kernel_optimize_test/arch/x86/xen
Juergen Gross 1a5a3ba21a xen: reset legacy rtc flag for PV domU
commit f68aa100d815b5b4467fd1c3abbe3b99d65fd028 upstream.

A Xen PV guest doesn't have a legacy RTC device, so reset the legacy
RTC flag. Otherwise the following WARN splat will occur at boot:

[    1.333404] WARNING: CPU: 1 PID: 1 at /home/gross/linux/head/drivers/rtc/rtc-mc146818-lib.c:25 mc146818_get_time+0x1be/0x210
[    1.333404] Modules linked in:
[    1.333404] CPU: 1 PID: 1 Comm: swapper/0 Tainted: G        W         5.14.0-rc7-default+ #282
[    1.333404] RIP: e030:mc146818_get_time+0x1be/0x210
[    1.333404] Code: c0 64 01 c5 83 fd 45 89 6b 14 7f 06 83 c5 64 89 6b 14 41 83 ec 01 b8 02 00 00 00 44 89 63 10 5b 5d 41 5c 41 5d 41 5e 41 5f c3 <0f> 0b 48 c7 c7 30 0e ef 82 4c 89 e6 e8 71 2a 24 00 48 c7 c0 ff ff
[    1.333404] RSP: e02b:ffffc90040093df8 EFLAGS: 00010002
[    1.333404] RAX: 00000000000000ff RBX: ffffc90040093e34 RCX: 0000000000000000
[    1.333404] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 000000000000000d
[    1.333404] RBP: ffffffff82ef0e30 R08: ffff888005013e60 R09: 0000000000000000
[    1.333404] R10: ffffffff82373e9b R11: 0000000000033080 R12: 0000000000000200
[    1.333404] R13: 0000000000000000 R14: 0000000000000002 R15: ffffffff82cdc6d4
[    1.333404] FS:  0000000000000000(0000) GS:ffff88807d440000(0000) knlGS:0000000000000000
[    1.333404] CS:  10000e030 DS: 0000 ES: 0000 CR0: 0000000080050033
[    1.333404] CR2: 0000000000000000 CR3: 000000000260a000 CR4: 0000000000050660
[    1.333404] Call Trace:
[    1.333404]  ? wakeup_sources_sysfs_init+0x30/0x30
[    1.333404]  ? rdinit_setup+0x2b/0x2b
[    1.333404]  early_resume_init+0x23/0xa4
[    1.333404]  ? cn_proc_init+0x36/0x36
[    1.333404]  do_one_initcall+0x3e/0x200
[    1.333404]  kernel_init_freeable+0x232/0x28e
[    1.333404]  ? rest_init+0xd0/0xd0
[    1.333404]  kernel_init+0x16/0x120
[    1.333404]  ret_from_fork+0x1f/0x30

Cc: <stable@vger.kernel.org>
Fixes: 8d152e7a5c ("x86/rtc: Replace paravirt rtc check with platform legacy quirk")
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lore.kernel.org/r/20210903084937.19392-3-jgross@suse.com
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-09-22 12:27:54 +02:00
..
apic.c
debugfs.c
debugfs.h
efi.c
enlighten_hvm.c
enlighten_pv.c xen: reset legacy rtc flag for PV domU 2021-09-22 12:27:54 +02:00
enlighten_pvh.c
enlighten.c
grant-table.c
irq.c
Kconfig
Makefile
mmu_hvm.c
mmu_pv.c
mmu.c
mmu.h
multicalls.c
multicalls.h
p2m.c xen: fix setting of max_pfn in shared_info 2021-09-18 13:40:06 +02:00
pci-swiotlb-xen.c
platform-pci-unplug.c
pmu.c
pmu.h
setup.c Revert "xen: fix p2m size in dom0 for disabled memory hotplug case" 2021-03-30 14:32:08 +02:00
smp_hvm.c x86/xen: fix 'nopvspin' build error 2021-01-27 11:55:04 +01:00
smp_pv.c
smp.c
smp.h
spinlock.c
suspend_hvm.c
suspend_pv.c
suspend.c
time.c
trace.c
vga.c
xen-asm.S x86/xen: avoid warning in Xen pv guest with CONFIG_AMD_MEM_ENCRYPT enabled 2021-02-03 23:28:38 +01:00
xen-head.S
xen-ops.h