From: Jan Kiszka <[email protected]> With this change, PCI devices can be detected and used inside a non-root cell.
Signed-off-by: Jan Kiszka <[email protected]> --- 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 8ff21e1534de..70b857d4b1f5 100644 --- a/arch/x86/kernel/jailhouse.c +++ b/arch/x86/kernel/jailhouse.c @@ -18,6 +18,7 @@ #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> @@ -108,6 +109,19 @@ 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; @@ -117,6 +131,7 @@ 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; @@ -159,6 +174,8 @@ 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. -- 2.12.3
