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linux/arch/x86/xen
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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
..
apic.c x86/apic: Cleanup destination mode 2020-10-28 20:26:25 +01:00
debugfs.c x86: xen: no need to check return value of debugfs_create functions 2019-06-03 15:49:07 +02:00
debugfs.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
efi.c efi: x86/xen: switch to efi_get_secureboot_mode helper 2020-11-17 15:09:32 +01:00
enlighten.c treewide: Convert macro and uses of __section(foo) to __section("foo") 2020-10-25 14:51:49 -07:00
enlighten_hvm.c x86/xen: Don't register Xen IPIs when they aren't going to be used 2021-01-13 16:12:07 +01:00
enlighten_pv.c x86/pv: Switch SWAPGS to ALTERNATIVE 2021-02-10 12:25:49 +01:00
enlighten_pvh.c treewide: Convert macro and uses of __section(foo) to __section("foo") 2020-10-25 14:51:49 -07:00
grant-table.c x86/xen: open code alloc_vm_area in arch_gnttab_valloc 2020-10-18 09:27:10 -07:00
irq.c x86/paravirt: Use a single ops structure 2018-09-03 16:50:35 +02:00
Kconfig xen: Kconfig: remove X86_64 depends from XEN_512GB 2020-12-19 07:27:37 +01:00
Makefile xen: branch for v5.9-rc1b 2020-08-14 13:34:37 -07:00
mmu.c x86/xen: Add SPDX identifier in arch/x86/xen files 2018-09-03 16:50:33 +02:00
mmu.h mm: update ptep_modify_prot_start/commit to take vm_area_struct as arg 2019-03-05 21:07:18 -08:00
mmu_hvm.c x86/paravirt: Use a single ops structure 2018-09-03 16:50:35 +02:00
mmu_pv.c xen: branch for v5.10-rc1 2020-10-14 10:34:45 -07:00
multicalls.c treewide: Switch printk users from %pf and %pF to %ps and %pS, respectively 2019-04-09 14:19:06 +02:00
multicalls.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
p2m.c x86/xen: Convert to DEFINE_SHOW_ATTRIBUTE 2020-12-16 07:53:53 +01:00
pci-swiotlb-xen.c dma-mapping: split <linux/dma-mapping.h> 2020-10-06 07:07:03 +02:00
platform-pci-unplug.c xen/pvh: don't try to unplug emulated devices 2018-10-26 09:16:57 +02:00
pmu.c Merge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-10-23 16:16:40 +01:00
pmu.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
setup.c x86/xen: remove 32-bit Xen PV guest support 2020-08-11 08:26:48 +02:00
smp.c xen/events: only register debug interrupt for 2-level events 2020-10-23 05:41:25 -05:00
smp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
smp_hvm.c x86/xen: fix 'nopvspin' build error 2021-01-18 07:22:20 +01:00
smp_pv.c xen: branch for v5.9-rc1b 2020-08-14 13:34:37 -07:00
spinlock.c x86/xen: don't unbind uninitialized lock_kicker_irq 2020-11-09 07:43:45 -06:00
suspend.c x86/xen: Zero MSR_IA32_SPEC_CTRL before suspend 2018-02-28 16:03:19 +01:00
suspend_hvm.c xen: Move xen_setup_callback_vector() definition to include/xen/hvm.h 2020-06-11 15:15:19 +02:00
suspend_pv.c locking/seqlock, headers: Untangle the spaghetti monster 2020-08-06 16:13:13 +02:00
time.c x86/xen/time: Set the X86_FEATURE_TSC_KNOWN_FREQ flag in xen_tsc_khz() 2020-07-25 15:49:41 +02:00
trace.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
vga.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xen-asm.S x86/xen: Use specific Xen pv interrupt entry for DF 2021-02-10 12:13:40 +01:00
xen-head.S x86/xen: remove 32-bit Xen PV guest support 2020-08-11 08:26:48 +02:00
xen-ops.h xen/events: only register debug interrupt for 2-level events 2020-10-23 05:41:25 -05:00