linux-kernel - Re: [PATCH v9 1/8] x86/vmware: Correct macro names

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Thu, 25 Apr 2024 17:21:30 +0200
From: Borislav Petkov <bp@...en8.de>
To: Alexey Makhalov <alexey.makhalov@...adcom.com>
Cc: linux-kernel@...r.kernel.org, virtualization@...ts.linux.dev,
	hpa@...or.com, dave.hansen@...ux.intel.com, mingo@...hat.com,
	tglx@...utronix.de, x86@...nel.org, netdev@...r.kernel.org,
	richardcochran@...il.com, linux-input@...r.kernel.org,
	dmitry.torokhov@...il.com, zackr@...are.com,
	linux-graphics-maintainer@...are.com, pv-drivers@...are.com,
	timothym@...are.com, akaher@...are.com,
	dri-devel@...ts.freedesktop.org, daniel@...ll.ch, airlied@...il.com,
	tzimmermann@...e.de, mripard@...nel.org,
	maarten.lankhorst@...ux.intel.com, horms@...nel.org,
	kirill.shutemov@...ux.intel.com
Subject: Re: [PATCH v9 1/8] x86/vmware: Correct macro names

On Wed, Apr 24, 2024 at 04:14:06PM -0700, Alexey Makhalov wrote:
> VCPU_RESERVED and LEGACY_X2APIC are not VMware hypercall commands.
> These are bits in return value of VMWARE_CMD_GETVCPU_INFO command.
> Change VMWARE_CMD_ prefix to GETVCPU_INFO_ one. And move bit-shift
> operation to the macro body.

I don't understand:

$ git grep GETVCPU_INFO
arch/x86/kernel/cpu/vmware.c:51:#define VMWARE_CMD_GETVCPU_INFO  68
arch/x86/kernel/cpu/vmware.c:478:       VMWARE_CMD(GETVCPU_INFO, eax, ebx, ecx, edx);

so that's a VMWARE_CMD 68, at least the prefix says so.

And those two are *bits* in that eax which that hypercall returns.

Or are those two bits generic but defined in a vmware-specific
hypercall?

Hm.

-- 
Regards/Gruss,
    Boris.

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