Date: Tue, 21 Feb 2017 08:07:12 +0000 From: "decui_microsoft.com (Dexuan Cui)" <phabric-noreply@FreeBSD.org> To: freebsd-virtualization@freebsd.org Subject: [Differential] D9686: fix UEFI VM's bootup on Hyper-V (i.e. Hyper-V Generation-2 VM) Message-ID: <8d9dcf645228cfd71eb6a5f3d2e33c84@localhost.localdomain> In-Reply-To: <differential-rev-PHID-DREV-uh6r5mtg6hczhprjdyvk-req@FreeBSD.org> References: <differential-rev-PHID-DREV-uh6r5mtg6hczhprjdyvk-req@FreeBSD.org>
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decui_microsoft.com added inline comments. INLINE COMMENTS > kib wrote in copy.c:79-84 > UEFI firmware is guaranteed to be executed with VA==PA indeed, but loader changes the mapping after ExitBootServices(), making each 2G VA mapped by low 2G physical. > > I did not wrote anything about issues in your patch, rather, I tried to enumerate problems that must be handled to allow boot from arbitrary UEFI memory map. @kib Got it. Thanks a lot for sharing the details about the background! Yeah, I've realized the complexity of booting from arbitrary address, which would require a lot of really in-depth and long term work. So I'd like to use this patch as a temporary workaround for UEFI VM on Hyper-V. :-) REVISION DETAIL https://reviews.freebsd.org/D9686 EMAIL PREFERENCES https://reviews.freebsd.org/settings/panel/emailpreferences/ To: decui_microsoft.com, imp, jhb, will, kib, delphij, emaste, sepherosa_gmail.com, honzhan_microsoft.com, howard0su_gmail.com, marcel Cc: freebsd-virtualization-list
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