linux-kernel - [GIT PULL] x86 fixes

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Message-ID: <Zvj-zvhfI81nB2s5@gmail.com>
Date: Sun, 29 Sep 2024 09:16:30 +0200
From: Ingo Molnar <mingo@...nel.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org
Subject: [GIT PULL] x86 fixes

Linus,

Please pull the latest x86/urgent Git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-urgent-2024-09-29

   # HEAD: d1fb034b75a8a96fcb4bf01a7c0e1421eef833a3 x86/cpu: Add two Intel CPU model numbers

Fix TDX MMIO #VE fault handling, and add two new Intel model numbers
for "Pantherlake" and "Diamond Rapids".

 Thanks,

	Ingo

------------------>
Alexey Gladkov (Intel) (1):
      x86/tdx: Fix "in-kernel MMIO" check

Tony Luck (1):
      x86/cpu: Add two Intel CPU model numbers


 arch/x86/coco/tdx/tdx.c             | 6 ++++++
 arch/x86/include/asm/intel-family.h | 5 +++++
 2 files changed, 11 insertions(+)

diff --git a/arch/x86/coco/tdx/tdx.c b/arch/x86/coco/tdx/tdx.c
index da8b66dce0da..327c45c5013f 100644
--- a/arch/x86/coco/tdx/tdx.c
+++ b/arch/x86/coco/tdx/tdx.c
@@ -16,6 +16,7 @@
 #include <asm/insn-eval.h>
 #include <asm/pgtable.h>
 #include <asm/set_memory.h>
+#include <asm/traps.h>
 
 /* MMIO direction */
 #define EPT_READ	0
@@ -433,6 +434,11 @@ static int handle_mmio(struct pt_regs *regs, struct ve_info *ve)
 			return -EINVAL;
 	}
 
+	if (!fault_in_kernel_space(ve->gla)) {
+		WARN_ONCE(1, "Access to userspace address is not supported");
+		return -EINVAL;
+	}
+
 	/*
 	 * Reject EPT violation #VEs that split pages.
 	 *
diff --git a/arch/x86/include/asm/intel-family.h b/arch/x86/include/asm/intel-family.h
index f81a851c46dc..17d899da4650 100644
--- a/arch/x86/include/asm/intel-family.h
+++ b/arch/x86/include/asm/intel-family.h
@@ -191,6 +191,8 @@
 #define INTEL_FAM6_LUNARLAKE_M		0xBD
 #define INTEL_LUNARLAKE_M		IFM(6, 0xBD)
 
+#define INTEL_PANTHERLAKE_L		IFM(6, 0xCC)
+
 /* "Small Core" Processors (Atom/E-Core) */
 
 #define INTEL_FAM6_ATOM_BONNELL		0x1C /* Diamondville, Pineview */
@@ -257,4 +259,7 @@
 #define INTEL_FAM5_QUARK_X1000		0x09 /* Quark X1000 SoC */
 #define INTEL_QUARK_X1000		IFM(5, 0x09) /* Quark X1000 SoC */
 
+/* Family 19 */
+#define INTEL_PANTHERCOVE_X		IFM(19, 0x01) /* Diamond Rapids */
+
 #endif /* _ASM_X86_INTEL_FAMILY_H */