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[174.21.76.141]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-70b438f5679sm2687280b3a.90.2024.07.09.20.28.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 09 Jul 2024 20:28:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1720582100; x=1721186900; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=sb62XWFDa9Gh05Ca0jxdQeAaMaUiQWBTgpRySguRiT4=; b=LPpU++pfEDsPqHCSHfgECniQSRYYT6Ll+4OuFGhVGdriXQinohYfIxOXxlVDVTkeM1 8fy8Hfu/fmwHfVZL4KOGXq3FKCd0zTK28iLOcg0GTL7WvY2TWjXPAM1atrHSPgoxab2Q v9xa716IvRE5V1uURP8QMLXYCSwbYjQ+ER6topnnFqaq58/FPk2oW3n9qRvWoJ2ecYZz ZhzR+Em5eDQ91q20t3rqjPZI+suAdOrIslmAl+GveoEOrUrHVWtwL5sms6nMsRMRj6kA odrMgsgy65vdJL9pr5cRdWYDMpMTBrutbzQrWfzyTQx1tZRIPdPaGZxx6cvfNwahKRve WaXg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1720582100; x=1721186900; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=sb62XWFDa9Gh05Ca0jxdQeAaMaUiQWBTgpRySguRiT4=; b=gEYSsGtBQgIVgXie3SsRCm+PvSbuEJIs5a1mBhrgYaop/5bhAFSp3/YqX4GloM+QWq CopUcmbGV+VIOClaW2lAnoNIdaVhCd1wyqRvZ2g8Sk+Sg7DfNlNdabwdZ4omc1rWxf+0 FaLQeIoOENffPDk3/lmDHE3ZFbP4/npK7CmGBIvQiTf+NTwVIOo1plq8IsFkC3r4Q4bJ 8Jp6JvyISzKWOP1BZ10m6CXCFkQGPluXDUB2nSgpAGRspBDXPCulP50HdEauPGU6oRDQ h6ATXsjKd/HhadhSunVdyxoN7jg9/Xc+ilcT7xYABUtnHrgo5iTdP+YTcwMBlmSUqSrf +5fg== X-Gm-Message-State: AOJu0Yzbth2zkvWD2KhjMmNNz9Mgd7mkFlw+NJUpXNZtWawp1ZLfNtGT PyxU4feDsT4J1uE+rVjBIhUbpZBXExLqYewJSx/U8gOZg78B8YcnI09fkzoUCkII2X+5sjWC65/ 6DIA= X-Google-Smtp-Source: AGHT+IGeuI6x01YqqLWdGbry7s1eRKV87b7Ie0UuYSmJs7eHAfCrppAtzwxRD9i52UpxfwIcm7MWLQ== X-Received: by 2002:a9d:66d6:0:b0:704:45b5:6464 with SMTP id 46e09a7af769-70445b56aafmr2493074a34.29.1720582100227; Tue, 09 Jul 2024 20:28:20 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: qemu-arm@nongnu.org, qemu-ppc@nongu.org, qemu-s390x@nongnu.org, qemu-riscv@nongnu.org, balaton@eik.bme.hu, max.chou@sifive.com Subject: [PATCH v2 04/13] target/arm: Use set/clear_helper_retaddr in SVE and SME helpers Date: Tue, 9 Jul 2024 20:28:05 -0700 Message-ID: <20240710032814.104643-5-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240710032814.104643-1-richard.henderson@linaro.org> References: <20240710032814.104643-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::333; envelope-from=richard.henderson@linaro.org; helo=mail-ot1-x333.google.com X-Spam_score_int: 4 X-Spam_score: 0.4 X-Spam_bar: / X-Spam_report: (0.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, SUSPICIOUS_RECIPS=2.51 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1720582272138116600 Content-Type: text/plain; charset="utf-8" Avoid a race condition with munmap in another thread. Use around blocks that exclusively use "host_fn". Keep the blocks as small as possible, but without setting and clearing for every operation on one page. Signed-off-by: Richard Henderson --- target/arm/tcg/sme_helper.c | 16 ++++++++++++++++ target/arm/tcg/sve_helper.c | 26 ++++++++++++++++++++++++++ 2 files changed, 42 insertions(+) diff --git a/target/arm/tcg/sme_helper.c b/target/arm/tcg/sme_helper.c index e2e0575039..ab40ced38f 100644 --- a/target/arm/tcg/sme_helper.c +++ b/target/arm/tcg/sme_helper.c @@ -517,6 +517,8 @@ void sme_ld1(CPUARMState *env, void *za, uint64_t *vg, clr_fn(za, 0, reg_off); } =20 + set_helper_retaddr(ra); + while (reg_off <=3D reg_last) { uint64_t pg =3D vg[reg_off >> 6]; do { @@ -529,6 +531,8 @@ void sme_ld1(CPUARMState *env, void *za, uint64_t *vg, } while (reg_off <=3D reg_last && (reg_off & 63)); } =20 + clear_helper_retaddr(); + /* * Use the slow path to manage the cross-page misalignment. * But we know this is RAM and cannot trap. @@ -543,6 +547,8 @@ void sme_ld1(CPUARMState *env, void *za, uint64_t *vg, reg_last =3D info.reg_off_last[1]; host =3D info.page[1].host; =20 + set_helper_retaddr(ra); + do { uint64_t pg =3D vg[reg_off >> 6]; do { @@ -554,6 +560,8 @@ void sme_ld1(CPUARMState *env, void *za, uint64_t *vg, reg_off +=3D esize; } while (reg_off & 63); } while (reg_off <=3D reg_last); + + clear_helper_retaddr(); } } =20 @@ -701,6 +709,8 @@ void sme_st1(CPUARMState *env, void *za, uint64_t *vg, reg_last =3D info.reg_off_last[0]; host =3D info.page[0].host; =20 + set_helper_retaddr(ra); + while (reg_off <=3D reg_last) { uint64_t pg =3D vg[reg_off >> 6]; do { @@ -711,6 +721,8 @@ void sme_st1(CPUARMState *env, void *za, uint64_t *vg, } while (reg_off <=3D reg_last && (reg_off & 63)); } =20 + clear_helper_retaddr(); + /* * Use the slow path to manage the cross-page misalignment. * But we know this is RAM and cannot trap. @@ -725,6 +737,8 @@ void sme_st1(CPUARMState *env, void *za, uint64_t *vg, reg_last =3D info.reg_off_last[1]; host =3D info.page[1].host; =20 + set_helper_retaddr(ra); + do { uint64_t pg =3D vg[reg_off >> 6]; do { @@ -734,6 +748,8 @@ void sme_st1(CPUARMState *env, void *za, uint64_t *vg, reg_off +=3D 1 << esz; } while (reg_off & 63); } while (reg_off <=3D reg_last); + + clear_helper_retaddr(); } } =20 diff --git a/target/arm/tcg/sve_helper.c b/target/arm/tcg/sve_helper.c index dd49e67d7a..8d0af4bb1c 100644 --- a/target/arm/tcg/sve_helper.c +++ b/target/arm/tcg/sve_helper.c @@ -5738,6 +5738,8 @@ void sve_ldN_r(CPUARMState *env, uint64_t *vg, const = target_ulong addr, reg_last =3D info.reg_off_last[0]; host =3D info.page[0].host; =20 + set_helper_retaddr(retaddr); + while (reg_off <=3D reg_last) { uint64_t pg =3D vg[reg_off >> 6]; do { @@ -5752,6 +5754,8 @@ void sve_ldN_r(CPUARMState *env, uint64_t *vg, const = target_ulong addr, } while (reg_off <=3D reg_last && (reg_off & 63)); } =20 + clear_helper_retaddr(); + /* * Use the slow path to manage the cross-page misalignment. * But we know this is RAM and cannot trap. @@ -5771,6 +5775,8 @@ void sve_ldN_r(CPUARMState *env, uint64_t *vg, const = target_ulong addr, reg_last =3D info.reg_off_last[1]; host =3D info.page[1].host; =20 + set_helper_retaddr(retaddr); + do { uint64_t pg =3D vg[reg_off >> 6]; do { @@ -5784,6 +5790,8 @@ void sve_ldN_r(CPUARMState *env, uint64_t *vg, const = target_ulong addr, mem_off +=3D N << msz; } while (reg_off & 63); } while (reg_off <=3D reg_last); + + clear_helper_retaddr(); } } =20 @@ -6093,6 +6101,8 @@ void sve_ldnfff1_r(CPUARMState *env, void *vg, const = target_ulong addr, reg_last =3D info.reg_off_last[0]; host =3D info.page[0].host; =20 + set_helper_retaddr(retaddr); + do { uint64_t pg =3D *(uint64_t *)(vg + (reg_off >> 3)); do { @@ -6113,6 +6123,8 @@ void sve_ldnfff1_r(CPUARMState *env, void *vg, const = target_ulong addr, } while (reg_off <=3D reg_last && (reg_off & 63)); } while (reg_off <=3D reg_last); =20 + clear_helper_retaddr(); + /* * MemSingleNF is allowed to fail for any reason. We have special * code above to handle the first element crossing a page boundary. @@ -6348,6 +6360,8 @@ void sve_stN_r(CPUARMState *env, uint64_t *vg, target= _ulong addr, reg_last =3D info.reg_off_last[0]; host =3D info.page[0].host; =20 + set_helper_retaddr(retaddr); + while (reg_off <=3D reg_last) { uint64_t pg =3D vg[reg_off >> 6]; do { @@ -6362,6 +6376,8 @@ void sve_stN_r(CPUARMState *env, uint64_t *vg, target= _ulong addr, } while (reg_off <=3D reg_last && (reg_off & 63)); } =20 + clear_helper_retaddr(); + /* * Use the slow path to manage the cross-page misalignment. * But we know this is RAM and cannot trap. @@ -6381,6 +6397,8 @@ void sve_stN_r(CPUARMState *env, uint64_t *vg, target= _ulong addr, reg_last =3D info.reg_off_last[1]; host =3D info.page[1].host; =20 + set_helper_retaddr(retaddr); + do { uint64_t pg =3D vg[reg_off >> 6]; do { @@ -6394,6 +6412,8 @@ void sve_stN_r(CPUARMState *env, uint64_t *vg, target= _ulong addr, mem_off +=3D N << msz; } while (reg_off & 63); } while (reg_off <=3D reg_last); + + clear_helper_retaddr(); } } =20 @@ -6560,7 +6580,9 @@ void sve_ld1_z(CPUARMState *env, void *vd, uint64_t *= vg, void *vm, if (unlikely(info.flags & TLB_MMIO)) { tlb_fn(env, &scratch, reg_off, addr, retaddr); } else { + set_helper_retaddr(retaddr); host_fn(&scratch, reg_off, info.host); + clear_helper_retaddr(); } } else { /* Element crosses the page boundary. */ @@ -6782,7 +6804,9 @@ void sve_ldff1_z(CPUARMState *env, void *vd, uint64_t= *vg, void *vm, goto fault; } =20 + set_helper_retaddr(retaddr); host_fn(vd, reg_off, info.host); + clear_helper_retaddr(); } reg_off +=3D esize; } while (reg_off & 63); @@ -6986,7 +7010,9 @@ void sve_st1_z(CPUARMState *env, void *vd, uint64_t *= vg, void *vm, do { void *h =3D host[i]; if (likely(h !=3D NULL)) { + set_helper_retaddr(retaddr); host_fn(vd, reg_off, h); + clear_helper_retaddr(); } else if ((vg[reg_off >> 6] >> (reg_off & 63)) & 1) { target_ulong addr =3D base + (off_fn(vm, reg_off) << scale); tlb_fn(env, vd, reg_off, addr, retaddr); --=20 2.43.0