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53c9d92409
linux/arch/x86
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Juergen Gross 53c9d92409 x86/pv: Switch SWAPGS to ALTERNATIVE 
SWAPGS is used only for interrupts coming from user mode or for
returning to user mode. So there is no reason to use the PARAVIRT
framework, as it can easily be replaced by an ALTERNATIVE depending
on X86_FEATURE_XENPV.

There are several instances using the PV-aware SWAPGS macro in paths
which are never executed in a Xen PV guest. Replace those with the
plain swapgs instruction. For SWAPGS_UNSAFE_STACK the same applies.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20210120135555.32594-5-jgross@suse.com
2021-02-10 12:25:49 +01:00
..
boot EFI updates collected by Ard Biesheuvel: 2020-12-24 12:40:07 -08:00
configs * A defconfig fix, from Daniel Díaz. 2020-09-20 15:06:43 -07:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2020-12-14 12:18:19 -08:00
entry x86/pv: Switch SWAPGS to ALTERNATIVE 2021-02-10 12:25:49 +01:00
events Perf updates: 2020-12-14 17:34:12 -08:00
hyperv x86/hyperv: Initialize clockevents after LAPIC is initialized 2021-01-17 15:20:50 +00:00
ia32 x86/ia32_signal: Propagate __user annotation properly 2020-12-11 19:44:31 +01:00
include x86/pv: Switch SWAPGS to ALTERNATIVE 2021-02-10 12:25:49 +01:00
kernel x86/pv: Switch SWAPGS to ALTERNATIVE 2021-02-10 12:25:49 +01:00
kvm KVM: x86: Set so called 'reserved CR3 bits in LM mask' at vCPU reset 2021-02-04 12:59:28 -05:00
lib x86/mmx: Use KFPU_387 for MMX string operations 2021-01-21 13:39:36 +01:00
math-emu treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
mm KVM: SVM: Treat SVM as unsupported when running as an SEV guest 2021-02-03 04:30:37 -05:00
net bpf: x64: Do not emit sub/add 0, %rsp when !stack_depth 2020-09-29 16:47:39 -07:00
oprofile x86/oprofile: Avoid TIF_IA32 when checking 64bit mode 2020-10-26 13:46:46 +01:00
pci ARM: SoC drivers for v5.11 2020-12-16 16:38:41 -08:00
platform x86/efi: Remove EFI PGD build time checks 2021-02-06 13:54:14 +01:00
power Kbuild updates for v5.9 2020-08-09 14:10:26 -07:00
purgatory crypto: sha - split sha.h into sha1.h and sha2.h 2020-11-20 14:45:33 +11:00
ras treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
realmode x86/head/64: Don't call verify_cpu() on starting APs 2020-09-09 11:33:20 +02:00
tools x86/insn: Make inat-tables.c suitable for pre-decompression code 2020-09-07 19:45:24 +02:00
um arch/um: partially revert the conversion to __section() macro 2020-10-26 15:39:37 -07:00
video
xen x86/pv: Switch SWAPGS to ALTERNATIVE 2021-02-10 12:25:49 +01:00
.gitignore
Kbuild
Kconfig fanotify: Fix sys_fanotify_mark() on native x86-32 2020-12-28 11:58:59 +01:00
Kconfig.assembler
Kconfig.cpu treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
Kconfig.debug x86, libnvdimm/test: Remove COPY_MC_TEST 2020-10-26 18:08:35 +01:00
Makefile x86/build: Disable CET instrumentation in the kernel 2021-01-29 18:41:06 +01:00
Makefile_32.cpu
Makefile.um