| Message ID | 1494426918-32737-4-git-send-email-bhupinder.thakur@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | None | expand |
On Wed, May 10, 2017 at 08:05:15PM +0530, Bhupinder Thakur wrote: > Xenconsole supports only PV console currently. This patch adds support > for vuart console, which allows emulated pl011 UART to be accessed > as a console. > > Signed-off-by: Bhupinder Thakur <bhupinder.thakur@linaro.org> > --- > > One review comment was to keep the vuart code under CONFIG_ARM64 && CONFIG_ACPI flags. > This code review could not be incorporated as I could not find out the appropriate flags > unders which this code can be kept. Are the CONFIG* flags exported to xenconsole? IIRC they are exported. > > tools/console/daemon/io.c | 29 +++++++++++++++++++++++++++++ > 1 file changed, 29 insertions(+) > > diff --git a/tools/console/daemon/io.c b/tools/console/daemon/io.c > index 9bb14de..19a2f35 100644 > --- a/tools/console/daemon/io.c > +++ b/tools/console/daemon/io.c > @@ -115,6 +115,7 @@ struct console_data { > }; > > static int map_pvcon_ring_ref(struct console *, int ); > +static int map_vuartcon_ring_ref(struct console *, int ); > > static struct console_data console_data[] = { > > @@ -124,6 +125,12 @@ static struct console_data console_data[] = { > .mapfunc = map_pvcon_ring_ref, > .mandatory = true > }, > + { > + .xsname = "/vuart/0", > + .ttyname = "tty", > + .mapfunc = map_vuartcon_ring_ref, > + .mandatory = false > + } > }; > > #define MAX_CONSOLE (sizeof(console_data)/sizeof(struct console_data)) > @@ -751,6 +758,28 @@ out: > return err; > } > > +static int map_vuartcon_ring_ref(struct console *con, int ring_ref) > +{ > + int err = 0; > + struct domain *dom = con->d; > + > + if (!con->interface) { > + con->interface = xc_map_foreign_range(xc, > + dom->domid, > + XC_PAGE_SIZE, > + PROT_READ|PROT_WRITE, > + (unsigned long)ring_ref); Indentation. > + if (con->interface == NULL) { > + err = EINVAL; > + goto out; > + } > + con->ring_ref = ring_ref; > + } > + > +out: > + return err; > +} > + > static int console_create_ring(struct console *con) > { > int err, remote_port, ring_ref; > -- > 2.7.4 >
On Wed, 10 May 2017, Bhupinder Thakur wrote: > Xenconsole supports only PV console currently. This patch adds support > for vuart console, which allows emulated pl011 UART to be accessed > as a console. > > Signed-off-by: Bhupinder Thakur <bhupinder.thakur@linaro.org> > --- > > One review comment was to keep the vuart code under CONFIG_ARM64 && CONFIG_ACPI flags. > This code review could not be incorporated as I could not find out the appropriate flags > unders which this code can be kept. Are the CONFIG* flags exported to xenconsole? Not sure about ACPI, but CONFIG_ARM_64 definitely should be. This patch looks good, however I don't feel confident giving my acked-by until I can review properly the previous one. > tools/console/daemon/io.c | 29 +++++++++++++++++++++++++++++ > 1 file changed, 29 insertions(+) > > diff --git a/tools/console/daemon/io.c b/tools/console/daemon/io.c > index 9bb14de..19a2f35 100644 > --- a/tools/console/daemon/io.c > +++ b/tools/console/daemon/io.c > @@ -115,6 +115,7 @@ struct console_data { > }; > > static int map_pvcon_ring_ref(struct console *, int ); > +static int map_vuartcon_ring_ref(struct console *, int ); > > static struct console_data console_data[] = { > > @@ -124,6 +125,12 @@ static struct console_data console_data[] = { > .mapfunc = map_pvcon_ring_ref, > .mandatory = true > }, > + { > + .xsname = "/vuart/0", > + .ttyname = "tty", > + .mapfunc = map_vuartcon_ring_ref, > + .mandatory = false > + } > }; > > #define MAX_CONSOLE (sizeof(console_data)/sizeof(struct console_data)) > @@ -751,6 +758,28 @@ out: > return err; > } > > +static int map_vuartcon_ring_ref(struct console *con, int ring_ref) > +{ > + int err = 0; > + struct domain *dom = con->d; > + > + if (!con->interface) { > + con->interface = xc_map_foreign_range(xc, > + dom->domid, > + XC_PAGE_SIZE, > + PROT_READ|PROT_WRITE, > + (unsigned long)ring_ref); > + if (con->interface == NULL) { > + err = EINVAL; > + goto out; > + } > + con->ring_ref = ring_ref; > + } > + > +out: > + return err; > +} > + > static int console_create_ring(struct console *con) > { > int err, remote_port, ring_ref; > -- > 2.7.4 > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xen.org > https://lists.xen.org/xen-devel >
Hi, On 17/05/17 00:44, Stefano Stabellini wrote: > On Wed, 10 May 2017, Bhupinder Thakur wrote: >> Xenconsole supports only PV console currently. This patch adds support >> for vuart console, which allows emulated pl011 UART to be accessed >> as a console. >> >> Signed-off-by: Bhupinder Thakur <bhupinder.thakur@linaro.org> >> --- >> >> One review comment was to keep the vuart code under CONFIG_ARM64 && CONFIG_ACPI flags. >> This code review could not be incorporated as I could not find out the appropriate flags >> unders which this code can be kept. Are the CONFIG* flags exported to xenconsole? > > Not sure about ACPI, but CONFIG_ARM_64 definitely should be. Why only CONFIG_ARM_64? I don't see any restriction preventing to be used for ARM32 bit also. If we decide to limit to ARM_64 here, then we should do the same on the hypervisor side. But I am wondering whether we should have a configure option for that as the hypervisor may not support pl011 (the user is allowed to disable it). Cheers, > > This patch looks good, however I don't feel confident giving my acked-by > until I can review properly the previous one. > > >> tools/console/daemon/io.c | 29 +++++++++++++++++++++++++++++ >> 1 file changed, 29 insertions(+) >> >> diff --git a/tools/console/daemon/io.c b/tools/console/daemon/io.c >> index 9bb14de..19a2f35 100644 >> --- a/tools/console/daemon/io.c >> +++ b/tools/console/daemon/io.c >> @@ -115,6 +115,7 @@ struct console_data { >> }; >> >> static int map_pvcon_ring_ref(struct console *, int ); >> +static int map_vuartcon_ring_ref(struct console *, int ); >> >> static struct console_data console_data[] = { >> >> @@ -124,6 +125,12 @@ static struct console_data console_data[] = { >> .mapfunc = map_pvcon_ring_ref, >> .mandatory = true >> }, >> + { >> + .xsname = "/vuart/0", >> + .ttyname = "tty", >> + .mapfunc = map_vuartcon_ring_ref, >> + .mandatory = false >> + } >> }; >> >> #define MAX_CONSOLE (sizeof(console_data)/sizeof(struct console_data)) >> @@ -751,6 +758,28 @@ out: >> return err; >> } >> >> +static int map_vuartcon_ring_ref(struct console *con, int ring_ref) >> +{ >> + int err = 0; >> + struct domain *dom = con->d; >> + >> + if (!con->interface) { >> + con->interface = xc_map_foreign_range(xc, >> + dom->domid, >> + XC_PAGE_SIZE, >> + PROT_READ|PROT_WRITE, >> + (unsigned long)ring_ref); >> + if (con->interface == NULL) { >> + err = EINVAL; >> + goto out; >> + } >> + con->ring_ref = ring_ref; >> + } >> + >> +out: >> + return err; >> +} >> + >> static int console_create_ring(struct console *con) >> { >> int err, remote_port, ring_ref; >> -- >> 2.7.4 >> >> >> _______________________________________________ >> Xen-devel mailing list >> Xen-devel@lists.xen.org >> https://lists.xen.org/xen-devel >> > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xen.org > https://lists.xen.org/xen-devel >
diff --git a/tools/console/daemon/io.c b/tools/console/daemon/io.c index 9bb14de..19a2f35 100644 --- a/tools/console/daemon/io.c +++ b/tools/console/daemon/io.c @@ -115,6 +115,7 @@ struct console_data { }; static int map_pvcon_ring_ref(struct console *, int ); +static int map_vuartcon_ring_ref(struct console *, int ); static struct console_data console_data[] = { @@ -124,6 +125,12 @@ static struct console_data console_data[] = { .mapfunc = map_pvcon_ring_ref, .mandatory = true }, + { + .xsname = "/vuart/0", + .ttyname = "tty", + .mapfunc = map_vuartcon_ring_ref, + .mandatory = false + } }; #define MAX_CONSOLE (sizeof(console_data)/sizeof(struct console_data)) @@ -751,6 +758,28 @@ out: return err; } +static int map_vuartcon_ring_ref(struct console *con, int ring_ref) +{ + int err = 0; + struct domain *dom = con->d; + + if (!con->interface) { + con->interface = xc_map_foreign_range(xc, + dom->domid, + XC_PAGE_SIZE, + PROT_READ|PROT_WRITE, + (unsigned long)ring_ref); + if (con->interface == NULL) { + err = EINVAL; + goto out; + } + con->ring_ref = ring_ref; + } + +out: + return err; +} + static int console_create_ring(struct console *con) { int err, remote_port, ring_ref;
Xenconsole supports only PV console currently. This patch adds support for vuart console, which allows emulated pl011 UART to be accessed as a console. Signed-off-by: Bhupinder Thakur <bhupinder.thakur@linaro.org> --- One review comment was to keep the vuart code under CONFIG_ARM64 && CONFIG_ACPI flags. This code review could not be incorporated as I could not find out the appropriate flags unders which this code can be kept. Are the CONFIG* flags exported to xenconsole? tools/console/daemon/io.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+)