From 5e232f4f428c4266ba5cdae9f23ba19a0913dcf9 Mon Sep 17 00:00:00 2001 From: Glauber de Oliveira Costa Date: Mon, 7 Jan 2008 11:05:36 -0200 Subject: 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 Signed-off-by: Rusty Russell --- drivers/lguest/core.c | 6 +++--- drivers/lguest/hypercalls.c | 6 +++--- drivers/lguest/lg.h | 3 ++- drivers/lguest/lguest_user.c | 4 ++-- 4 files changed, 10 insertions(+), 9 deletions(-) diff --git a/drivers/lguest/core.c b/drivers/lguest/core.c index 66c3d3b17fe..6023872e32d 100644 --- a/drivers/lguest/core.c +++ b/drivers/lguest/core.c @@ -186,10 +186,10 @@ int run_guest(struct lg_cpu *cpu, unsigned long __user *user) /* 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 ab70bbebdf2..be8f0468576 100644 --- a/drivers/lguest/hypercalls.c +++ b/drivers/lguest/hypercalls.c @@ -91,7 +91,7 @@ static void do_hcall(struct lg_cpu *cpu, struct hcall_args *args) 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 @@ static void do_async_hcalls(struct lg_cpu *cpu) /* 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 @@ void do_hypercalls(struct lg_cpu *cpu) /* 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 05637648a17..95b473cdd0e 100644 --- a/drivers/lguest/lg.h +++ b/drivers/lguest/lg.h @@ -51,6 +51,8 @@ struct lg_cpu { 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 lguest 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 980b3550db7..f4f6df85bec 100644 --- a/drivers/lguest/lguest_user.c +++ b/drivers/lguest/lguest_user.c @@ -89,8 +89,8 @@ static ssize_t read(struct file *file, char __user *user, size_t size,loff_t*o) /* 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); -- cgit v1.2.3-70-g09d2