Juergen Gross 2e92493637 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: 0786138c78 ("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>		2021-01-27 15:45:29 +01:00
..
boot	A set of fixes for x86:	2020-12-06 11:22:39 -08:00
configs	* A defconfig fix, from Daniel Díaz.	2020-09-20 15:06:43 -07:00
crypto	crypto: x86/poly1305 - add back a needed assignment	2020-10-24 09:38:32 +11:00
entry	A couple of x86 fixes which missed rc1 due to my stupidity:	2020-10-27 14:39:29 -07:00
events	perf/x86/intel: Check PEBS status correctly	2020-12-03 10:00:26 +01:00
hyperv	hyperv-fixes for 5.10-rc3	2020-11-05 11:32:03 -08:00
ia32	x86: remove address space overrides using set_fs()	2020-09-08 22:21:36 -04:00
include	x86/xen: avoid warning in Xen pv guest with CONFIG_AMD_MEM_ENCRYPT enabled	2021-01-27 15:45:29 +01:00
kernel	x86/kprobes: Fix optprobe to detect INT3 padding correctly	2020-12-12 15:25:17 +01:00
kvm	Bugfixes for ARM, x86 and tools.	2020-12-12 10:08:16 -08:00
lib	x86/insn-eval: Use new for_each_insn_prefix() macro to loop over prefixes bytes	2020-12-06 10:03:08 +01:00
math-emu	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
mm	x86/mm/mem_encrypt: Fix definition of PMD_FLAGS_DEC_WP	2020-12-10 12:28:06 +01:00
net	bpf: x64: Do not emit sub/add 0, %rsp when !stack_depth	2020-09-29 16:47:39 -07:00
oprofile
pci	pci-v5.10-changes	2020-10-22 12:41:00 -07:00
platform	efi/x86: Free efi_pgd with free_pages()	2020-11-10 19:18:11 +01:00
power	Kbuild updates for v5.9	2020-08-09 14:10:26 -07:00
purgatory	treewide: Convert macro and uses of __section(foo) to __section("foo")	2020-10-25 14:51:49 -07:00
ras
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/xen: avoid warning in Xen pv guest with CONFIG_AMD_MEM_ENCRYPT enabled	2021-01-27 15:45:29 +01:00
.gitignore
Kbuild
Kconfig	kbuild: Hoist '--orphan-handling' into Kconfig	2020-12-01 22:45:36 +09:00
Kconfig.assembler
Kconfig.cpu
Kconfig.debug	x86, powerpc: Rename memcpy_mcsafe() to copy_mc_to_{user, kernel}()	2020-10-06 11:18:04 +02:00
Makefile	kbuild: Hoist '--orphan-handling' into Kconfig	2020-12-01 22:45:36 +09:00
Makefile.um
Makefile_32.cpu