From owner-freebsd-xen@freebsd.org Thu Jul 19 10:17:59 2018 Return-Path: Delivered-To: freebsd-xen@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 6FD28102C5DD for ; Thu, 19 Jul 2018 10:17:59 +0000 (UTC) (envelope-from gerd.hafenbrack@gmail.com) Received: from mail-oi0-x234.google.com (mail-oi0-x234.google.com [IPv6:2607:f8b0:4003:c06::234]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 02F1B89E55 for ; Thu, 19 Jul 2018 10:17:58 +0000 (UTC) (envelope-from gerd.hafenbrack@gmail.com) Received: by mail-oi0-x234.google.com with SMTP id w126-v6so14492085oie.7 for ; Thu, 19 Jul 2018 03:17:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:cc; bh=xGNewD2A4PSe60RX/9rCThUKCb3WZIQJ0tQqVnY8zJE=; b=YdoXE6k0lmIYb+TlqCEhYTQgmnpUs9z460Uw3CsxtfAamYr0z0oT8PWI4AIqOKYWzf 6455wWF06D1iwdq0YploLuBVS5Wo/KmAPHh+e92XWa7t3xjQNOZslfseTwS34XUwwfj4 7gs96cIB1pJY7upJembGatVm1NhPdDC3/6N/Jb/mtlJeKoL1EAZ3ED21x/bKcOzY/TQP B3vbBjk982DQklyG/7wqKsyTT0eBMLOPhnyezbQX6fgqT7XCqd95HVHaC+AWbbs0vBY8 AG3JbiPxrkvv5XVI/dIqVKwX2N5lY6Ww+qRMkGCekSse1dadNwB6gR2/XD75rye78RlG fk8w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:cc; bh=xGNewD2A4PSe60RX/9rCThUKCb3WZIQJ0tQqVnY8zJE=; b=bq8/7GiKmSeN2uqYT4Nsy3U69PsHCtLH3fmLkY7bsuL221NDKN+lSq+tHiYULxmTXh o126ZCWi/nux8Rf+Ud97rGoN4AetCoSR1CiQIr8RbzwDomCpz0IpXKyfRp4E5wRwnpN0 2K20EROXE9D7+xUXbRAjhLs4JLPNykT/D0A9oUOLlVjcS5ZWyfEe+cYM1x1zI94cE+0p 0+6K87TKsCY5AQ7oRXlOyoTqjS8e5/OOZ3V3+8e+uv7WsqLV0eiRH5MDOstdszUonxUz TVqga/zKIr+K24qNvFa8yQ2w+NhLmnLyeUrVo9yur+y+QxtY5j4Nr+ZYX8p8uXUyE/Y4 wO6A== X-Gm-Message-State: AOUpUlEW4adZukZeOqF4ubTKxx/wZj3yKoJHIPxHBJ4tZXUr5CXBy/5J IbJ3zBdJBmaQ5JpcOPjbmsk5mWmu/qZf1RQaAAIYZA== X-Google-Smtp-Source: AAOMgpe16gEFGHFkM5Kqs90nz0VyYOjWn+xdKLmisdqESkM73P4ju4JLyWzgfUbFkg5n1axpf48p/LkQW2z0sbIFrAQ= X-Received: by 2002:aca:a982:: with SMTP id s124-v6mr10613310oie.80.1531995477732; Thu, 19 Jul 2018 03:17:57 -0700 (PDT) MIME-Version: 1.0 References: <20180719090444.jojyziar2c6wy735@mac> <20180719095034.6h4rmqoy6hrkkorb@mac> In-Reply-To: <20180719095034.6h4rmqoy6hrkkorb@mac> From: Gerd Hafenbrack Date: Thu, 19 Jul 2018 12:17:46 +0200 Message-ID: Subject: Re: HEADS UP: merged PVHv2 support and future plans Cc: freebsd-xen@freebsd.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.27 X-BeenThere: freebsd-xen@freebsd.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: Discussion of the freebsd port to xen - implementation and usage List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 19 Jul 2018 10:17:59 -0000 Thank you. Roger Pau Monn=C3=A9 schrieb am Do., 19. Juli 2018, = 11:50: > On Thu, Jul 19, 2018 at 11:42:24AM +0200, Gerd Hafenbrack wrote: > > Hello, > > > > Roger Pau Monn=C3=A9 schrieb am Do., 19. Juli 2018= , > 11:05: > > > > > ... Later on, we sadly discovered > > > that PVHv1 was still too similar to classic PV, and didn't allow Xen > > > to make use of all the possible hardware virtualization extensions, s= o > > > PVHv2 was introduced ~2 years ago ... > > > > > > > Is there a page comparing hardware virtualization extensions between > PVHv1 > > and PVHv2? > > Hm, not really. PVHv2 has some devices (either emulated by software or > hardware) that are not present on PVHv1: LAPIC, IO-APIC. The way to > setup and inject interrupts on PVHv2 is also the same as on native > (IO-APIC pin, MSI or MSI-X). > > Also PVHv2 allows to change paging modes (or completely disable > paging), which PVHv1 didn't allow at all. > > To sum up, PVHv2 is very, very similar to HVM but it doesn't require a > QEMU device model in order to run. > > > What about AMD support? We are getting EPIC machines. > > Yes, PVHv2 supports AMD, although I have to admit I haven't done > extensive testing on AMD due to my lack of AMD hardware. I expect > that's going to change soon. > > I've tested PVHv2 FreeBSD DomUs on AMD hardware, but I haven't tested > FreeBSD PVHv2 Dom0 on AMD yet. > > Roger. >