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59d21e537b
When using xen_enabled() we're currently only checking if xen is enabled at all during the build. But what if you want to build multiple targets out of which only one can potentially run xen code? That means that for generic code we'll still have to fall back to the variable and potentially slow the code down, but it's not as important as that is mostly xen device emulation which is not touched for non-xen targets. The target specific code however can with this patch see that it's unable to ever execute xen code. We can thus always return 0 on xen_enabled(), giving gcc enough hints to evict the mapcache code from the target memory management code. Signed-off-by: Alexander Graf <agraf@suse.de> Acked-by: Anthony PERARD <anthony.perard@citrix.com>
54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
#ifndef QEMU_HW_XEN_H
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#define QEMU_HW_XEN_H 1
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/*
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* public xen header
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* stuff needed outside xen-*.c, i.e. interfaces to qemu.
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* must not depend on any xen headers being present in
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* /usr/include/xen, so it can be included unconditionally.
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*/
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#include <inttypes.h>
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#include "qemu-common.h"
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/* xen-machine.c */
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enum xen_mode {
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XEN_EMULATE = 0, // xen emulation, using xenner (default)
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XEN_CREATE, // create xen domain
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XEN_ATTACH // attach to xen domain created by xend
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};
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extern uint32_t xen_domid;
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extern enum xen_mode xen_mode;
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extern int xen_allowed;
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static inline int xen_enabled(void)
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{
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#if defined(CONFIG_XEN_BACKEND) && !defined(CONFIG_NO_XEN)
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return xen_allowed;
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#else
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return 0;
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#endif
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}
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int xen_pci_slot_get_pirq(PCIDevice *pci_dev, int irq_num);
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void xen_piix3_set_irq(void *opaque, int irq_num, int level);
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void xen_piix_pci_write_config_client(uint32_t address, uint32_t val, int len);
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void xen_cmos_set_s3_resume(void *opaque, int irq, int level);
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qemu_irq *xen_interrupt_controller_init(void);
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int xen_init(void);
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int xen_hvm_init(void);
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void xen_vcpu_init(void);
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void xenstore_store_pv_console_info(int i, struct CharDriverState *chr);
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#if defined(NEED_CPU_H) && !defined(CONFIG_USER_ONLY)
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void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size);
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#endif
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#if defined(CONFIG_XEN) && CONFIG_XEN_CTRL_INTERFACE_VERSION < 400
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# define HVM_MAX_VCPUS 32
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#endif
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#endif /* QEMU_HW_XEN_H */
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