Commit 650701e4 authored by Kevin Brodsky's avatar Kevin Brodsky Committed by Catalin Marinas
Browse files

arm64/sysreg: Move POR_EL0_INIT to asm/por.h 



The value of POR_EL0_INIT is not architectural, it is a software
decision. Since we have a dedicated header for POR_ELx, we might as
well define POR_EL0_INIT there.

While at it also define POR_EL0_INIT using POR_ELx_PERM_PREP(),
making it clearer that we are setting permissions for POIndex/pkey
0.

Signed-off-by: default avatarKevin Brodsky <kevin.brodsky@arm.com>
Link: https://lore.kernel.org/r/20250219164029.2309119-4-kevin.brodsky@arm.com


Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent 83d78bbf

arch/arm64/include/asm/por.h

+2 −0
Original line number Diff line number Diff line
@@ -8,6 +8,8 @@ 


#include <asm/sysreg.h>



#define POR_EL0_INIT	POR_ELx_PERM_PREP(0, POE_RWX)



static inline bool por_elx_allows_read(u64 por, u8 pkey)

{

	u8 perm = POR_ELx_PERM_GET(pkey, por);

arch/arm64/include/asm/sysreg.h

+0 −3
Original line number Diff line number Diff line
@@ -1086,9 +1086,6 @@ 
#define POR_ELx_PERM_GET(idx, reg)	(((reg) >> POR_ELx_PERM_SHIFT(idx)) & POE_MASK)

#define POR_ELx_PERM_PREP(idx, perm)	(((perm) & POE_MASK) << POR_ELx_PERM_SHIFT(idx))



/* Initial value for Permission Overlay Extension for EL0 */

#define POR_EL0_INIT	POE_RWX



/*

 * Definitions for Guarded Control Stack

 */