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2f62f36e62
linux/arch/x86/xen
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Miroslav Benes 2f62f36e62 x86/xen: Make the boot CPU idle task reliable 
The unwinder reports the boot CPU idle task's stack on XEN PV as
unreliable, which affects at least live patching. There are two reasons
for this. First, the task does not follow the x86 convention that its
stack starts at the offset right below saved pt_regs. It allows the
unwinder to easily detect the end of the stack and verify it. Second,
startup_xen() function does not store the return address before jumping
to xen_start_kernel() which confuses the unwinder.

Amend both issues by moving the starting point of initial stack in
startup_xen() and storing the return address before the jump, which is
exactly what call instruction does.

Signed-off-by: Miroslav Benes <mbenes@suse.cz>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
2020-03-30 17:32:04 +02:00
..
apic.c Merge branch 'WIP.x86/asm' into x86/urgent, because the topic is ready 2018-04-12 09:42:34 +02:00
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/libstub: Use stricter typing for firmware function pointers 2019-12-25 10:49:18 +01:00
enlighten_hvm.c x86/xen: Add "nopv" support for HVM guest 2019-07-17 08:09:59 +02:00
enlighten_pv.c x86/ioperm: Add new paravirt function update_io_bitmap() 2020-02-29 12:43:09 +01:00
enlighten_pvh.c xen/pvh: correctly setup the PV EFI interface for dom0 2019-04-25 10:36:25 -04:00
enlighten.c x86/xen: Return from panic notifier 2019-10-07 17:53:30 -04:00
grant-table.c x86/xen: Add SPDX identifier in arch/x86/xen files 2018-09-03 16:50:33 +02:00
irq.c x86/paravirt: Use a single ops structure 2018-09-03 16:50:35 +02:00
Kconfig x86/Kconfig: Fix Kconfig indentation 2019-12-10 18:43:21 +01:00
Makefile xen/pvh: Create a new file for Xen specific PVH code 2018-12-13 13:41:49 -05:00
mmu_hvm.c x86/paravirt: Use a single ops structure 2018-09-03 16:50:35 +02:00
mmu_pv.c x86/mm/pat: Rename <asm/pat.h> => <asm/memtype.h> 2019-12-10 10:12:55 +01:00
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
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: no need to check return value of debugfs_create functions 2019-06-03 15:49:07 +02:00
pci-swiotlb-xen.c x86/xen: Add SPDX identifier in arch/x86/xen files 2018-09-03 16:50:33 +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: Use pr_warn instead of pr_warning 2019-10-18 15:00:18 +02:00
smp_hvm.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
smp_pv.c x86/asm: Move native_write_cr0/4() out of line 2019-07-10 22:15:05 +02:00
smp.c x86/xen: Calculate __max_logical_packages on PV domains 2018-02-17 09:40:45 +01:00
smp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
spinlock.c Revert "x86/paravirt: Set up the virt_spin_lock_key after static keys get initialized" 2019-07-17 08:09:57 +02:00
suspend_hvm.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
suspend_pv.c x86/xen/time: Initialize pv xen time in init_hypervisor_platform() 2018-07-20 00:02:39 +02:00
suspend.c x86/xen: Zero MSR_IA32_SPEC_CTRL before suspend 2018-02-28 16:03:19 +01:00
time.c x86/xen: Add "xen_timer_slop" command line option 2019-04-23 11:06:26 -04:00
trace.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
vdso.h x86/xen: Add SPDX identifier in arch/x86/xen files 2018-09-03 16:50:33 +02:00
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_32.S Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-11-26 10:42:40 -08:00
xen-asm_64.S x86/asm: Change all ENTRY+ENDPROC to SYM_FUNC_* 2019-10-18 11:58:33 +02:00
xen-asm.S x86/asm: Change all ENTRY+ENDPROC to SYM_FUNC_* 2019-10-18 11:58:33 +02:00
xen-head.S x86/xen: Make the boot CPU idle task reliable 2020-03-30 17:32:04 +02:00
xen-ops.h x86/paravirt: Make read_cr2() CALLEE_SAVE 2019-07-17 23:17:37 +02:00