linux-kernel - [PATCH kernel v2 0/3] KVM: SEV: Enable AMD SEV-ES DebugSwap

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Message-ID: <20221209043804.942352-1-aik@amd.com>
Date:   Fri, 9 Dec 2022 15:38:01 +1100
From:   Alexey Kardashevskiy <aik@....com>
To:     <kvm@...r.kernel.org>
CC:     <x86@...nel.org>, <linux-kernel@...r.kernel.org>,
        Venu Busireddy <venu.busireddy@...cle.com>,
        Tony Luck <tony.luck@...el.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        "Sean Christopherson" <seanjc@...gle.com>,
        Sandipan Das <sandipan.das@....com>,
        Peter Zijlstra <peterz@...radead.org>,
        Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Michael Roth <michael.roth@....com>,
        Mario Limonciello <mario.limonciello@....com>,
        Jan Kara <jack@...e.cz>, Ingo Molnar <mingo@...hat.com>,
        Huang Rui <ray.huang@....com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Daniel Sneddon <daniel.sneddon@...ux.intel.com>,
        Brijesh Singh <brijesh.singh@....com>,
        Borislav Petkov <bp@...en8.de>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Andrew Cooper <andrew.cooper3@...rix.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        "Jason A. Donenfeld" <Jason@...c4.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Alexey Kardashevskiy <aik@....com>
Subject: [PATCH kernel v2 0/3] KVM: SEV: Enable AMD SEV-ES DebugSwap

This is to use another AMD SEV-ES hardware assisted register swap,
more detail in 2/3. The patches are fairly independend but required in
this order.

This is based on sha1 0d1409e4ff08 and requires something like this
for X86_FEATURE_NO_NESTED_DATA_BP:
https://lkml.org/lkml/2022/11/29/1229

This patchset is pushed out at
https://github.com/aik/linux/commits/debugswap


Please comment. Thanks.

btw the enormous cc: list came from get_maintainer.pl, keep it like
this or tell the script something to reduce the list?


Alexey Kardashevskiy (3):
  x86/amd: Cache values in percpu variables
  KVM: SEV: Enable data breakpoints in SEV-ES
  x86/sev: Do not handle #VC for DR7 read/write

 arch/x86/include/asm/debugreg.h        |  9 +++-
 arch/x86/include/asm/msr-index.h       |  1 +
 arch/x86/include/asm/svm.h             |  1 +
 arch/x86/kvm/svm/svm.h                 | 16 +++++--
 tools/arch/x86/include/asm/msr-index.h |  1 +
 arch/x86/kernel/cpu/amd.c              | 45 ++++++++++++++------
 arch/x86/kernel/sev.c                  |  6 +++
 arch/x86/kvm/svm/sev.c                 | 29 +++++++++++++
 arch/x86/kvm/svm/svm.c                 |  3 +-
 9 files changed, 90 insertions(+), 21 deletions(-)

-- 
2.38.1