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Commit 14c1bf8a authored by K. Y. Srinivasan's avatar K. Y. Srinivasan Committed by Greg Kroah-Hartman
Browse files

drivers: hv: Increase the number of VCPUs supported in the guest 



The current code arbirarily limited the number of CPUs the guest could have.
Change that so that we can support the maximum number of CPUs the guest can
support. While we use NR_CPUS to size the per-cpu state all we are allocating
based on NR_CPUS are the  pointers to per-cpu state that will be allocatted in
the context of the initializing CPU. This patch triggers a checkpatch warning
for the usage of NR_CPU and since all we are allocating a couple of pointers
per CPU, it should be ok.

Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 26403354

drivers/hv/hv.c

+2 −2
Original line number Diff line number Diff line
@@ -155,9 +155,9 @@ int hv_init(void) 
	union hv_x64_msr_hypercall_contents hypercall_msr;

	void *virtaddr = NULL;



	memset(hv_context.synic_event_page, 0, sizeof(void *) * MAX_NUM_CPUS);

	memset(hv_context.synic_event_page, 0, sizeof(void *) * NR_CPUS);

	memset(hv_context.synic_message_page, 0,

	       sizeof(void *) * MAX_NUM_CPUS);

	       sizeof(void *) * NR_CPUS);



	if (!query_hypervisor_presence())

		goto cleanup;

drivers/hv/hyperv_vmbus.h

+2 −3
Original line number Diff line number Diff line
@@ -457,7 +457,6 @@ static const uuid_le VMBUS_SERVICE_ID = { 
	},

};



#define MAX_NUM_CPUS	32





struct hv_input_signal_event_buffer {
@@ -483,8 +482,8 @@ struct hv_context { 
	/* 8-bytes aligned of the buffer above */

	struct hv_input_signal_event *signal_event_param;



	void *synic_message_page[MAX_NUM_CPUS];

	void *synic_event_page[MAX_NUM_CPUS];

	void *synic_message_page[NR_CPUS];

	void *synic_event_page[NR_CPUS];

};



extern struct hv_context hv_context;