From 1e6107d901ca3cb31ee3dbf3d55b1778682f0979 Mon Sep 17 00:00:00 2001 From: Igor Mammedov Date: Mon, 7 Dec 2020 09:07:33 -0500 Subject: acpi: cpuhp: introduce 'firmware performs eject' status/control bits Adds bit #4 to status/control field of CPU hotplug MMIO interface. New bit will be used OSPM to mark CPUs as pending for removal by firmware, when it calls _EJ0 method on CPU device node. Later on, when firmware sees this bit set, it will perform CPU eject which will clear bit #4 as well. Signed-off-by: Igor Mammedov Message-Id: <20201207140739.3829993-3-imammedo@redhat.com> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/acpi/cpu.c | 12 +++++++++++- hw/acpi/trace-events | 2 ++ 2 files changed, 13 insertions(+), 1 deletion(-) (limited to 'hw/acpi') diff --git a/hw/acpi/cpu.c b/hw/acpi/cpu.c index f099b50927..1293204438 100644 --- a/hw/acpi/cpu.c +++ b/hw/acpi/cpu.c @@ -71,6 +71,7 @@ static uint64_t cpu_hotplug_rd(void *opaque, hwaddr addr, unsigned size) val |= cdev->cpu ? 1 : 0; val |= cdev->is_inserting ? 2 : 0; val |= cdev->is_removing ? 4 : 0; + val |= cdev->fw_remove ? 16 : 0; trace_cpuhp_acpi_read_flags(cpu_st->selector, val); break; case ACPI_CPU_CMD_DATA_OFFSET_RW: @@ -148,6 +149,14 @@ static void cpu_hotplug_wr(void *opaque, hwaddr addr, uint64_t data, hotplug_ctrl = qdev_get_hotplug_handler(dev); hotplug_handler_unplug(hotplug_ctrl, dev, NULL); object_unparent(OBJECT(dev)); + cdev->fw_remove = false; + } else if (data & 16) { + if (!cdev->cpu || cdev->cpu == first_cpu) { + trace_cpuhp_acpi_fw_remove_invalid_cpu(cpu_st->selector); + break; + } + trace_cpuhp_acpi_fw_remove_cpu(cpu_st->selector); + cdev->fw_remove = true; } break; case ACPI_CPU_CMD_OFFSET_WR: @@ -159,7 +168,8 @@ static void cpu_hotplug_wr(void *opaque, hwaddr addr, uint64_t data, do { cdev = &cpu_st->devs[iter]; - if (cdev->is_inserting || cdev->is_removing) { + if (cdev->is_inserting || cdev->is_removing || + cdev->fw_remove) { cpu_st->selector = iter; trace_cpuhp_acpi_cpu_has_events(cpu_st->selector, cdev->is_inserting, cdev->is_removing); diff --git a/hw/acpi/trace-events b/hw/acpi/trace-events index afbc77de1c..f91ced477d 100644 --- a/hw/acpi/trace-events +++ b/hw/acpi/trace-events @@ -29,6 +29,8 @@ cpuhp_acpi_clear_inserting_evt(uint32_t idx) "idx[0x%"PRIx32"]" cpuhp_acpi_clear_remove_evt(uint32_t idx) "idx[0x%"PRIx32"]" cpuhp_acpi_ejecting_invalid_cpu(uint32_t idx) "0x%"PRIx32 cpuhp_acpi_ejecting_cpu(uint32_t idx) "0x%"PRIx32 +cpuhp_acpi_fw_remove_invalid_cpu(uint32_t idx) "0x%"PRIx32 +cpuhp_acpi_fw_remove_cpu(uint32_t idx) "0x%"PRIx32 cpuhp_acpi_write_ost_ev(uint32_t slot, uint32_t ev) "idx[0x%"PRIx32"] OST EVENT: 0x%"PRIx32 cpuhp_acpi_write_ost_status(uint32_t slot, uint32_t st) "idx[0x%"PRIx32"] OST STATUS: 0x%"PRIx32 -- cgit v1.2.3-55-g7522