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linux/arch/arm64/kvm
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Kalesh Singh 314a61dc31 KVM: arm64: Introduce hyp_dump_backtrace() 
In non-protected nVHE mode, unwinds and dumps the hypervisor backtrace
from EL1. This is possible beacause the host can directly access the
hypervisor stack pages in non-protected mode.

The nVHE backtrace is dumped on hyp_panic(), before panicking the host.

[  101.498183] kvm [377]: nVHE call trace:
[  101.498363] kvm [377]:  [<ffff8000090a6570>] __kvm_nvhe_hyp_panic+0xac/0xf8
[  101.499045] kvm [377]:  [<ffff8000090a65cc>] __kvm_nvhe_hyp_panic_bad_stack+0x10/0x10
[  101.499498] kvm [377]:  [<ffff8000090a61e4>] __kvm_nvhe_recursive_death+0x24/0x34
. . .
[  101.524929] kvm [377]:  [<ffff8000090a61e4>] __kvm_nvhe_recursive_death+0x24/0x34
[  101.525062] kvm [377]:  [<ffff8000090a61e4>] __kvm_nvhe_recursive_death+0x24/0x34
[  101.525195] kvm [377]:  [<ffff8000090a5de4>] __kvm_nvhe___kvm_vcpu_run+0x30/0x40c
[  101.525333] kvm [377]:  [<ffff8000090a8b64>] __kvm_nvhe_handle___kvm_vcpu_run+0x30/0x48
[  101.525468] kvm [377]:  [<ffff8000090a88b8>] __kvm_nvhe_handle_trap+0xc4/0x128
[  101.525602] kvm [377]:  [<ffff8000090a7864>] __kvm_nvhe___host_exit+0x64/0x64
[  101.525745] kvm [377]: ---[ end nVHE call trace ]---

Signed-off-by: Kalesh Singh <kaleshsingh@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220726073750.3219117-12-kaleshsingh@google.com
2022-07-26 10:49:50 +01:00
..
hyp
KVM: arm64: Prepare non-protected nVHE hypervisor stacktrace
2022-07-26 10:49:27 +01:00
vgic
KVM: arm64: Replace vgic_v3_uaccess_read_pending with vgic_uaccess_read_pending
2022-06-08 10:16:15 +01:00
.gitignore
KVM: arm64: Generate hyp_constants.h for the host
2021-12-06 08:37:03 +00:00
arch_timer.c
KVM: arm64: Warn if accessing timer pending state outside of vcpu context
2022-06-08 10:16:23 +01:00
arm.c
KVM: arm64: Implement non-protected nVHE hyp stack unwinder
2022-07-26 10:49:39 +01:00
debug.c
KVM: arm64: Emulate the OS Lock
2022-02-08 14:23:41 +00:00
fpsimd.c
KVM: arm64: Always start with clearing SME flag on load
2022-06-07 14:31:30 +01:00
guest.c
KVM: arm64: Setup a framework for hypercall bitmap firmware registers
2022-05-03 21:30:19 +01:00
handle_exit.c
KVM: arm64: Introduce hyp_dump_backtrace()
2022-07-26 10:49:50 +01:00
hypercalls.c
KVM: arm64: Fix hypercall bitmap writeback when vcpus have already run
2022-05-16 17:40:48 +01:00
inject_fault.c
arm64 updates for 5.19:
2022-05-23 21:06:11 -07:00
irq.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 422
2019-06-05 17:37:15 +02:00
Kconfig
RISCV:
2022-01-16 16:15:14 +02:00
Makefile
KVM: arm64: pmu: Restore compilation when HW_PERF_EVENTS isn't selected
2022-05-16 13:42:41 +01:00
mmio.c
KVM: arm64: Generalise VM features into a set of flags
2022-03-18 14:02:33 +00:00
mmu.c
Merge branch kvm-arm64/hyp-stack-guard into kvmarm-master/next
2022-05-04 09:42:37 +01:00
pkvm.c
KVM: arm64: Move host EL1 code out of hyp/ directory
2021-12-06 08:37:03 +00:00
pmu-emul.c
Merge branch kvm-arm64/per-vcpu-host-pmu-data into kvmarm-master/next
2022-05-16 17:48:36 +01:00
pmu.c
KVM: arm64: Pass pmu events to hyp via vcpu
2022-05-15 11:26:41 +01:00
psci.c
Merge branch kvm-arm64/psci-suspend into kvmarm-master/next
2022-05-16 17:48:20 +01:00
pvtime.c
KVM: arm64: Use kvm_write_guest_lock when init stolen time
2020-12-03 19:02:18 +00:00
reset.c
KVM: arm64: mixed-width check should be skipped for uninitialized vCPUs
2022-04-06 12:29:45 +01:00
sys_regs.c
S390:
2022-05-26 14:20:14 -07:00
sys_regs.h
KVM: arm64: Hide AArch32 PMU registers when not available
2022-05-03 11:17:41 +01:00
trace_arm.h
KVM: Move arm64's MMU notifier trace events to generic code
2021-04-17 08:30:56 -04:00
trace_handle_exit.h
KVM: arm64: Upgrade trace_kvm_arm_set_dreg32() to 64bit
2021-08-20 11:12:18 +01:00
trace.h
KVM: arm64: Move virt/kvm/arm to arch/arm64
2020-05-16 15:03:59 +01:00
trng.c
KVM: arm64: Implement the TRNG hypervisor call
2021-01-25 22:19:31 +00:00
va_layout.c
KVM: arm64: Generate final CTR_EL0 value when running in Protected mode
2021-03-25 11:00:33 +00:00
vgic-sys-reg-v3.c
KVM: arm64: Drop is_aarch32 trap attribute
2020-11-10 11:22:52 +00:00
vmid.c
KVM: arm64: Fix inconsistent indenting
2022-06-07 15:27:05 +01:00