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c=relaxed/relaxed; d=alien8.de; s=dkim; t=1598867145; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:in-reply-to:in-reply-to: references:references; bh=ekJdpwvphjOKlQIbAp+8+LkeKmG6PBAegFPKIHvH6zs=; b=hDnCxTDT3/Oj4fPBE0hGDA8UVt83lzNbYfBzkn2257MEQfuxFndrFvIi3Yt+02BBUttPxQ T0WLfkj3j5FBOZg14SLzJe1sh2+JrPkGiEhW1EeB7GhRBbh2s442flj2V1Bthgr1j/eiJb xVte/nnElLdX6F54j7hYn5Y6RzOZZyI= Date: Mon, 31 Aug 2020 11:45:41 +0200 From: Borislav Petkov To: Joerg Roedel Subject: Re: [PATCH v6 42/76] x86/sev-es: Setup early #VC handler Message-ID: <20200831094541.GD27517@zn.tnic> References: <20200824085511.7553-1-joro@8bytes.org> <20200824085511.7553-43-joro@8bytes.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200824085511.7553-43-joro@8bytes.org> Cc: Juergen Gross , Tom Lendacky , Dave Hansen , Mike Stunes , Kees Cook , kvm@vger.kernel.org, Peter Zijlstra , Cfir Cohen , x86@kernel.org, linux-kernel@vger.kernel.org, Sean Christopherson , virtualization@lists.linux-foundation.org, Martin Radev , Joerg Roedel , Masami Hiramatsu , Andy Lutomirski , hpa@zytor.com, Erdem Aktas , David Rientjes , Dan Williams , Jiri Slaby X-BeenThere: virtualization@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux virtualization List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" On Mon, Aug 24, 2020 at 10:54:37AM +0200, Joerg Roedel wrote: > +#ifdef CONFIG_AMD_MEM_ENCRYPT > +static void set_early_idt_handler(gate_desc *idt, int n, void *handler) > +{ > + struct idt_data data; > + gate_desc desc; > + > + init_idt_data(&data, n, handler); > + idt_init_desc(&desc, &data); > + native_write_idt_entry(idt, n, &desc); > +} > +#endif > + > +static struct desc_ptr early_idt_descr __initdata = { > + .size = IDT_TABLE_SIZE - 1, > + .address = 0 /* Needs physical address of idt_table - initialized at runtime. */, > +}; > + > +void __init early_idt_setup(unsigned long physbase) > +{ > + void __maybe_unused *handler; > + gate_desc *idt; > + > + idt = fixup_pointer(idt_table, physbase); > + > +#ifdef CONFIG_AMD_MEM_ENCRYPT > + /* VMM Communication Exception */ > + handler = fixup_pointer(vc_no_ghcb, physbase); > + set_early_idt_handler(idt, X86_TRAP_VC, handler); This function is used only once AFAICT - you might just as well add its three-lined body here and save yourself the function definition and ifdeffery above... > +#endif > + > + /* Initialize IDT descriptor and load IDT */ > + early_idt_descr.address = (unsigned long)idt; > + native_load_idt(&early_idt_descr); > +} > -- > 2.28.0 > -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization