From: Alexey Kardashevskiy <aik@amd.com>
To: "Nikunj A. Dadhania" <nikunj@amd.com>
Cc: kvm@vger.kernel.org, x86@kernel.org,
linux-kernel@vger.kernel.org, Yury Norov <yury.norov@gmail.com>,
Venu Busireddy <venu.busireddy@oracle.com>,
Tony Luck <tony.luck@intel.com>,
Tom Lendacky <thomas.lendacky@amd.com>,
Thomas Gleixner <tglx@linutronix.de>,
Sean Christopherson <seanjc@google.com>,
Sandipan Das <sandipan.das@amd.com>,
Pawan Gupta <pawan.kumar.gupta@linux.intel.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Michael Roth <michael.roth@amd.com>,
Mario Limonciello <mario.limonciello@amd.com>,
Kim Phillips <kim.phillips@amd.com>,
Kees Cook <keescook@chromium.org>,
Juergen Gross <jgross@suse.com>, Jakub Kicinski <kuba@kernel.org>,
Ingo Molnar <mingo@redhat.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
Daniel Sneddon <daniel.sneddon@linux.intel.com>,
Brijesh Singh <brijesh.singh@amd.com>,
Borislav Petkov <bp@alien8.de>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Adrian Hunter <adrian.hunter@intel.com>,
"Peter Zijlstra (Intel)" <peterz@infradead.org>,
"Jason A. Donenfeld" <Jason@zx2c4.com>,
"H. Peter Anvin" <hpa@zytor.com>
Subject: Re: [PATCH kernel v3 3/3] x86/sev: Do not handle #VC for DR7 read/write
Date: Tue, 24 Jan 2023 23:37:46 +1100 [thread overview]
Message-ID: <ebfcef92-d892-1d7e-004a-1899da968d16@amd.com> (raw)
In-Reply-To: <b30d6f61-2dc9-4c4f-dbdb-a48c186745d3@amd.com>
On 24/1/23 21:37, Nikunj A. Dadhania wrote:>> It is
MSR_AMD64_SEV_DEBUG_SWAP (SEV, not SNP), it is an SEV-ES thing.> Yes,
noticed that, earlier analysis was that Debug Swap shouldn't need any
guest side changes, but it does need it.>>> Why is that feature
negotiation SNP-only and not SEV?> > As per the spec, GHCB termination
request: reason code: 0x2 is SNP features specific.
Does the guest really need to terminate in such case? A VM could just
not do the GHCB thing if it does not want to.
--
Alexey
next prev parent reply other threads:[~2023-01-24 12:38 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-20 3:10 [PATCH kernel v3 0/3] KVM: SEV: Enable AMD SEV-ES DebugSwap Alexey Kardashevskiy
2023-01-20 3:10 ` [PATCH kernel v3 1/3] x86/amd: Cache debug register values in percpu variables Alexey Kardashevskiy
2023-01-31 19:27 ` [tip: x86/cpu] " tip-bot2 for Alexey Kardashevskiy
2023-01-20 3:10 ` [PATCH kernel v3 2/3] KVM: SEV: Enable data breakpoints in SEV-ES Alexey Kardashevskiy
2023-01-31 19:22 ` Borislav Petkov
2023-02-01 2:20 ` Sean Christopherson
2023-02-01 19:32 ` Sean Christopherson
2023-02-03 12:26 ` Borislav Petkov
2023-02-01 2:18 ` Sean Christopherson
2023-02-03 3:37 ` Alexey Kardashevskiy
2023-02-03 5:14 ` [PATCH kernel v4] " Alexey Kardashevskiy
2023-02-21 5:19 ` Alexey Kardashevskiy
2023-03-14 9:43 ` Alexey Kardashevskiy
2023-03-21 6:56 ` Alexey Kardashevskiy
2023-03-23 17:40 ` Sean Christopherson
2023-03-29 15:13 ` Tom Lendacky
2023-03-23 16:39 ` [PATCH kernel v3 2/3] " Sean Christopherson
2023-03-24 4:05 ` Alexey Kardashevskiy
2023-01-20 3:10 ` [PATCH kernel v3 3/3] x86/sev: Do not handle #VC for DR7 read/write Alexey Kardashevskiy
2023-01-20 5:12 ` Nikunj A. Dadhania
2023-01-20 10:23 ` Alexey Kardashevskiy
2023-01-20 12:06 ` Borislav Petkov
2023-01-25 3:11 ` Alexey Kardashevskiy
2023-01-25 5:44 ` Borislav Petkov
2023-01-24 10:37 ` Nikunj A. Dadhania
2023-01-24 12:37 ` Alexey Kardashevskiy [this message]
2023-01-24 13:17 ` Nikunj A. Dadhania
2023-01-30 0:56 ` [PATCH kernel v4 " Alexey Kardashevskiy
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