diff options
| author | Jan Kiszka <jan.kiszka@siemens.com> | 2017-11-27 09:11:44 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-01-14 21:11:53 +0100 |
| commit | e348caef8b4a161cc27bec8f7500b7e100370ef1 (patch) | |
| tree | 7984f414a27c8c1a5206476ba08bbb6197134108 | |
| parent | 32c9c801a853f181448ed4e8730168c556f9e05a (diff) | |
x86/platform: Control warm reset setup via legacy feature flag
Allow to turn off the setup of BIOS-managed warm reset via a new flag in
x86_legacy_features. Besides the UV1, the upcoming jailhose guest support
needs this switched off.
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/44376558129d70a2c1527959811371ef4b82e829.1511770314.git.jan.kiszka@siemens.com
| -rw-r--r-- | arch/x86/include/asm/x86_init.h | 1 | ||||
| -rw-r--r-- | arch/x86/kernel/apic/x2apic_uv_x.c | 1 | ||||
| -rw-r--r-- | arch/x86/kernel/platform-quirks.c | 1 | ||||
| -rw-r--r-- | arch/x86/kernel/smpboot.c | 4 |
4 files changed, 5 insertions, 2 deletions
diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h index aa4747569e23..fc2f082ac635 100644 --- a/arch/x86/include/asm/x86_init.h +++ b/arch/x86/include/asm/x86_init.h @@ -212,6 +212,7 @@ enum x86_legacy_i8042_state { struct x86_legacy_features { enum x86_legacy_i8042_state i8042; int rtc; + int warm_reset; int no_vga; int reserve_bios_regions; struct x86_legacy_devices devices; diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c index e1b8e8bf6b3c..6de35fc8fb3a 100644 --- a/arch/x86/kernel/apic/x2apic_uv_x.c +++ b/arch/x86/kernel/apic/x2apic_uv_x.c @@ -316,6 +316,7 @@ static int __init uv_acpi_madt_oem_check(char *oem_id, char *oem_table_id) } else if (!strcmp(oem_table_id, "UVH")) { /* Only UV1 systems: */ uv_system_type = UV_NON_UNIQUE_APIC; + x86_platform.legacy.warm_reset = 0; __this_cpu_write(x2apic_extra_bits, pnodeid << uvh_apicid.s.pnode_shift); uv_set_apicid_hibit(); uv_apic = 1; diff --git a/arch/x86/kernel/platform-quirks.c b/arch/x86/kernel/platform-quirks.c index 39a59299bfa0..235fe6008ac8 100644 --- a/arch/x86/kernel/platform-quirks.c +++ b/arch/x86/kernel/platform-quirks.c @@ -9,6 +9,7 @@ void __init x86_early_init_platform_quirks(void) { x86_platform.legacy.i8042 = X86_LEGACY_I8042_EXPECTED_PRESENT; x86_platform.legacy.rtc = 1; + x86_platform.legacy.warm_reset = 1; x86_platform.legacy.reserve_bios_regions = 0; x86_platform.legacy.devices.pnpbios = 1; diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index ed556d50d7ed..9adcae1b135c 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -934,7 +934,7 @@ static int do_boot_cpu(int apicid, int cpu, struct task_struct *idle, * the targeted processor. */ - if (get_uv_system_type() != UV_NON_UNIQUE_APIC) { + if (x86_platform.legacy.warm_reset) { pr_debug("Setting warm reset code and vector.\n"); @@ -1006,7 +1006,7 @@ static int do_boot_cpu(int apicid, int cpu, struct task_struct *idle, /* mark "stuck" area as not stuck */ *trampoline_status = 0; - if (get_uv_system_type() != UV_NON_UNIQUE_APIC) { + if (x86_platform.legacy.warm_reset) { /* * Cleanup possible dangling ends... */ |