From 8cd91acec8dfea6065272ca828405333f564a612 Mon Sep 17 00:00:00 2001 From: Haozhong Zhang Date: Fri, 22 Dec 2017 09:51:20 +0800 Subject: [PATCH] pc: fail memory hot-plug/unplug with -no-acpi and Q35 machine type When -no-acpi option is used with Q35 machine type, no guest ACPI is built, but the ACPI device is still created, so only checking the presence of ACPI device before memory plug/unplug is not enough in such cases. Check whether ACPI is disabled globally in addition and fail memory plug/unplug if it's disabled. Signed-off-by: Haozhong Zhang Message-Id: <20171222015120.31730-1-haozhong.zhang@intel.com> Reviewed-by: Igor Mammedov Signed-off-by: Paolo Bonzini --- hw/i386/pc.c | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-) diff --git a/hw/i386/pc.c b/hw/i386/pc.c index 3fcf318a95..55686bf5d8 100644 --- a/hw/i386/pc.c +++ b/hw/i386/pc.c @@ -1695,9 +1695,14 @@ static void pc_dimm_plug(HotplugHandler *hotplug_dev, align = memory_region_get_alignment(mr); } - if (!pcms->acpi_dev) { + /* + * When -no-acpi is used with Q35 machine type, no ACPI is built, + * but pcms->acpi_dev is still created. Check !acpi_enabled in + * addition to cover this case. + */ + if (!pcms->acpi_dev || !acpi_enabled) { error_setg(&local_err, - "memory hotplug is not enabled: missing acpi device"); + "memory hotplug is not enabled: missing acpi device or acpi disabled"); goto out; } @@ -1729,9 +1734,14 @@ static void pc_dimm_unplug_request(HotplugHandler *hotplug_dev, Error *local_err = NULL; PCMachineState *pcms = PC_MACHINE(hotplug_dev); - if (!pcms->acpi_dev) { + /* + * When -no-acpi is used with Q35 machine type, no ACPI is built, + * but pcms->acpi_dev is still created. Check !acpi_enabled in + * addition to cover this case. + */ + if (!pcms->acpi_dev || !acpi_enabled) { error_setg(&local_err, - "memory hotplug is not enabled: missing acpi device"); + "memory hotplug is not enabled: missing acpi device or acpi disabled"); goto out; }