| Message ID | 20210503135300.3242369-1-linux@roeck-us.net (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2] hw/net/imx_fec: return 0xffff when accessing non-existing PHY | expand |
在 2021/5/3 下午9:53, Guenter Roeck 写道: > 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 <jcd@tribudubois.net> > Reviewed-by: Bin Meng <bmeng.cn@gmail.com> > Tested-by: Bin Meng <bmeng.cn@gmail.com> > Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> > Signed-off-by: Guenter Roeck <linux@roeck-us.net> > --- > v2: Reordered imx_phy_read/imx_phy_read_num in trace_events > Added Reviewed-by:/Tested-by: tags Applied. Thanks > > 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 f03450c028..9c7035bc94 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 = reg / 32; > > if (phy != 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; > } > > reg %= 32; > @@ -345,8 +344,7 @@ static void imx_phy_write(IMXFECState *s, int reg, uint32_t val) > uint32_t phy = reg / 32; > > if (phy != 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; > } > > diff --git a/hw/net/trace-events b/hw/net/trace-events > index baf25ffa7e..78e85660bf 100644 > --- a/hw/net/trace-events > +++ b/hw/net/trace-events > @@ -414,7 +414,9 @@ i82596_channel_attention(void *s) "%p: Received CHANNEL ATTENTION" > > # imx_fec.c > imx_phy_read(uint32_t val, int phy, int reg) "0x%04"PRIx32" <= phy[%d].reg[%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" => 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%"PRIx64" flags 0x%04x len %d data 0x%08x"
diff --git a/hw/net/imx_fec.c b/hw/net/imx_fec.c index f03450c028..9c7035bc94 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 = reg / 32; if (phy != 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; } reg %= 32; @@ -345,8 +344,7 @@ static void imx_phy_write(IMXFECState *s, int reg, uint32_t val) uint32_t phy = reg / 32; if (phy != 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; } diff --git a/hw/net/trace-events b/hw/net/trace-events index baf25ffa7e..78e85660bf 100644 --- a/hw/net/trace-events +++ b/hw/net/trace-events @@ -414,7 +414,9 @@ i82596_channel_attention(void *s) "%p: Received CHANNEL ATTENTION" # imx_fec.c imx_phy_read(uint32_t val, int phy, int reg) "0x%04"PRIx32" <= phy[%d].reg[%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" => 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%"PRIx64" flags 0x%04x len %d data 0x%08x"
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 <jcd@tribudubois.net> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Tested-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Guenter Roeck <linux@roeck-us.net> --- v2: Reordered imx_phy_read/imx_phy_read_num in trace_events Added Reviewed-by:/Tested-by: tags hw/net/imx_fec.c | 8 +++----- hw/net/trace-events | 2 ++ 2 files changed, 5 insertions(+), 5 deletions(-)