Commit-ID: a0c01e4bb92d085462c293091a521cb9e7000371 Gitweb: https://git.kernel.org/tip/a0c01e4bb92d085462c293091a521cb9e7000371 Author: Jan Kiszka <[email protected]> AuthorDate: Mon, 27 Nov 2017 09:11:54 +0100 Committer: Thomas Gleixner <[email protected]> CommitDate: Sun, 14 Jan 2018 21:11:57 +0100
x86/jailhouse: Initialize PCI support With this change, PCI devices can be detected and used inside a non-root cell. Signed-off-by: Jan Kiszka <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Cc: [email protected] Link: https://lkml.kernel.org/r/e8d19494b96b68a749bcac514795d864ad9c28c3.1511770314.git.jan.kis...@siemens.com --- arch/x86/kernel/jailhouse.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/arch/x86/kernel/jailhouse.c b/arch/x86/kernel/jailhouse.c index 01d5b06..d6d5976 100644 --- a/arch/x86/kernel/jailhouse.c +++ b/arch/x86/kernel/jailhouse.c @@ -16,6 +16,7 @@ #include <asm/hypervisor.h> #include <asm/i8259.h> #include <asm/irqdomain.h> +#include <asm/pci_x86.h> #include <asm/reboot.h> #include <asm/setup.h> @@ -106,6 +107,19 @@ static void jailhouse_no_restart(void) machine_halt(); } +static int __init jailhouse_pci_arch_init(void) +{ + pci_direct_init(1); + + /* + * There are no bridges on the virtual PCI root bus under Jailhouse, + * thus no other way to discover all devices than a full scan. + */ + pcibios_last_bus = 0xff; + + return 0; +} + static void __init jailhouse_init_platform(void) { u64 pa_data = boot_params.hdr.setup_data; @@ -115,6 +129,7 @@ static void __init jailhouse_init_platform(void) x86_init.irqs.pre_vector_init = x86_init_noop; x86_init.timers.timer_init = jailhouse_timer_init; x86_init.mpparse.get_smp_config = jailhouse_get_smp_config; + x86_init.pci.arch_init = jailhouse_pci_arch_init; x86_platform.calibrate_cpu = jailhouse_get_tsc; x86_platform.calibrate_tsc = jailhouse_get_tsc; @@ -157,6 +172,8 @@ static void __init jailhouse_init_platform(void) precalibrated_tsc_khz = setup_data.tsc_khz; + pci_probe = 0; + /* * Avoid that the kernel complains about missing ACPI tables - there * are none in a non-root cell.
