From: WANG Rui <r@hev.cc>
To: Ard Biesheuvel <ardb@kernel.org>, Huacai Chen <chenhuacai@kernel.org>
Cc: Ilias Apalodimas <ilias.apalodimas@linaro.org>,
WANG Xuerui <kernel@xen0n.name>,
linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org,
loongarch@lists.linux.dev, WANG Rui <r@hev.cc>,
Huacai Chen <chenhuacai@loongson.cn>
Subject: [RESEND PATCH v2 1/2] efi/loongarch: Implement efi_cache_sync_image()
Date: Mon, 27 Apr 2026 16:47:20 +0800 [thread overview]
Message-ID: <20260427084721.40535-2-r@hev.cc> (raw)
In-Reply-To: <20260427084721.40535-1-r@hev.cc>
Provide a LoongArch implementation of efi_cache_sync_image() to ensure
instruction cache coherency after the kernel image is relocated.
Signed-off-by: WANG Rui <r@hev.cc>
Reviewed-by: Huacai Chen <chenhuacai@loongson.cn>
---
drivers/firmware/efi/libstub/loongarch.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/firmware/efi/libstub/loongarch.c b/drivers/firmware/efi/libstub/loongarch.c
index 9825f5218137..f7938d5c196a 100644
--- a/drivers/firmware/efi/libstub/loongarch.c
+++ b/drivers/firmware/efi/libstub/loongarch.c
@@ -18,6 +18,11 @@ efi_status_t check_platform_features(void)
return EFI_SUCCESS;
}
+void efi_cache_sync_image(unsigned long image_base, unsigned long alloc_size)
+{
+ asm volatile ("ibar 0" ::: "memory");
+}
+
struct exit_boot_struct {
efi_memory_desc_t *runtime_map;
int runtime_entry_count;
--
2.54.0
next prev parent reply other threads:[~2026-04-27 8:47 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-27 8:47 [RESEND PATCH v2 0/2] efi/libstub: Ensure instruction cache coherency after kernel relocation WANG Rui
2026-04-27 8:47 ` WANG Rui [this message]
2026-04-27 8:47 ` [RESEND PATCH v2 2/2] efi/libstub: Synchronize instruction cache " WANG Rui
2026-04-27 16:11 ` [RESEND PATCH v2 0/2] efi/libstub: Ensure instruction cache coherency " Ard Biesheuvel
2026-04-28 11:07 ` Ard Biesheuvel
2026-04-29 7:32 ` Huacai Chen
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