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[5.71.162.151]) by smtp.gmail.com with ESMTPSA id u23sm4096078wmc.32.2020.11.11.13.52.47 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 11 Nov 2020 13:52:47 -0800 (PST) X-Outflank-Mailman: Message body and most headers restored to incoming version X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 88650103-95b8-4958-818b-9ac90130e790 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=7RO1fbeEEFsgd7lyDUOy1fpofsP4z9rSI0cQwzw9Kvk=; b=KO+deDdjmc/oIfnFnkk3fe+ng2FQbdeGxiyUjiaBsxgdLFHgEZfW0cBBc135s2SxXl 1+IUMKZ+bZCMZgHcX6+nOdZRGaRP5pooOtM+7omdkkXli0MzIp/Un1DJiwX1huQXRmcX aUbENgTHvbXOKP1nDXajqDDAoQvPjMeAlQdfreEpiexg+zIQ6YseOWaXyJ+Edj2r/ja8 cY+5WDdHi4w4ugZEJGjizRia200NjurxQf/P1CheLezL7usvcI+CV2GHRHc+tOVnmlze 0x3lC1yZDjH6FiPaGGBP53gcMIjlFD0yUVTcciGnsrjqMorwWt56ULf/DCb7bGhy+2bp rwLA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=7RO1fbeEEFsgd7lyDUOy1fpofsP4z9rSI0cQwzw9Kvk=; b=mlPOxeKLlU2MzjVntzXUs80VxXseK6kouLhVS7pCAMmmQs8BDYydpsFZU/Zw7jn6G/ maDJ3TpaauaiSOXO0cugar0yPMl7LndnC+qLq6YsGFAP5plsGqOmVZnWpxor+F0NSCBw ZAInjPM+7ZJUDqaKJtvFQ3/A4QX2QNHF9LQzjjnXJOdnXC7/ulw6zpDWDSo7Xmud6P0x ae0KLtkAIXgThY9HH2wSpFhPWy7gR4eiiCmvlncUMEJhXVjMQ4npHO2nFAomejeNjSc8 o9oC6pxWbDqGnOwwvdCQA/rNYRhrrcpnWcSrWeNUHF/1xYlIbEw9ltrLvgHws+lHvAYA tyUQ== X-Gm-Message-State: AOAM530NjQwd6uB4woP1+4nhZAX4/TEQnKWr+SlRz7kw2zoewhbM/Ea0 +bE/5hinp+U+5s30l3XmdXmIQVkTV0I= X-Google-Smtp-Source: ABdhPJzYqOUBmnW7c4C8WSAck44Yq++828fMpKee3j+Rd+usbytDU7wpgVgP8fBYmcQw2YmLWOtZwQ== X-Received: by 2002:adf:d84b:: with SMTP id k11mr15840677wrl.305.1605131568233; Wed, 11 Nov 2020 13:52:48 -0800 (PST) From: Ash Wilding X-Google-Original-From: Ash Wilding To: xen-devel@lists.xenproject.org Cc: Ash Wilding , julien@xen.org, bertrand.marquis@arm.com, rahul.singh@arm.com Subject: [RFC PATCH v2 08/15] xen/arm64: port Linux's arm64 atomic_ll_sc.h to Xen Date: Wed, 11 Nov 2020 21:51:56 +0000 Message-Id: <20201111215203.80336-9-ash.j.wilding@gmail.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20201111215203.80336-1-ash.j.wilding@gmail.com> References: <20201111215203.80336-1-ash.j.wilding@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @gmail.com) Content-Type: text/plain; charset="utf-8" From: Ash Wilding Most of the "work" here is simply deleting the atomic64_t helper definitions as we don't have an atomic64_t type in Xen. Signed-off-by: Ash Wilding --- xen/include/asm-arm/arm64/atomic_ll_sc.h | 134 +---------------------- 1 file changed, 6 insertions(+), 128 deletions(-) diff --git a/xen/include/asm-arm/arm64/atomic_ll_sc.h b/xen/include/asm-arm= /arm64/atomic_ll_sc.h index e1009c0f94..20b0cb174e 100644 --- a/xen/include/asm-arm/arm64/atomic_ll_sc.h +++ b/xen/include/asm-arm/arm64/atomic_ll_sc.h @@ -1,16 +1,16 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ /* - * Based on arch/arm/include/asm/atomic.h + * Taken from Linux 5.10-rc2 (last commit 3cea11cd5) * * Copyright (C) 1996 Russell King. * Copyright (C) 2002 Deep Blue Solutions Ltd. * Copyright (C) 2012 ARM Ltd. + * SPDX-License-Identifier: GPL-2.0-only */ =20 -#ifndef __ASM_ATOMIC_LL_SC_H -#define __ASM_ATOMIC_LL_SC_H +#ifndef __ASM_ARM_ARM64_ATOMIC_LL_SC_H +#define __ASM_ARM_ARM64_ATOMIC_LL_SC_H =20 -#include +#include =20 #ifdef CONFIG_ARM64_LSE_ATOMICS #define __LL_SC_FALLBACK(asm_ops) \ @@ -134,128 +134,6 @@ ATOMIC_OPS(andnot, bic, ) #undef ATOMIC_OP_RETURN #undef ATOMIC_OP =20 -#define ATOMIC64_OP(op, asm_op, constraint) \ -static inline void \ -__ll_sc_atomic64_##op(s64 i, atomic64_t *v) \ -{ \ - s64 result; \ - unsigned long tmp; \ - \ - asm volatile("// atomic64_" #op "\n" \ - __LL_SC_FALLBACK( \ -" prfm pstl1strm, %2\n" \ -"1: ldxr %0, %2\n" \ -" " #asm_op " %0, %0, %3\n" \ -" stxr %w1, %0, %2\n" \ -" cbnz %w1, 1b") \ - : "=3D&r" (result), "=3D&r" (tmp), "+Q" (v->counter) \ - : __stringify(constraint) "r" (i)); \ -} - -#define ATOMIC64_OP_RETURN(name, mb, acq, rel, cl, op, asm_op, constraint)\ -static inline long \ -__ll_sc_atomic64_##op##_return##name(s64 i, atomic64_t *v) \ -{ \ - s64 result; \ - unsigned long tmp; \ - \ - asm volatile("// atomic64_" #op "_return" #name "\n" \ - __LL_SC_FALLBACK( \ -" prfm pstl1strm, %2\n" \ -"1: ld" #acq "xr %0, %2\n" \ -" " #asm_op " %0, %0, %3\n" \ -" st" #rel "xr %w1, %0, %2\n" \ -" cbnz %w1, 1b\n" \ -" " #mb ) \ - : "=3D&r" (result), "=3D&r" (tmp), "+Q" (v->counter) \ - : __stringify(constraint) "r" (i) \ - : cl); \ - \ - return result; \ -} - -#define ATOMIC64_FETCH_OP(name, mb, acq, rel, cl, op, asm_op, constraint)\ -static inline long \ -__ll_sc_atomic64_fetch_##op##name(s64 i, atomic64_t *v) \ -{ \ - s64 result, val; \ - unsigned long tmp; \ - \ - asm volatile("// atomic64_fetch_" #op #name "\n" \ - __LL_SC_FALLBACK( \ -" prfm pstl1strm, %3\n" \ -"1: ld" #acq "xr %0, %3\n" \ -" " #asm_op " %1, %0, %4\n" \ -" st" #rel "xr %w2, %1, %3\n" \ -" cbnz %w2, 1b\n" \ -" " #mb ) \ - : "=3D&r" (result), "=3D&r" (val), "=3D&r" (tmp), "+Q" (v->counter) \ - : __stringify(constraint) "r" (i) \ - : cl); \ - \ - return result; \ -} - -#define ATOMIC64_OPS(...) \ - ATOMIC64_OP(__VA_ARGS__) \ - ATOMIC64_OP_RETURN(, dmb ish, , l, "memory", __VA_ARGS__) \ - ATOMIC64_OP_RETURN(_relaxed,, , , , __VA_ARGS__) \ - ATOMIC64_OP_RETURN(_acquire,, a, , "memory", __VA_ARGS__) \ - ATOMIC64_OP_RETURN(_release,, , l, "memory", __VA_ARGS__) \ - ATOMIC64_FETCH_OP (, dmb ish, , l, "memory", __VA_ARGS__) \ - ATOMIC64_FETCH_OP (_relaxed,, , , , __VA_ARGS__) \ - ATOMIC64_FETCH_OP (_acquire,, a, , "memory", __VA_ARGS__) \ - ATOMIC64_FETCH_OP (_release,, , l, "memory", __VA_ARGS__) - -ATOMIC64_OPS(add, add, I) -ATOMIC64_OPS(sub, sub, J) - -#undef ATOMIC64_OPS -#define ATOMIC64_OPS(...) \ - ATOMIC64_OP(__VA_ARGS__) \ - ATOMIC64_FETCH_OP (, dmb ish, , l, "memory", __VA_ARGS__) \ - ATOMIC64_FETCH_OP (_relaxed,, , , , __VA_ARGS__) \ - ATOMIC64_FETCH_OP (_acquire,, a, , "memory", __VA_ARGS__) \ - ATOMIC64_FETCH_OP (_release,, , l, "memory", __VA_ARGS__) - -ATOMIC64_OPS(and, and, L) -ATOMIC64_OPS(or, orr, L) -ATOMIC64_OPS(xor, eor, L) -/* - * GAS converts the mysterious and undocumented BIC (immediate) alias to - * an AND (immediate) instruction with the immediate inverted. We don't - * have a constraint for this, so fall back to register. - */ -ATOMIC64_OPS(andnot, bic, ) - -#undef ATOMIC64_OPS -#undef ATOMIC64_FETCH_OP -#undef ATOMIC64_OP_RETURN -#undef ATOMIC64_OP - -static inline s64 -__ll_sc_atomic64_dec_if_positive(atomic64_t *v) -{ - s64 result; - unsigned long tmp; - - asm volatile("// atomic64_dec_if_positive\n" - __LL_SC_FALLBACK( -" prfm pstl1strm, %2\n" -"1: ldxr %0, %2\n" -" subs %0, %0, #1\n" -" b.lt 2f\n" -" stlxr %w1, %0, %2\n" -" cbnz %w1, 1b\n" -" dmb ish\n" -"2:") - : "=3D&r" (result), "=3D&r" (tmp), "+Q" (v->counter) - : - : "cc", "memory"); - - return result; -} - #define __CMPXCHG_CASE(w, sfx, name, sz, mb, acq, rel, cl, constraint) \ static inline u##sz \ __ll_sc__cmpxchg_case_##name##sz(volatile void *ptr, \ @@ -350,4 +228,4 @@ __CMPXCHG_DBL(_mb, dmb ish, l, "memory") #undef __CMPXCHG_DBL #undef K =20 -#endif /* __ASM_ATOMIC_LL_SC_H */ \ No newline at end of file +#endif /* __ASM_ARM_ARM64_ATOMIC_LL_SC_H */ \ No newline at end of file --=20 2.24.3 (Apple Git-128)