linux-kernel - Re: [PATCH] tools/x86/kcpuid: Add AMD Secure Encryption leaf

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Date:   Sun, 14 Mar 2021 01:35:27 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     X86 ML <x86@...nel.org>
Cc:     Feng Tang <feng.tang@...el.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] tools/x86/kcpuid: Add AMD Secure Encryption leaf

On Sat, Mar 13, 2021 at 03:01:18PM +0100, Borislav Petkov wrote:
> From: Borislav Petkov <bp@...e.de>
> 
> Add the 0x8000001f leaf's fields.
> 
> Signed-off-by: Borislav Petkov <bp@...e.de>
> ---
>  tools/arch/x86/kcpuid/cpuid.csv | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/tools/arch/x86/kcpuid/cpuid.csv b/tools/arch/x86/kcpuid/cpuid.csv
> index f4a5b85073f4..7cb5c2189345 100644
> --- a/tools/arch/x86/kcpuid/cpuid.csv
> +++ b/tools/arch/x86/kcpuid/cpuid.csv
> @@ -378,3 +378,13 @@
>  0x80000008,    0,  EAX,    7:0, phy_adr_bits, Physical Address Bits
>  0x80000008,    0,  EAX,   15:8, lnr_adr_bits, Linear Address Bits
>  0x80000007,    0,  EBX,      9, wbnoinvd, WBNOINVD
> +
> +# 8000001F: AMD Secure Encryption
> +0x8000001F,	0, EAX, 0, SME,	Secure Memory Encryption
> +0x8000001F,	0, EAX, 1, SEV,	Secure Encrypted Virtualization
> +0x8000001F,	0, EAX, 2, VmPgFlush, VM Page Flush MSR
> +0x8000001F,	0, EAX, 3, SevEs, SEV Encrypted State
> +0x8000001F,	0, EBX, 5:0, C-Bit, Page table bit number used to enable memory encryption
> +0x8000001F,	0, EBX, 11:6, MemEncryptPhysAddWidth, Reduction of physical address space in bits when SME is enabled
> +0x8000001F,	0, ECX, 31:0, NumEncryptedGuests, Maximum ASID value that may be used for an SEV-enabled guest
> +0x8000001F,	0, EDX, 31:0, MinimumSEVASID, Minimum ASID value that must be used for an SEV-enabled, SEV-ES-disabled guest

Yeah, I guess we should keep the bit names in lowercase, for simplicity.

---
From: Borislav Petkov <bp@...e.de>
Date: Sat, 13 Mar 2021 14:56:16 +0100
Subject: [PATCH] tools/x86/kcpuid: Add AMD Secure Encryption leaf

Add the 0x8000001f leaf's fields.

Signed-off-by: Borislav Petkov <bp@...e.de>
---
 tools/arch/x86/kcpuid/cpuid.csv | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/tools/arch/x86/kcpuid/cpuid.csv b/tools/arch/x86/kcpuid/cpuid.csv
index f4a5b85073f4..dd94c07421a8 100644
--- a/tools/arch/x86/kcpuid/cpuid.csv
+++ b/tools/arch/x86/kcpuid/cpuid.csv
@@ -378,3 +378,13 @@
 0x80000008,    0,  EAX,    7:0, phy_adr_bits, Physical Address Bits
 0x80000008,    0,  EAX,   15:8, lnr_adr_bits, Linear Address Bits
 0x80000007,    0,  EBX,      9, wbnoinvd, WBNOINVD
+
+# 8000001F: AMD Secure Encryption
+0x8000001F,	0, EAX, 0, sme,	Secure Memory Encryption
+0x8000001F,	0, EAX, 1, sev,	Secure Encrypted Virtualization
+0x8000001F,	0, EAX, 2, vmpgflush, VM Page Flush MSR
+0x8000001F,	0, EAX, 3, seves, SEV Encrypted State
+0x8000001F,	0, EBX, 5:0, c-bit, Page table bit number used to enable memory encryption
+0x8000001F,	0, EBX, 11:6, mem_encrypt_physaddr_width, Reduction of physical address space in bits with SME enabled
+0x8000001F,	0, ECX, 31:0, num_encrypted_guests, Maximum ASID value that may be used for an SEV-enabled guest
+0x8000001F,	0, EDX, 31:0, minimum_sev_asid, Minimum ASID value that must be used for an SEV-enabled, SEV-ES-disabled guest
-- 
2.29.2

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette