From: Borislav Petkov <bp@alien8.de>
To: Alexey Kardashevskiy <aik@amd.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>,
kvm@vger.kernel.org, x86@kernel.org,
linux-kernel@vger.kernel.org,
Venu Busireddy <venu.busireddy@oracle.com>,
Tony Luck <tony.luck@intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
Sean Christopherson <seanjc@google.com>,
Sandipan Das <sandipan.das@amd.com>,
Peter Zijlstra <peterz@infradead.org>,
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>,
Jan Kara <jack@suse.cz>, Ingo Molnar <mingo@redhat.com>,
Huang Rui <ray.huang@amd.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
Daniel Sneddon <daniel.sneddon@linux.intel.com>,
Brijesh Singh <brijesh.singh@amd.com>,
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>,
"Jason A. Donenfeld" <Jason@zx2c4.com>,
"H. Peter Anvin" <hpa@zytor.com>
Subject: Re: [PATCH kernel v2 2/3] KVM: SEV: Enable data breakpoints in SEV-ES
Date: Thu, 12 Jan 2023 12:28:47 +0100 [thread overview]
Message-ID: <Y7/u76mREet2IrtQ@zn.tnic> (raw)
In-Reply-To: <f18c83ac-dc9a-6173-7ab3-d5e3718a0047@amd.com>
On Thu, Jan 12, 2023 at 04:45:34PM +1100, Alexey Kardashevskiy wrote:
> Well, SEV-ES KVM (ES == Encrypted State) does not save/restore them for the
> guest (well, as I would expect) as the guest registers are not visible to
> host to save, they are intercepted and the VM does this GHCB dance with
> VMGEXIT(SVM_EXIT_WRITE_DR7).
But they're saved in the VMSA, as Table B-3 says.
> Well, the only place in APM is that "Table B-3. Swap Types and the AMD APM
> volume 2", and it is pretty brief, do I miss something?
I don't understand that question - please elaborate.
Thx.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
next prev parent reply other threads:[~2023-01-12 11:38 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-09 4:38 [PATCH kernel v2 0/3] KVM: SEV: Enable AMD SEV-ES DebugSwap Alexey Kardashevskiy
2022-12-09 4:38 ` [PATCH kernel v2 1/3] x86/amd: Cache values in percpu variables Alexey Kardashevskiy
2023-01-10 16:05 ` Borislav Petkov
2023-01-12 5:21 ` Alexey Kardashevskiy
2023-01-12 11:12 ` Borislav Petkov
2022-12-09 4:38 ` [PATCH kernel v2 2/3] KVM: SEV: Enable data breakpoints in SEV-ES Alexey Kardashevskiy
2023-01-10 18:00 ` Borislav Petkov
2023-01-10 19:06 ` Tom Lendacky
2023-01-12 5:45 ` Alexey Kardashevskiy
2023-01-12 11:28 ` Borislav Petkov [this message]
2023-01-12 14:32 ` Tom Lendacky
2022-12-09 4:38 ` [PATCH kernel v2 3/3] x86/sev: Do not handle #VC for DR7 read/write Alexey Kardashevskiy
2023-01-10 20:04 ` Borislav Petkov
2023-01-09 5:20 ` [PATCH kernel v2 0/3] KVM: SEV: Enable AMD SEV-ES DebugSwap Alexey Kardashevskiy
2023-01-10 17:41 ` Borislav Petkov
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