2
0
mirror of https://github.com/edk2-porting/linux-next.git synced 2025-01-23 14:13:58 +08:00
linux-next/arch/x86
Chang S. Bae 87ab4689ca x86/fsgsbase/64: Fix the base write helper functions
Andy spotted a regression in the fs/gs base helpers after the patch series
was committed. The helper functions which write fs/gs base are not just
writing the base, they are also changing the index. That's wrong and needs
to be separated because writing the base has not to modify the index.

While the regression is not causing any harm right now because the only
caller depends on that behaviour, it's a guarantee for subtle breakage down
the road.

Make the index explicitly changed from the caller, instead of including
the code in the helpers.

Subsequently, the task write helpers do not handle for the current task
anymore. The range check for a base value is also factored out, to minimize
code redundancy from the caller.

Fixes: b1378a561f ("x86/fsgsbase/64: Introduce FS/GS base helper functions")
Suggested-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Andy Lutomirski <luto@kernel.org>
Cc: "H . Peter Anvin" <hpa@zytor.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Ravi Shankar <ravi.v.shankar@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Link: https://lkml.kernel.org/r/20181126195524.32179-1-chang.seok.bae@intel.com
2018-12-18 14:26:09 +01:00
..
boot x86/boot: Mostly revert commit ae7e1238e6 ("Add ACPI RSDP address to setup_header") 2018-11-20 09:43:10 +01:00
configs x86/defconfig: Enable CONFIG_USB_XHCI_HCD=y 2018-10-10 08:29:51 +02:00
crypto crypto: x86/aes-ni - fix build error following fpu template removal 2018-10-08 13:47:02 +08:00
entry x86/vdso: Pass --eh-frame-hdr to the linker 2018-12-15 11:37:51 +01:00
events perf/x86/intel: Disallow precise_ip on BTS events 2018-11-22 09:45:10 +01:00
hyperv Merge branch 'x86-paravirt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-10-23 17:54:58 +01:00
ia32
include x86/fsgsbase/64: Fix the base write helper functions 2018-12-18 14:26:09 +01:00
kernel x86/fsgsbase/64: Fix the base write helper functions 2018-12-18 14:26:09 +01:00
kvm kvm: svm: Ensure an IBPB on all affected CPUs when freeing a vmcb 2018-11-27 12:50:42 +01:00
lib Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-10-23 15:24:22 +01:00
math-emu
mm x86/mm/cpa: Fix cpa_flush_array() TLB invalidation 2018-12-17 18:48:09 +01:00
net bpf, x32: Fix regression caused by commit 24dea04767 2018-07-26 02:51:12 +02:00
oprofile
pci mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
platform memblock: stop using implicit alignment to SMP_CACHE_BYTES 2018-10-31 08:54:16 -07:00
power mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
purgatory kbuild: move bin2c back to scripts/ from scripts/basic/ 2018-07-18 01:18:05 +09:00
ras
realmode
tools x86: Clean up 'sizeof x' => 'sizeof(x)' 2018-10-29 07:13:28 +01:00
um Merge branch 'core/urgent' into x86/urgent, to pick up objtool fix 2018-11-03 23:42:16 +01:00
video
xen x86/mm: Fix guard hole handling 2018-12-11 11:19:24 +01:00
.gitignore
Kbuild
Kconfig x86/Kconfig: Select SCHED_SMT if SMP enabled 2018-11-28 11:57:07 +01:00
Kconfig.cpu x86/cpu: Create Hygon Dhyana architecture support file 2018-09-27 16:14:05 +02:00
Kconfig.debug x86/kconfig: Remove redundant 'default n' lines from all x86 Kconfig's 2018-10-17 08:39:42 +02:00
Makefile x86/build: Fix compiler support check for CONFIG_RETPOLINE 2018-12-05 08:44:02 +01:00
Makefile_32.cpu
Makefile.um kbuild: rename LDFLAGS to KBUILD_LDFLAGS 2018-08-24 08:22:08 +09:00