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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [PATCH v3 4/9] xen/arm64: head: Add missing code symbol annotations
On Sat, May 4, 2024 at 1:56 AM Stefano Stabellini
<sstabellini@xxxxxxxxxx> wrote:
>
> On Wed, 1 May 2024, Edgar E. Iglesias wrote:
> > From: "Edgar E. Iglesias" <edgar.iglesias@xxxxxxx>
> >
> > Use the generic xen/linkage.h macros to annotate code symbols
> > and add missing annotations.
> >
> > Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xxxxxxx>
> > ---
> > xen/arch/arm/arm64/head.S | 50 ++++++++++++++++++++-------------------
> > 1 file changed, 26 insertions(+), 24 deletions(-)
> >
> > diff --git a/xen/arch/arm/arm64/head.S b/xen/arch/arm/arm64/head.S
> > index fb297e9eb5..7acedb4f8f 100644
> > --- a/xen/arch/arm/arm64/head.S
> > +++ b/xen/arch/arm/arm64/head.S
> > @@ -90,7 +90,7 @@
> > * 4K-aligned address.
> > */
> >
> > -GLOBAL(start)
> > +FUNC(start)
> > /*
> > * DO NOT MODIFY. Image header expected by Linux boot-loaders.
> > */
> > @@ -102,6 +102,7 @@ efi_head:
> > */
> > add x13, x18, #0x16
> > b real_start /* branch to kernel start */
> > +END(start)
> > .quad 0 /* Image load offset from start of
> > RAM */
> > .quad _end - start /* Effective size of kernel image,
> > little-endian */
> > .quad __HEAD_FLAGS /* Informative flags, little-endian */
> > @@ -223,7 +224,7 @@ section_table:
> > .align 5
> > #endif /* CONFIG_ARM_EFI */
> >
> > -real_start:
> > +FUNC_LOCAL(real_start)
> > /* BSS should be zeroed when booting without EFI */
> > mov x26, #0 /* x26 := skip_zero_bss */
> >
> > @@ -263,9 +264,9 @@ primary_switched:
> > mov x1, x21 /* x1 := paddr(FDT) */
> > ldr x2, =start_xen
> > b launch
> > -ENDPROC(real_start)
> > +END(real_start)
> >
> > -GLOBAL(init_secondary)
> > +FUNC(init_secondary)
> > msr DAIFSet, 0xf /* Disable all interrupts */
> >
> > /* Find out where we are */
> > @@ -304,7 +305,7 @@ secondary_switched:
> > /* Jump to C world */
> > ldr x2, =start_secondary
> > b launch
> > -ENDPROC(init_secondary)
> > +END(init_secondary)
> >
> > /*
> > * Check if the CPU has been booted in Hypervisor mode.
> > @@ -313,7 +314,7 @@ ENDPROC(init_secondary)
> > *
> > * Clobbers x0 - x5
> > */
> > -check_cpu_mode:
> > +FUNC_LOCAL(check_cpu_mode)
> > PRINT_ID("- Current EL ")
> > mrs x5, CurrentEL
> > print_reg x5
> > @@ -329,7 +330,7 @@ check_cpu_mode:
> > PRINT_ID("- Xen must be entered in NS EL2 mode -\r\n")
> > PRINT_ID("- Please update the bootloader -\r\n")
> > b fail
> > -ENDPROC(check_cpu_mode)
> > +END(check_cpu_mode)
> >
> > /*
> > * Zero BSS
> > @@ -339,7 +340,7 @@ ENDPROC(check_cpu_mode)
> > *
> > * Clobbers x0 - x3
> > */
> > -zero_bss:
> > +FUNC_LOCAL(zero_bss)
> > /* Zero BSS only when requested */
> > cbnz x26, skip_bss
> >
> > @@ -353,14 +354,14 @@ zero_bss:
> >
> > skip_bss:
> > ret
> > -ENDPROC(zero_bss)
> > +END(zero_bss)
> >
> > /*
> > * Initialize the processor for turning the MMU on.
> > *
> > * Clobbers x0 - x3
> > */
> > -cpu_init:
> > +FUNC_LOCAL(cpu_init)
> > PRINT_ID("- Initialize CPU -\r\n")
> >
> > /* Set up memory attribute type tables */
> > @@ -399,7 +400,7 @@ cpu_init:
> > */
> > msr spsel, #1
> > ret
> > -ENDPROC(cpu_init)
> > +END(cpu_init)
> >
> > /*
> > * Setup the initial stack and jump to the C world
> > @@ -411,7 +412,7 @@ ENDPROC(cpu_init)
> > *
> > * Clobbers x3
> > */
> > -launch:
> > +FUNC_LOCAL(launch)
> > ldr x3, =init_data
> > add x3, x3, #INITINFO_stack /* Find the boot-time stack */
> > ldr x3, [x3]
> > @@ -421,13 +422,13 @@ launch:
> >
> > /* Jump to C world */
> > br x2
> > -ENDPROC(launch)
> > +END(launch)
> >
> > /* Fail-stop */
> > -fail: PRINT_ID("- Boot failed -\r\n")
> > +FUNC_LOCAL(fail) PRINT_ID("- Boot failed -\r\n")
>
> Maybe we should move PRINT_ID to a newline?
> I am not sure FUNC_LOCAL supports having a command on the same line.
Thanks, yes I checked that it works but it feels a little fragile so
in v4 I'll move the print to a new line (here and in mmu/head.S).
Thanks,
Edgar
>
>
>
> > 1: wfe
> > b 1b
> > -ENDPROC(fail)
> > +END(fail)
> >
> > #ifdef CONFIG_EARLY_PRINTK
> > /*
> > @@ -438,14 +439,14 @@ ENDPROC(fail)
> > *
> > * Clobbers x0 - x1
> > */
> > -init_uart:
> > +FUNC_LOCAL(init_uart)
> > ldr x23, =CONFIG_EARLY_UART_BASE_ADDRESS
> > #ifdef CONFIG_EARLY_UART_INIT
> > early_uart_init x23, 0
> > #endif
> > PRINT("- UART enabled -\r\n")
> > ret
> > -ENDPROC(init_uart)
> > +END(init_uart)
> >
> > /*
> > * Print early debug messages.
> > @@ -454,7 +455,7 @@ ENDPROC(init_uart)
> > * x23: Early UART base address
> > * Clobbers x0-x1
> > */
> > -ENTRY(asm_puts)
> > +FUNC(asm_puts)
> > early_uart_ready x23, 1
> > ldrb w1, [x0], #1 /* Load next char */
> > cbz w1, 1f /* Exit on nul */
> > @@ -462,7 +463,7 @@ ENTRY(asm_puts)
> > b asm_puts
> > 1:
> > ret
> > -ENDPROC(asm_puts)
> > +END(asm_puts)
> >
> > /*
> > * Print a 64-bit number in hex.
> > @@ -471,7 +472,7 @@ ENDPROC(asm_puts)
> > * x23: Early UART base address
> > * Clobbers x0-x3
> > */
> > -ENTRY(asm_putn)
> > +FUNC(asm_putn)
> > adr_l x1, hex
> > mov x3, #16
> > 1:
> > @@ -484,7 +485,7 @@ ENTRY(asm_putn)
> > subs x3, x3, #1
> > b.ne 1b
> > ret
> > -ENDPROC(asm_putn)
> > +END(asm_putn)
> >
> > RODATA_SECT(.rodata.idmap, hex, "0123456789abcdef")
> >
> > @@ -493,16 +494,17 @@ RODATA_SECT(.rodata.idmap, hex, "0123456789abcdef")
> > /* This provides a C-API version of __lookup_processor_type
> > * TODO: For now, the implementation return NULL every time
> > */
> > -ENTRY(lookup_processor_type)
> > +FUNC(lookup_processor_type)
> > mov x0, #0
> > ret
> > +END(lookup_processor_type)
> >
> > #ifdef CONFIG_ARM_EFI
> > /*
> > * Function to transition from EFI loader in C, to Xen entry point.
> > * void noreturn efi_xen_start(void *fdt_ptr, uint32_t fdt_size);
> > */
> > -ENTRY(efi_xen_start)
> > +FUNC(efi_xen_start)
> > /*
> > * Preserve x0 (fdt pointer) across call to __flush_dcache_area,
> > * restore for entry into Xen.
> > @@ -554,7 +556,7 @@ ENTRY(efi_xen_start)
> > mov x26, #1 /* x26 := skip_zero_bss */
> >
> > b real_start_efi
> > -ENDPROC(efi_xen_start)
> > +END(efi_xen_start)
> >
> > #endif /* CONFIG_ARM_EFI */
> >
> > --
> > 2.40.1
> >
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