From: Paolo Bonzini <pbonzini@redhat.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: mlevitsk@redhat.com, seanjc@google.com
Subject: [PATCH v2 00/13] fixes and cleanups for string I/O emulation
Date: Fri, 22 Oct 2021 11:36:03 -0400 [thread overview]
Message-ID: <20211022153616.1722429-1-pbonzini@redhat.com> (raw)
This series is split in two parts:
- patch 7 fixes a bug in string I/O emulation for SEV-ES, where
the size of the GHCB buffer can exceed the size of vcpu->arch.pio_data.
If that happens, we need to go over the GHCB buffer in multiple passes.
There are some preliminary cleanups in patches 1/3/6 too.
- the other patches clean emulator_pio_in and emulator_pio_in_out. The
first changes (patches 2/3/5) are more localized; they make the final
SEV code a little easier to follow, and they remove unnecessary
function arguments so that it is clearer which functions consume
vcpu->arch.pio and which don't. Patches starting from 8 on, instead,
remove all usage of vcpu->arch.pio unless a userspace KVM_EXIT_IO is
required. In the end, IN is split clearly into a function that
(if needed) fills in vcpu->arch.pio, and one that is intended for
completion callbacks and consumes it.
Tested by booting a SEV-ES guest and with "regular" kvm-unit-tests.
Paolo
Paolo Bonzini (13):
KVM: SEV-ES: rename guest_ins_data to sev_pio_data
KVM: x86: leave vcpu->arch.pio.count alone in emulator_pio_in_out
KVM: SEV-ES: clean up kvm_sev_es_ins/outs
KVM: x86: split the two parts of emulator_pio_in
KVM: x86: remove unnecessary arguments from complete_emulator_pio_in
KVM: SEV-ES: keep INS functions together
KVM: SEV-ES: go over the sev_pio_data buffer in multiple passes if
needed
KVM: x86: inline kernel_pio into its sole caller
KVM: x86: move all vcpu->arch.pio* setup in emulator_pio_in_out
KVM: x86: wean in-kernel PIO from vcpu->arch.pio*
KVM: x86: wean fast IN from emulator_pio_in
KVM: x86: de-underscorify __emulator_pio_in
KVM: SEV-ES: reuse advance_sev_es_emulated_ins for OUT too
arch/x86/include/asm/kvm_host.h | 3 +-
arch/x86/kvm/trace.h | 2 +-
arch/x86/kvm/x86.c | 193 +++++++++++++++++++-------------
3 files changed, 117 insertions(+), 81 deletions(-)
--
2.27.0
next reply other threads:[~2021-10-22 15:36 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-22 15:36 Paolo Bonzini [this message]
2021-10-22 15:36 ` [PATCH 01/13] KVM: SEV-ES: rename guest_ins_data to sev_pio_data Paolo Bonzini
2021-10-22 15:36 ` [PATCH 02/13] KVM: x86: leave vcpu->arch.pio.count alone in emulator_pio_in_out Paolo Bonzini
2021-10-22 15:36 ` [PATCH 03/13] KVM: SEV-ES: clean up kvm_sev_es_ins/outs Paolo Bonzini
2021-10-22 15:36 ` [PATCH 04/13] KVM: x86: split the two parts of emulator_pio_in Paolo Bonzini
2021-10-22 15:36 ` [PATCH 05/13] KVM: x86: remove unnecessary arguments from complete_emulator_pio_in Paolo Bonzini
2021-10-22 15:36 ` [PATCH 06/13] KVM: SEV-ES: keep INS functions together Paolo Bonzini
2021-10-22 15:36 ` [PATCH 07/13] KVM: SEV-ES: go over the sev_pio_data buffer in multiple passes if needed Paolo Bonzini
2021-10-22 15:36 ` [PATCH 08/13] KVM: x86: inline kernel_pio into its sole caller Paolo Bonzini
2021-10-26 13:55 ` Maxim Levitsky
2021-10-22 15:36 ` [PATCH 09/13] KVM: x86: move all vcpu->arch.pio* setup in emulator_pio_in_out Paolo Bonzini
2021-10-26 13:56 ` Maxim Levitsky
2021-10-22 15:36 ` [PATCH 10/13] KVM: x86: wean in-kernel PIO from vcpu->arch.pio* Paolo Bonzini
2021-10-26 13:56 ` Maxim Levitsky
2021-10-22 15:36 ` [PATCH 11/13] KVM: x86: wean fast IN from emulator_pio_in Paolo Bonzini
2021-10-26 13:56 ` Maxim Levitsky
2021-10-22 15:36 ` [PATCH 12/13] KVM: x86: de-underscorify __emulator_pio_in Paolo Bonzini
2021-10-26 13:56 ` Maxim Levitsky
2021-10-22 15:36 ` [PATCH 13/13] KVM: SEV-ES: reuse advance_sev_es_emulated_ins for OUT too Paolo Bonzini
2021-10-26 13:57 ` Maxim Levitsky
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