summaryrefslogtreecommitdiffstats
path: root/arch/x86/mm
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/mm')
-rw-r--r--arch/x86/mm/kmmio.c42
-rw-r--r--arch/x86/mm/mmio-mod.c71
2 files changed, 56 insertions, 57 deletions
diff --git a/arch/x86/mm/kmmio.c b/arch/x86/mm/kmmio.c
index 07bcc30..c0f6198 100644
--- a/arch/x86/mm/kmmio.c
+++ b/arch/x86/mm/kmmio.c
@@ -5,6 +5,8 @@
* 2008 Pekka Paalanen <pq@iki.fi>
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/list.h>
#include <linux/rculist.h>
#include <linux/spinlock.h>
@@ -136,7 +138,7 @@ static int clear_page_presence(struct kmmio_fault_page *f, bool clear)
pte_t *pte = lookup_address(f->page, &level);
if (!pte) {
- pr_err("kmmio: no pte for page 0x%08lx\n", f->page);
+ pr_err("no pte for page 0x%08lx\n", f->page);
return -1;
}
@@ -148,7 +150,7 @@ static int clear_page_presence(struct kmmio_fault_page *f, bool clear)
clear_pte_presence(pte, clear, &f->old_presence);
break;
default:
- pr_err("kmmio: unexpected page level 0x%x.\n", level);
+ pr_err("unexpected page level 0x%x.\n", level);
return -1;
}
@@ -170,13 +172,14 @@ static int clear_page_presence(struct kmmio_fault_page *f, bool clear)
static int arm_kmmio_fault_page(struct kmmio_fault_page *f)
{
int ret;
- WARN_ONCE(f->armed, KERN_ERR "kmmio page already armed.\n");
+ WARN_ONCE(f->armed, KERN_ERR pr_fmt("kmmio page already armed.\n"));
if (f->armed) {
- pr_warning("kmmio double-arm: page 0x%08lx, ref %d, old %d\n",
- f->page, f->count, !!f->old_presence);
+ pr_warning("double-arm: page 0x%08lx, ref %d, old %d\n",
+ f->page, f->count, !!f->old_presence);
}
ret = clear_page_presence(f, true);
- WARN_ONCE(ret < 0, KERN_ERR "kmmio arming 0x%08lx failed.\n", f->page);
+ WARN_ONCE(ret < 0, KERN_ERR pr_fmt("arming 0x%08lx failed.\n"),
+ f->page);
f->armed = true;
return ret;
}
@@ -240,24 +243,21 @@ int kmmio_handler(struct pt_regs *regs, unsigned long addr)
* condition needs handling by do_page_fault(), the
* page really not being present is the most common.
*/
- pr_debug("kmmio: secondary hit for 0x%08lx CPU %d.\n",
- addr, smp_processor_id());
+ pr_debug("secondary hit for 0x%08lx CPU %d.\n",
+ addr, smp_processor_id());
if (!faultpage->old_presence)
- pr_info("kmmio: unexpected secondary hit for "
- "address 0x%08lx on CPU %d.\n", addr,
- smp_processor_id());
+ pr_info("unexpected secondary hit for address 0x%08lx on CPU %d.\n",
+ addr, smp_processor_id());
} else {
/*
* Prevent overwriting already in-flight context.
* This should not happen, let's hope disarming at
* least prevents a panic.
*/
- pr_emerg("kmmio: recursive probe hit on CPU %d, "
- "for address 0x%08lx. Ignoring.\n",
- smp_processor_id(), addr);
- pr_emerg("kmmio: previous hit was at 0x%08lx.\n",
- ctx->addr);
+ pr_emerg("recursive probe hit on CPU %d, for address 0x%08lx. Ignoring.\n",
+ smp_processor_id(), addr);
+ pr_emerg("previous hit was at 0x%08lx.\n", ctx->addr);
disarm_kmmio_fault_page(faultpage);
}
goto no_kmmio_ctx;
@@ -316,8 +316,8 @@ static int post_kmmio_handler(unsigned long condition, struct pt_regs *regs)
* something external causing them (f.e. using a debugger while
* mmio tracing enabled), or erroneous behaviour
*/
- pr_warning("kmmio: unexpected debug trap on CPU %d.\n",
- smp_processor_id());
+ pr_warning("unexpected debug trap on CPU %d.\n",
+ smp_processor_id());
goto out;
}
@@ -425,7 +425,7 @@ int register_kmmio_probe(struct kmmio_probe *p)
list_add_rcu(&p->list, &kmmio_probes);
while (size < size_lim) {
if (add_kmmio_fault_page(p->addr + size))
- pr_err("kmmio: Unable to set page fault.\n");
+ pr_err("Unable to set page fault.\n");
size += PAGE_SIZE;
}
out:
@@ -490,7 +490,7 @@ static void remove_kmmio_fault_pages(struct rcu_head *head)
* 2. remove_kmmio_fault_pages()
* Remove the pages from kmmio_page_table.
* 3. rcu_free_kmmio_fault_pages()
- * Actally free the kmmio_fault_page structs as with RCU.
+ * Actually free the kmmio_fault_page structs as with RCU.
*/
void unregister_kmmio_probe(struct kmmio_probe *p)
{
@@ -511,7 +511,7 @@ void unregister_kmmio_probe(struct kmmio_probe *p)
drelease = kmalloc(sizeof(*drelease), GFP_ATOMIC);
if (!drelease) {
- pr_crit("kmmio: leaking kmmio_fault_page objects.\n");
+ pr_crit("leaking kmmio_fault_page objects.\n");
return;
}
drelease->release_list = release_list;
diff --git a/arch/x86/mm/mmio-mod.c b/arch/x86/mm/mmio-mod.c
index 132772a..4c765e9 100644
--- a/arch/x86/mm/mmio-mod.c
+++ b/arch/x86/mm/mmio-mod.c
@@ -19,6 +19,9 @@
*
* Derived from the read-mod example from relay-examples by Tom Zanussi.
*/
+
+#define pr_fmt(fmt) "mmiotrace: "
+
#define DEBUG 1
#include <linux/module.h>
@@ -36,8 +39,6 @@
#include "pf_in.h"
-#define NAME "mmiotrace: "
-
struct trap_reason {
unsigned long addr;
unsigned long ip;
@@ -96,17 +97,18 @@ static void print_pte(unsigned long address)
pte_t *pte = lookup_address(address, &level);
if (!pte) {
- pr_err(NAME "Error in %s: no pte for page 0x%08lx\n",
- __func__, address);
+ pr_err("Error in %s: no pte for page 0x%08lx\n",
+ __func__, address);
return;
}
if (level == PG_LEVEL_2M) {
- pr_emerg(NAME "4MB pages are not currently supported: "
- "0x%08lx\n", address);
+ pr_emerg("4MB pages are not currently supported: 0x%08lx\n",
+ address);
BUG();
}
- pr_info(NAME "pte for 0x%lx: 0x%llx 0x%llx\n", address,
+ pr_info("pte for 0x%lx: 0x%llx 0x%llx\n",
+ address,
(unsigned long long)pte_val(*pte),
(unsigned long long)pte_val(*pte) & _PAGE_PRESENT);
}
@@ -118,22 +120,21 @@ static void print_pte(unsigned long address)
static void die_kmmio_nesting_error(struct pt_regs *regs, unsigned long addr)
{
const struct trap_reason *my_reason = &get_cpu_var(pf_reason);
- pr_emerg(NAME "unexpected fault for address: 0x%08lx, "
- "last fault for address: 0x%08lx\n",
- addr, my_reason->addr);
+ pr_emerg("unexpected fault for address: 0x%08lx, last fault for address: 0x%08lx\n",
+ addr, my_reason->addr);
print_pte(addr);
print_symbol(KERN_EMERG "faulting IP is at %s\n", regs->ip);
print_symbol(KERN_EMERG "last faulting IP was at %s\n", my_reason->ip);
#ifdef __i386__
pr_emerg("eax: %08lx ebx: %08lx ecx: %08lx edx: %08lx\n",
- regs->ax, regs->bx, regs->cx, regs->dx);
+ regs->ax, regs->bx, regs->cx, regs->dx);
pr_emerg("esi: %08lx edi: %08lx ebp: %08lx esp: %08lx\n",
- regs->si, regs->di, regs->bp, regs->sp);
+ regs->si, regs->di, regs->bp, regs->sp);
#else
pr_emerg("rax: %016lx rcx: %016lx rdx: %016lx\n",
- regs->ax, regs->cx, regs->dx);
+ regs->ax, regs->cx, regs->dx);
pr_emerg("rsi: %016lx rdi: %016lx rbp: %016lx rsp: %016lx\n",
- regs->si, regs->di, regs->bp, regs->sp);
+ regs->si, regs->di, regs->bp, regs->sp);
#endif
put_cpu_var(pf_reason);
BUG();
@@ -213,7 +214,7 @@ static void post(struct kmmio_probe *p, unsigned long condition,
/* this should always return the active_trace count to 0 */
my_reason->active_traces--;
if (my_reason->active_traces) {
- pr_emerg(NAME "unexpected post handler");
+ pr_emerg("unexpected post handler");
BUG();
}
@@ -244,7 +245,7 @@ static void ioremap_trace_core(resource_size_t offset, unsigned long size,
};
if (!trace) {
- pr_err(NAME "kmalloc failed in ioremap\n");
+ pr_err("kmalloc failed in ioremap\n");
return;
}
@@ -282,8 +283,8 @@ void mmiotrace_ioremap(resource_size_t offset, unsigned long size,
if (!is_enabled()) /* recheck and proper locking in *_core() */
return;
- pr_debug(NAME "ioremap_*(0x%llx, 0x%lx) = %p\n",
- (unsigned long long)offset, size, addr);
+ pr_debug("ioremap_*(0x%llx, 0x%lx) = %p\n",
+ (unsigned long long)offset, size, addr);
if ((filter_offset) && (offset != filter_offset))
return;
ioremap_trace_core(offset, size, addr);
@@ -301,7 +302,7 @@ static void iounmap_trace_core(volatile void __iomem *addr)
struct remap_trace *tmp;
struct remap_trace *found_trace = NULL;
- pr_debug(NAME "Unmapping %p.\n", addr);
+ pr_debug("Unmapping %p.\n", addr);
spin_lock_irq(&trace_lock);
if (!is_enabled())
@@ -363,9 +364,8 @@ static void clear_trace_list(void)
* Caller also ensures is_enabled() cannot change.
*/
list_for_each_entry(trace, &trace_list, list) {
- pr_notice(NAME "purging non-iounmapped "
- "trace @0x%08lx, size 0x%lx.\n",
- trace->probe.addr, trace->probe.len);
+ pr_notice("purging non-iounmapped trace @0x%08lx, size 0x%lx.\n",
+ trace->probe.addr, trace->probe.len);
if (!nommiotrace)
unregister_kmmio_probe(&trace->probe);
}
@@ -387,7 +387,7 @@ static void enter_uniprocessor(void)
if (downed_cpus == NULL &&
!alloc_cpumask_var(&downed_cpus, GFP_KERNEL)) {
- pr_notice(NAME "Failed to allocate mask\n");
+ pr_notice("Failed to allocate mask\n");
goto out;
}
@@ -395,20 +395,19 @@ static void enter_uniprocessor(void)
cpumask_copy(downed_cpus, cpu_online_mask);
cpumask_clear_cpu(cpumask_first(cpu_online_mask), downed_cpus);
if (num_online_cpus() > 1)
- pr_notice(NAME "Disabling non-boot CPUs...\n");
+ pr_notice("Disabling non-boot CPUs...\n");
put_online_cpus();
for_each_cpu(cpu, downed_cpus) {
err = cpu_down(cpu);
if (!err)
- pr_info(NAME "CPU%d is down.\n", cpu);
+ pr_info("CPU%d is down.\n", cpu);
else
- pr_err(NAME "Error taking CPU%d down: %d\n", cpu, err);
+ pr_err("Error taking CPU%d down: %d\n", cpu, err);
}
out:
if (num_online_cpus() > 1)
- pr_warning(NAME "multiple CPUs still online, "
- "may miss events.\n");
+ pr_warning("multiple CPUs still online, may miss events.\n");
}
/* __ref because leave_uniprocessor calls cpu_up which is __cpuinit,
@@ -420,13 +419,13 @@ static void __ref leave_uniprocessor(void)
if (downed_cpus == NULL || cpumask_weight(downed_cpus) == 0)
return;
- pr_notice(NAME "Re-enabling CPUs...\n");
+ pr_notice("Re-enabling CPUs...\n");
for_each_cpu(cpu, downed_cpus) {
err = cpu_up(cpu);
if (!err)
- pr_info(NAME "enabled CPU%d.\n", cpu);
+ pr_info("enabled CPU%d.\n", cpu);
else
- pr_err(NAME "cannot re-enable CPU%d: %d\n", cpu, err);
+ pr_err("cannot re-enable CPU%d: %d\n", cpu, err);
}
}
@@ -434,8 +433,8 @@ static void __ref leave_uniprocessor(void)
static void enter_uniprocessor(void)
{
if (num_online_cpus() > 1)
- pr_warning(NAME "multiple CPUs are online, may miss events. "
- "Suggest booting with maxcpus=1 kernel argument.\n");
+ pr_warning("multiple CPUs are online, may miss events. "
+ "Suggest booting with maxcpus=1 kernel argument.\n");
}
static void leave_uniprocessor(void)
@@ -450,13 +449,13 @@ void enable_mmiotrace(void)
goto out;
if (nommiotrace)
- pr_info(NAME "MMIO tracing disabled.\n");
+ pr_info("MMIO tracing disabled.\n");
kmmio_init();
enter_uniprocessor();
spin_lock_irq(&trace_lock);
atomic_inc(&mmiotrace_enabled);
spin_unlock_irq(&trace_lock);
- pr_info(NAME "enabled.\n");
+ pr_info("enabled.\n");
out:
mutex_unlock(&mmiotrace_mutex);
}
@@ -475,7 +474,7 @@ void disable_mmiotrace(void)
clear_trace_list(); /* guarantees: no more kmmio callbacks */
leave_uniprocessor();
kmmio_cleanup();
- pr_info(NAME "disabled.\n");
+ pr_info("disabled.\n");
out:
mutex_unlock(&mmiotrace_mutex);
}
OpenPOWER on IntegriCloud