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9d3e7b7c82
linux/arch/arm64/kvm
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Will Deacon 9d3e7b7c82 KVM: arm64: Really propagate PSCI SYSTEM_RESET2 arguments to userspace 
Commit d43583b890 ("KVM: arm64: Expose PSCI SYSTEM_RESET2 call to the
guest") hooked up the SYSTEM_RESET2 PSCI call for guests but failed to
preserve its arguments for userspace, instead overwriting them with
zeroes via smccc_set_retval(). As Linux only passes zeroes for these
arguments, this appeared to be working for Linux guests. Oh well.

Don't call smccc_set_retval() for a SYSTEM_RESET2 heading to userspace
and instead set X0 (and only X0) explicitly to PSCI_RET_INTERNAL_FAILURE
just in case the vCPU re-enters the guest.

Fixes: d43583b890 ("KVM: arm64: Expose PSCI SYSTEM_RESET2 call to the guest")
Reported-by: Andrew Walbran <qwandor@google.com>
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220309181308.982-1-will@kernel.org
2022-03-09 18:17:30 +00:00
..
hyp KVM: arm64: Workaround Cortex-A510's single-step and PAC trap errata 2022-02-03 09:22:30 +00:00
vgic KVM/arm64 fixes for 5.17, take #1 2022-01-28 07:45:15 -05:00
.gitignore KVM: arm64: Generate hyp_constants.h for the host 2021-12-06 08:37:03 +00:00
arch_timer.c KVM: Add helpers to wake/query blocking vCPU 2021-12-08 04:24:54 -05:00
arm.c KVM/arm64 fixes for 5.17, take #2 2022-02-05 00:58:25 -05:00
debug.c KVM: arm64: MDCR_EL2 is a 64-bit register 2021-08-20 11:12:17 +01:00
fpsimd.c KVM: arm64: pkvm: Unshare guest structs during teardown 2021-12-16 12:58:57 +00:00
guest.c KVM: arm64: Change the return type of kvm_vcpu_preferred_target() 2021-11-08 10:48:47 +00:00
handle_exit.c KVM: arm64: Stop handle_exit() from handling HVC twice when an SError occurs 2022-02-03 09:20:05 +00:00
hypercalls.c KVM: arm64: Add support for the KVM PTP service 2021-04-07 16:33:20 +01:00
inject_fault.c KVM: arm64: Move AArch32 exceptions over to AArch64 sysregs 2020-11-10 11:22:51 +00:00
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 RISCV: 2022-01-16 16:15:14 +02:00
mmio.c KVM: arm64: Make kvm_skip_instr() and co private to HYP 2020-11-10 08:34:24 +00:00
mmu.c KVM/arm64 updates for Linux 5.16 2022-01-07 10:42:19 -05:00
pkvm.c KVM: arm64: Move host EL1 code out of hyp/ directory 2021-12-06 08:37:03 +00:00
pmu-emul.c RISCV: 2022-01-16 16:15:14 +02:00
pmu.c KVM: arm64: Disable PMU support in protected mode 2021-03-19 12:02:19 +00:00
psci.c KVM: arm64: Really propagate PSCI SYSTEM_RESET2 arguments to userspace 2022-03-09 18:17:30 +00:00
pvtime.c KVM: arm64: Use kvm_write_guest_lock when init stolen time 2020-12-03 19:02:18 +00:00
reset.c RISCV: 2022-01-16 16:15:14 +02:00
sys_regs.c arm64: add ID_AA64ISAR2_EL1 sys register 2021-12-13 18:53:00 +00:00
sys_regs.h KVM: arm64: Refactor sys_regs.h,c for nVHE reuse 2021-08-20 11:12:17 +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