| Message ID | 1548172784-27414-7-git-send-email-linuxram@us.ibm.com |
|---|---|
| State | Changes Requested |
| Headers | show |
| Series | KVM: PPC: Paravirtualize KVM to support Ultravisor | expand |
diff --git a/arch/powerpc/include/asm/ucall-api.h b/arch/powerpc/include/asm/ucall-api.h index f411dcb..7723b4e 100644 --- a/arch/powerpc/include/asm/ucall-api.h +++ b/arch/powerpc/include/asm/ucall-api.h @@ -31,5 +31,11 @@ static inline int uv_register_pate(u64 lpid, u64 dw0, u64 dw1) return plpar_ucall(UV_WRITE_PATE, retbuf, lpid, dw0, dw1); } +static inline int uv_restricted_spr_write(u64 reg, u64 val) +{ + unsigned long retbuf[PLPAR_UCALL_BUFSIZE]; + + return plpar_ucall(UV_RESTRICTED_SPR_WRITE, retbuf, reg, val); +} #endif /* __ASSEMBLY__ */ #endif /* _ASM_POWERPC_UCALL_API_H */ diff --git a/arch/powerpc/include/uapi/asm/uapi_uvcall.h b/arch/powerpc/include/uapi/asm/uapi_uvcall.h index 7f018cf..d76dd1f 100644 --- a/arch/powerpc/include/uapi/asm/uapi_uvcall.h +++ b/arch/powerpc/include/uapi/asm/uapi_uvcall.h @@ -9,4 +9,5 @@ #define UAPI_UC_H #define UV_WRITE_PATE 0xf104 +#define UV_RESTRICTED_SPR_WRITE 0xf108 #endif /* #ifndef UAPI_UC_H */
Introduce UV_RESTRICTED_SPR_WRITE. Hypervisor loses access to some registers when Ultravisor is enabled. Hypervisor can request write access to those registers using UV_RESTRICTED_SPR_WRITE ucall. Signed-off-by: Ram Pai <linuxram@us.ibm.com> --- arch/powerpc/include/asm/ucall-api.h | 6 ++++++ arch/powerpc/include/uapi/asm/uapi_uvcall.h | 1 + 2 files changed, 7 insertions(+)