Home Home > GIT Browse > stable
summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2017-12-31 13:13:56 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-12-31 13:13:56 -0800
commitf39d7d78b70e0f39facb1e4fab77ad3df5c52a35 (patch)
treeb5d2aa0746b70300ebbca82a8132af386cc5986d
parent52c90f2d32bfa7d6eccd66a56c44ace1f78fbadd (diff)
parenta31e58e129f73ab5b04016330b13ed51fde7a961 (diff)
Merge branch 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner: "A couple of fixlets for x86: - Fix the ESPFIX double fault handling for 5-level pagetables - Fix the commandline parsing for 'apic=' on 32bit systems and update documentation - Make zombie stack traces reliable - Fix kexec with stack canary - Fix the delivery mode for APICs which was missed when the x86 vector management was converted to single target delivery. Caused a regression due to the broken hardware which ignores affinity settings in lowest prio delivery mode. - Unbreak modules when AMD memory encryption is enabled - Remove an unused parameter of prepare_switch_to" * 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/apic: Switch all APICs to Fixed delivery mode x86/apic: Update the 'apic=' description of setting APIC driver x86/apic: Avoid wrong warning when parsing 'apic=' in X86-32 case x86-32: Fix kexec with stack canary (CONFIG_CC_STACKPROTECTOR) x86: Remove unused parameter of prepare_switch_to x86/stacktrace: Make zombie stack traces reliable x86/mm: Unbreak modules that use the DMA API x86/build: Make isoimage work on Debian x86/espfix/64: Fix espfix double-fault handling on 5-level systems
-rw-r--r--Documentation/admin-guide/kernel-parameters.txt6
-rw-r--r--arch/x86/boot/genimage.sh28
-rw-r--r--arch/x86/include/asm/switch_to.h5
-rw-r--r--arch/x86/kernel/apic/apic.c2
-rw-r--r--arch/x86/kernel/apic/apic_flat_64.c2
-rw-r--r--arch/x86/kernel/apic/apic_noop.c2
-rw-r--r--arch/x86/kernel/apic/msi.c8
-rw-r--r--arch/x86/kernel/apic/probe_32.c2
-rw-r--r--arch/x86/kernel/apic/x2apic_cluster.c2
-rw-r--r--arch/x86/kernel/machine_kexec_32.c4
-rw-r--r--arch/x86/kernel/stacktrace.c6
-rw-r--r--arch/x86/kernel/traps.c2
-rw-r--r--arch/x86/mm/mem_encrypt.c4
-rw-r--r--drivers/pci/host/pci-hyperv.c8
14 files changed, 42 insertions, 39 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 7041c6710f22..af7104aaffd9 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -328,11 +328,15 @@
not play well with APC CPU idle - disable it if you have
APC and your system crashes randomly.
- apic= [APIC,X86-32] Advanced Programmable Interrupt Controller
+ apic= [APIC,X86] Advanced Programmable Interrupt Controller
Change the output verbosity whilst booting
Format: { quiet (default) | verbose | debug }
Change the amount of debugging information output
when initialising the APIC and IO-APIC components.
+ For X86-32, this can also be used to specify an APIC
+ driver name.
+ Format: apic=driver_name
+ Examples: apic=bigsmp
apic_extnmi= [APIC,X86] External NMI delivery setting
Format: { bsp (default) | all | none }
diff --git a/arch/x86/boot/genimage.sh b/arch/x86/boot/genimage.sh
index c9e8499fbfe7..6a10d52a4145 100644
--- a/arch/x86/boot/genimage.sh
+++ b/arch/x86/boot/genimage.sh
@@ -80,39 +80,43 @@ genfdimage288() {
mcopy $FBZIMAGE w:linux
}
-genisoimage() {
+geniso() {
tmp_dir=`dirname $FIMAGE`/isoimage
rm -rf $tmp_dir
mkdir $tmp_dir
- for i in lib lib64 share end ; do
+ for i in lib lib64 share ; do
for j in syslinux ISOLINUX ; do
if [ -f /usr/$i/$j/isolinux.bin ] ; then
isolinux=/usr/$i/$j/isolinux.bin
- cp $isolinux $tmp_dir
fi
done
for j in syslinux syslinux/modules/bios ; do
if [ -f /usr/$i/$j/ldlinux.c32 ]; then
ldlinux=/usr/$i/$j/ldlinux.c32
- cp $ldlinux $tmp_dir
fi
done
if [ -n "$isolinux" -a -n "$ldlinux" ] ; then
break
fi
- if [ $i = end -a -z "$isolinux" ] ; then
- echo 'Need an isolinux.bin file, please install syslinux/isolinux.'
- exit 1
- fi
done
+ if [ -z "$isolinux" ] ; then
+ echo 'Need an isolinux.bin file, please install syslinux/isolinux.'
+ exit 1
+ fi
+ if [ -z "$ldlinux" ] ; then
+ echo 'Need an ldlinux.c32 file, please install syslinux/isolinux.'
+ exit 1
+ fi
+ cp $isolinux $tmp_dir
+ cp $ldlinux $tmp_dir
cp $FBZIMAGE $tmp_dir/linux
echo "$KCMDLINE" > $tmp_dir/isolinux.cfg
if [ -f "$FDINITRD" ] ; then
cp "$FDINITRD" $tmp_dir/initrd.img
fi
- mkisofs -J -r -input-charset=utf-8 -quiet -o $FIMAGE -b isolinux.bin \
- -c boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table \
- $tmp_dir
+ genisoimage -J -r -input-charset=utf-8 -quiet -o $FIMAGE \
+ -b isolinux.bin -c boot.cat -no-emul-boot -boot-load-size 4 \
+ -boot-info-table $tmp_dir
isohybrid $FIMAGE 2>/dev/null || true
rm -rf $tmp_dir
}
@@ -121,6 +125,6 @@ case $1 in
bzdisk) genbzdisk;;
fdimage144) genfdimage144;;
fdimage288) genfdimage288;;
- isoimage) genisoimage;;
+ isoimage) geniso;;
*) echo 'Unknown image format'; exit 1;
esac
diff --git a/arch/x86/include/asm/switch_to.h b/arch/x86/include/asm/switch_to.h
index 9b6df68d8fd1..eb5f7999a893 100644
--- a/arch/x86/include/asm/switch_to.h
+++ b/arch/x86/include/asm/switch_to.h
@@ -16,8 +16,7 @@ void __switch_to_xtra(struct task_struct *prev_p, struct task_struct *next_p,
struct tss_struct *tss);
/* This runs runs on the previous thread's stack. */
-static inline void prepare_switch_to(struct task_struct *prev,
- struct task_struct *next)
+static inline void prepare_switch_to(struct task_struct *next)
{
#ifdef CONFIG_VMAP_STACK
/*
@@ -70,7 +69,7 @@ struct fork_frame {
#define switch_to(prev, next, last) \
do { \
- prepare_switch_to(prev, next); \
+ prepare_switch_to(next); \
\
((last) = __switch_to_asm((prev), (next))); \
} while (0)
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index 6e272f3ea984..880441f24146 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -2626,11 +2626,13 @@ static int __init apic_set_verbosity(char *arg)
apic_verbosity = APIC_DEBUG;
else if (strcmp("verbose", arg) == 0)
apic_verbosity = APIC_VERBOSE;
+#ifdef CONFIG_X86_64
else {
pr_warning("APIC Verbosity level %s not recognised"
" use apic=verbose or apic=debug\n", arg);
return -EINVAL;
}
+#endif
return 0;
}
diff --git a/arch/x86/kernel/apic/apic_flat_64.c b/arch/x86/kernel/apic/apic_flat_64.c
index aa85690e9b64..25a87028cb3f 100644
--- a/arch/x86/kernel/apic/apic_flat_64.c
+++ b/arch/x86/kernel/apic/apic_flat_64.c
@@ -151,7 +151,7 @@ static struct apic apic_flat __ro_after_init = {
.apic_id_valid = default_apic_id_valid,
.apic_id_registered = flat_apic_id_registered,
- .irq_delivery_mode = dest_LowestPrio,
+ .irq_delivery_mode = dest_Fixed,
.irq_dest_mode = 1, /* logical */
.disable_esr = 0,
diff --git a/arch/x86/kernel/apic/apic_noop.c b/arch/x86/kernel/apic/apic_noop.c
index 7b659c4480c9..5078b5ce63a7 100644
--- a/arch/x86/kernel/apic/apic_noop.c
+++ b/arch/x86/kernel/apic/apic_noop.c
@@ -110,7 +110,7 @@ struct apic apic_noop __ro_after_init = {
.apic_id_valid = default_apic_id_valid,
.apic_id_registered = noop_apic_id_registered,
- .irq_delivery_mode = dest_LowestPrio,
+ .irq_delivery_mode = dest_Fixed,
/* logical delivery broadcast to all CPUs: */
.irq_dest_mode = 1,
diff --git a/arch/x86/kernel/apic/msi.c b/arch/x86/kernel/apic/msi.c
index 9b18be764422..ce503c99f5c4 100644
--- a/arch/x86/kernel/apic/msi.c
+++ b/arch/x86/kernel/apic/msi.c
@@ -39,17 +39,13 @@ static void irq_msi_compose_msg(struct irq_data *data, struct msi_msg *msg)
((apic->irq_dest_mode == 0) ?
MSI_ADDR_DEST_MODE_PHYSICAL :
MSI_ADDR_DEST_MODE_LOGICAL) |
- ((apic->irq_delivery_mode != dest_LowestPrio) ?
- MSI_ADDR_REDIRECTION_CPU :
- MSI_ADDR_REDIRECTION_LOWPRI) |
+ MSI_ADDR_REDIRECTION_CPU |
MSI_ADDR_DEST_ID(cfg->dest_apicid);
msg->data =
MSI_DATA_TRIGGER_EDGE |
MSI_DATA_LEVEL_ASSERT |
- ((apic->irq_delivery_mode != dest_LowestPrio) ?
- MSI_DATA_DELIVERY_FIXED :
- MSI_DATA_DELIVERY_LOWPRI) |
+ MSI_DATA_DELIVERY_FIXED |
MSI_DATA_VECTOR(cfg->vector);
}
diff --git a/arch/x86/kernel/apic/probe_32.c b/arch/x86/kernel/apic/probe_32.c
index fa22017de806..02e8acb134f8 100644
--- a/arch/x86/kernel/apic/probe_32.c
+++ b/arch/x86/kernel/apic/probe_32.c
@@ -105,7 +105,7 @@ static struct apic apic_default __ro_after_init = {
.apic_id_valid = default_apic_id_valid,
.apic_id_registered = default_apic_id_registered,
- .irq_delivery_mode = dest_LowestPrio,
+ .irq_delivery_mode = dest_Fixed,
/* logical delivery broadcast to all CPUs: */
.irq_dest_mode = 1,
diff --git a/arch/x86/kernel/apic/x2apic_cluster.c b/arch/x86/kernel/apic/x2apic_cluster.c
index 622f13ca8a94..8b04234e010b 100644
--- a/arch/x86/kernel/apic/x2apic_cluster.c
+++ b/arch/x86/kernel/apic/x2apic_cluster.c
@@ -184,7 +184,7 @@ static struct apic apic_x2apic_cluster __ro_after_init = {
.apic_id_valid = x2apic_apic_id_valid,
.apic_id_registered = x2apic_apic_id_registered,
- .irq_delivery_mode = dest_LowestPrio,
+ .irq_delivery_mode = dest_Fixed,
.irq_dest_mode = 1, /* logical */
.disable_esr = 0,
diff --git a/arch/x86/kernel/machine_kexec_32.c b/arch/x86/kernel/machine_kexec_32.c
index 00bc751c861c..edfede768688 100644
--- a/arch/x86/kernel/machine_kexec_32.c
+++ b/arch/x86/kernel/machine_kexec_32.c
@@ -48,8 +48,6 @@ static void load_segments(void)
"\tmovl $"STR(__KERNEL_DS)",%%eax\n"
"\tmovl %%eax,%%ds\n"
"\tmovl %%eax,%%es\n"
- "\tmovl %%eax,%%fs\n"
- "\tmovl %%eax,%%gs\n"
"\tmovl %%eax,%%ss\n"
: : : "eax", "memory");
#undef STR
@@ -232,8 +230,8 @@ void machine_kexec(struct kimage *image)
* The gdt & idt are now invalid.
* If you want to load them you must set up your own idt & gdt.
*/
- set_gdt(phys_to_virt(0), 0);
idt_invalidate(phys_to_virt(0));
+ set_gdt(phys_to_virt(0), 0);
/* now call it */
image->start = relocate_kernel_ptr((unsigned long)image->head,
diff --git a/arch/x86/kernel/stacktrace.c b/arch/x86/kernel/stacktrace.c
index 77835bc021c7..20161ef53537 100644
--- a/arch/x86/kernel/stacktrace.c
+++ b/arch/x86/kernel/stacktrace.c
@@ -164,8 +164,12 @@ int save_stack_trace_tsk_reliable(struct task_struct *tsk,
{
int ret;
+ /*
+ * If the task doesn't have a stack (e.g., a zombie), the stack is
+ * "reliably" empty.
+ */
if (!try_get_task_stack(tsk))
- return -EINVAL;
+ return 0;
ret = __save_stack_trace_reliable(trace, tsk);
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index f69dbd47d733..446c9ef8cfc3 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -361,7 +361,7 @@ dotraplinkage void do_double_fault(struct pt_regs *regs, long error_code)
*
* No need for ist_enter here because we don't use RCU.
*/
- if (((long)regs->sp >> PGDIR_SHIFT) == ESPFIX_PGD_ENTRY &&
+ if (((long)regs->sp >> P4D_SHIFT) == ESPFIX_PGD_ENTRY &&
regs->cs == __KERNEL_CS &&
regs->ip == (unsigned long)native_irq_return_iret)
{
diff --git a/arch/x86/mm/mem_encrypt.c b/arch/x86/mm/mem_encrypt.c
index d9a9e9fc75dd..391b13402e40 100644
--- a/arch/x86/mm/mem_encrypt.c
+++ b/arch/x86/mm/mem_encrypt.c
@@ -405,13 +405,13 @@ bool sme_active(void)
{
return sme_me_mask && !sev_enabled;
}
-EXPORT_SYMBOL_GPL(sme_active);
+EXPORT_SYMBOL(sme_active);
bool sev_active(void)
{
return sme_me_mask && sev_enabled;
}
-EXPORT_SYMBOL_GPL(sev_active);
+EXPORT_SYMBOL(sev_active);
static const struct dma_map_ops sev_dma_ops = {
.alloc = sev_alloc,
diff --git a/drivers/pci/host/pci-hyperv.c b/drivers/pci/host/pci-hyperv.c
index 04dac6a42c9f..6b8d060d07de 100644
--- a/drivers/pci/host/pci-hyperv.c
+++ b/drivers/pci/host/pci-hyperv.c
@@ -985,9 +985,7 @@ static u32 hv_compose_msi_req_v1(
int_pkt->wslot.slot = slot;
int_pkt->int_desc.vector = vector;
int_pkt->int_desc.vector_count = 1;
- int_pkt->int_desc.delivery_mode =
- (apic->irq_delivery_mode == dest_LowestPrio) ?
- dest_LowestPrio : dest_Fixed;
+ int_pkt->int_desc.delivery_mode = dest_Fixed;
/*
* Create MSI w/ dummy vCPU set, overwritten by subsequent retarget in
@@ -1008,9 +1006,7 @@ static u32 hv_compose_msi_req_v2(
int_pkt->wslot.slot = slot;
int_pkt->int_desc.vector = vector;
int_pkt->int_desc.vector_count = 1;
- int_pkt->int_desc.delivery_mode =
- (apic->irq_delivery_mode == dest_LowestPrio) ?
- dest_LowestPrio : dest_Fixed;
+ int_pkt->int_desc.delivery_mode = dest_Fixed;
/*
* Create MSI w/ dummy vCPU set targeting just one vCPU, overwritten