James Morse 11b41626bd KVM: arm64: Skip more of the SError vaxorcism ... During __guest_exit() we need to consume any SError left pending by the guest so it doesn't contaminate the host. With v8.2 we use the ESB-instruction. For systems without v8.2, we use dsb+isb and unmask SError. We do this on every guest exit. Use the same dsb+isr_el1 trick, this lets us know if an SError is pending after the dsb, allowing us to skip the isb and self-synchronising PSTATE write if its not. This means SError remains masked during KVM's world-switch, so any SError that occurs during this time is reported by the host, instead of causing a hyp-panic. As we're benchmarking this code lets polish the layout. If you give gcc likely()/unlikely() hints in an if() condition, it shuffles the generated assembly so that the likely case is immediately after the branch. Lets do the same here. Signed-off-by: James Morse <james.morse@arm.com> Changes since v2: * Added isb after the dsb to prevent an early read Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>		2019-07-05 13:03:34 +01:00
..
debug-sr.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234	2019-06-19 17:09:07 +02:00
entry.S	KVM: arm64: Skip more of the SError vaxorcism	2019-07-05 13:03:34 +01:00
fpsimd.S	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234	2019-06-19 17:09:07 +02:00
hyp-entry.S	KVM: arm64: Consume pending SError as early as possible	2019-07-05 13:03:29 +01:00
Makefile	KVM: arm/arm64: Move cc/it checks under hyp's Makefile to avoid instrumentation	2019-05-24 14:53:20 +01:00
switch.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234	2019-06-19 17:09:07 +02:00
sysreg-sr.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234	2019-06-19 17:09:07 +02:00
tlb.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234	2019-06-19 17:09:07 +02:00
vgic-v2-cpuif-proxy.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234	2019-06-19 17:09:07 +02:00