linux-kernel - Re: [PATCH 2/2] tools/x86/kcpuid: Add AMD leaf 0x8000001E

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Date:   Tue, 16 Mar 2021 15:42:23 +0800
From:   Feng Tang <feng.tang@...el.com>
To:     Borislav Petkov <bp@...en8.de>
Cc:     X86 ML <x86@...nel.org>, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] tools/x86/kcpuid: Add AMD leaf 0x8000001E

On Mon, Mar 15, 2021 at 01:59:01PM +0100, Borislav Petkov wrote:
> From: Borislav Petkov <bp@...e.de>
> 
> Contains core IDs, node IDs and other topology info.
> 
> Signed-off-by: Borislav Petkov <bp@...e.de>

Acked-by: Feng Tang <feng.tang@...el.com>

Also I'm wondering for some basic leaf and extended leaf which
may has different definition for different vendors, do we need
to seprate the csv to a general one and vendor specific ones.

Thanks,
Feng

> ---
>  tools/arch/x86/kcpuid/cpuid.csv | 26 ++++++++++++++++++--------
>  1 file changed, 18 insertions(+), 8 deletions(-)
> 
> diff --git a/tools/arch/x86/kcpuid/cpuid.csv b/tools/arch/x86/kcpuid/cpuid.csv
> index dd94c07421a8..4f1c4b0c29e9 100644
> --- a/tools/arch/x86/kcpuid/cpuid.csv
> +++ b/tools/arch/x86/kcpuid/cpuid.csv
> @@ -379,12 +379,22 @@
>  0x80000008,    0,  EAX,   15:8, lnr_adr_bits, Linear Address Bits
>  0x80000007,    0,  EBX,      9, wbnoinvd, WBNOINVD
>  
> +# 0x8000001E
> +# EAX: Extended APIC ID
> +0x8000001E,	0, EAX,   31:0, extended_apic_id, Extended APIC ID
> +# EBX: Core Identifiers
> +0x8000001E,	0, EBX,    7:0, core_id, Identifies the logical core ID
> +0x8000001E,	0, EBX,   15:8, threads_per_core, The number of threads per core is threads_per_core + 1
> +# ECX: Node Identifiers
> +0x8000001E,	0, ECX,    7:0, node_id, Node ID
> +0x8000001E,	0, ECX,   10:8, nodes_per_processor, Nodes per processor { 0: 1 node, else reserved }
> +
>  # 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
> +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