linux-kernel - [RFC V1 4/6] powerpc: Add flag in paca for register restore state

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Message-ID: <20250428152225.66044-7-mchauras@linux.ibm.com>
Date: Mon, 28 Apr 2025 20:52:25 +0530
From: Mukesh Kumar Chaurasiya <mchauras@...ux.ibm.com>
To: linux-kernel@...r.kernel.org
Cc: maddy@...ux.ibm.com, mpe@...erman.id.au, npiggin@...il.com,
        christophe.leroy@...roup.eu, naveen@...nel.org,
        neeraj.upadhyay@...nel.org, vschneid@...hat.com, tglx@...utronix.de,
        frederic@...nel.org, ankur.a.arora@...cle.com, sshegde@...ux.ibm.com,
        bigeasy@...utronix.de, kees@...nel.org, oleg@...hat.com,
        peterz@...radead.org, tzimmermann@...e.de, namcao@...utronix.de,
        kan.liang@...ux.intel.com, mcgrof@...nel.org, rppt@...nel.org,
        atrajeev@...ux.vnet.ibm.com, anjalik@...ux.ibm.com,
        coltonlewis@...gle.com, linuxppc-dev@...ts.ozlabs.org,
        Mukesh Kumar Chaurasiya <mchauras@...ux.ibm.com>
Subject: [RFC V1 4/6] powerpc: Add flag in paca for register restore state

In case of signal being processed we want to restore the GPRS. To save the state
of whether we need to restore the registers or not a flag is introduced so that
we can save the state for that cpu in case we want to save the register state.

Signed-off-by: Mukesh Kumar Chaurasiya <mchauras@...ux.ibm.com>
---
 arch/powerpc/include/asm/paca.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/include/asm/paca.h b/arch/powerpc/include/asm/paca.h
index 1d58da9467396..215cafd64d8f5 100644
--- a/arch/powerpc/include/asm/paca.h
+++ b/arch/powerpc/include/asm/paca.h
@@ -174,6 +174,7 @@ struct paca_struct {
 	u8 irq_soft_mask;		/* mask for irq soft masking */
 	u8 irq_happened;		/* irq happened while soft-disabled */
 	u8 irq_work_pending;		/* IRQ_WORK interrupt while soft-disable */
+	u8 generic_fw_flags;		/* Flags for generic framework */
 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 	u8 pmcregs_in_use;		/* pseries puts this in lppaca */
 #endif
-- 
2.49.0