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arm64: Rename the VHE switch to "finalise_el2"
as we are about to perform a lot more in 'mutate_to_vhe' than we currently do, this function really becomes the point where we finalise the basic EL2 configuration. Reflect this into the code by renaming a bunch of things: - HVC_VHE_RESTART -> HVC_FINALISE_EL2 - switch_to_vhe --> finalise_el2 - mutate_to_vhe -> __finalise_el2 No functional changes. Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20220630160500.1536744-2-maz@kernel.org Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Marc Zyngier
Will Deacon
parent
0aaa68532e
commit
7ddb0c3df7
5 changed files with 22 additions and 22 deletions
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@ -60,12 +60,13 @@ these functions (see arch/arm{,64}/include/asm/virt.h):
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* ::
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x0 = HVC_VHE_RESTART (arm64 only)
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x0 = HVC_FINALISE_EL2 (arm64 only)
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Attempt to upgrade the kernel's exception level from EL1 to EL2 by enabling
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the VHE mode. This is conditioned by the CPU supporting VHE, the EL2 MMU
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being off, and VHE not being disabled by any other means (command line
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option, for example).
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Finish configuring EL2 depending on the command-line options,
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including an attempt to upgrade the kernel's exception level from
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EL1 to EL2 by enabling the VHE mode. This is conditioned by the CPU
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supporting VHE, the EL2 MMU being off, and VHE not being disabled by
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any other means (command line option, for example).
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Any other value of r0/x0 triggers a hypervisor-specific handling,
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which is not documented here.
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@ -36,9 +36,9 @@
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#define HVC_RESET_VECTORS 2
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/*
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* HVC_VHE_RESTART - Upgrade the CPU from EL1 to EL2, if possible
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* HVC_FINALISE_EL2 - Upgrade the CPU from EL1 to EL2, if possible
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*/
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#define HVC_VHE_RESTART 3
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#define HVC_FINALISE_EL2 3
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/* Max number of HYP stub hypercalls */
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#define HVC_STUB_HCALL_NR 4
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@ -459,7 +459,7 @@ SYM_FUNC_START_LOCAL(__primary_switched)
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mov x0, x22 // pass FDT address in x0
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bl init_feature_override // Parse cpu feature overrides
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mov x0, x20
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bl switch_to_vhe // Prefer VHE if possible
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bl finalise_el2 // Prefer VHE if possible
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ldp x29, x30, [sp], #16
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bl start_kernel
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ASM_BUG()
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@ -542,7 +542,7 @@ SYM_INNER_LABEL(init_el2, SYM_L_LOCAL)
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eret
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__cpu_stick_to_vhe:
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mov x0, #HVC_VHE_RESTART
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mov x0, #HVC_FINALISE_EL2
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hvc #0
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mov x0, #BOOT_CPU_MODE_EL2
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ret
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@ -592,7 +592,7 @@ SYM_FUNC_START_LOCAL(secondary_startup)
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* Common entry point for secondary CPUs.
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*/
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mov x20, x0 // preserve boot mode
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bl switch_to_vhe
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bl finalise_el2
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bl __cpu_secondary_check52bitva
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#if VA_BITS > 48
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ldr_l x0, vabits_actual
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@ -51,8 +51,8 @@ SYM_CODE_START_LOCAL(elx_sync)
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msr vbar_el2, x1
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b 9f
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1: cmp x0, #HVC_VHE_RESTART
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b.eq mutate_to_vhe
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1: cmp x0, #HVC_FINALISE_EL2
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b.eq __finalise_el2
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2: cmp x0, #HVC_SOFT_RESTART
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b.ne 3f
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@ -73,8 +73,8 @@ SYM_CODE_START_LOCAL(elx_sync)
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eret
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SYM_CODE_END(elx_sync)
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// nVHE? No way! Give me the real thing!
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SYM_CODE_START_LOCAL(mutate_to_vhe)
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SYM_CODE_START_LOCAL(__finalise_el2)
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// nVHE? No way! Give me the real thing!
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// Sanity check: MMU *must* be off
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mrs x1, sctlr_el2
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tbnz x1, #0, 1f
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@ -140,10 +140,10 @@ SYM_CODE_START_LOCAL(mutate_to_vhe)
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msr spsr_el1, x0
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b enter_vhe
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SYM_CODE_END(mutate_to_vhe)
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SYM_CODE_END(__finalise_el2)
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// At the point where we reach enter_vhe(), we run with
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// the MMU off (which is enforced by mutate_to_vhe()).
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// the MMU off (which is enforced by __finalise_el2()).
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// We thus need to be in the idmap, or everything will
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// explode when enabling the MMU.
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@ -222,11 +222,11 @@ SYM_FUNC_START(__hyp_reset_vectors)
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SYM_FUNC_END(__hyp_reset_vectors)
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/*
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* Entry point to switch to VHE if deemed capable
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* Entry point to finalise EL2 and switch to VHE if deemed capable
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*
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* w0: boot mode, as returned by init_kernel_el()
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*/
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SYM_FUNC_START(switch_to_vhe)
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SYM_FUNC_START(finalise_el2)
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// Need to have booted at EL2
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cmp w0, #BOOT_CPU_MODE_EL2
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b.ne 1f
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@ -236,9 +236,8 @@ SYM_FUNC_START(switch_to_vhe)
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cmp x0, #CurrentEL_EL1
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b.ne 1f
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// Turn the world upside down
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mov x0, #HVC_VHE_RESTART
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mov x0, #HVC_FINALISE_EL2
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hvc #0
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1:
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ret
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SYM_FUNC_END(switch_to_vhe)
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SYM_FUNC_END(finalise_el2)
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@ -100,7 +100,7 @@ SYM_FUNC_END(__cpu_suspend_enter)
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.pushsection ".idmap.text", "awx"
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SYM_CODE_START(cpu_resume)
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bl init_kernel_el
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bl switch_to_vhe
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bl finalise_el2
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bl __cpu_setup
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/* enable the MMU early - so we can access sleep_save_stash by va */
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adrp x1, swapper_pg_dir
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