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| author | Christoffer Dall <christoffer.dall@linaro.org> | 2017-10-03 15:02:12 +0300 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2018-03-19 13:53:13 +0300 |
| commit | 3f5c90b890acfa7ad0b817a67cfc5eaaf0e21f7d (patch) | |
| tree | 34680c327ab34cdfd8b097638e59a02f6f648319 /arch/arm64/include/asm/kvm_host.h | |
| parent | dc251406bf244080adbc1a69b5a171ec4b43c93c (diff) | |
| download | linux-3f5c90b890acfa7ad0b817a67cfc5eaaf0e21f7d.tar.xz | |
KVM: arm64: Introduce VHE-specific kvm_vcpu_run
So far this is mostly (see below) a copy of the legacy non-VHE switch
function, but we will start reworking these functions in separate
directions to work on VHE and non-VHE in the most optimal way in later
patches.
The only difference after this patch between the VHE and non-VHE run
functions is that we omit the branch-predictor variant-2 hardening for
QC Falkor CPUs, because this workaround is specific to a series of
non-VHE ARMv8.0 CPUs.
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/kvm_host.h')
| -rw-r--r-- | arch/arm64/include/asm/kvm_host.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index c30fc96992df..87abc94fb591 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -428,6 +428,13 @@ static inline void kvm_arm_vhe_guest_enter(void) static inline void kvm_arm_vhe_guest_exit(void) { local_daif_restore(DAIF_PROCCTX_NOIRQ); + + /* + * When we exit from the guest we change a number of CPU configuration + * parameters, such as traps. Make sure these changes take effect + * before running the host or additional guests. + */ + isb(); } static inline bool kvm_arm_harden_branch_predictor(void) |