linux-kernel - [PATCH v1 1/6] x86/fpu: Introduce new fpu state for Intel processor trace

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Message-Id: <1557995114-21629-2-git-send-email-luwei.kang@intel.com>
Date:   Thu, 16 May 2019 16:25:09 +0800
From:   Luwei Kang <luwei.kang@...el.com>
To:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:     tglx@...utronix.de, mingo@...hat.com, bp@...en8.de, hpa@...or.com,
        x86@...nel.org, pbonzini@...hat.com, rkrcmar@...hat.com,
        Luwei Kang <luwei.kang@...el.com>
Subject: [PATCH v1 1/6] x86/fpu: Introduce new fpu state for Intel processor trace

Introduce new fpu state structure pt_state to save Intel
processor trace configuration. The upcoming using
XSAVES/XRSTORS to switch the Intel PT configuration
on VM-Entry/Exit will use this structure.

Signed-off-by: Luwei Kang <luwei.kang@...el.com>
---
 arch/x86/include/asm/fpu/types.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/x86/include/asm/fpu/types.h b/arch/x86/include/asm/fpu/types.h
index 2e32e17..8cbb42e 100644
--- a/arch/x86/include/asm/fpu/types.h
+++ b/arch/x86/include/asm/fpu/types.h
@@ -221,6 +221,19 @@ struct avx_512_hi16_state {
 } __packed;
 
 /*
+ * State component 8 is used for some 64-bit registers
+ * of Intel processor trace.
+ */
+struct pt_state {
+	u64 rtit_ctl;
+	u64 rtit_output_base;
+	u64 rtit_output_mask;
+	u64 rtit_status;
+	u64 rtit_cr3_match;
+	u64 rtit_addrx_ab[0];
+} __packed;
+
+/*
  * State component 9: 32-bit PKRU register.  The state is
  * 8 bytes long but only 4 bytes is used currently.
  */
-- 
1.8.3.1