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xen: implement support for secondary consoles in the console backend

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This patch corresponds to commit
840184a106bc24e745beda5c77e392f6cecd2bc9 from
git://xenbits.xensource.com/qemu-xen-unstable.git.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
This commit is contained in:
Stefano Stabellini 2012-12-17 11:36:09 +00:00
parent a8a826a3c3
commit 2c1d4d15f0
1 changed files with 21 additions and 7 deletions
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28
hw/xen_console.c
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@ -184,7 +184,11 @@ static int con_init(struct XenDevice *xendev)
/* setup */
dom = xs_get_domain_path(xenstore, con->xendev.dom);
snprintf(con->console, sizeof(con->console), "%s/console", dom);
if (!xendev->dev) {
snprintf(con->console, sizeof(con->console), "%s/console", dom);
} else {
snprintf(con->console, sizeof(con->console), "%s/device/console/%d", dom, xendev->dev);
}
free(dom);
type = xenstore_read_str(con->console, "type");
@ -223,10 +227,16 @@ static int con_initialise(struct XenDevice *xendev)
if (xenstore_read_int(con->console, "limit", &limit) == 0)
con->buffer.max_capacity = limit;
con->sring = xc_map_foreign_range(xen_xc, con->xendev.dom,
XC_PAGE_SIZE,
PROT_READ|PROT_WRITE,
con->ring_ref);
if (!xendev->dev) {
con->sring = xc_map_foreign_range(xen_xc, con->xendev.dom,
XC_PAGE_SIZE,
PROT_READ|PROT_WRITE,
con->ring_ref);
} else {
con->sring = xc_gnttab_map_grant_ref(xendev->gnttabdev, con->xendev.dom,
con->ring_ref,
PROT_READ|PROT_WRITE);
}
if (!con->sring)
return -1;
@ -255,7 +265,11 @@ static void con_disconnect(struct XenDevice *xendev)
xen_be_unbind_evtchn(&con->xendev);
if (con->sring) {
munmap(con->sring, XC_PAGE_SIZE);
if (!xendev->gnttabdev) {
munmap(con->sring, XC_PAGE_SIZE);
} else {
xc_gnttab_munmap(xendev->gnttabdev, con->sring, 1);
}
con->sring = NULL;
}
}
@ -273,7 +287,7 @@ static void con_event(struct XenDevice *xendev)
struct XenDevOps xen_console_ops = {
.size = sizeof(struct XenConsole),
.flags = DEVOPS_FLAG_IGNORE_STATE,
.flags = DEVOPS_FLAG_IGNORE_STATE|DEVOPS_FLAG_NEED_GNTDEV,
.init = con_init,
.initialise = con_initialise,
.event = con_event,