diff options
| author | Juergen Gross <jgross@suse.com> | 2021-01-25 14:42:07 +0100 |
|---|---|---|
| committer | Juergen Gross <jgross@suse.com> | 2021-01-27 15:45:29 +0100 |
| commit | 2e92493637a09547734f92c62a2471f6f0cb9a2c (patch) | |
| tree | 84f11a124b645b912e8e24203b6a6de1c58d5a18 /drivers/xen | |
| parent | 5f46400f7a6a4fad635d5a79e2aa5a04a30ffea1 (diff) | |
x86/xen: avoid warning in Xen pv guest with CONFIG_AMD_MEM_ENCRYPT enabled
When booting a kernel which has been built with CONFIG_AMD_MEM_ENCRYPT
enabled as a Xen pv guest a warning is issued for each processor:
[ 5.964347] ------------[ cut here ]------------
[ 5.968314] WARNING: CPU: 0 PID: 1 at /home/gross/linux/head/arch/x86/xen/enlighten_pv.c:660 get_trap_addr+0x59/0x90
[ 5.972321] Modules linked in:
[ 5.976313] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G W 5.11.0-rc5-default #75
[ 5.980313] Hardware name: Dell Inc. OptiPlex 9020/0PC5F7, BIOS A05 12/05/2013
[ 5.984313] RIP: e030:get_trap_addr+0x59/0x90
[ 5.988313] Code: 42 10 83 f0 01 85 f6 74 04 84 c0 75 1d b8 01 00 00 00 c3 48 3d 00 80 83 82 72 08 48 3d 20 81 83 82 72 0c b8 01 00 00 00 eb db <0f> 0b 31 c0 c3 48 2d 00 80 83 82 48 ba 72 1c c7 71 1c c7 71 1c 48
[ 5.992313] RSP: e02b:ffffc90040033d38 EFLAGS: 00010202
[ 5.996313] RAX: 0000000000000001 RBX: ffffffff82a141d0 RCX: ffffffff8222ec38
[ 6.000312] RDX: ffffffff8222ec38 RSI: 0000000000000005 RDI: ffffc90040033d40
[ 6.004313] RBP: ffff8881003984a0 R08: 0000000000000007 R09: ffff888100398000
[ 6.008312] R10: 0000000000000007 R11: ffffc90040246000 R12: ffff8884082182a8
[ 6.012313] R13: 0000000000000100 R14: 000000000000001d R15: ffff8881003982d0
[ 6.016316] FS: 0000000000000000(0000) GS:ffff888408200000(0000) knlGS:0000000000000000
[ 6.020313] CS: e030 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 6.024313] CR2: ffffc900020ef000 CR3: 000000000220a000 CR4: 0000000000050660
[ 6.028314] Call Trace:
[ 6.032313] cvt_gate_to_trap.part.7+0x3f/0x90
[ 6.036313] ? asm_exc_double_fault+0x30/0x30
[ 6.040313] xen_convert_trap_info+0x87/0xd0
[ 6.044313] xen_pv_cpu_up+0x17a/0x450
[ 6.048313] bringup_cpu+0x2b/0xc0
[ 6.052313] ? cpus_read_trylock+0x50/0x50
[ 6.056313] cpuhp_invoke_callback+0x80/0x4c0
[ 6.060313] _cpu_up+0xa7/0x140
[ 6.064313] cpu_up+0x98/0xd0
[ 6.068313] bringup_nonboot_cpus+0x4f/0x60
[ 6.072313] smp_init+0x26/0x79
[ 6.076313] kernel_init_freeable+0x103/0x258
[ 6.080313] ? rest_init+0xd0/0xd0
[ 6.084313] kernel_init+0xa/0x110
[ 6.088313] ret_from_fork+0x1f/0x30
[ 6.092313] ---[ end trace be9ecf17dceeb4f3 ]---
Reason is that there is no Xen pv trap entry for X86_TRAP_VC.
Fix that by adding a generic trap handler for unknown traps and wire all
unknown bare metal handlers to this generic handler, which will just
crash the system in case such a trap will ever happen.
Fixes: 0786138c78e793 ("x86/sev-es: Add a Runtime #VC Exception Handler")
Cc: <stable@vger.kernel.org> # v5.10
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Diffstat (limited to 'drivers/xen')
0 files changed, 0 insertions, 0 deletions