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[124.169.110.219]) by smtp.gmail.com with ESMTPSA id h22sm15055171pfn.55.2021.05.26.02.16.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 26 May 2021 02:16:42 -0700 (PDT) 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=kOHAbEzZ0rp5rLYGoHSACEChJTJyO3dBSHm5NkBx8ME=; b=oV15o0Vxbtr+ejH0E/9Q3EI9pP19GYY3zdTT3VeBMhlo3bwo8SWsZDNXZNs/5gmyeV PI9GP+HYGfLX0WZM0SHLntr6O61H2+BOVTKjhPBI6rSsEykh/Du3mHbV/3AbQiE4r383 qi1IrwJloVBaeQgQgsN5xWvqljktKMFfUVcdmK60vchOqD2ajDBM5MRfcFSUgmoiu+VS AVJp8eYmIKNPAPukObHG9rPMANeQ/X02g/fmsGLRi3HOVH2nqOW6j9lcZIOakThtVVDv uF/PAeBmlBDHU4eUun5Gj/5+ktMOsTxs1IzxQirUZI0M4kb2BIxjoL65MbkhWgvg4NuK CKSw== 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=kOHAbEzZ0rp5rLYGoHSACEChJTJyO3dBSHm5NkBx8ME=; b=rDU4y2LlFKpqTTwS8ntu8P0EBqhH5CkUOUu/ZuVD+ZGkTrX91w0xTbLUpLAL//9IpU mQaOyB37gm0zGQo9ojriItmFv2Y0DhfyKWodJIHYbfYWUJkm8JY8ir1eyTGXZV1EyOh4 DJdUffcKROpniVEKeYeGzjq/8oLs2DhdIdRX/VE3f7nl7Xi2it8KPFz8iublouspioT6 p2cYGJFFWE5hJzgpEJWNMhOj9fkB40orqNqUKjlrKdh2s3vRLzeUB80VlHUE86DVbBXh f75fqr1N/fbjf8cB9suacs5SDIgS9ZsDKY8IcmrmWHKAagxgx5Chp61zNjmlaMDebNS3 WbJg== X-Gm-Message-State: AOAM5322xQLAWu6EZmFfhIU73Sx5vzTnG9Lgr8DfV+jwSimVsnsoYue4 3/v6jBF+pBQ6ujNDsIFDXuphnHL5JWDMQw== X-Google-Smtp-Source: ABdhPJwoHOpJJvzymGWkmiLDjzYo/6g6fNI+V0sD82AnIpFVFlJq1VaO6EsQgg4SODyZRwqGEpZ8nA== X-Received: by 2002:a62:b40c:0:b029:2de:4a1e:a753 with SMTP id h12-20020a62b40c0000b02902de4a1ea753mr34253657pfn.64.1622020602788; Wed, 26 May 2021 02:16:42 -0700 (PDT) From: Nicholas Piggin To: qemu-ppc@nongnu.org Subject: [PATCH v1 2/3] spapr: Set LPCR to current AIL mode when starting a new CPU Date: Wed, 26 May 2021 19:16:25 +1000 Message-Id: <20210526091626.3388262-3-npiggin@gmail.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20210526091626.3388262-1-npiggin@gmail.com> References: <20210526091626.3388262-1-npiggin@gmail.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::52d; envelope-from=npiggin@gmail.com; helo=mail-pg1-x52d.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, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham 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: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , qemu-devel@nongnu.org, Nicholas Piggin , David Gibson 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" TCG does not keep track of AIL mode in a central place, it's based on the current LPCR[AIL] bits. Synchronize the new CPU's LPCR to the current LPCR in rtas_start_cpu(), similarly to the way the ILE bit is synchronized. Open-code the ILE setting as well now that the caller's LPCR is available directly, there is no need for the indirection. Without this, under both TCG and KVM, adding a POWER8/9/10 class CPU with a new core ID after a modern Linux has booted results in the new CPU's LPCR missing the LPCR[AIL]=3D0b11 setting that the other CPUs have. This can cause crashes and unexpected behaviour. Signed-off-by: Nicholas Piggin Reviewed-by: C=C3=A9dric Le Goater Reviewed-by: Greg Kurz --- hw/ppc/spapr_rtas.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/hw/ppc/spapr_rtas.c b/hw/ppc/spapr_rtas.c index 63d96955c0..b476382ae6 100644 --- a/hw/ppc/spapr_rtas.c +++ b/hw/ppc/spapr_rtas.c @@ -132,8 +132,8 @@ static void rtas_start_cpu(PowerPCCPU *callcpu, SpaprMa= chineState *spapr, target_ulong id, start, r3; PowerPCCPU *newcpu; CPUPPCState *env; - PowerPCCPUClass *pcc; target_ulong lpcr; + target_ulong caller_lpcr; =20 if (nargs !=3D 3 || nret !=3D 1) { rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); @@ -152,7 +152,6 @@ static void rtas_start_cpu(PowerPCCPU *callcpu, SpaprMa= chineState *spapr, } =20 env =3D &newcpu->env; - pcc =3D POWERPC_CPU_GET_CLASS(newcpu); =20 if (!CPU(newcpu)->halted) { rtas_st(rets, 0, RTAS_OUT_HW_ERROR); @@ -164,10 +163,15 @@ static void rtas_start_cpu(PowerPCCPU *callcpu, Spapr= MachineState *spapr, env->msr =3D (1ULL << MSR_SF) | (1ULL << MSR_ME); hreg_compute_hflags(env); =20 + caller_lpcr =3D callcpu->env.spr[SPR_LPCR]; lpcr =3D env->spr[SPR_LPCR]; - if (!pcc->interrupts_big_endian(callcpu)) { - lpcr |=3D LPCR_ILE; - } + + /* Set ILE the same way */ + lpcr =3D (lpcr & ~LPCR_ILE) | (caller_lpcr & LPCR_ILE); + + /* Set AIL the same way */ + lpcr =3D (lpcr & ~LPCR_AIL) | (caller_lpcr & LPCR_AIL); + if (env->mmu_model =3D=3D POWERPC_MMU_3_00) { /* * New cpus are expected to start in the same radix/hash mode --=20 2.23.0