[PATCH v2 14/17] arm64: Add an aliasing facility for the idreg override
From: Marc Zyngier <maz@kernel.org>
Date: 2021-01-04 14:21:44
Also in:
kvmarm
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
In order to map the override of idregs to options that a user can easily understand, let's introduce yet another option array, which maps an option to the corresponding idreg options. Signed-off-by: Marc Zyngier <maz@kernel.org> --- arch/arm64/kernel/idreg-override.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+)
diff --git a/arch/arm64/kernel/idreg-override.c b/arch/arm64/kernel/idreg-override.c
index 75d9845f489b..16bc8b3b93ae 100644
--- a/arch/arm64/kernel/idreg-override.c
+++ b/arch/arm64/kernel/idreg-override.c@@ -37,6 +37,12 @@ static const struct reg_desc * const regs[] __initdata = { &mmfr1, }; +static const struct { + const char * const alias; + const char * const feature; +} aliases[] __initdata = { +}; + static int __init find_field(const char *cmdline, const struct reg_desc *reg, int f, u64 *v) {
@@ -80,6 +86,18 @@ static void __init match_options(const char *cmdline) } } +static __init void match_aliases(const char *cmdline) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(aliases); i++) { + char *str = strstr(cmdline, aliases[i].alias); + + if ((str == cmdline || (str > cmdline && *(str - 1) == ' '))) + match_options(aliases[i].feature); + } +} + static __init void parse_cmdline(void) { if (!IS_ENABLED(CONFIG_CMDLINE_FORCE)) {
@@ -100,6 +118,7 @@ static __init void parse_cmdline(void) goto out; match_options(prop); + match_aliases(prop); if (!IS_ENABLED(CONFIG_CMDLINE_EXTEND)) return;
@@ -107,6 +126,7 @@ static __init void parse_cmdline(void) out: match_options(CONFIG_CMDLINE); + match_aliases(CONFIG_CMDLINE); } void __init init_shadow_regs(void)
--
2.29.2
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