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[2403:580b:97e8:0:82ce:f179:8a79:69f4]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-1f6323e18c7sm62375435ad.177.2024.06.03.04.17.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Jun 2024 04:17:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1717413438; x=1718018238; 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=Ueu7vuYmn8RUHwOpB4gRtq7cx4bSTGY9+BukiSLE2tw=; b=cdeHXTF0/Gl6mSfgosEPYGZrKJawLUCWzQBWz7ZsoxY8+Xl+41qyjiTXHyGEA1srX4 k6RA1D6pgskZcACJEOZhPes8WO0+BHoTME8RqEff67uLrdE7DAkYe8iJOo1SCY+qJJtQ dcESMNv/oFTA9bIsFJdOaX2MPu4VnPANtekn6e6F84votCAWmbpNTctG7MdpFTslHCce xEGoP5kFKAMHIWpT7YL1CHWb1L/iHYxU+GkOvodab0YJPMesk8cl9KFKq0jxdEThCHgr 4w3kQe1Z+o7RBRju4Xj9C99MooCUPG7thfj+arGDw1ii7+UXBoWaciSpDp7kspMUMg5O 6flg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1717413438; x=1718018238; 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=Ueu7vuYmn8RUHwOpB4gRtq7cx4bSTGY9+BukiSLE2tw=; b=rHR9RoFIHgHBb4QPCUEUu5ohhLUcI2VYbjcGEd1T5EB3JOYKJP9pvNoO+L6OmkJVnW 1w4kOIrCVwZx5QMHVmvhofnGB0E4vexqufhSNRYgvs08AkSfrHQCXszfJtfIcBqVUYBe OeJ1sGLSGd7wTIEbiEvJLxs506E4xe8EPRFy2iLpZFaHJytI2HUFvFO9RHNmyF08EuXs XOfmNqN1ebDKBRlJOS8b3XE4rCvsBrs1wBy783b6bB+1tY9VYkZkrfleKSd6LutJOLRv TR/PQIOkwEnB1lDF2p33mfwCPoNNps17JRfc89n3ddRvF9Z+feG10OwpPlVmBaxS4u+f RFXw== X-Gm-Message-State: AOJu0YzI2isPNhNbhVylhohtVXyGPJcDGMPjA1nPqc6Loso71+BmuO5E Xpk+hhe4IF8nMzqEXwfNselxyIw34vOBqc8V/XmbnuN5GgzEzaEgvZdSdQ== X-Google-Smtp-Source: AGHT+IGGmjnUU7lJx8GUg7aSqgCZRwHjM2uwi8I8k0WGt1bt6aDN/aVzSTEEg3Wavs1ucGs3RAGmXA== X-Received: by 2002:a17:903:1c5:b0:1f6:3a73:1eac with SMTP id d9443c01a7336-1f63a7321c2mr105401925ad.17.1717413437912; Mon, 03 Jun 2024 04:17:17 -0700 (PDT) From: Alistair Francis X-Google-Original-From: Alistair Francis To: qemu-devel@nongnu.org Cc: alistair23@gmail.com, Daniel Henrique Barboza , Alistair Francis , LIU Zhiwei Subject: [PULL v2 08/27] target/riscv/debug: set tval=pc in breakpoint exceptions Date: Mon, 3 Jun 2024 21:16:24 +1000 Message-ID: <20240603111643.258712-9-alistair.francis@wdc.com> X-Mailer: git-send-email 2.45.1 In-Reply-To: <20240603111643.258712-1-alistair.francis@wdc.com> References: <20240603111643.258712-1-alistair.francis@wdc.com> 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::62a; envelope-from=alistair23@gmail.com; helo=mail-pl1-x62a.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 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, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham 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 @gmail.com) X-ZM-MESSAGEID: 1717413725109100015 Content-Type: text/plain; charset="utf-8" From: Daniel Henrique Barboza We're not setting (s/m)tval when triggering breakpoints of type 2 (mcontrol) and 6 (mcontrol6). According to the debug spec section 5.7.12, "Match Control Type 6": "The Privileged Spec says that breakpoint exceptions that occur on instruction fetches, loads, or stores update the tval CSR with either zero or the faulting virtual address. The faulting virtual address for an mcontrol6 trigger with action =3D 0 is the address being accessed and which caused that trigger to fire." A similar text is also found in the Debug spec section 5.7.11 w.r.t. mcontrol. Note that what we're doing ATM is not violating the spec, but it's simple enough to set mtval/stval and it makes life easier for any software that relies on this info. Given that we always use action =3D 0, save the faulting address for the mcontrol and mcontrol6 trigger breakpoints into env->badaddr, which is used as as scratch area for traps with address information. 'tval' is then set during riscv_cpu_do_interrupt(). Signed-off-by: Daniel Henrique Barboza Reviewed-by: Alistair Francis Reviewed-by: LIU Zhiwei Message-ID: <20240416230437.1869024-2-dbarboza@ventanamicro.com> Signed-off-by: Alistair Francis --- target/riscv/cpu_helper.c | 1 + target/riscv/debug.c | 3 +++ 2 files changed, 4 insertions(+) diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c index 8ad546a45a..179cf3d1a1 100644 --- a/target/riscv/cpu_helper.c +++ b/target/riscv/cpu_helper.c @@ -1718,6 +1718,7 @@ void riscv_cpu_do_interrupt(CPUState *cs) tval =3D env->bins; break; case RISCV_EXCP_BREAKPOINT: + tval =3D env->badaddr; if (cs->watchpoint_hit) { tval =3D cs->watchpoint_hit->hitaddr; cs->watchpoint_hit =3D NULL; diff --git a/target/riscv/debug.c b/target/riscv/debug.c index e30d99cc2f..b110370ea6 100644 --- a/target/riscv/debug.c +++ b/target/riscv/debug.c @@ -798,6 +798,7 @@ bool riscv_cpu_debug_check_breakpoint(CPUState *cs) if ((ctrl & TYPE2_EXEC) && (bp->pc =3D=3D pc)) { /* check U/S/M bit against current privilege level */ if ((ctrl >> 3) & BIT(env->priv)) { + env->badaddr =3D pc; return true; } } @@ -810,11 +811,13 @@ bool riscv_cpu_debug_check_breakpoint(CPUState *cs) if (env->virt_enabled) { /* check VU/VS bit against current privilege level= */ if ((ctrl >> 23) & BIT(env->priv)) { + env->badaddr =3D pc; return true; } } else { /* check U/S/M bit against current privilege level= */ if ((ctrl >> 3) & BIT(env->priv)) { + env->badaddr =3D pc; return true; } } --=20 2.45.1