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2018-05-19x86: Convert x86_platform_ops to timespec64Arnd Bergmann
The x86 platform operations are fairly isolated, so it's easy to change them from using timespec to timespec64. It has been checked that all the users and callers are safe, and there is only one critical function that is broken beyond 2106: pvclock_read_wallclock() uses a 32-bit number of seconds since the epoch to communicate the boot time between host and guest in a virtual environment. This will work until 2106, but fixing this is outside the scope of this change, Add a comment at least. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Acked-by: Radim Krčmář <rkrcmar@redhat.com> Acked-by: Jan Kiszka <jan.kiszka@siemens.com> Cc: Juergen Gross <jgross@suse.com> Cc: jailhouse-dev@googlegroups.com Cc: Borislav Petkov <bp@suse.de> Cc: kvm@vger.kernel.org Cc: y2038@lists.linaro.org Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com> Cc: xen-devel@lists.xenproject.org Cc: John Stultz <john.stultz@linaro.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Joao Martins <joao.m.martins@oracle.com> Link: https://lkml.kernel.org/r/20180427201435.3194219-1-arnd@arndb.de
2018-04-23x86/jailhouse: Fix incorrect SPDX identifierThomas Gleixner
GPL2.0 is not a valid SPDX identiier. Replace it with GPL-2.0. Fixes: 4a362601baa6 ("x86/jailhouse: Add infrastructure for running in non-root cell") Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Philippe Ombredanne <pombredanne@nexb.com> Link: https://lkml.kernel.org/r/20180422220832.815346488@linutronix.de
2018-03-08x86/jailhouse: Enable PCI mmconfig access in inmatesOtavio Pontes
Use the PCI mmconfig base address exported by jailhouse in boot parameters in order to access the memory mapped PCI configuration space. [Jan: rebased, fixed !CONFIG_PCI_MMCONFIG, used pcibios_last_bus] Signed-off-by: Otavio Pontes <otavio.pontes@intel.com> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Cc: jailhouse-dev@googlegroups.com Cc: linux-pci@vger.kernel.org Cc: virtualization@lists.linux-foundation.org Cc: Bjorn Helgaas <bhelgaas@google.com> Link: https://lkml.kernel.org/r/2ee9e4401fa22377b3965893a558120f169be82b.1520408357.git.jan.kiszka@siemens.com
2018-01-20x86/jailhouse: Respect pci=lastbus command line settingsJan Kiszka
Limiting the scan width to the known last bus via the command line can accelerate the boot noteworthy. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Jailhouse <jailhouse-dev@googlegroups.com> Link: https://lkml.kernel.org/r/51f5fe62-ca8f-9286-5cdb-39df3fad78b4@siemens.com
2018-01-20x86/jailhouse: Set X86_FEATURE_TSC_KNOWN_FREQJan Kiszka
Otherwise, Linux will not recognize precalibrated_tsc_khz and disable the tsc as clocksource. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Jailhouse <jailhouse-dev@googlegroups.com> Link: https://lkml.kernel.org/r/975fbfc9-2a64-cc56-40d5-164992ec3916@siemens.com
2018-01-15x86/jailhouse: Hide x2apic code when CONFIG_X86_X2APIC=nThomas Gleixner
x2apic_phys is not available when CONFIG_X86_X2APIC=n and the code is not optimized out resulting in a build fail: jailhouse.c: In function ‘jailhouse_get_smp_config’: jailhouse.c:73:3: error: ‘x2apic_phys’ undeclared (first use in this function) Fixes: 11c8dc419bbc ("x86/jailhouse: Enable APIC and SMP support") Reported-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: jailhouse-dev@googlegroups.com
2018-01-14x86/jailhouse: Initialize PCI supportJan Kiszka
With this change, PCI devices can be detected and used inside a non-root cell. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: jailhouse-dev@googlegroups.com Link: https://lkml.kernel.org/r/e8d19494b96b68a749bcac514795d864ad9c28c3.1511770314.git.jan.kiszka@siemens.com
2018-01-14x86/jailhouse: Wire up IOAPIC for legacy UART portsJan Kiszka
The typical I/O interrupts in non-root cells are MSI-based. However, the platform UARTs do not support MSI. In order to run a non-root cell that shall use one of them, the standard IOAPIC must be registered and 1:1 routing for IRQ 3 and 4 set up. If an IOAPIC is not available, the boot loader clears standard_ioapic in the setup data, so registration is skipped. If the guest is not allowed to to use one of those pins, Jailhouse will simply ignore the access. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: jailhouse-dev@googlegroups.com Link: https://lkml.kernel.org/r/90d942dda9d48a8046e00bb3c1bb6757c83227be.1511770314.git.jan.kiszka@siemens.com
2018-01-14x86/jailhouse: Halt instead of failing to restartJan Kiszka
Jailhouse provides no guest-initiated restart. So, do not even try to. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: jailhouse-dev@googlegroups.com Link: https://lkml.kernel.org/r/ef8a0ef95c2b17c21066e5f28ea56b58bf7eaa82.1511770314.git.jan.kiszka@siemens.com
2018-01-14x86/jailhouse: Silence ACPI warningJan Kiszka
Jailhouse support does not depend on ACPI, and does not even use it. But if it should be enabled, avoid warning about its absence in the platform. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: jailhouse-dev@googlegroups.com Link: https://lkml.kernel.org/r/939687007cbd7643b02fd330e8616e7e5944063f.1511770314.git.jan.kiszka@siemens.com
2018-01-14x86/jailhouse: Avoid access of unsupported platform resourcesJan Kiszka
Non-root cells do not have CMOS access, thus the warm reset cannot be enabled. There is no RTC, thus also no wall clock. Furthermore, there are no ISA IRQs and no PIC. Also disable probing of i8042 devices that are typically blocked for non-root cells. In theory, access could also be granted to a non-root cell, provided the root cell is not using the devices. But there is no concrete scenario in sight, and disabling probing over Jailhouse allows to build generic kernels that keep CONFIG_SERIO enabled for use in normal systems. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: jailhouse-dev@googlegroups.com Link: https://lkml.kernel.org/r/39b68cc2c496501c9d95e6f40e5d76e3053c3908.1511770314.git.jan.kiszka@siemens.com
2018-01-14x86/jailhouse: Set up timekeepingJan Kiszka
Get the precalibrated frequencies for the TSC and the APIC timer from the Jailhouse platform info and set the kernel values accordingly. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: jailhouse-dev@googlegroups.com Link: https://lkml.kernel.org/r/b2557426332fc337a74d3141cb920f7dce9ad601.1511770314.git.jan.kiszka@siemens.com
2018-01-14x86/jailhouse: Enable PMTIMERJan Kiszka
Jailhouse exposes the PMTIMER as only reference clock to all cells. Pick up its address from the setup data. Allow to enable the Linux support of it by relaxing its strict dependency on ACPI. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Cc: jailhouse-dev@googlegroups.com Link: https://lkml.kernel.org/r/6d5c3fadd801eb3fba9510e2d3db14a9c404a1a0.1511770314.git.jan.kiszka@siemens.com
2018-01-14x86/jailhouse: Enable APIC and SMP supportJan Kiszka
Register the APIC which Jailhouse always exposes at 0xfee00000 if in xAPIC mode or via MSRs as x2APIC. The latter is only available if it was already activated because there is no support for switching its mode during runtime. Jailhouse requires the APIC to be operated in phys-flat mode. Ensure that this mode is selected by Linux. The available CPUs are taken from the setup data structure that the loader filled and registered with the kernel. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: jailhouse-dev@googlegroups.com Link: https://lkml.kernel.org/r/8b2255da0a9856c530293a67aa9d6addfe102a2b.1511770314.git.jan.kiszka@siemens.com
2018-01-14x86/jailhouse: Add infrastructure for running in non-root cellJan Kiszka
The Jailhouse hypervisor is able to statically partition a multicore system into multiple so-called cells. Linux is used as boot loader and continues to run in the root cell after Jailhouse is enabled. Linux can also run in non-root cells. Jailhouse does not emulate usual x86 devices. It also provides no complex ACPI but basic platform information that the boot loader forwards via setup data. This adds the infrastructure to detect when running in a non-root cell so that the platform can be configured as required in succeeding steps. Support is limited to x86-64 so far, primarily because no boot loader stub exists for i386 and, thus, we wouldn't be able to test the 32-bit path. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: jailhouse-dev@googlegroups.com Link: https://lkml.kernel.org/r/7f823d077b38b1a70c526b40b403f85688c137d3.1511770314.git.jan.kiszka@siemens.com
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