AuxXxilium/linux_dsm_epyc7002
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Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

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Pull x86 "urgent" leftovers from Ingo Molnar:
 "Pending x86/urgent bits that were not high prio enough to warrant
  -rc-less v3.3-final inclusion."

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86, efi: Fix pointer math issue in handle_ramdisks()
  x86/ioapic: Add register level checks to detect bogus io-apic entries
  x86, mce: Fix rcu splat in drain_mce_log_buffer()
  x86, memblock: Move mem_hole_size() to .init
This commit is contained in:
Linus Torvalds 2012-03-22 09:44:50 -07:00
commit 28f23d1f3b
4 changed files with 38 additions and 14 deletions
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8
arch/x86/boot/compressed/eboot.c
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@ -539,7 +539,7 @@ static efi_status_t handle_ramdisks(efi_loaded_image_t *image,
struct initrd *initrd;
efi_file_handle_t *h;
efi_file_info_t *info;
efi_char16_t filename[256];
efi_char16_t filename_16[256];
unsigned long info_sz;
efi_guid_t info_guid = EFI_FILE_INFO_ID;
efi_char16_t *p;
@ -552,14 +552,14 @@ static efi_status_t handle_ramdisks(efi_loaded_image_t *image,
str += 7;
initrd = &initrds[i];
p = filename;
p = filename_16;
/* Skip any leading slashes */
while (*str == '/' || *str == '\\')
str++;
while (*str && *str != ' ' && *str != '\n') {
if (p >= filename + sizeof(filename))
if ((u8 *)p >= (u8 *)filename_16 + sizeof(filename_16))
break;
*p++ = *str++;
@ -583,7 +583,7 @@ static efi_status_t handle_ramdisks(efi_loaded_image_t *image,
goto free_initrds;
}
status = efi_call_phys5(fh->open, fh, &h, filename,
status = efi_call_phys5(fh->open, fh, &h, filename_16,
EFI_FILE_MODE_READ, (u64)0);
if (status != EFI_SUCCESS)
goto close_handles;

40
arch/x86/kernel/apic/io_apic.c
View File

@ -3967,18 +3967,36 @@ int mp_find_ioapic_pin(int ioapic, u32 gsi)
static __init int bad_ioapic(unsigned long address)
{
if (nr_ioapics >= MAX_IO_APICS) {
printk(KERN_WARNING "WARNING: Max # of I/O APICs (%d) exceeded "
"(found %d), skipping\n", MAX_IO_APICS, nr_ioapics);
pr_warn("WARNING: Max # of I/O APICs (%d) exceeded (found %d), skipping\n",
MAX_IO_APICS, nr_ioapics);
return 1;
}
if (!address) {
printk(KERN_WARNING "WARNING: Bogus (zero) I/O APIC address"
" found in table, skipping!\n");
pr_warn("WARNING: Bogus (zero) I/O APIC address found in table, skipping!\n");
return 1;
}
return 0;
}
static __init int bad_ioapic_register(int idx)
{
union IO_APIC_reg_00 reg_00;
union IO_APIC_reg_01 reg_01;
union IO_APIC_reg_02 reg_02;
reg_00.raw = io_apic_read(idx, 0);
reg_01.raw = io_apic_read(idx, 1);
reg_02.raw = io_apic_read(idx, 2);
if (reg_00.raw == -1 && reg_01.raw == -1 && reg_02.raw == -1) {
pr_warn("I/O APIC 0x%x registers return all ones, skipping!\n",
mpc_ioapic_addr(idx));
return 1;
}
return 0;
}
void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
{
int idx = 0;
@ -3995,6 +4013,12 @@ void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
ioapics[idx].mp_config.apicaddr = address;
set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
if (bad_ioapic_register(idx)) {
clear_fixmap(FIX_IO_APIC_BASE_0 + idx);
return;
}
ioapics[idx].mp_config.apicid = io_apic_unique_id(id);
ioapics[idx].mp_config.apicver = io_apic_get_version(idx);
@ -4015,10 +4039,10 @@ void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
if (gsi_cfg->gsi_end >= gsi_top)
gsi_top = gsi_cfg->gsi_end + 1;
printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%x, "
"GSI %d-%d\n", idx, mpc_ioapic_id(idx),
mpc_ioapic_ver(idx), mpc_ioapic_addr(idx),
gsi_cfg->gsi_base, gsi_cfg->gsi_end);
pr_info("IOAPIC[%d]: apic_id %d, version %d, address 0x%x, GSI %d-%d\n",
idx, mpc_ioapic_id(idx),
mpc_ioapic_ver(idx), mpc_ioapic_addr(idx),
gsi_cfg->gsi_base, gsi_cfg->gsi_end);
nr_ioapics++;
}

2
arch/x86/kernel/cpu/mcheck/mce.c
View File

@ -191,7 +191,7 @@ static void drain_mcelog_buffer(void)
{
unsigned int next, i, prev = 0;
next = rcu_dereference_check_mce(mcelog.next);
next = ACCESS_ONCE(mcelog.next);
do {
struct mce *m;

2
arch/x86/mm/numa_emulation.c
View File

@ -28,7 +28,7 @@ static int __init emu_find_memblk_by_nid(int nid, const struct numa_meminfo *mi)
return -ENOENT;
}
static u64 mem_hole_size(u64 start, u64 end)
static u64 __init mem_hole_size(u64 start, u64 end)
{
unsigned long start_pfn = PFN_UP(start);
unsigned long end_pfn = PFN_DOWN(end);