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From: "Gerd Hoffmann" <kraxel@redhat.com>
To: Laszlo Ersek <lersek@redhat.com>
Cc: Michael Brown <mcb30@ipxe.org>, devel@edk2.groups.io
Subject: Re: [PATCH 2/2] OvmfPkg: Relax assertion that interrupts do not occur at TPL_HIGH_LEVEL
Date: Tue, 9 May 2023 11:42:15 +0200	[thread overview]
Message-ID: <a7ywfgacfjandirss5dmgq33kr4h7uz4giuhafm4c5bslgbfub@rpnzxk7dv3ng> (raw)
In-Reply-To: <d7c6dee6-fb05-559b-e4ba-a3f5af0951ea@redhat.com>

  Hi,

> Here's why: I'd been used to Microsoft *not* cooperating usefully in
> Windows-on-QEMU/KVM situations. But this instance was totally different.
> In fact I'm still a bit shocked, in the positive sense. We got a fast
> and helpful, to-the-point response. It's a first, considering my own
> experience, and it has strongly changed my impression of Microsoft's
> Windows team. I'd like us to acknowledge that in the commit message, if
> possible.

And Microsoft saying this is tsc calibration code also gives us a
workaround: When using 'qemu -cpu host,hv-frequencies=on' the windows
installer iso boots just fine, most likely because cdboot.efi queries
the hypervisor for the tsc frequency instead of running the calibration
loop.

take care,
  Gerd


  reply	other threads:[~2023-05-09  9:42 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-05-03  7:19 [PATCH v2 1/1] OvmfPkg/NestedInterruptTplLib: replace ASSERT() with a warning logged Gerd Hoffmann
2023-05-05 14:10 ` [edk2-devel] " Michael Brown
2023-05-05 18:56   ` Laszlo Ersek
2023-05-05 23:27     ` Michael Brown
2023-05-05 23:57       ` Ard Biesheuvel
2023-05-08  6:45         ` Laszlo Ersek
2023-05-09  9:13           ` Ard Biesheuvel
2023-05-08  6:38       ` Laszlo Ersek
2023-05-08 21:31         ` [PATCH 0/2] OvmfPkg: Relax assertion that interrupts do not occur at TPL_HIGH_LEVEL Michael Brown
2023-05-09  7:05           ` Gerd Hoffmann
2023-05-09  8:43           ` Laszlo Ersek
2023-05-09 12:08             ` [edk2-devel] " Michael Brown
2023-05-09 13:27               ` Laszlo Ersek
     [not found]         ` <20230508213100.3949708-1-mcb30@ipxe.org>
2023-05-08 21:31           ` [PATCH 1/2] OvmfPkg: Clarify invariants for NestedInterruptTplLib Michael Brown
2023-05-08 21:31           ` [PATCH 2/2] OvmfPkg: Relax assertion that interrupts do not occur at TPL_HIGH_LEVEL Michael Brown
2023-05-09  8:35             ` Laszlo Ersek
2023-05-09  9:42               ` Gerd Hoffmann [this message]
2023-05-09 12:04               ` [edk2-devel] " Michael Brown

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