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Add support for the 'gfx' and 'current' vga options, ignore the 'keep' option, and print a warning message about other options not being currently implemented. Note that the multboot2 command line string must always be zero-terminated according to the multiboot2 specification, and hence there's no need to pass the string size to efi_multiboot2(). Signed-off-by: Roger Pau Monn=C3=A9 Reviewed-by: Jan Beulich --- Changes since v3: - s/last/cur/ - asm style fixes. - Add note about cmdline always being 0 terminated. - Also allow \t as valid option separator (as space). - Expand comment about expected get_option() behavior. - Always check for valid option terminator. Changes since v2: - Do not parse console=3D. - Allow width or height to be 0 as long as the gfx- option is well formed. Changes since v1: - Do not return the last occurrence of a command line. - Rearrange the code for assembly processing of the cmdline and use lea. - Merge patches handling console=3D and vga=3D together. --- xen/arch/x86/boot/head.S | 13 +++++- xen/arch/x86/efi/efi-boot.h | 74 ++++++++++++++++++++++++++++++- xen/arch/x86/x86_64/asm-offsets.c | 1 + 3 files changed, 84 insertions(+), 4 deletions(-) diff --git a/xen/arch/x86/boot/head.S b/xen/arch/x86/boot/head.S index e03f52c75535..1eb829ab419f 100644 --- a/xen/arch/x86/boot/head.S +++ b/xen/arch/x86/boot/head.S @@ -237,9 +237,10 @@ __efi64_mb2_start: jmp x86_32_switch =20 .Lefi_multiboot2_proto: - /* Zero EFI SystemTable and EFI ImageHandle addresses. */ + /* Zero EFI SystemTable, EFI ImageHandle addresses and cmdline. */ xor %esi,%esi xor %edi,%edi + xor %edx,%edx =20 /* Skip Multiboot2 information fixed part. */ lea (MB2_fixed_sizeof+MULTIBOOT2_TAG_ALIGN-1)(%rbx),%ecx @@ -277,6 +278,13 @@ __efi64_mb2_start: cmove MB2_efi64_ih(%rcx),%rdi je .Lefi_mb2_next_tag =20 + /* Get command line from Multiboot2 information. */ + cmpl $MULTIBOOT2_TAG_TYPE_CMDLINE, MB2_tag_type(%rcx) + jne .Lno_cmdline + lea MB2_tag_string(%rcx), %rdx + jmp .Lefi_mb2_next_tag +.Lno_cmdline: + /* Is it the end of Multiboot2 information? */ cmpl $MULTIBOOT2_TAG_TYPE_END,MB2_tag_type(%rcx) je .Lrun_bs @@ -340,7 +348,8 @@ __efi64_mb2_start: =20 /* * efi_multiboot2() is called according to System V AMD64 ABI: - * - IN: %rdi - EFI ImageHandle, %rsi - EFI SystemTable. + * - IN: %rdi - EFI ImageHandle, %rsi - EFI SystemTable, + * %rdx - MB2 cmdline */ call efi_multiboot2 =20 diff --git a/xen/arch/x86/efi/efi-boot.h b/xen/arch/x86/efi/efi-boot.h index 64c1a02cf10a..4394c7276aa3 100644 --- a/xen/arch/x86/efi/efi-boot.h +++ b/xen/arch/x86/efi/efi-boot.h @@ -795,7 +795,30 @@ static bool __init efi_arch_use_config_file(EFI_SYSTEM= _TABLE *SystemTable) =20 static void __init efi_arch_flush_dcache_area(const void *vaddr, UINTN siz= e) { } =20 -void __init efi_multiboot2(EFI_HANDLE ImageHandle, EFI_SYSTEM_TABLE *Syste= mTable) +/* Return a pointer to the character after the first occurrence of opt in = cmd */ +static const char __init *get_option(const char *cmd, const char *opt) +{ + const char *s =3D cmd, *o =3D NULL; + + if ( !cmd || !opt ) + return NULL; + + while ( (s =3D strstr(s, opt)) !=3D NULL ) + { + if ( s =3D=3D cmd || *(s - 1) =3D=3D ' ' || *(s - 1) =3D=3D '\t' ) + { + o =3D s + strlen(opt); + break; + } + + s +=3D strlen(opt); + } + + return o; +} + +void __init efi_multiboot2(EFI_HANDLE ImageHandle, EFI_SYSTEM_TABLE *Syste= mTable, + const char *cmdline) { EFI_GRAPHICS_OUTPUT_PROTOCOL *gop; EFI_HANDLE gop_handle; @@ -816,7 +839,54 @@ void __init efi_multiboot2(EFI_HANDLE ImageHandle, EFI= _SYSTEM_TABLE *SystemTable =20 if ( gop ) { - gop_mode =3D efi_find_gop_mode(gop, 0, 0, 0); + const char *cur =3D cmdline; + unsigned int width =3D 0, height =3D 0, depth =3D 0; + bool keep_current =3D false; + + while ( (cur =3D get_option(cur, "vga=3D")) !=3D NULL ) + { +#define VALID_TERMINATOR(c) \ + (*(c) =3D=3D ' ' || *(c) =3D=3D '\t' || *(c) =3D=3D '\0' || *(c) =3D= =3D ',') + if ( !strncmp(cur, "gfx-", 4) ) + { + width =3D simple_strtoul(cur + 4, &cur, 10); + + if ( *cur =3D=3D 'x' ) + height =3D simple_strtoul(cur + 1, &cur, 10); + else + goto error; + + if ( *cur =3D=3D 'x' ) + depth =3D simple_strtoul(cur + 1, &cur, 10); + else + goto error; + + if ( !VALID_TERMINATOR(cur) ) + { +error: + PrintStr(L"Warning: Invalid gfx- option detected.\r\n"= ); + width =3D height =3D depth =3D 0; + } + keep_current =3D false; + } + else if ( !strncmp(cur, "current", 7) && VALID_TERMINATOR(cur = + 7) ) + keep_current =3D true; + else if ( !strncmp(cur, "keep", 4) && VALID_TERMINATOR(cur + 4= ) ) + { + /* Ignore, handled in later vga=3D parsing. */ + } + else + { + /* Fallback to defaults if unimplemented. */ + width =3D height =3D depth =3D 0; + keep_current =3D false; + PrintStr(L"Warning: Cannot use selected vga option.\r\n"); + } +#undef VALID_TERMINATOR + } + + if ( !keep_current ) + gop_mode =3D efi_find_gop_mode(gop, width, height, depth); =20 efi_arch_edid(gop_handle); } diff --git a/xen/arch/x86/x86_64/asm-offsets.c b/xen/arch/x86/x86_64/asm-of= fsets.c index 287dac101ad4..fbd6c54188db 100644 --- a/xen/arch/x86/x86_64/asm-offsets.c +++ b/xen/arch/x86/x86_64/asm-offsets.c @@ -175,6 +175,7 @@ void __dummy__(void) OFFSET(MB2_mem_lower, multiboot2_tag_basic_meminfo_t, mem_lower); OFFSET(MB2_efi64_st, multiboot2_tag_efi64_t, pointer); OFFSET(MB2_efi64_ih, multiboot2_tag_efi64_ih_t, pointer); + OFFSET(MB2_tag_string, multiboot2_tag_string_t, string); BLANK(); =20 OFFSET(DOMAIN_vm_assist, struct domain, vm_assist); --=20 2.41.0 From nobody Fri May 17 07:47:11 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=pass(p=reject dis=none) header.from=citrix.com ARC-Seal: i=1; a=rsa-sha256; t=1688557710; cv=none; d=zohomail.com; s=zohoarc; b=bu4Grv/khEMFl2vvZlPQVOEAMnYaheYTx+GFqWityJoNB9fAIsvqYyhyiojCCNcpkQaclxZ+9A1rjZmu9ME5ehT7Crsmn2y84ZiCrb27C7+qWKLcsIixJISILLZZmCq7/CJQS/bzXLYGdunxTmumQeaNvuD4BbOszzS+8Nx2sfw= ARC-Message-Signature: i=1; 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This avoids forcefully switching StdOut to the maximum supported resolution, and thus very likely changing the GOP mode without having first parsed the command line options. Signed-off-by: Roger Pau Monn=C3=A9 Reviewed-by: Jan Beulich --- Changes since v2: - Use approach suggested by Jan. Changes since v1: - New in this version. --- xen/arch/x86/efi/efi-boot.h | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/xen/arch/x86/efi/efi-boot.h b/xen/arch/x86/efi/efi-boot.h index 4394c7276aa3..a13a335d24a9 100644 --- a/xen/arch/x86/efi/efi-boot.h +++ b/xen/arch/x86/efi/efi-boot.h @@ -829,7 +829,13 @@ void __init efi_multiboot2(EFI_HANDLE ImageHandle, EFI= _SYSTEM_TABLE *SystemTable =20 efi_init(ImageHandle, SystemTable); =20 - efi_console_set_mode(); + if ( StdOut->QueryMode(StdOut, StdOut->Mode->Mode, + &cols, &rows) !=3D EFI_SUCCESS ) + /* + * If active StdOut mode is invalid init ConOut (StdOut) to the max + * supported size. + */ + efi_console_set_mode(); =20 if ( StdOut->QueryMode(StdOut, StdOut->Mode->Mode, &cols, &rows) =3D=3D EFI_SUCCESS ) --=20 2.41.0 From nobody Fri May 17 07:47:11 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; 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Note that it's not safe to parse just the last occurrence of the vga=3D option, as then a command line with `vga=3Dcurrent vga=3Dkeep` would result in current being ignored. Adjust the command line documentation to describe the new behavior. Signed-off-by: Roger Pau Monn=C3=A9 Reviewed-by: Jan Beulich --- Changes since v3: - Remove xen-command-line doc addition. - Set mode to 'ask' by default. Changes since v2: - New in this version. --- Build tested only, as I don't have a system that does legacy boot and has VGA output I can check. It's mostly encapsulating the current code inside of a while loop and adding an extra else if for the "ask" option, there's a lot of indentation changes. --- xen/arch/x86/boot/cmdline.c | 83 +++++++++++++++++++------------------ 1 file changed, 42 insertions(+), 41 deletions(-) diff --git a/xen/arch/x86/boot/cmdline.c b/xen/arch/x86/boot/cmdline.c index fc11c6d3c5c4..10dcc6142c85 100644 --- a/xen/arch/x86/boot/cmdline.c +++ b/xen/arch/x86/boot/cmdline.c @@ -277,59 +277,60 @@ static u16 rows2vmode(unsigned int rows) =20 static void vga_parse(const char *cmdline, early_boot_opts_t *ebo) { - const char *c; - unsigned int tmp, vesa_depth, vesa_height, vesa_width; - - c =3D find_opt(cmdline, "vga=3D", true); - - if ( !c ) - return; + const char *c =3D cmdline; =20 ebo->boot_vid_mode =3D ASK_VGA; =20 - if ( !strmaxcmp(c, "current", delim_chars_comma) ) - ebo->boot_vid_mode =3D VIDEO_CURRENT_MODE; - else if ( !strsubcmp(c, "text-80x") ) - { - c +=3D strlen("text-80x"); - ebo->boot_vid_mode =3D rows2vmode(strtoui(c, delim_chars_comma, NU= LL)); - } - else if ( !strsubcmp(c, "gfx-") ) + while ( (c =3D find_opt(c, "vga=3D", true)) !=3D NULL ) { - vesa_width =3D strtoui(c + strlen("gfx-"), "x", &c); + unsigned int tmp, vesa_depth, vesa_height, vesa_width; + + if ( !strmaxcmp(c, "current", delim_chars_comma) ) + ebo->boot_vid_mode =3D VIDEO_CURRENT_MODE; + else if ( !strsubcmp(c, "text-80x") ) + { + c +=3D strlen("text-80x"); + ebo->boot_vid_mode =3D rows2vmode(strtoui(c, delim_chars_comma= , NULL)); + } + else if ( !strsubcmp(c, "gfx-") ) + { + vesa_width =3D strtoui(c + strlen("gfx-"), "x", &c); =20 - if ( vesa_width > U16_MAX ) - return; + if ( vesa_width > U16_MAX ) + return; =20 - /* - * Increment c outside of strtoui() because otherwise some - * compiler may complain with following message: - * warning: operation on 'c' may be undefined. - */ - ++c; - vesa_height =3D strtoui(c, "x", &c); + /* + * Increment c outside of strtoui() because otherwise some + * compiler may complain with following message: + * warning: operation on 'c' may be undefined. + */ + ++c; + vesa_height =3D strtoui(c, "x", &c); =20 - if ( vesa_height > U16_MAX ) - return; + if ( vesa_height > U16_MAX ) + return; =20 - vesa_depth =3D strtoui(++c, delim_chars_comma, NULL); + vesa_depth =3D strtoui(++c, delim_chars_comma, NULL); =20 - if ( vesa_depth > U16_MAX ) - return; + if ( vesa_depth > U16_MAX ) + return; =20 - ebo->vesa_width =3D vesa_width; - ebo->vesa_height =3D vesa_height; - ebo->vesa_depth =3D vesa_depth; - ebo->boot_vid_mode =3D VIDEO_VESA_BY_SIZE; - } - else if ( !strsubcmp(c, "mode-") ) - { - tmp =3D strtoui(c + strlen("mode-"), delim_chars_comma, NULL); + ebo->vesa_width =3D vesa_width; + ebo->vesa_height =3D vesa_height; + ebo->vesa_depth =3D vesa_depth; + ebo->boot_vid_mode =3D VIDEO_VESA_BY_SIZE; + } + else if ( !strsubcmp(c, "mode-") ) + { + tmp =3D strtoui(c + strlen("mode-"), delim_chars_comma, NULL); =20 - if ( tmp > U16_MAX ) - return; + if ( tmp > U16_MAX ) + return; =20 - ebo->boot_vid_mode =3D tmp; + ebo->boot_vid_mode =3D tmp; + } + else if ( !strmaxcmp(c, "ask", delim_chars_comma) ) + ebo->boot_vid_mode =3D ASK_VGA; } } #endif --=20 2.41.0