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]
Message-ID: <175680940200.1920.8820779000967521417.tip-bot2@tip-bot2>
Date: Tue, 02 Sep 2025 10:36:42 -0000
From: "tip-bot2 for Kishon Vijay Abraham I" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Kishon Vijay Abraham I <kvijayab@....com>,
 Neeraj Upadhyay <Neeraj.Upadhyay@....com>,
 "Borislav Petkov (AMD)" <bp@...en8.de>, Tianyu Lan <tiala@...rosoft.com>,
 x86@...nel.org, linux-kernel@...r.kernel.org
Subject:
 [tip: x86/apic] x86/sev: Initialize VGIF for secondary vCPUs for Secure AVIC

The following commit has been merged into the x86/apic branch of tip:

Commit-ID:     c77683eccf53428a6934df76702e33c0faf46fe5
Gitweb:        https://git.kernel.org/tip/c77683eccf53428a6934df76702e33c0faf46fe5
Author:        Kishon Vijay Abraham I <kvijayab@....com>
AuthorDate:    Thu, 28 Aug 2025 16:41:41 +05:30
Committer:     Borislav Petkov (AMD) <bp@...en8.de>
CommitterDate: Mon, 01 Sep 2025 12:48:35 +02:00

x86/sev: Initialize VGIF for secondary vCPUs for Secure AVIC

Virtual GIF (VGIF) provides masking capability for when virtual interrupts
(virtual maskable interrupts, virtual NMIs) can be taken by the guest vCPU.

The Secure AVIC hardware reads VGIF state from the vCPU's VMSA. So, set VGIF for
secondary CPUs (the configuration for the boot CPU is done by the hypervisor),
to unmask delivery of virtual interrupts  to the vCPU.

Signed-off-by: Kishon Vijay Abraham I <kvijayab@....com>
Signed-off-by: Neeraj Upadhyay <Neeraj.Upadhyay@....com>
Signed-off-by: Borislav Petkov (AMD) <bp@...en8.de>
Reviewed-by: Tianyu Lan <tiala@...rosoft.com>
Link: https://lore.kernel.org/20250828111141.208920-1-Neeraj.Upadhyay@amd.com
---
 arch/x86/coco/sev/core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/coco/sev/core.c b/arch/x86/coco/sev/core.c
index da9fa9d..37b1d41 100644
--- a/arch/x86/coco/sev/core.c
+++ b/arch/x86/coco/sev/core.c
@@ -974,6 +974,9 @@ static int wakeup_cpu_via_vmgexit(u32 apic_id, unsigned long start_ip, unsigned 
 	vmsa->x87_ftw		= AP_INIT_X87_FTW_DEFAULT;
 	vmsa->x87_fcw		= AP_INIT_X87_FCW_DEFAULT;
 
+	if (cc_platform_has(CC_ATTR_SNP_SECURE_AVIC))
+		vmsa->vintr_ctrl	|= V_GIF_MASK;
+
 	/* SVME must be set. */
 	vmsa->efer		= EFER_SVME;
 

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ