Messages in this thread Patch in this message | | | Date | Thu, 5 Mar 2015 18:02:55 +0100 | From | Ingo Molnar <> | Subject | [GIT PULL] x86 fixes |
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Linus,
Please pull the latest x86-urgent-for-linus git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-urgent-for-linus
# HEAD: 9ab6eb51ef4ad63cb71533d3a4dfb09ea8f69b4c x86/intel/quark: Select COMMON_CLK
Misc fixes: EFI fixes, an Intel Quark fix and an asm fix.
out-of-topic modifications in x86-urgent-for-linus: ----------------------------------------------------- drivers/firmware/dmi_scan.c # 6d9ff4733172: firmware: dmi_scan: Fix dmi_ # ce204e9a4bd8: firmware: dmi_scan: Fix dmi drivers/firmware/efi/libstub/efi-stub-helper.c# 7ed620bb343f: efi/libstub: Fix boundary ch
Thanks,
Ingo
------------------> Andy Lutomirski (1): x86/asm/entry/64: Remove a bogus 'ret_from_fork' optimization
Andy Shevchenko (1): x86/intel/quark: Select COMMON_CLK
Ivan Khoronzhuk (2): firmware: dmi_scan: Fix dmi scan to handle "End of Table" structure firmware: dmi_scan: Fix dmi_len type
Yinghai Lu (1): efi/libstub: Fix boundary checking in efi_high_alloc()
arch/x86/Kconfig | 1 + arch/x86/kernel/entry_64.S | 13 ++++++++----- drivers/firmware/dmi_scan.c | 17 +++++++++-------- drivers/firmware/efi/libstub/efi-stub-helper.c | 8 ++++---- 4 files changed, 22 insertions(+), 17 deletions(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index c2fb8a87dccb..b7d31ca55187 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -499,6 +499,7 @@ config X86_INTEL_QUARK depends on X86_IO_APIC select IOSF_MBI select INTEL_IMR + select COMMON_CLK ---help--- Select to include support for Quark X1000 SoC. Say Y here if you have a Quark based system such as the Arduino diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index 10074ad9ebf8..1d74d161687c 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -269,11 +269,14 @@ ENTRY(ret_from_fork) testl $3, CS-ARGOFFSET(%rsp) # from kernel_thread? jz 1f - testl $_TIF_IA32, TI_flags(%rcx) # 32-bit compat task needs IRET - jnz int_ret_from_sys_call - - RESTORE_TOP_OF_STACK %rdi, -ARGOFFSET - jmp ret_from_sys_call # go to the SYSRET fastpath + /* + * By the time we get here, we have no idea whether our pt_regs, + * ti flags, and ti status came from the 64-bit SYSCALL fast path, + * the slow path, or one of the ia32entry paths. + * Use int_ret_from_sys_call to return, since it can safely handle + * all of the above. + */ + jmp int_ret_from_sys_call 1: subq $REST_SKIP, %rsp # leave space for volatiles diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c index c5f7b4e9eb6c..69fac068669f 100644 --- a/drivers/firmware/dmi_scan.c +++ b/drivers/firmware/dmi_scan.c @@ -78,7 +78,7 @@ static const char * __init dmi_string(const struct dmi_header *dm, u8 s) * We have to be cautious here. We have seen BIOSes with DMI pointers * pointing to completely the wrong place for example */ -static void dmi_table(u8 *buf, int len, int num, +static void dmi_table(u8 *buf, u32 len, int num, void (*decode)(const struct dmi_header *, void *), void *private_data) { @@ -93,12 +93,6 @@ static void dmi_table(u8 *buf, int len, int num, const struct dmi_header *dm = (const struct dmi_header *)data; /* - * 7.45 End-of-Table (Type 127) [SMBIOS reference spec v3.0.0] - */ - if (dm->type == DMI_ENTRY_END_OF_TABLE) - break; - - /* * We want to know the total length (formatted area and * strings) before decoding to make sure we won't run off the * table in dmi_decode or dmi_string @@ -108,13 +102,20 @@ static void dmi_table(u8 *buf, int len, int num, data++; if (data - buf < len - 1) decode(dm, private_data); + + /* + * 7.45 End-of-Table (Type 127) [SMBIOS reference spec v3.0.0] + */ + if (dm->type == DMI_ENTRY_END_OF_TABLE) + break; + data += 2; i++; } } static phys_addr_t dmi_base; -static u16 dmi_len; +static u32 dmi_len; static u16 dmi_num; static int __init dmi_walk_early(void (*decode)(const struct dmi_header *, diff --git a/drivers/firmware/efi/libstub/efi-stub-helper.c b/drivers/firmware/efi/libstub/efi-stub-helper.c index 2fe195002021..f07d4a67fa76 100644 --- a/drivers/firmware/efi/libstub/efi-stub-helper.c +++ b/drivers/firmware/efi/libstub/efi-stub-helper.c @@ -179,12 +179,12 @@ efi_status_t efi_high_alloc(efi_system_table_t *sys_table_arg, start = desc->phys_addr; end = start + desc->num_pages * (1UL << EFI_PAGE_SHIFT); - if ((start + size) > end || (start + size) > max) - continue; - - if (end - size > max) + if (end > max) end = max; + if ((start + size) > end) + continue; + if (round_down(end - size, align) < start) continue;
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