Sean Christopherson 50a9ac2598 KVM: x86/mmu: Don't install TDP MMU SPTE if SP has unexpected level ... Don't install a leaf TDP MMU SPTE if the parent page's level doesn't match the target level of the fault, and instead have the vCPU retry the faulting instruction after warning. Continuing on is completely unnecessary as the absolute worst case scenario of retrying is DoSing the vCPU, whereas continuing on all but guarantees bigger explosions, e.g. ------------[ cut here ]------------ kernel BUG at arch/x86/kvm/mmu/tdp_mmu.c:559! invalid opcode: 0000 [#1] SMP CPU: 1 PID: 1025 Comm: nx_huge_pages_t Tainted: G W 6.1.0-rc4+ #64 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015 RIP: 0010:__handle_changed_spte.cold+0x95/0x9c RSP: 0018:ffffc9000072faf8 EFLAGS: 00010246 RAX: 00000000000000c1 RBX: ffffc90000731000 RCX: 0000000000000027 RDX: 0000000000000000 RSI: 00000000ffffdfff RDI: ffff888277c5b4c8 RBP: 0600000112400bf3 R08: ffff888277c5b4c0 R09: ffffc9000072f9a0 R10: 0000000000000001 R11: 0000000000000001 R12: 06000001126009f3 R13: 0000000000000002 R14: 0000000012600901 R15: 0000000012400b01 FS: 00007fba9f853740(0000) GS:ffff888277c40000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000010aa7a003 CR4: 0000000000172ea0 Call Trace: <TASK> kvm_tdp_mmu_map+0x3b0/0x510 kvm_tdp_page_fault+0x10c/0x130 kvm_mmu_page_fault+0x103/0x680 vmx_handle_exit+0x132/0x5a0 [kvm_intel] vcpu_enter_guest+0x60c/0x16f0 kvm_arch_vcpu_ioctl_run+0x1e2/0x9d0 kvm_vcpu_ioctl+0x271/0x660 __x64_sys_ioctl+0x80/0xb0 do_syscall_64+0x2b/0x50 entry_SYSCALL_64_after_hwframe+0x46/0xb0 </TASK> Modules linked in: kvm_intel ---[ end trace 0000000000000000 ]--- Signed-off-by: Sean Christopherson <seanjc@google.com> Message-Id: <20221213033030.83345-5-seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>		2022-12-23 12:33:53 -05:00
..
alpha	asm-generic: arch/alpha regression fix for 6.1	2022-10-14 13:47:42 -07:00
arc	ARC: mm: fix leakage of memory allocated for PTE	2022-10-17 16:32:12 -07:00
arm	ARM: dts: ux500: Add trips to battery thermal zones	2022-11-01 12:21:17 +01:00
arm64	KVM/arm64 updates for 6.2	2022-12-09 09:12:12 +01:00
csky	- hfs and hfsplus kmap API modernization from Fabio Francesco	2022-10-12 11:00:22 -07:00
hexagon	- hfs and hfsplus kmap API modernization from Fabio Francesco	2022-10-12 11:00:22 -07:00
ia64	- hfs and hfsplus kmap API modernization from Fabio Francesco	2022-10-12 11:00:22 -07:00
loongarch	LoongArch: BPF: Avoid declare variables in switch-case	2022-10-29 16:29:31 +08:00
m68k	- hfs and hfsplus kmap API modernization from Fabio Francesco	2022-10-12 11:00:22 -07:00
microblaze	- hfs and hfsplus kmap API modernization from Fabio Francesco	2022-10-12 11:00:22 -07:00
mips	Random number generator fixes for Linux 6.1-rc1.	2022-10-16 15:27:07 -07:00
nios2	- hfs and hfsplus kmap API modernization from Fabio Francesco	2022-10-12 11:00:22 -07:00
openrisc	OpenRISC 6.1 Updates	2022-10-15 16:47:33 -07:00
parisc	parisc: Avoid printing the hardware path twice	2022-10-31 15:37:14 +01:00
powerpc	KVM: replace direct irq.h inclusion	2022-11-09 12:31:37 -05:00
riscv	RISC-V Fixes for 6.1-rc3	2022-10-28 17:03:00 -07:00
s390	- Second batch of the lazy destroy patches	2022-11-28 13:34:47 -05:00
sh	- hfs and hfsplus kmap API modernization from Fabio Francesco	2022-10-12 11:00:22 -07:00
sparc	Random number generator fixes for Linux 6.1-rc1.	2022-10-16 15:27:07 -07:00
um	Random number generator fixes for Linux 6.1-rc1.	2022-10-16 15:27:07 -07:00
x86	KVM: x86/mmu: Don't install TDP MMU SPTE if SP has unexpected level	2022-12-23 12:33:53 -05:00
xtensa	- hfs and hfsplus kmap API modernization from Fabio Francesco	2022-10-12 11:00:22 -07:00
.gitignore
Kconfig	- Yu Zhao's Multi-Gen LRU patches are here. They've been under test in	2022-10-10 17:53:04 -07:00