Bingsong Si 76ecd7a514 i386: Fix legacy guest with xsave panic on host kvm without update cpuid. ... without kvm commit 412a3c41, CPUID(EAX=0xd,ECX=0).EBX always equal to 0 even through guest update xcr0, this will crash legacy guest(e.g., CentOS 6). Below is the call trace on the guest. [ 0.000000] kernel BUG at mm/bootmem.c:469! [ 0.000000] invalid opcode: 0000 [#1] SMP [ 0.000000] last sysfs file: [ 0.000000] CPU 0 [ 0.000000] Modules linked in: [ 0.000000] [ 0.000000] Pid: 0, comm: swapper Tainted: G --------------- H 2.6.32-279#2 Red Hat KVM [ 0.000000] RIP: 0010:[<ffffffff81c4edc4>] [<ffffffff81c4edc4>] alloc_bootmem_core+0x7b/0x29e [ 0.000000] RSP: 0018:ffffffff81a01cd8 EFLAGS: 00010046 [ 0.000000] RAX: ffffffff81cb1748 RBX: ffffffff81cb1720 RCX: 0000000001000000 [ 0.000000] RDX: 0000000000000040 RSI: 0000000000000000 RDI: ffffffff81cb1720 [ 0.000000] RBP: ffffffff81a01d38 R08: 0000000000000000 R09: 0000000000001000 [ 0.000000] R10: 02008921da802087 R11: 00000000ffff8800 R12: 0000000000000000 [ 0.000000] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000001000000 [ 0.000000] FS: 0000000000000000(0000) GS:ffff880002200000(0000) knlGS:0000000000000000 [ 0.000000] CS: 0010 DS: 0018 ES: 0018 CR0: 0000000080050033 [ 0.000000] CR2: 0000000000000000 CR3: 0000000001a85000 CR4: 00000000001406b0 [ 0.000000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 0.000000] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 0.000000] Process swapper (pid: 0, threadinfo ffffffff81a00000, task ffffffff81a8d020) [ 0.000000] Stack: [ 0.000000] 0000000000000002 81a01dd881eaf060 000000007e5fe227 0000000000001001 [ 0.000000] <d> 0000000000000040 0000000000000001 0000006cffffffff 0000000001000000 [ 0.000000] <d> ffffffff81cb1720 0000000000000000 0000000000000000 0000000000000000 [ 0.000000] Call Trace: [ 0.000000] [<ffffffff81c4f074>] ___alloc_bootmem_nopanic+0x8d/0xca [ 0.000000] [<ffffffff81c4f0cf>] ___alloc_bootmem+0x11/0x39 [ 0.000000] [<ffffffff81c4f172>] __alloc_bootmem+0xb/0xd [ 0.000000] [<ffffffff814d42d9>] xsave_cntxt_init+0x249/0x2c0 [ 0.000000] [<ffffffff814e0689>] init_thread_xstate+0x17/0x25 [ 0.000000] [<ffffffff814e0710>] fpu_init+0x79/0xaa [ 0.000000] [<ffffffff814e27e3>] cpu_init+0x301/0x344 [ 0.000000] [<ffffffff81276395>] ? sort+0x155/0x230 [ 0.000000] [<ffffffff81c30cf2>] trap_init+0x24e/0x25f [ 0.000000] [<ffffffff81c2bd73>] start_kernel+0x21c/0x430 [ 0.000000] [<ffffffff81c2b33a>] x86_64_start_reservations+0x125/0x129 [ 0.000000] [<ffffffff81c2b438>] x86_64_start_kernel+0xfa/0x109 [ 0.000000] Code: 03 48 89 f1 49 c1 e8 0c 48 0f af d0 48 c7 c6 00 a6 61 81 48 c7 c7 00 e5 79 81 31 c0 4c 89 74 24 08 e8 f2 d7 89 ff 4d 85 e4 75 04 <0f> 0b eb fe 48 8b 45 c0 48 83 e8 01 48 85 45 c0 74 04 0f 0b eb Signed-off-by: Bingsong Si <owen.si@ucloud.cn> Message-Id: <20190822042901.16858-1-owen.si@ucloud.cn> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>		2019-10-15 18:34:44 -03:00
..
alpha	target/alpha: Tidy helper_fp_exc_raise_s	2019-09-26 19:00:53 +01:00
arm	target/arm/arm-semi: Implement SH_EXT_STDOUT_STDERR extension	2019-10-15 18:09:04 +01:00
cris	Monitor patches for 2019-08-21	2019-08-22 10:31:21 +01:00
hppa	target/hppa: prevent trashing of temporary in do_depw_sar()	2019-09-14 15:39:24 -04:00
i386	i386: Fix legacy guest with xsave panic on host kvm without update cpuid.	2019-10-15 18:34:44 -03:00
lm32	Monitor patches for 2019-08-21	2019-08-22 10:31:21 +01:00
m68k	target/m68k/fpu_helper.c: rename the access arguments	2019-09-19 12:12:19 +02:00
microblaze	tcg: TCGMemOp is now accelerator independent MemOp	2019-09-03 08:30:38 -07:00
mips	target/mips: msa: Move helpers for <AND|NOR|OR|XOR>.V	2019-10-01 16:58:45 +02:00
moxie	hw/core: Move cpu.c, cpu.h from qom/ to hw/core/	2019-08-21 13:24:01 +02:00
nios2	Monitor patches for 2019-08-21	2019-08-22 10:31:21 +01:00
openrisc	target/openrisc: Update cpu "any" to v1.3	2019-09-04 13:01:56 -07:00
ppc	target/ppc: use Vsr macros in BCD helpers	2019-10-04 19:08:21 +10:00
riscv	gdbstub: riscv: fix the fflags registers	2019-09-17 08:42:50 -07:00
s390x	s390x/tcg: MVCL: Exit to main loop if requested	2019-10-10 12:27:15 +02:00
sh4	Monitor patches for 2019-08-21	2019-08-22 10:31:21 +01:00
sparc	target/sparc: Switch to do_transaction_failed() hook	2019-09-17 12:01:00 +01:00
tilegx	tcg: TCGMemOp is now accelerator independent MemOp	2019-09-03 08:30:38 -07:00
tricore	tcg: TCGMemOp is now accelerator independent MemOp	2019-09-03 08:30:38 -07:00
unicore32	Monitor patches for 2019-08-21	2019-08-22 10:31:21 +01:00
xtensa	target/xtensa: linux-user: add call0 ABI support	2019-09-11 08:47:06 +02:00