02-10 12:00 ` Andy Chiu
2023-02-07 14:36 ` Björn Töpel
2023-02-13 22:54 ` Vineet Gupta
2023-02-14 6:43 ` Björn Töpel
2023-02-14 15:36 ` Andy Chiu
2023-02-14 16:50 ` Björn Töpel
2023-02-14 17:24 ` Vineet Gupta
2023-02-15 7:14 ` Björn Töpel
2023-02-15 14:39 ` Andy Chiu
2023-02-07 21:18 ` Vineet Gupta
2023-02-08 9:20 ` Björn Töpel
2023-01-25 14:20 ` [PATCH -next v13 11/19] riscv: Add ptrace vector support Andy Chiu
2023-01-25 14:20 ` [PATCH -next v13 12/19] riscv: signal: check fp-reserved words unconditionally Andy Chiu
2023-01-25 14:20 ` [PATCH -next v13 13/19] riscv: signal: Add sigcontext save/restore for vector Andy Chiu
2023-01-25 14:20 ` [PATCH -next v13 14/19] riscv: signal: Report signal frame size to userspace via auxv Andy Chiu
2023-01-26 23:19 ` Conor Dooley
2023-01-31 12:34 ` Andy Chiu
2023-01-25 14:20 ` [PATCH -next v13 15/19] riscv: Fix a kernel panic issue if $s2 is set to a specific value before entering Linux Andy Chiu
2023-01-27 20:31 ` Conor Dooley
2023-01-31 12:34 ` Andy Chiu
2023-01-25 14:20 ` [PATCH -next v13 16/19] riscv: Add V extension to KVM ISA Andy Chiu
2023-01-27 20:43 ` Conor Dooley
2023-01-30 9:58 ` Andy Chiu
2023-01-25 14:20 ` [PATCH -next v13 17/19] riscv: KVM: Add vector lazy save/restore support Andy Chiu
2023-01-25 14:20 ` [PATCH -next v13 18/19] riscv: kvm: redirect illegal instruction traps to guests Andy Chiu
2023-01-27 11:28 ` Anup Patel
2023-01-30 8:18 ` Andy Chiu
2023-01-25 14:20 ` [PATCH -next v13 19/19] riscv: Enable Vector code to be built Andy Chiu
2023-01-25 21:04 ` Conor Dooley
2023-01-25 21:38 ` Jessica Clarke
2023-01-25 22:24 ` Conor Dooley
2023-01-30 6:38 ` Andy Chiu
2023-01-30 18:38 ` Vineet Gupta
2023-01-30 7:46 ` Andy Chiu
2023-01-30 8:13 ` Conor Dooley
2023-02-08 18:19 ` Conor Dooley
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