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[187.189.51.144]) by smtp.gmail.com with ESMTPSA id c127sm10216240qkd.87.2021.03.14.10.59.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 14 Mar 2021 10:59:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=rHSsmMGgFTbVP+9XKxjAVaBht/aShtydPxFkUYIpqOM=; b=bta5pLlXHGReqLeXRf5hiEZupd2K1+MlcOoAxT2YO1D5AEY6JNpUuVqxD7bdHg/wP6 JgYVHAlhSKq9GmHecFUtct0aGNr40AIVpMc6s41JAjfNqyhyggp9/M0HUPNhSMFQl+uF 4ppLUPkk4vD/Rvt6BCWFy/WCDiEeQnk1KVCRH5WDFX5HPtp7yCvghnQVoZ/9F7YCDnM2 mfLfaoK6VnXN5UoaRUnpoaNQnIYQeZQLejuQAXBD9qfAKg1g1wA7BCDjQqUqMsW7Cddk Jllh143lnkfO8qyme48Nyk3Mt9KPrwR+fUYi4ndv1lSA+bR+qKvb8sQQ415csLRS1j+n H+1Q== 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=rHSsmMGgFTbVP+9XKxjAVaBht/aShtydPxFkUYIpqOM=; b=QWvdiTMrHqKLi68QZxNlK5ztUnbHSOfmWap52RjkrOpGCiK+A1jFhRliJ6SV/K5/WP Vj+KNGgGEgmfzxKhbB4NG4YAeEQGQe/5XpT9a2rVFTrHAM8ehG03B4kkapm/WfxgCfon SDhLsvAuGdMcpiOzA0Rh8FsFPuRopquwjDhvKSBKQhyYkWNVZVqzpiGUtEYs7nxrOkyc XwUZVOX4hNKsV9WNrSBtSHfA0EUCGNXRZlwRKJc90pUzhAFeNA30ABIR16D+4jz2Z6j7 VEu0btskf7e+PpIyCAHuqiPzrapv2NlG8l/r6dBx/8X/bN1YAM1qb/yIoSC7SynKzhzW MkKA== X-Gm-Message-State: AOAM532KRPWoWAct/Mnicuesefk1ZYKkTDKjo4+OEn8ENjtn3WFYV5Ei g82LnWeOf+GexOrKXE3cgFpaEDl5CPFy4rIC X-Google-Smtp-Source: ABdhPJx6cs3lRd0IMX8+og/bCdkTJx6qDmxvV2yBswRdr9MN0y3j6mWbAMSXyWT5o5g/tGQI9ShLuw== X-Received: by 2002:ac8:5b8e:: with SMTP id a14mr19892550qta.189.1615744754950; Sun, 14 Mar 2021 10:59:14 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v3 05/16] target/ppc: Retain hflags_nmsr only for migration Date: Sun, 14 Mar 2021 11:58:55 -0600 Message-Id: <20210314175906.1733746-6-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210314175906.1733746-1-richard.henderson@linaro.org> References: <20210314175906.1733746-1-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::829; envelope-from=richard.henderson@linaro.org; helo=mail-qt1-x829.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: ivan@vmfacility.fr, qemu-ppc@nongnu.org, david@gibson.dropbear.id.au Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" We have eliminated all normal uses of hflags_nmsr. We need not even compute it except when we want to migrate. Rename the field to emphasize this. Remove the fixme comment for migrating access_type. This value is only ever used with the current executing instruction, and is never live when the cpu is halted for migration. Signed-off-by: Richard Henderson --- target/ppc/cpu.h | 4 ++-- target/ppc/helper_regs.c | 2 -- target/ppc/machine.c | 9 ++++++--- 3 files changed, 8 insertions(+), 7 deletions(-) diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h index 061d2eed1b..79c4033a42 100644 --- a/target/ppc/cpu.h +++ b/target/ppc/cpu.h @@ -1105,8 +1105,8 @@ struct CPUPPCState { #endif =20 /* These resources are used only in QEMU core */ - target_ulong hflags; /* hflags is MSR & HFLAGS_MASK */ - target_ulong hflags_nmsr; /* specific hflags, not coming from MSR */ + target_ulong hflags; + target_ulong hflags_compat_nmsr; /* for migration compatibility */ int immu_idx; /* precomputed MMU index to speed up insn accesses */ int dmmu_idx; /* precomputed MMU index to speed up data accesses */ =20 diff --git a/target/ppc/helper_regs.c b/target/ppc/helper_regs.c index 95b9aca61f..a87e354ca2 100644 --- a/target/ppc/helper_regs.c +++ b/target/ppc/helper_regs.c @@ -104,8 +104,6 @@ void hreg_compute_hflags(CPUPPCState *env) */ uint32_t le =3D extract32(env->spr[SPR_HID0], 3, 1); env->hflags |=3D le << MSR_LE; - /* Retain for backward compatibility with migration. */ - env->hflags_nmsr =3D le << MSR_LE; } } =20 diff --git a/target/ppc/machine.c b/target/ppc/machine.c index f6eeda9642..1f7a353c78 100644 --- a/target/ppc/machine.c +++ b/target/ppc/machine.c @@ -310,6 +310,10 @@ static int cpu_pre_save(void *opaque) } } =20 + /* Retain migration compatibility for pre 6.0 for 601 machines. */ + env->hflags_compat_nmsr =3D (env->flags & POWERPC_FLAG_HID0_LE + ? env->hflags & MSR_LE : 0); + return 0; } =20 @@ -829,9 +833,8 @@ const VMStateDescription vmstate_ppc_cpu =3D { /* Supervisor mode architected state */ VMSTATE_UINTTL(env.msr, PowerPCCPU), =20 - /* Internal state */ - VMSTATE_UINTTL(env.hflags_nmsr, PowerPCCPU), - /* FIXME: access_type? */ + /* Backward compatible internal state */ + VMSTATE_UINTTL(env.hflags_compat_nmsr, PowerPCCPU), =20 /* Sanity checking */ VMSTATE_UINTTL_TEST(mig_msr_mask, PowerPCCPU, cpu_pre_2_8_migratio= n), --=20 2.25.1