linux-kernel - [PATCH v12 0/4] set VSESR_EL2 by user space and support NOTIFY

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Message-ID: <1526417887-25843-1-git-send-email-gengdongjiu@huawei.com>
Date:   Wed, 16 May 2018 04:58:03 +0800
From:   Dongjiu Geng <gengdongjiu@...wei.com>
To:     <rkrcmar@...hat.com>, <corbet@....net>, <christoffer.dall@....com>,
        <marc.zyngier@....com>, <james.morse@....com>,
        <linux@...linux.org.uk>, <catalin.marinas@....com>,
        <rjw@...ysocki.net>, <bp@...en8.de>, <lenb@...nel.org>,
        <kvm@...r.kernel.org>, <linux-doc@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <kvmarm@...ts.cs.columbia.edu>, <linux-acpi@...r.kernel.org>,
        <devel@...ica.org>
CC:     <gengdongjiu@...wei.com>, <huangshaoyu@...wei.com>,
        <zhengxiang9@...wei.com>
Subject: [PATCH v12 0/4] set VSESR_EL2 by user space and support NOTIFY_SEI notification

1. Detect whether KVM can set set guest SError syndrome
2. Support to Set VSESR_EL2 and inject SError by user space.
3. Support live migration to keep SError pending state and VSESR_EL2 value.
4. ACPI 6.1 adds support for NOTIFY_SEI as a GHES notification mechanism, so support this
   notification in software, KVM or kernel ARCH code call handle_guest_sei() to let ACP driver
   to handle this notification.

Change since V11:
Address James's comments, thanks James
1. Align the struct of kvm_vcpu_events to 64 bytes
2. Avoid exposing the stale ESR value in the kvm_arm_vcpu_get_events()
3. Change variables 'injected' name to 'serror_pending' in the kvm_arm_vcpu_set_events()
4. Change to sizeof(events) from sizeof(struct kvm_vcpu_events) in kvm_arch_vcpu_ioctl()
5. Update the patches commit message and document description


Change since V10:
Address James's comments, thanks James
1. Merge the helper function with the user.
2. Move the ISS_MASK into pend_guest_serror() to clear top bits
3. Make kvm_vcpu_events struct align to 4 bytes
4. Add something check in the kvm_arm_vcpu_set_events()
5. Check kvm_arm_vcpu_get/set_events()'s return value.
6. Initialise kvm_vcpu_events to 0 so that padding transferred to user-space doesn't
    contain kernel stack.


Dongjiu Geng (4):
  arm64: KVM: export the capability to set guest SError syndrome
  arm/arm64: KVM: Add KVM_GET/SET_VCPU_EVENTS
  ACPI / APEI: Add SEI notification type support for ARMv8
  arm64: handle NOTIFY_SEI notification by the APEI driver

 Documentation/virtual/kvm/api.txt    | 42 ++++++++++++++++++++++++++--
 arch/arm/include/asm/kvm_host.h      |  6 ++++
 arch/arm/kvm/guest.c                 | 12 ++++++++
 arch/arm64/include/asm/kvm_emulate.h |  5 ++++
 arch/arm64/include/asm/kvm_host.h    |  7 +++++
 arch/arm64/include/asm/system_misc.h |  1 +
 arch/arm64/include/uapi/asm/kvm.h    | 13 +++++++++
 arch/arm64/kernel/traps.c            |  4 +++
 arch/arm64/kvm/guest.c               | 36 ++++++++++++++++++++++++
 arch/arm64/kvm/inject_fault.c        |  7 ++++-
 arch/arm64/kvm/reset.c               |  4 +++
 arch/arm64/mm/fault.c                | 10 +++++++
 drivers/acpi/apei/Kconfig            | 15 ++++++++++
 drivers/acpi/apei/ghes.c             | 53 ++++++++++++++++++++++++++++++++++++
 include/acpi/ghes.h                  |  1 +
 include/uapi/linux/kvm.h             |  1 +
 virt/kvm/arm/arm.c                   | 21 ++++++++++++++
 17 files changed, 234 insertions(+), 4 deletions(-)

-- 
1.9.1