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bh=IKcVnvrKgTTEJRoiXNj9Odxk3Sl4YxdUhZJ6hngXBk0=; b=ahPGv15R21J0gJGnjBMDB/n0yLqBMjZZbZNwA0Ie/vqL91Xosr2c4I4XYRHTP9IkG3PJxl 28wP6OSh5lXEkS37ETYA6hxLSuvH0Aj1jbOy1kB1eqJwoohRRQvBxi+LYOJyM+BZM//+lh jEz+mo84fkLfRtzmuUPVBRrWU2eSGGI= X-MC-Unique: xs1vPO_YPAizQBiH_8v6_w-1 From: Jason Wang To: peter.maydell@linaro.org Subject: [PULL V2 1/3] hw/net/imx_fec: return 0xffff when accessing non-existing PHY Date: Thu, 27 May 2021 12:24:36 +0800 Message-Id: <1622089478-5426-2-git-send-email-jasowang@redhat.com> In-Reply-To: <1622089478-5426-1-git-send-email-jasowang@redhat.com> References: <1622089478-5426-1-git-send-email-jasowang@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=jasowang@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="utf-8" 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=170.10.133.124; envelope-from=jasowang@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -31 X-Spam_score: -3.2 X-Spam_bar: --- X-Spam_report: (-3.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.371, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, 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: Jason Wang , qemu-devel@nongnu.org, Guenter Roeck , Jean-Christophe Dubois Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) From: Guenter Roeck If a PHY does not exist, attempts to read from it should return 0xffff. Otherwise the Linux kernel will believe that a PHY is there and select the non-existing PHY. This in turn will result in network errors later on since the real PHY is not selected or configured. Since reading from or writing to a non-existing PHY is not an emulation error, replace guest error messages with traces. Fixes: 461c51ad4275 ("Add a phy-num property to the i.MX FEC emulator") Cc: Jean-Christophe Dubois Reviewed-by: Bin Meng Tested-by: Bin Meng Reviewed-by: Philippe Mathieu-Daud=C3=A9 Signed-off-by: Guenter Roeck Signed-off-by: Jason Wang --- hw/net/imx_fec.c | 8 +++----- hw/net/trace-events | 2 ++ 2 files changed, 5 insertions(+), 5 deletions(-) diff --git a/hw/net/imx_fec.c b/hw/net/imx_fec.c index f03450c..9c7035b 100644 --- a/hw/net/imx_fec.c +++ b/hw/net/imx_fec.c @@ -283,9 +283,8 @@ static uint32_t imx_phy_read(IMXFECState *s, int reg) uint32_t phy =3D reg / 32; =20 if (phy !=3D s->phy_num) { - qemu_log_mask(LOG_GUEST_ERROR, "[%s.phy]%s: Bad phy num %u\n", - TYPE_IMX_FEC, __func__, phy); - return 0; + trace_imx_phy_read_num(phy, s->phy_num); + return 0xffff; } =20 reg %=3D 32; @@ -345,8 +344,7 @@ static void imx_phy_write(IMXFECState *s, int reg, uint= 32_t val) uint32_t phy =3D reg / 32; =20 if (phy !=3D s->phy_num) { - qemu_log_mask(LOG_GUEST_ERROR, "[%s.phy]%s: Bad phy num %u\n", - TYPE_IMX_FEC, __func__, phy); + trace_imx_phy_write_num(phy, s->phy_num); return; } =20 diff --git a/hw/net/trace-events b/hw/net/trace-events index baf25ff..78e8566 100644 --- a/hw/net/trace-events +++ b/hw/net/trace-events @@ -414,7 +414,9 @@ i82596_channel_attention(void *s) "%p: Received CHANNEL= ATTENTION" =20 # imx_fec.c imx_phy_read(uint32_t val, int phy, int reg) "0x%04"PRIx32" <=3D phy[%d].r= eg[%d]" +imx_phy_read_num(int phy, int configured) "read request from unconfigured = phy %d (configured %d)" imx_phy_write(uint32_t val, int phy, int reg) "0x%04"PRIx32" =3D> phy[%d].= reg[%d]" +imx_phy_write_num(int phy, int configured) "write request to unconfigured = phy %d (configured %d)" imx_phy_update_link(const char *s) "%s" imx_phy_reset(void) "" imx_fec_read_bd(uint64_t addr, int flags, int len, int data) "tx_bd 0x%"PR= Ix64" flags 0x%04x len %d data 0x%08x" --=20 2.7.4