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e5ac4200b4
qemu/target/arm
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Andrew Jones e5ac4200b4 target/arm/kvm: Implement virtual time adjustment 
When a VM is stopped (such as when it's paused) guest virtual time
should stop counting. Otherwise, when the VM is resumed it will
experience time jumps and its kernel may report soft lockups. Not
counting virtual time while the VM is stopped has the side effect
of making the guest's time appear to lag when compared with real
time, and even with time derived from the physical counter. For
this reason, this change, which is enabled by default, comes with
a KVM CPU feature allowing it to be disabled, restoring legacy
behavior.

This patch only provides the implementation of the virtual time
adjustment. A subsequent patch will provide the CPU property
allowing the change to be enabled and disabled.

Reported-by: Bijan Mottahedeh <bijan.mottahedeh@oracle.com>
Signed-off-by: Andrew Jones <drjones@redhat.com>
Message-id: 20200120101023.16030-6-drjones@redhat.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2020-01-30 16:02:06 +00:00
..
a32-uncond.decode target/arm: Convert Unallocated memory hint 2019-09-05 13:23:03 +01:00
a32.decode target/arm: Convert SVC 2019-09-05 13:23:03 +01:00
arch_dump.c target/arm/arch_dump: Add SVE notes 2020-01-23 15:34:04 +00:00
arm_ldst.h target/arm: fetch code with translator_ld 2019-10-28 15:12:38 +00:00
arm-powerctl.c arm/arm-powerctl: rebuild hflags after setting CP15 bits in arm_set_cpu_on() 2019-12-20 14:03:00 +00:00
arm-powerctl.h target/arm/arm-powerctl: Add new arm_set_cpu_on_and_reset() 2019-02-28 11:03:04 +00:00
arm-semi.c target/arm/arm-semi: Don't let the guest close stdin/stdout/stderr 2020-01-30 16:02:01 +00:00
cpu64.c target/arm: Add support for DC CVAP & DC CVADP ins 2019-12-16 10:46:35 +00:00
cpu-param.h tcg: Split out target/arch/cpu-param.h 2019-06-10 07:03:34 -07:00
cpu-qom.h hw/core: Move cpu.c, cpu.h from qom/ to hw/core/ 2019-08-21 13:24:01 +02:00
cpu.c * Register qdev properties as class properties (Marc-André) 2020-01-27 09:44:04 +00:00
cpu.h target/arm/kvm: Implement virtual time adjustment 2020-01-30 16:02:06 +00:00
crypto_helper.c target: Do not include "exec/exec-all.h" if it is not necessary 2018-06-01 14:15:10 +02:00
debug_helper.c target/arm: Move debug routines to debug_helper.c 2019-07-04 17:14:43 +01:00
gdbstub64.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
gdbstub.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
helper-a64.c tcg: Search includes from the project root source directory 2020-01-15 15:13:10 -10:00
helper-a64.h target/arm: Split helper_msr_i_pstate into 3 2019-03-05 15:55:08 +00:00
helper-sve.h target/arm: Rewrite vector gather first-fault loads 2018-10-08 14:55:03 +01:00
helper.c target/arm: only update pc after semihosting completes 2020-01-09 11:41:29 +00:00
helper.h target/arm: ensure we use current exception state after SCR update 2019-12-16 10:52:58 +00:00
idau.h qom: make interface types abstract 2018-12-11 15:45:22 -02:00
internals.h target/arm: Split out arm_mmu_idx_el 2019-10-24 17:16:28 +01:00
iwmmxt_helper.c target/arm: Untabify iwmmxt_helper.c 2018-08-24 13:17:48 +01:00
kvm32.c target/arm/kvm: Implement virtual time adjustment 2020-01-30 16:02:06 +00:00
kvm64.c target/arm/kvm: Implement virtual time adjustment 2020-01-30 16:02:06 +00:00
kvm_arm.h target/arm/kvm: Implement virtual time adjustment 2020-01-30 16:02:06 +00:00
kvm-consts.h arm: add trailing ; after MISMATCH_CHECK 2017-02-01 03:37:18 +02:00
kvm-stub.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
kvm.c target/arm/kvm: Implement virtual time adjustment 2020-01-30 16:02:06 +00:00
m_helper.c target/arm: only update pc after semihosting completes 2020-01-09 11:41:29 +00:00
machine.c target/arm/kvm: Implement virtual time adjustment 2020-01-30 16:02:06 +00:00
Makefile.objs target/arm: Add skeleton for T16 decodetree 2019-09-05 13:23:03 +01:00
monitor.c target/arm/cpu64: max cpu: Introduce sve<N> properties 2019-11-01 20:40:59 +00:00
neon_helper.c target/arm: Use tcg_gen_abs_i64 and tcg_gen_gvec_abs 2019-05-13 22:52:08 +00:00
op_addsub.h
op_helper.c target/arm: adjust program counter for wfi exception in AArch32 2020-01-17 14:27:16 +00:00
pauth_helper.c target/arm: Fix PAuth sbox functions 2020-01-23 15:22:38 +00:00
psci.c sysemu: Split sysemu/runstate.h off sysemu/sysemu.h 2019-08-16 13:37:36 +02:00
sve_helper.c tcg: Search includes from the project root source directory 2020-01-15 15:13:10 -10:00
sve.decode target/arm: SVE brk[ab] merging does not have s bit 2019-01-07 15:23:45 +00:00
t16.decode target/arm: Convert T16, long branches 2019-09-05 13:23:04 +01:00
t32.decode target/arm: Convert TT 2019-09-05 13:23:03 +01:00
tlb_helper.c target/arm: Return correct IL bit in merge_syn_data_abort 2020-01-17 14:27:16 +00:00
trace-events trace-events: Shorten file names in comments 2019-03-22 16:18:07 +00:00
translate-a64.c tcg: Search includes from the project root source directory 2020-01-15 15:13:10 -10:00
translate-a64.h Allow page table bit to swap endianness. 2019-09-04 16:29:18 +01:00
translate-sve.c tcg: Search includes from the project root source directory 2020-01-15 15:13:10 -10:00
translate-vfp.inc.c target/arm: Handle trapping to EL2 of AArch32 VMRS instructions 2019-12-16 10:46:34 +00:00
translate.c target/arm: Set ISSIs16Bit in make_issinfo 2020-01-17 14:27:16 +00:00
translate.h target/arm: Handle AArch32 CP15 trapping via HSTR_EL2 2019-12-16 10:46:35 +00:00
vec_helper.c target/arm: Add helpers for FMLAL 2019-02-28 11:03:05 +00:00
vfp_helper.c target/arm: Handle trapping to EL2 of AArch32 VMRS instructions 2019-12-16 10:46:34 +00:00
vfp-uncond.decode target/arm: Convert VCVTA/VCVTN/VCVTP/VCVTM to decodetree 2019-06-13 15:14:04 +01:00
vfp.decode target/arm: Use vfp_expand_imm() for AArch32 VFP VMOV_imm 2019-06-17 15:14:19 +01:00