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Smith" Subject: Re: Assertion '!is_idle_vcpu(v)' failed after 'Remove fully_eager_fpu' commit on EFI Message-ID: References: <1781272430.8631fc262581453bbf619ec5b2062170.19ebc1c488b000701b@vates.tech> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="qUR8gW28j25bAxkM" Content-Disposition: inline In-Reply-To: <1781272430.8631fc262581453bbf619ec5b2062170.19ebc1c488b000701b@vates.tech> X-purgate-ID: tlsNG-ebf023/1781273494-28F753FF-6DCADA5A/0/0 X-purgate-type: clean X-purgate-size: 2907 --qUR8gW28j25bAxkM Content-Type: text/plain; protected-headers=v1; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Date: Fri, 12 Jun 2026 16:11:28 +0200 From: Marek =?utf-8?Q?Marczykowski-G=C3=B3recki?= To: Anthony PERARD Cc: xen-devel@lists.xenproject.org, Ross Lagerwall , Jan Beulich , Andrew Cooper , Roger Pau =?utf-8?B?TW9ubsOp?= , "Daniel P. Smith" Subject: Re: Assertion '!is_idle_vcpu(v)' failed after 'Remove fully_eager_fpu' commit on EFI On Fri, Jun 12, 2026 at 03:53:49PM +0200, Anthony PERARD wrote: > Hi, >=20 > Since commit dba44e051209 ("x86: Remove fully_eager_fpu"), I can't boot > a machine and get assertion '!is_idle_vcpu(v)' failed instead. It's > netbooted and EFI. >=20 > Xen call trace: > [] R vcpu_save_fpu+0x65/0xdc > [] S efi_rs_enter+0x37/0x16a > [] F efi_get_time+0x19/0xb2 > [] F init_xen_time+0x1e3/0x2b4 > [] F __start_xen+0x1d71/0x24b8 > [] F __high_start+0xb7/0xc0 >=20 > Assertion '!is_idle_vcpu(v)' failed at arch/x86/i387.c:195 >=20 > A few more lines from Xen: > CPU Vendor: Intel, Family 6 (0x6), Model 86 (0x56), Stepping 3 (raw 0= 0050663) > Bootloader: GRUB 2.06 > [...] > Enabling APIC mode. Using 2 I/O APICs > ENABLING IO-APIC IRQs > -> Using old ACK method > ..TIMER: vector=3D0xF0 apic1=3D0 pin1=3D2 apic2=3D-1 pin2=3D-1 > TSC deadline timer enabled > Assertion '!is_idle_vcpu(v)' failed at arch/x86/i387.c:195 >=20 > Commit this Xen is built from: 50936ea05660. Interesting, the efi_get_time() way is nowadays a fallback if cmos one isn't advertised. Can you try adding `cmos-rtc-probe`? Anyway, surely it shouldn't crash... The commit you mentioned has "No functional change intended", but well... > full logs at: > https://paste.vates.tech/?bd8a9a0955798a97#A1DU2efwUt7bbHQUxdo9UXGcsJ= 2XPNJNZHPz87LqLtcF --=20 Best Regards, Marek Marczykowski-G=C3=B3recki Invisible Things Lab --qUR8gW28j25bAxkM Content-Type: application/pgp-signature; name=signature.asc -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEhrpukzGPukRmQqkK24/THMrX1ywFAmosE5AACgkQ24/THMrX 1ywrVgf/fv+h2l6T2FsC3xZhUccitKvcZcuGLKL9NW20PeahUhmzoBvwZ9dj5CSU k/mYZsWQaw/MTcpphuGpdf4IagVmz8rE8cyb9OBIu/65hxAh9oUH3/e8QqsGIFdc Te4ZLruD3K9S4N8KfB1ZFGsK5I1aXQCDt/8DKro7+cpQIcJ3AhwtU7ZB5q0R0DFN tgGvA3Xe05YVREv48lZh9U3becL7Oq0vC14sAqJkeJFyb5RYO4LDEEJFttSNO4NJ h+4mdPvyxcVjEwSxWcQbV0hFh7qQgoNmrrqw0oJHJkE/ggDErZ+2MVWxVEXKakHP 0fjJKS/6Yw1KH22SOGsM1q3KUv2Rog== =Xoe4 -----END PGP SIGNATURE----- --qUR8gW28j25bAxkM--