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Message-Id: <20230113073938.1066227-1-joanbrugueram@gmail.com>
Date: Fri, 13 Jan 2023 07:39:38 +0000
From: Joan Bruguera <joanbrugueram@...il.com>
To: Peter Zijlstra <peterz@...radead.org>
Cc: linux-kernel@...r.kernel.org, Juergen Gross <jgross@...e.com>,
"Rafael J. Wysocki" <rafael@...nel.org>,
xen-devel <xen-devel@...ts.xenproject.org>,
Jan Beulich <jbeulich@...e.com>,
Roger Pau Monne <roger.pau@...rix.com>,
Kees Cook <keescook@...omium.org>, mark.rutland@....com,
x86@...nel.org
Subject: Re: [RFC][PATCH 0/6] x86: Fix suspend vs retbleed=stuff
Hi Peter,
I tried your patches on both QEMU and my two (real) computers where
s2ram with `retbleed=stuff` was failing and they wake up fine now.
However, I think some minor reviews are needed:
(1) I got a build error due to a symbol conflict between the
`restore_registers` in `arch/x86/include/asm/suspend_64.h` and the
one in `drivers/gpu/drm/amd/display/dc/gpio/hw_gpio.c`.
(I fixed by renaming the one in `hw_gpio.c`, but it's worth
an `allmodconfig` just in case there's something else)
(2) Tracing with QEMU I still see two `sarq $5, %gs:0x1337B33F` before
`%gs` is restored. Those correspond to the calls from
`secondary_startup_64` in `arch/x86/kernel/head_64.S` to
`verify_cpu` and `sev_verify_cbit`.
Those don't cause a crash but look suspicious, are they correct?
(There are also some `sarq`s in the call to `early_setup_idt` from
`secondary_startup_64`, but `%gs` is restored immediately before)
I attach an annotated QEMU log for those if it is useful.
Regards,
- Joan
QEMU wakeup log:
# 32-bit code ellided. Next line calls `secondary_startup_64` from `startup_64`
0x0009a0d0: ff 25 2a 2f 00 00 jmpq *0x2f2a(%rip)
# Next line is `call verify_cpu` from `secondary_startup_64`
0xffffffff9a800070: e8 f1 00 00 00 callq 0xffffffff9a800166
# This next `sarq` does not have the correct GS set?
# RAX=0000000080050033 RBX=0000000000000800 RCX=00000000c0000080 RDX=0000000000000000
# RSI=0000000000000000 RDI=0000000000000001 RBP=0000000000000000 RSP=000000000009e018
# R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000
# R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000
# RIP=ffffffff9a800166 RFL=00200097 [--S-APC] CPL=0 II=0 A20=1 SMM=0 HLT=0
# ES =0018 0000000000000000 ffffffff 00cf9300 DPL=0 DS [-WA]
# CS =0010 0000000000000000 ffffffff 00af9b00 DPL=0 CS64 [-RA]
# SS =0018 0000000000000000 ffffffff 00cf9300 DPL=0 DS [-WA]
# DS =0018 0000000000000000 ffffffff 00cf9300 DPL=0 DS [-WA]
# FS =0018 0000000000000000 ffffffff 00cf9300 DPL=0 DS [-WA]
# GS =0018 0000000000000000 ffffffff 00cf9300 DPL=0 DS [-WA]
# LDT=0000 0000000000000000 0000ffff 00008200 DPL=0 LDT
# TR =0000 0000000000000000 0000ffff 00008b00 DPL=0 TSS64-busy
# GDT= 0000000000098030 0000001f
# IDT= 0000000000000000 00000000
# CR0=80050033 CR2=0000000000000000 CR3=000000000009c000 CR4=000006b0
# DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
# DR6=00000000ffff0ff0 DR7=0000000000000400
# CCS=0000000000000095 CCD=fffffffffffff6ff CCO=EFLAGS
# EFER=0000000000000d01
0xffffffff9a800166: 65 48 c1 3c 25 90 29 03 sarq $5, %gs:0x32990
0xffffffff9a80016e: 00 05
0xffffffff9a800170: 66 0f 1f 00 nopw (%rax)
0xffffffff9a800174: 9c pushfq
0xffffffff9a800175: 6a 00 pushq $0
0xffffffff9a800177: 9d popfq
0xffffffff9a800178: b8 00 00 00 00 movl $0, %eax
0xffffffff9a80017d: 0f a2 cpuid
0xffffffff9a80017f: 83 f8 01 cmpl $1, %eax
0xffffffff9a800182: 0f 82 d2 00 00 00 jb 0xffffffff9a80025a
0xffffffff9a800188: 66 31 ff xorw %di, %di
0xffffffff9a80018b: 81 fb 41 75 74 68 cmpl $0x68747541, %ebx
0xffffffff9a800191: 75 16 jne 0xffffffff9a8001a9
0xffffffff9a800193: 81 fa 65 6e 74 69 cmpl $0x69746e65, %edx
0xffffffff9a800199: 75 0e jne 0xffffffff9a8001a9
0xffffffff9a80019b: 81 f9 63 41 4d 44 cmpl $0x444d4163, %ecx
0xffffffff9a8001a1: 75 06 jne 0xffffffff9a8001a9
0xffffffff9a8001a3: 66 bf 01 00 movw $1, %di
0xffffffff9a8001a7: eb 4d jmp 0xffffffff9a8001f6
0xffffffff9a8001f6: b8 01 00 00 00 movl $1, %eax
0xffffffff9a8001fb: 0f a2 cpuid
0xffffffff9a8001fd: 81 e2 61 81 00 07 andl $0x7008161, %edx
0xffffffff9a800203: 81 f2 61 81 00 07 xorl $0x7008161, %edx
0xffffffff9a800209: 75 4f jne 0xffffffff9a80025a
0xffffffff9a80020b: b8 00 00 00 80 movl $0x80000000, %eax
0xffffffff9a800210: 0f a2 cpuid
0xffffffff9a800212: 3d 01 00 00 80 cmpl $0x80000001, %eax
0xffffffff9a800217: 72 41 jb 0xffffffff9a80025a
0xffffffff9a800219: b8 01 00 00 80 movl $0x80000001, %eax
0xffffffff9a80021e: 0f a2 cpuid
0xffffffff9a800220: 81 e2 00 00 00 20 andl $0x20000000, %edx
0xffffffff9a800226: 81 f2 00 00 00 20 xorl $0x20000000, %edx
0xffffffff9a80022c: 75 2c jne 0xffffffff9a80025a
0xffffffff9a80022e: b8 01 00 00 00 movl $1, %eax
0xffffffff9a800233: 0f a2 cpuid
0xffffffff9a800235: 81 e2 00 00 00 06 andl $0x6000000, %edx
0xffffffff9a80023b: 81 fa 00 00 00 06 cmpl $0x6000000, %edx
0xffffffff9a800241: 74 22 je 0xffffffff9a800265
0xffffffff9a800265: 9d popfq
0xffffffff9a800266: 31 c0 xorl %eax, %eax
0xffffffff9a800268: e9 23 24 d4 00 jmp 0xffffffff9b542690
0xffffffff9b542690: f3 0f 1e fa endbr64
0xffffffff9b542694: 65 48 c1 24 25 90 29 03 shlq $5, %gs:0x32990
0xffffffff9b54269c: 00 05
0xffffffff9b54269e: 74 02 je 0xffffffff9b5426a2
0xffffffff9b5426a2: e8 01 00 00 00 callq 0xffffffff9b5426a8
0xffffffff9b5426a8: e8 01 00 00 00 callq 0xffffffff9b5426ae
0xffffffff9b5426ae: e8 01 00 00 00 callq 0xffffffff9b5426b4
0xffffffff9b5426b4: e8 01 00 00 00 callq 0xffffffff9b5426ba
0xffffffff9b5426ba: e8 01 00 00 00 callq 0xffffffff9b5426c0
0xffffffff9b5426c0: e8 01 00 00 00 callq 0xffffffff9b5426c6
0xffffffff9b5426c6: e8 01 00 00 00 callq 0xffffffff9b5426cc
0xffffffff9b5426cc: e8 01 00 00 00 callq 0xffffffff9b5426d2
0xffffffff9b5426d2: e8 01 00 00 00 callq 0xffffffff9b5426d8
0xffffffff9b5426d8: e8 01 00 00 00 callq 0xffffffff9b5426de
0xffffffff9b5426de: e8 01 00 00 00 callq 0xffffffff9b5426e4
0xffffffff9b5426e4: e8 01 00 00 00 callq 0xffffffff9b5426ea
0xffffffff9b5426ea: e8 01 00 00 00 callq 0xffffffff9b5426f0
0xffffffff9b5426f0: e8 01 00 00 00 callq 0xffffffff9b5426f6
0xffffffff9b5426f6: e8 01 00 00 00 callq 0xffffffff9b5426fc
0xffffffff9b5426fc: e8 01 00 00 00 callq 0xffffffff9b542702
0xffffffff9b542702: 48 81 c4 80 00 00 00 addq $0x80, %rsp
0xffffffff9b542709: 65 48 c7 04 25 90 29 03 movq $-1, %gs:0x32990
0xffffffff9b542711: 00 ff ff ff ff
# Returns from `verify_cpu`
0xffffffff9b542716: c3 retq
0xffffffff9a800075: 48 8b 04 25 38 2e 64 9c movq 0xffffffff9c642e38, %rax
0xffffffff9a80007d: 48 05 00 00 61 1c addq $0x1c610000, %rax
0xffffffff9a800083: 0f 20 e1 movq %cr4, %rcx
0xffffffff9a800086: 83 e1 40 andl $0x40, %ecx
0xffffffff9a800089: 81 c9 a0 00 00 00 orl $0xa0, %ecx
0xffffffff9a80008f: f7 05 87 bf 6c 01 01 00 testl $1, 0x16cbf87(%rip)
0xffffffff9a800097: 00 00
0xffffffff9a800099: 74 06 je 0xffffffff9a8000a1
0xffffffff9a8000a1: 0f 22 e1 movq %rcx, %cr4
0xffffffff9a8000a4: 48 03 05 65 9f e1 01 addq 0x1e19f65(%rip), %rax
0xffffffff9a8000ab: 56 pushq %rsi
0xffffffff9a8000ac: 48 89 c7 movq %rax, %rdi
# Next line is `call sev_verify_cbit` from `secondary_startup_64`
0xffffffff9a8000af: e8 c2 01 00 00 callq 0xffffffff9a800276
# This next `sarq` does not have the correct GS set?
# RAX=0000000002e10000 RBX=0000000000000800 RCX=00000000000000a0 RDX=0000000006000000
# RSI=0000000000000000 RDI=0000000002e10000 RBP=0000000000000000 RSP=000000000009e018
# R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000
# R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000
# RIP=ffffffff9a8000af RFL=00200007 [-----PC] CPL=0 II=0 A20=1 SMM=0 HLT=0
# ES =0018 0000000000000000 ffffffff 00cf9300 DPL=0 DS [-WA]
# CS =0010 0000000000000000 ffffffff 00af9b00 DPL=0 CS64 [-RA]
# SS =0018 0000000000000000 ffffffff 00cf9300 DPL=0 DS [-WA]
# DS =0018 0000000000000000 ffffffff 00cf9300 DPL=0 DS [-WA]
# FS =0018 0000000000000000 ffffffff 00cf9300 DPL=0 DS [-WA]
# GS =0018 0000000000000000 ffffffff 00cf9300 DPL=0 DS [-WA]
# LDT=0000 0000000000000000 0000ffff 00008200 DPL=0 LDT
# TR =0000 0000000000000000 0000ffff 00008b00 DPL=0 TSS64-busy
# GDT= 0000000000098030 0000001f
# IDT= 0000000000000000 00000000
# CR0=80050033 CR2=0000000000000000 CR3=000000000009c000 CR4=000000a0
# DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
# DR6=00000000ffff0ff0 DR7=0000000000000400
# CCS=ffffffffe6800000 CCD=0000000002e10000 CCO=ADDQ
# EFER=0000000000000d01
0xffffffff9a800276: 65 48 c1 3c 25 90 29 03 sarq $5, %gs:0x32990
0xffffffff9a80027e: 00 05
0xffffffff9a800280: 66 0f 1f 00 nopw (%rax)
0xffffffff9a800284: 48 8b 35 ad 2b e4 01 movq 0x1e42bad(%rip), %rsi
0xffffffff9a80028b: 48 85 f6 testq %rsi, %rsi
0xffffffff9a80028e: 74 4b je 0xffffffff9a8002db
0xffffffff9a8002db: 48 89 f8 movq %rdi, %rax
0xffffffff9a8002de: e9 ad 23 d4 00 jmp 0xffffffff9b542690
0xffffffff9b542690: f3 0f 1e fa endbr64
0xffffffff9b542694: 65 48 c1 24 25 90 29 03 shlq $5, %gs:0x32990
0xffffffff9b54269c: 00 05
0xffffffff9b54269e: 74 02 je 0xffffffff9b5426a2
# Returns from `sev_verify_cbit`
0xffffffff9b5426a0: c3 retq
0xffffffff9a8000b4: 5e popq %rsi
0xffffffff9a8000b5: 0f 22 d8 movq %rax, %cr3
0xffffffff9a8000b8: 0f 20 e1 movq %cr4, %rcx
0xffffffff9a8000bb: 48 89 c8 movq %rcx, %rax
0xffffffff9a8000be: 48 81 f1 80 00 00 00 xorq $0x80, %rcx
0xffffffff9a8000c5: 0f 22 e1 movq %rcx, %cr4
0xffffffff9a8000c8: 0f 22 e0 movq %rax, %cr4
0xffffffff9a8000cb: 48 c7 c0 d4 00 80 9a movq $-0x657fff2c, %rax
0xffffffff9a8000d2: ff e0 jmpq *%rax
0xffffffff9a8000d4: 0f 01 15 25 9f e1 01 lgdtq 0x1e19f25(%rip)
0xffffffff9a8000db: 31 c0 xorl %eax, %eax
0xffffffff9a8000dd: 8e d8 movl %eax, %ds
0xffffffff9a8000df: 8e d0 movl %eax, %ss
0xffffffff9a8000e1: 8e c0 movl %eax, %es
0xffffffff9a8000e3: 8e e0 movl %eax, %fs
0xffffffff9a8000e5: 8e e8 movl %eax, %gs
0xffffffff9a8000e7: b9 01 01 00 c0 movl $0xc0000101, %ecx
0xffffffff9a8000ec: 8b 05 36 e5 fa 01 movl 0x1fae536(%rip), %eax
0xffffffff9a8000f2: 8b 15 34 e5 fa 01 movl 0x1fae534(%rip), %edx
# Restores GS in `secondary_startup_64`
0xffffffff9a8000f8: 0f 30 wrmsr
# Processor state after is:
# RAX=00000000c7a00000 RBX=0000000000000800 RCX=00000000c0000101 RDX=00000000ffff97b9
# RSI=0000000000000000 RDI=0000000002e10000 RBP=0000000000000000 RSP=000000000009e020
# R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000
# R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000
# RIP=ffffffff9a8000fa RFL=00200046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
# ES =0000 0000000000000000 00000000 00000000
# CS =0010 0000000000000000 ffffffff 00af9b00 DPL=0 CS64 [-RA]
# SS =0000 0000000000000000 00000000 00000000
# DS =0000 0000000000000000 00000000 00000000
# FS =0000 0000000000000000 00000000 00000000
# GS =0000 ffff97b9c7a00000 00000000 00000000
# LDT=0000 0000000000000000 0000ffff 00008200 DPL=0 LDT
# TR =0000 0000000000000000 0000ffff 00008b00 DPL=0 TSS64-busy
# GDT= ffff97b9c7a0b000 0000007f
# IDT= 0000000000000000 00000000
# CR0=80050033 CR2=0000000000000000 CR3=0000000002e10000 CR4=000000a0
# DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
# DR6=00000000ffff0ff0 DR7=0000000000000400
# CCS=0000000000000081 CCD=0000000000000020 CCO=CLR
# EFER=0000000000000d01
0xffffffff9a8000fa: 48 8b 25 37 e5 fa 01 movq 0x1fae537(%rip), %rsp
0xffffffff9a800101: 56 pushq %rsi
# Next line is `call early_setup_idt` from `secondary_startup_64`
0xffffffff9a800102: e8 9f 0f 00 00 callq 0xffffffff9a8010a6
0xffffffff9a8010a6: 65 48 c1 3c 25 90 29 03 sarq $5, %gs:0x32990
0xffffffff9a8010ae: 00 05
0xffffffff9a8010b0: 66 0f 1f 00 nopw (%rax)
0xffffffff9a8010b4: e8 2d af 08 00 callq 0xffffffff9a88bfe6
0xffffffff9a88bfe6: 65 48 c1 3c 25 90 29 03 sarq $5, %gs:0x32990
0xffffffff9a88bfee: 00 05
0xffffffff9a88bff0: 66 0f 1f 00 nopw (%rax)
0xffffffff9a88bff4: bf 03 00 00 00 movl $3, %edi
0xffffffff9a88bff9: e8 18 68 f7 ff callq 0xffffffff9a802816
0xffffffff9a802816: 65 48 c1 3c 25 90 29 03 sarq $5, %gs:0x32990
0xffffffff9a80281e: 00 05
0xffffffff9a802820: f3 0f 1e fa endbr64
0xffffffff9a802824: 8b 15 3e 98 6c 01 movl 0x16c983e(%rip), %edx
# ... more stuff inside `early_setup_idt` ellided
0xffffffff9a800107: 5e popq %rsi
0xffffffff9a800108: b8 01 00 00 80 movl $0x80000001, %eax
0xffffffff9a80010d: 0f a2 cpuid
0xffffffff9a80010f: 89 d7 movl %edx, %edi
0xffffffff9a800111: b9 80 00 00 c0 movl $0xc0000080, %ecx
0xffffffff9a800116: 0f 32 rdmsr
0xffffffff9a800118: 89 c2 movl %eax, %edx
0xffffffff9a80011a: 0f ba e8 00 btsl $0, %eax
0xffffffff9a80011e: 0f ba e7 14 btl $0x14, %edi
0xffffffff9a800122: 73 0d jae 0xffffffff9a800131
0xffffffff9a800124: 0f ba e8 0b btsl $0xb, %eax
0xffffffff9a800128: 48 0f ba 2d 8f 9f e1 01 btsq $0x3f, 0x1e19f8f(%rip)
0xffffffff9a800130: 3f
0xffffffff9a800131: 39 d0 cmpl %edx, %eax
0xffffffff9a800133: 74 04 je 0xffffffff9a800139
0xffffffff9a800139: b8 33 00 05 80 movl $0x80050033, %eax
0xffffffff9a80013e: 0f 22 c0 movq %rax, %cr0
0xffffffff9a800141: 6a 00 pushq $0
0xffffffff9a800143: 9d popfq
0xffffffff9a800144: 48 89 f7 movq %rsi, %rdi
0xffffffff9a800147: 68 5a 01 80 9a pushq $-0x657ffea6
0xffffffff9a80014c: 31 ed xorl %ebp, %ebp
0xffffffff9a80014e: 48 8b 05 cb e4 fa 01 movq 0x1fae4cb(%rip), %rax
0xffffffff9a800155: 6a 10 pushq $0x10
0xffffffff9a800157: 50 pushq %rax
0xffffffff9a800158: 48 cb lretq
0xffffffff9a86db70: f3 0f 1e fa endbr64
# START wakeup_long64
0xffffffff9a86db74: 48 8b 04 25 90 0a 63 9c movq 0xffffffff9c630a90, %rax
0xffffffff9a86db7c: 48 ba f0 de bc 9a 78 56 movabsq $0x123456789abcdef0, %rdx
0xffffffff9a86db84: 34 12
0xffffffff9a86db86: 48 39 d0 cmpq %rdx, %rax
0xffffffff9a86db89: 74 0c je 0xffffffff9a86db97
0xffffffff9a86db97: 66 b8 18 00 movw $0x18, %ax
0xffffffff9a86db9b: 8e d0 movl %eax, %ss
0xffffffff9a86db9d: 8e d8 movl %eax, %ds
0xffffffff9a86db9f: 8e c0 movl %eax, %es
0xffffffff9a86dba1: 8e e0 movl %eax, %fs
# This clears GS again
0xffffffff9a86dba3: 8e e8 movl %eax, %gs
# Processor state after is:
# RAX=123456789abc0018 RBX=0000000000000000 RCX=00000000c0000080 RDX=123456789abcdef0
# RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffffffff9cff3fd8
# R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000
# R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000
# RIP=ffffffff9a86dba5 RFL=00000046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
# ES =0018 0000000000000000 ffffffff 00cf9300 DPL=0 DS [-WA]
# CS =0010 0000000000000000 ffffffff 00af9b00 DPL=0 CS64 [-RA]
# SS =0018 0000000000000000 ffffffff 00cf9300 DPL=0 DS [-WA]
# DS =0018 0000000000000000 ffffffff 00cf9300 DPL=0 DS [-WA]
# FS =0018 0000000000000000 ffffffff 00cf9300 DPL=0 DS [-WA]
# GS =0018 0000000000000000 ffffffff 00cf9300 DPL=0 DS [-WA]
# LDT=0000 0000000000000000 0000ffff 00008200 DPL=0 LDT
# TR =0000 0000000000000000 0000ffff 00008b00 DPL=0 TSS64-busy
# GDT= ffff97b9c7a0b000 0000007f
# IDT= ffffffff9c604000 000001ff
# CR0=80050033 CR2=0000000000000000 CR3=0000000002e10000 CR4=000000a0
# DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
# DR6=00000000ffff0ff0 DR7=0000000000000400
# CCS=0000000000000044 CCD=0000000000000000 CCO=EFLAGS
# EFER=0000000000000d01
0xffffffff9a86dba5: 48 8b 24 25 88 0a 63 9c movq 0xffffffff9c630a88, %rsp
0xffffffff9a86dbad: 48 8b 1c 25 78 0a 63 9c movq 0xffffffff9c630a78, %rbx
0xffffffff9a86dbb5: 48 8b 3c 25 70 0a 63 9c movq 0xffffffff9c630a70, %rdi
0xffffffff9a86dbbd: 48 8b 34 25 68 0a 63 9c movq 0xffffffff9c630a68, %rsi
0xffffffff9a86dbc5: 48 8b 2c 25 60 0a 63 9c movq 0xffffffff9c630a60, %rbp
0xffffffff9a86dbcd: 48 8b 04 25 80 0a 63 9c movq 0xffffffff9c630a80, %rax
0xffffffff9a86dbd5: ff e0 jmpq *%rax
# START `.Lresume_point` in `do_suspend_lowlevel`
0xffffffff9a86dc90: 48 c7 c0 e0 53 0e 9d movq $-0x62f1ac20, %rax
0xffffffff9a86dc97: 48 8b 98 e0 00 00 00 movq 0xe0(%rax), %rbx
0xffffffff9a86dc9e: 0f 22 e3 movq %rbx, %cr4
0xffffffff9a86dca1: 48 8b 98 d8 00 00 00 movq 0xd8(%rax), %rbx
0xffffffff9a86dca8: 0f 22 db movq %rbx, %cr3
0xffffffff9a86dcab: 48 8b 98 d0 00 00 00 movq 0xd0(%rax), %rbx
0xffffffff9a86dcb2: 0f 22 d3 movq %rbx, %cr2
0xffffffff9a86dcb5: 48 8b 98 c8 00 00 00 movq 0xc8(%rax), %rbx
0xffffffff9a86dcbc: 0f 22 c3 movq %rbx, %cr0
0xffffffff9a86dcbf: ff b0 90 00 00 00 pushq 0x90(%rax)
0xffffffff9a86dcc5: 9d popfq
0xffffffff9a86dcc6: 48 8b a0 98 00 00 00 movq 0x98(%rax), %rsp
0xffffffff9a86dccd: 48 8b 68 20 movq 0x20(%rax), %rbp
0xffffffff9a86dcd1: 48 8b 70 68 movq 0x68(%rax), %rsi
0xffffffff9a86dcd5: 48 8b 78 70 movq 0x70(%rax), %rdi
0xffffffff9a86dcd9: 48 8b 58 28 movq 0x28(%rax), %rbx
0xffffffff9a86dcdd: 48 8b 48 58 movq 0x58(%rax), %rcx
0xffffffff9a86dce1: 48 8b 50 60 movq 0x60(%rax), %rdx
0xffffffff9a86dce5: 4c 8b 40 48 movq 0x48(%rax), %r8
0xffffffff9a86dce9: 4c 8b 48 40 movq 0x40(%rax), %r9
0xffffffff9a86dced: 4c 8b 50 38 movq 0x38(%rax), %r10
0xffffffff9a86dcf1: 4c 8b 58 30 movq 0x30(%rax), %r11
0xffffffff9a86dcf5: 4c 8b 60 18 movq 0x18(%rax), %r12
0xffffffff9a86dcf9: 4c 8b 68 10 movq 0x10(%rax), %r13
0xffffffff9a86dcfd: 4c 8b 70 08 movq 8(%rax), %r14
0xffffffff9a86dd01: 4c 8b 38 movq (%rax), %r15
0xffffffff9a86dd04: 31 c0 xorl %eax, %eax
0xffffffff9a86dd06: 48 83 c4 08 addq $8, %rsp
# Jumps to `restore_processor_state`
0xffffffff9a86dd0a: e9 31 ed cb 00 jmp 0xffffffff9b52ca40
0xffffffff9b52ca40: 55 pushq %rbp
0xffffffff9b52ca41: 48 89 e5 movq %rsp, %rbp
0xffffffff9b52ca44: 41 57 pushq %r15
0xffffffff9b52ca46: 41 56 pushq %r14
0xffffffff9b52ca48: 41 55 pushq %r13
0xffffffff9b52ca4a: 41 54 pushq %r12
0xffffffff9b52ca4c: 53 pushq %rbx
0xffffffff9b52ca4d: 48 83 ec 20 subq $0x20, %rsp
0xffffffff9b52ca51: 80 3d c4 8a bb 01 00 cmpb $0, 0x1bb8ac4(%rip)
0xffffffff9b52ca58: 74 15 je 0xffffffff9b52ca6f
0xffffffff9b52ca5a: 48 8b 05 67 8a bb 01 movq 0x1bb8a67(%rip), %rax
0xffffffff9b52ca61: b9 a0 01 00 00 movl $0x1a0, %ecx
0xffffffff9b52ca66: 48 89 c2 movq %rax, %rdx
0xffffffff9b52ca69: 48 c1 ea 20 shrq $0x20, %rdx
0xffffffff9b52ca6d: 0f 30 wrmsr
0xffffffff9b52ca6f: 48 8b 05 6a 8a bb 01 movq 0x1bb8a6a(%rip), %rax
0xffffffff9b52ca76: b9 80 00 00 c0 movl $0xc0000080, %ecx
0xffffffff9b52ca7b: 48 89 c2 movq %rax, %rdx
0xffffffff9b52ca7e: 48 c1 ea 20 shrq $0x20, %rdx
0xffffffff9b52ca82: 0f 30 wrmsr
0xffffffff9b52ca84: 48 8b 05 35 8a bb 01 movq 0x1bb8a35(%rip), %rax
0xffffffff9b52ca8b: 0f 22 e0 movq %rax, %cr4
0xffffffff9b52ca8e: 48 89 05 2b 8a bb 01 movq %rax, 0x1bb8a2b(%rip)
0xffffffff9b52ca95: 48 8b 05 1c 8a bb 01 movq 0x1bb8a1c(%rip), %rax
0xffffffff9b52ca9c: 0f 22 d8 movq %rax, %cr3
0xffffffff9b52ca9f: 48 8b 05 0a 8a bb 01 movq 0x1bb8a0a(%rip), %rax
0xffffffff9b52caa6: 0f 22 d0 movq %rax, %cr2
0xffffffff9b52caa9: 48 8b 05 f8 89 bb 01 movq 0x1bb89f8(%rip), %rax
0xffffffff9b52cab0: 0f 22 c0 movq %rax, %cr0
0xffffffff9b52cab3: 48 89 05 ee 89 bb 01 movq %rax, 0x1bb89ee(%rip)
0xffffffff9b52caba: 0f 01 1d 35 8a bb 01 lidtq 0x1bb8a35(%rip)
0xffffffff9b52cac1: b8 18 00 00 00 movl $0x18, %eax
0xffffffff9b52cac6: 8e d0 movl %eax, %ss
0xffffffff9b52cac8: b8 2b 00 00 00 movl $0x2b, %eax
0xffffffff9b52cacd: 89 c2 movl %eax, %edx
0xffffffff9b52cacf: 8e da movl %edx, %ds
0xffffffff9b52cad1: 8e c0 movl %eax, %es
0xffffffff9b52cad3: 48 8b 05 b6 89 bb 01 movq 0x1bb89b6(%rip), %rax
0xffffffff9b52cada: b9 01 01 00 c0 movl $0xc0000101, %ecx
0xffffffff9b52cadf: 48 89 c2 movq %rax, %rdx
0xffffffff9b52cae2: 48 c1 ea 20 shrq $0x20, %rdx
# Restores GS inside `__restore_processor_state`. Processor state after is:
# RAX=ffff97b9c7a00000 RBX=ffff97b9c5b6be00 RCX=00000000c0000101 RDX=00000000ffff97b9
# RSI=ffffffffd43c95f9 RDI=0000000000000004 RBP=ffffad4e8062fca0 RSP=ffffad4e8062fc58
# R8 =0000000000000004 R9 =0000000021bee048 R10=00000000aaaaaaab R11=0000000000000005
# R12=0000000000000000 R13=0000000000000000 R14=0000000000000004 R15=ffff97b9c5929020
# RIP=ffffffff9b52cae8 RFL=00000003 [------C] CPL=0 II=0 A20=1 SMM=0 HLT=0
# ES =002b 0000000000000000 ffffffff 00cff300 DPL=3 DS [-WA]
# CS =0010 0000000000000000 ffffffff 00af9b00 DPL=0 CS64 [-RA]
# SS =0018 0000000000000000 ffffffff 00cf9300 DPL=0 DS [-WA]
# DS =002b 0000000000000000 ffffffff 00cff300 DPL=3 DS [-WA]
# FS =0018 0000000000000000 ffffffff 00cf9300 DPL=0 DS [-WA]
# GS =0018 ffff97b9c7a00000 ffffffff 00cf9300 DPL=0 DS [-WA]
# LDT=0000 0000000000000000 0000ffff 00008200 DPL=0 LDT
# TR =0000 0000000000000000 0000ffff 00008b00 DPL=0 TSS64-busy
# GDT= ffff97b9c7a0b000 0000007f
# IDT= fffffe0000000000 00000fff
# CR0=80050033 CR2=000000000049304a CR3=0000000005b58000 CR4=000006f0
# DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
# DR6=00000000ffff0ff0 DR7=0000000000000400
# CCS=00000001ffff2f73 CCD=00000000ffff97b9 CCO=SARQ
# EFER=0000000000000d01
0xffffffff9b52cae6: 0f 30 wrmsr
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