linux-kernel - [PATCH 08/11] KVM: arm64: initialise SCTLR2_EL1 at __kvm_host_psci_cpu

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Message-Id: <20250804121724.3681531-9-yeoreum.yun@arm.com>
Date: Mon,  4 Aug 2025 13:17:21 +0100
From: Yeoreum Yun <yeoreum.yun@....com>
To: catalin.marinas@....com,
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Cc: linux-arm-kernel@...ts.infradead.org,
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	Yeoreum Yun <yeoreum.yun@....com>
Subject: [PATCH 08/11] KVM: arm64: initialise SCTLR2_EL1 at __kvm_host_psci_cpu_entry()

initialise SCTLR2_EL1 at __kvm_host_psci_cpu_entry().

Signed-off-by: Yeoreum Yun <yeoreum.yun@....com>
---
 arch/arm64/kvm/hyp/nvhe/psci-relay.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm64/kvm/hyp/nvhe/psci-relay.c b/arch/arm64/kvm/hyp/nvhe/psci-relay.c
index c3e196fb8b18..4ed4b7fa57c2 100644
--- a/arch/arm64/kvm/hyp/nvhe/psci-relay.c
+++ b/arch/arm64/kvm/hyp/nvhe/psci-relay.c
@@ -4,6 +4,7 @@
  * Author: David Brazdil <dbrazdil@...gle.com>
  */

+#include <asm/alternative.h>
 #include <asm/kvm_asm.h>
 #include <asm/kvm_hyp.h>
 #include <asm/kvm_mmu.h>
@@ -219,6 +220,8 @@ asmlinkage void __noreturn __kvm_host_psci_cpu_entry(bool is_cpu_on)
 		release_boot_args(boot_args);

 	write_sysreg_el1(INIT_SCTLR_EL1_MMU_OFF, SYS_SCTLR);
+	if (alternative_has_cap_unlikely(ARM64_HAS_SCTLR2))
+		write_sysreg_el1(INIT_SCTLR2_EL1, SYS_SCTLR2);
 	write_sysreg(INIT_PSTATE_EL1, SPSR_EL2);

 	__host_enter(host_ctxt);
--
LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7}