From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 1B834CD8C9D for ; Mon, 8 Jun 2026 14:43:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=7Cxyn77jgcCzoEU189cvE5lf2rFBPGFqFQZfqo2UDKs=; b=yf5OyE0DypjOc9 K8Vl7BODMZXOI1MkQVRwMv/m6iz7siTQVy4cUVYAga+w0FCJevplEnVaO2oOWyS0m2RnA3wx3I9/W QS0kGDgKHczxriu/BwOUcOsfqzfUsXX+QOzn5+O4XPt9CKj8NnP/OXAdiCZ5lqHuU27bXy1uAqJmV bEBki3ZLCSSK1c0Q1TwbKJRnv6cAmsq5rYHKzCbDDR6pal05qSAf0Z7ErdUrG3pgDI+/wkqL9N0Bh DFtG/zQAljb7YjnJrDGUPFrvZLJC7lXmENcdt8kWzsFe2si/bm5ygLqG2i0oFH1riJag58FgXOwEm qf2IIhE4QX4YKLJFbbGw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wWbC4-00000003pTw-2qm0; Mon, 08 Jun 2026 14:43:12 +0000 Received: from mail.8bytes.org ([85.214.250.239]) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wWbC1-00000003pQJ-1jkI for kvm-riscv@lists.infradead.org; Mon, 08 Jun 2026 14:43:10 +0000 Received: from io.home.8bytes.org (p4ffe1d30.dip0.t-ipconnect.de [79.254.29.48]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mail.8bytes.org (Postfix) with ESMTPSA id 41D042028A4; Mon, 8 Jun 2026 16:43:05 +0200 (CEST) From: =?UTF-8?q?J=C3=B6rg=20R=C3=B6del?= To: Paolo Bonzini , Sean Christopherson Cc: Tom Lendacky , ashish.kalra@amd.com, michael.roth@amd.com, nsaenz@amazon.com, anelkz@amazon.de, James.Bottomley@HansenPartnership.com, Melody Wang , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, kvmarm@lists.linux.dev, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm-riscv@lists.infradead.org, x86@kernel.org, coconut-svsm@lists.linux.dev, joerg.roedel@amd.com Subject: [PATCH 01/60] x86/sev: Define the #HV doorbell page structure Date: Mon, 8 Jun 2026 16:41:53 +0200 Message-ID: <20260608144252.351443-2-joro@8bytes.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260608144252.351443-1-joro@8bytes.org> References: <20260608144252.351443-1-joro@8bytes.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260608_074309_603612_5947EDBF X-CRM114-Status: GOOD ( 11.66 ) X-BeenThere: kvm-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "kvm-riscv" Errors-To: kvm-riscv-bounces+kvm-riscv=archiver.kernel.org@lists.infradead.org From: Melody Wang Restricted injection is a feature which enforces additional interrupt and event injection security protections for a SEV-SNP guest. It disables all hypervisor-based interrupt queuing and event injection of all vectors except a new exception vector, #HV (28), which is reserved for SNP guest use, but never generated by hardware. #HV is only allowed to be injected into VMSAs that execute with Restricted Injection. The guests running with the SNP restricted injection feature active limit the host to ringing a doorbell with a #HV exception. Define two fields in the #HV doorbell page: a pending event field, and an EOI assist. Create the structure definition for the #HV doorbell page as per GHCB specification. Co-developed-by: Thomas Lendacky Signed-off-by: Thomas Lendacky Signed-off-by: Melody Wang Signed-off-by: Joerg Roedel --- arch/x86/include/asm/svm.h | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/arch/x86/include/asm/svm.h b/arch/x86/include/asm/svm.h index bcfeb5e7c0ed..9822b0b346ae 100644 --- a/arch/x86/include/asm/svm.h +++ b/arch/x86/include/asm/svm.h @@ -252,6 +252,39 @@ struct __attribute__ ((__packed__)) vmcb_control_area { #define SVM_TSC_RATIO_MAX 0x000000ffffffffffULL #define SVM_TSC_RATIO_DEFAULT 0x0100000000ULL +/* + * Hypervisor doorbell page: + * + * Used when Restricted Injection is enabled for a VM. One page in size that + * is shared between the guest and hypervisor to communicate exception and + * interrupt events. + */ +struct hvdb_events { + /* First 64 bytes of HV doorbell page defined in GHCB specification */ + union { + struct { + /* Non-maskable event indicators */ + u16 vector: 8, + nmi: 1, + mce: 1, + reserved2: 5, + no_further_signal: 1; + }; + + u16 pending_events; + }; + + u8 no_eoi_required; + + u8 reserved3[61]; +}; + +struct hvdb { + struct hvdb_events events; + + /* Remainder of the page is for software use */ + u8 reserved[PAGE_SIZE - sizeof(struct hvdb_events)]; +}; /* AVIC */ #define AVIC_LOGICAL_ID_ENTRY_GUEST_PHYSICAL_ID_MASK (0xFFULL) -- 2.53.0 -- kvm-riscv mailing list kvm-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kvm-riscv