[PATCH v7 07/23] arm64: Move VHE-specific SPE setup to mutate_to_vhe()
From: Marc Zyngier <maz@kernel.org>
Date: 2021-02-08 10:09:47
Also in:
kvmarm, lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
There isn't much that a VHE kernel needs on top of whatever has been done for nVHE, so let's move the little we need to the VHE stub (the SPE setup), and drop the init_el2_state macro. No expected functional change. Signed-off-by: Marc Zyngier <maz@kernel.org> Acked-by: David Brazdil <redacted> Acked-by: Catalin Marinas <catalin.marinas@arm.com> --- arch/arm64/kernel/hyp-stub.S | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/arch/arm64/kernel/hyp-stub.S b/arch/arm64/kernel/hyp-stub.S
index 373ed2213e1d..6229315d533d 100644
--- a/arch/arm64/kernel/hyp-stub.S
+++ b/arch/arm64/kernel/hyp-stub.S@@ -92,9 +92,6 @@ SYM_CODE_START_LOCAL(mutate_to_vhe) msr hcr_el2, x0 isb - // Doesn't do much on VHE, but still, worth a shot - init_el2_state vhe - // Use the EL1 allocated stack, per-cpu offset mrs x0, sp_el1 mov sp, x0
@@ -107,6 +104,11 @@ SYM_CODE_START_LOCAL(mutate_to_vhe) mrs_s x0, SYS_VBAR_EL12 msr vbar_el1, x0 + // Use EL2 translations for SPE and disable access from EL1 + mrs x0, mdcr_el2 + bic x0, x0, #(MDCR_EL2_E2PB_MASK << MDCR_EL2_E2PB_SHIFT) + msr mdcr_el2, x0 + // Transfer the MM state from EL1 to EL2 mrs_s x0, SYS_TCR_EL12 msr tcr_el1, x0
--
2.29.2
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