x86: paravirt_ops: don't steal memory resources in paravirt_disable_iospace (f7743fe6) · Commits · 戴 / test

The memory resource is also used for main memory, and we need it to allocate physical addresses for memory hotplug. Knobbling io space is enough to get the job done anyway. Signed-off-by:

Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by:

Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/paravirt.c

+1 −17

Original line number	Diff line number	Diff line
		@@ -206,13 +206,6 @@ static struct resource reserve_ioports = {
		.flags = IORESOURCE_IO \| IORESOURCE_BUSY,
		};

		static struct resource reserve_iomem = {
		.start = 0,
		.end = -1,
		.name = "paravirt-iomem",
		.flags = IORESOURCE_MEM \| IORESOURCE_BUSY,
		};

		/*
		* Reserve the whole legacy IO space to prevent any legacy drivers
		* from wasting time probing for their hardware. This is a fairly
		@@ -222,16 +215,7 @@ static struct resource reserve_iomem = {
		*/
		int paravirt_disable_iospace(void)
		{
		int ret;

		ret = request_resource(&ioport_resource, &reserve_ioports);
		if (ret == 0) {
		ret = request_resource(&iomem_resource, &reserve_iomem);
		if (ret)
		release_resource(&reserve_ioports);
		}

		return ret;
		return request_resource(&ioport_resource, &reserve_ioports);
		}

		static DEFINE_PER_CPU(enum paravirt_lazy_mode, paravirt_lazy_mode) = PARAVIRT_LAZY_NONE;

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