From: Borislav Petkov <bp@alien8.de>
To: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: Dave Hansen <dave.hansen@linux.intel.com>,
Andy Lutomirski <luto@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Sean Christopherson <seanjc@google.com>,
Jim Mattson <jmattson@google.com>,
David Rientjes <rientjes@google.com>,
"Edgecombe, Rick P" <rick.p.edgecombe@intel.com>,
"Kleen, Andi" <andi.kleen@intel.com>,
"Yamahata, Isaku" <isaku.yamahata@intel.com>,
x86@kernel.org, kvm@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Subject: Re: [RFCv1 2/7] x86/kvm: Introduce KVM memory protection feature
Date: Thu, 8 Apr 2021 11:52:35 +0200 [thread overview]
Message-ID: <20210408095235.GH10192@zn.tnic> (raw)
In-Reply-To: <20210402152645.26680-3-kirill.shutemov@linux.intel.com>
On Fri, Apr 02, 2021 at 06:26:40PM +0300, Kirill A. Shutemov wrote:
> Provide basic helpers, KVM_FEATURE, CPUID flag and a hypercall.
>
> Host side doesn't provide the feature yet, so it is a dead code for now.
>
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> ---
> arch/x86/include/asm/cpufeatures.h | 1 +
> arch/x86/include/asm/kvm_para.h | 5 +++++
> arch/x86/include/uapi/asm/kvm_para.h | 3 ++-
> arch/x86/kernel/kvm.c | 18 ++++++++++++++++++
> include/uapi/linux/kvm_para.h | 3 ++-
> 5 files changed, 28 insertions(+), 2 deletions(-)
>
> diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h
> index 84b887825f12..5b6f23e6edc4 100644
> --- a/arch/x86/include/asm/cpufeatures.h
> +++ b/arch/x86/include/asm/cpufeatures.h
> @@ -238,6 +238,7 @@
> #define X86_FEATURE_VMW_VMMCALL ( 8*32+19) /* "" VMware prefers VMMCALL hypercall instruction */
> #define X86_FEATURE_SEV_ES ( 8*32+20) /* AMD Secure Encrypted Virtualization - Encrypted State */
> #define X86_FEATURE_VM_PAGE_FLUSH ( 8*32+21) /* "" VM Page Flush MSR is supported */
> +#define X86_FEATURE_KVM_MEM_PROTECTED ( 8*32+22) /* KVM memory protection extenstion */
^^^^^^^^^^
What's that feature bit for?
Also, use a spellchecker pls: "extenstion".
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
next prev parent reply other threads:[~2021-04-08 9:52 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-02 15:26 [RFCv1 0/7] TDX and guest memory unmapping Kirill A. Shutemov
2021-04-02 15:26 ` [RFCv1 1/7] x86/mm: Move force_dma_unencrypted() to common code Kirill A. Shutemov
2021-04-02 15:26 ` [RFCv1 2/7] x86/kvm: Introduce KVM memory protection feature Kirill A. Shutemov
2021-04-08 9:52 ` Borislav Petkov [this message]
2021-04-09 13:36 ` Kirill A. Shutemov
2021-04-09 14:37 ` Borislav Petkov
2021-04-02 15:26 ` [RFCv1 3/7] x86/kvm: Make DMA pages shared Kirill A. Shutemov
2021-04-02 15:26 ` [RFCv1 4/7] x86/kvm: Use bounce buffers for KVM memory protection Kirill A. Shutemov
2021-04-02 15:26 ` [RFCv1 5/7] x86/kvmclock: Share hvclock memory with the host Kirill A. Shutemov
2021-04-02 15:26 ` [RFCv1 6/7] x86/realmode: Share trampoline area if KVM memory protection enabled Kirill A. Shutemov
2021-04-02 15:26 ` [RFCv1 7/7] KVM: unmap guest memory using poisoned pages Kirill A. Shutemov
2021-04-06 7:44 ` David Hildenbrand
2021-04-06 10:50 ` Kirill A. Shutemov
2021-04-06 14:33 ` Dave Hansen
2021-04-06 14:57 ` David Hildenbrand
2021-04-07 13:16 ` Kirill A. Shutemov
2021-04-07 13:31 ` Christophe de Dinechin
2021-04-07 14:09 ` Andi Kleen
2021-04-07 14:09 ` David Hildenbrand
2021-04-07 14:36 ` Kirill A. Shutemov
2021-04-06 17:52 ` Tom Lendacky
2021-04-07 14:55 ` David Hildenbrand
2021-04-07 15:10 ` Andi Kleen
2021-04-09 13:33 ` Kirill A. Shutemov
2021-04-09 13:50 ` David Hildenbrand
2021-04-09 14:12 ` Kirill A. Shutemov
2021-04-09 14:18 ` David Hildenbrand
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