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KVM: Add coalesced MMIO support (x86 part) 

This patch enables coalesced MMIO for x86 architecture.
It defines KVM_MMIO_PAGE_OFFSET and KVM_CAP_COALESCED_MMIO.
It enables the compilation of coalesced_mmio.c.

Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Laurent Vivier 2008-05-30 16:05:55 +02:00 committed by Avi Kivity
parent 5f94c1741b
commit 542472b53e
3 changed files with 6 additions and 1 deletions
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3
arch/x86/kvm/Makefile
View File

@ -2,7 +2,8 @@
# Makefile for Kernel-based Virtual Machine module
#
common-objs = $(addprefix ../../../virt/kvm/, kvm_main.o ioapic.o)
common-objs = $(addprefix ../../../virt/kvm/, kvm_main.o ioapic.o \
coalesced_mmio.o)
ifeq ($(CONFIG_KVM_TRACE),y)
common-objs += $(addprefix ../../../virt/kvm/, kvm_trace.o)
endif

3
arch/x86/kvm/x86.c
View File

@ -885,6 +885,9 @@ int kvm_dev_ioctl_check_extension(long ext)
case KVM_CAP_MP_STATE:
r = 1;
break;
case KVM_CAP_COALESCED_MMIO:
r = KVM_COALESCED_MMIO_PAGE_OFFSET;
break;
case KVM_CAP_VAPIC:
r = !kvm_x86_ops->cpu_has_accelerated_tpr();
break;

1
include/asm-x86/kvm_host.h
View File

@ -27,6 +27,7 @@
#define KVM_PRIVATE_MEM_SLOTS 4
#define KVM_PIO_PAGE_OFFSET 1
#define KVM_COALESCED_MMIO_PAGE_OFFSET 2
#define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1)
#define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD))