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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Ultravisor definitions
*
* Copyright 2019, IBM Corporation.
*
*/
#ifndef _ASM_POWERPC_ULTRAVISOR_H
#define _ASM_POWERPC_ULTRAVISOR_H
#include <asm/asm-prototypes.h>
#include <asm/ultravisor-api.h>
#include <asm/firmware.h>
int early_init_dt_scan_ultravisor(unsigned long node, const char *uname,
int depth, void *data);
/*
* In ultravisor enabled systems, PTCR becomes ultravisor privileged only for
* writing and an attempt to write to it will cause a Hypervisor Emulation
* Assistance interrupt.
*/
static inline void set_ptcr_when_no_uv(u64 val)
{
if (!firmware_has_feature(FW_FEATURE_ULTRAVISOR))
mtspr(SPRN_PTCR, val);
}
static inline int uv_register_pate(u64 lpid, u64 dw0, u64 dw1)
{
return ucall_norets(UV_WRITE_PATE, lpid, dw0, dw1);
}
static inline int uv_share_page(u64 pfn, u64 npages)
{
return ucall_norets(UV_SHARE_PAGE, pfn, npages);
}
static inline int uv_unshare_page(u64 pfn, u64 npages)
{
return ucall_norets(UV_UNSHARE_PAGE, pfn, npages);
}
static inline int uv_unshare_all_pages(void)
{
return ucall_norets(UV_UNSHARE_ALL_PAGES);
}
#endif /* _ASM_POWERPC_ULTRAVISOR_H */
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