[RFC PATCH 26/36] arm64: ptrace: Add PSR_ALLINT_BIT

[Vladimir Murzin]

From: Ada Couprie Diaz <ada.coupriediaz at arm.com>

When FEAT_NMI is implemented, ALLINT is part of PSTATE and will be saved
to SPSR on exception entry.
As it can mask interrupts, depending on configuration, we will need to
check its value in interruted tasks, so add the corresponding bit
to ptrace.h.

Given its impact on interrupt and NMI masking, use it to update
`print_pstate()` so that it displays ALLINT state.
Display it after DAIF so that interrupt masking fields are together.

Signed-off-by: Ada Couprie Diaz <ada.coupriediaz at arm.com>
Signed-off-by: Vladimir Murzin <vladimir.murzin at arm.com>
---
 arch/arm64/include/uapi/asm/ptrace.h | 1 +
 arch/arm64/kernel/process.c          | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/include/uapi/asm/ptrace.h b/arch/arm64/include/uapi/asm/ptrace.h
index 6fed93fb2536..99352dd823cc 100644
--- a/arch/arm64/include/uapi/asm/ptrace.h
+++ b/arch/arm64/include/uapi/asm/ptrace.h
@@ -48,6 +48,7 @@
 #define PSR_D_BIT	0x00000200
 #define PSR_BTYPE_MASK	0x00000c00
 #define PSR_SSBS_BIT	0x00001000
+#define PSR_ALLINT_BIT	0x00002000
 #define PSR_PAN_BIT	0x00400000
 #define PSR_UAO_BIT	0x00800000
 #define PSR_DIT_BIT	0x01000000
diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
index ddda8d7aee24..8d4ceef4f67f 100644
--- a/arch/arm64/kernel/process.c
+++ b/arch/arm64/kernel/process.c
@@ -183,7 +183,7 @@ static void print_pstate(struct pt_regs *regs)
 		const char *btype_str = btypes[(pstate & PSR_BTYPE_MASK) >>
 					       PSR_BTYPE_SHIFT];
 
-		printk("pstate: %08llx (%c%c%c%c %c%c%c%c %cPAN %cUAO %cTCO %cDIT %cSSBS BTYPE=%s)\n",
+		printk("pstate: %08llx (%c%c%c%c %c%c%c%c %cALLINT %cPAN %cUAO %cTCO %cDIT %cSSBS BTYPE=%s)\n",
 			pstate,
 			pstate & PSR_N_BIT ? 'N' : 'n',
 			pstate & PSR_Z_BIT ? 'Z' : 'z',
@@ -193,6 +193,7 @@ static void print_pstate(struct pt_regs *regs)
 			pstate & PSR_A_BIT ? 'A' : 'a',
 			pstate & PSR_I_BIT ? 'I' : 'i',
 			pstate & PSR_F_BIT ? 'F' : 'f',
+			pstate & PSR_ALLINT_BIT ? '+' : '-',
 			pstate & PSR_PAN_BIT ? '+' : '-',
 			pstate & PSR_UAO_BIT ? '+' : '-',
 			pstate & PSR_TCO_BIT ? '+' : '-',
-- 
2.34.1