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Peter Anvin" , Juergen Gross , "Peter Zijlstra (Intel)" , Joerg Roedel Subject: [PATCH V3 37/49] x86/entry: Add a C macro to define the function body for IST in .entry.text Date: Thu, 14 Oct 2021 11:50:14 +0800 Message-Id: <20211014035027.17681-2-jiangshanlai@gmail.com> X-Mailer: git-send-email 2.19.1.6.gb485710b In-Reply-To: <20211014031413.14471-1-jiangshanlai@gmail.com> References: <20211014031413.14471-1-jiangshanlai@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Lai Jiangshan Add DEFINE_IDTENTRY_IST_ETNRY() macro to define C code to implement the ASM code which calls paranoid_entry(), cfunc(), paranoid_exit() in series for IST exceptions without error code. Not functional difference intended. Signed-off-by: Lai Jiangshan --- arch/x86/include/asm/idtentry.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/x86/include/asm/idtentry.h b/arch/x86/include/asm/idtentry.h index cf41901227ed..0f615943a460 100644 --- a/arch/x86/include/asm/idtentry.h +++ b/arch/x86/include/asm/idtentry.h @@ -337,6 +337,20 @@ void ist_paranoid_exit(unsigned long cr3, unsigned long gsbase); __visible noinstr void kernel_##func(struct pt_regs *regs, unsigned long error_code); \ __visible noinstr void user_##func(struct pt_regs *regs, unsigned long error_code) +/** + * DEFINE_IDTENTRY_IST_ENTRY - Emit __entry_text code for IST entry points + * @func: Function name of the entry point + */ +#define DEFINE_IDTENTRY_IST_ETNRY(func) \ +__visible __entry_text void ist_##func(struct pt_regs *regs) \ +{ \ + unsigned long cr3, gsbase; \ + \ + ist_paranoid_entry(&cr3, &gsbase); \ + func(regs); \ + ist_paranoid_exit(cr3, gsbase); \ +} + /** * DEFINE_IDTENTRY_IST - Emit code for IST entry points * @func: Function name of the entry point -- 2.19.1.6.gb485710b