lguest: make pending notifications per-vcpu
this patch makes the pending_notify field, used to control
pending notifications, per-vcpu, instead of per-guest
Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
diff --git a/drivers/lguest/core.c b/drivers/lguest/core.c
index 66c3d3b..6023872 100644
--- a/drivers/lguest/core.c
+++ b/drivers/lguest/core.c
@@ -186,10 +186,10 @@
/* It's possible the Guest did a NOTIFY hypercall to the
* Launcher, in which case we return from the read() now. */
- if (lg->pending_notify) {
- if (put_user(lg->pending_notify, user))
+ if (cpu->pending_notify) {
+ if (put_user(cpu->pending_notify, user))
return -EFAULT;
- return sizeof(lg->pending_notify);
+ return sizeof(cpu->pending_notify);
}
/* Check for signals */
diff --git a/drivers/lguest/hypercalls.c b/drivers/lguest/hypercalls.c
index ab70bbe..be8f046 100644
--- a/drivers/lguest/hypercalls.c
+++ b/drivers/lguest/hypercalls.c
@@ -91,7 +91,7 @@
cpu->halted = 1;
break;
case LHCALL_NOTIFY:
- lg->pending_notify = args->arg1;
+ cpu->pending_notify = args->arg1;
break;
default:
/* It should be an architecture-specific hypercall. */
@@ -154,7 +154,7 @@
/* Stop doing hypercalls if they want to notify the Launcher:
* it needs to service this first. */
- if (lg->pending_notify)
+ if (cpu->pending_notify)
break;
}
}
@@ -219,7 +219,7 @@
/* If we stopped reading the hypercall ring because the Guest did a
* NOTIFY to the Launcher, we want to return now. Otherwise we do
* the hypercall. */
- if (!cpu->lg->pending_notify) {
+ if (!cpu->pending_notify) {
do_hcall(cpu, cpu->hcall);
/* Tricky point: we reset the hcall pointer to mark the
* hypercall as "done". We use the hcall pointer rather than
diff --git a/drivers/lguest/lg.h b/drivers/lguest/lg.h
index 0563764..95b473c 100644
--- a/drivers/lguest/lg.h
+++ b/drivers/lguest/lg.h
@@ -51,6 +51,8 @@
u32 esp1;
u8 ss1;
+ unsigned long pending_notify; /* pfn from LHCALL_NOTIFY */
+
/* At end of a page shared mapped over lguest_pages in guest. */
unsigned long regs_page;
struct lguest_regs *regs;
@@ -95,7 +97,6 @@
struct pgdir pgdirs[4];
unsigned long noirq_start, noirq_end;
- unsigned long pending_notify; /* pfn from LHCALL_NOTIFY */
unsigned int stack_pages;
u32 tsc_khz;
diff --git a/drivers/lguest/lguest_user.c b/drivers/lguest/lguest_user.c
index 980b355..f4f6df8 100644
--- a/drivers/lguest/lguest_user.c
+++ b/drivers/lguest/lguest_user.c
@@ -89,8 +89,8 @@
/* If we returned from read() last time because the Guest notified,
* clear the flag. */
- if (lg->pending_notify)
- lg->pending_notify = 0;
+ if (cpu->pending_notify)
+ cpu->pending_notify = 0;
/* Run the Guest until something interesting happens. */
return run_guest(cpu, (unsigned long __user *)user);