From: "Huang, Kai" <kai.huang@intel.com>
To: "kexec@lists.infradead.org" <kexec@lists.infradead.org>,
"dwmw2@infradead.org" <dwmw2@infradead.org>
Cc: "dyoung@redhat.com" <dyoung@redhat.com>,
"bsz@amazon.de" <bsz@amazon.de>,
"x86@kernel.org" <x86@kernel.org>, "bp@alien8.de" <bp@alien8.de>,
"peterz@infradead.org" <peterz@infradead.org>,
"hpa@zytor.com" <hpa@zytor.com>,
"mingo@redhat.com" <mingo@redhat.com>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"kirill.shutemov@linux.intel.com"
<kirill.shutemov@linux.intel.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"horms@kernel.org" <horms@kernel.org>,
"dwmw@amazon.co.uk" <dwmw@amazon.co.uk>,
"dave.hansen@linux.intel.com" <dave.hansen@linux.intel.com>,
"jpoimboe@kernel.org" <jpoimboe@kernel.org>,
"nik.borisov@suse.com" <nik.borisov@suse.com>
Subject: Re: [PATCH v9 3/4] x86/kexec: Invalidate GDT/IDT from relocate_kernel() instead of earlier
Date: Tue, 1 Apr 2025 09:48:39 +0000 [thread overview]
Message-ID: <7e48a0ca808c9ec0520fe7769a4e44a86fbcedb6.camel@intel.com> (raw)
In-Reply-To: <20250326142404.256980-4-dwmw2@infradead.org>
On Wed, 2025-03-26 at 14:16 +0000, David Woodhouse wrote:
> From: David Woodhouse <dwmw@amazon.co.uk>
>
> Reduce the window during which exceptions are unhandled, by leaving the
> GDT/IDT in place all the way into the relocate_kernel() function, until
> the moment that %cr3 gets replaced.
Seems the difference is only couple of instructions. Anyway ...
>
> Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Kai Huang <kai.huang@intel.com>
next prev parent reply other threads:[~2025-04-01 9:48 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-26 14:16 [PATCH v9 0/4] x86/kexec: Add exception handling for relocate_kernel David Woodhouse
2025-03-26 14:16 ` [PATCH v9 1/4] x86/kexec: Add 8250 serial port output David Woodhouse
2025-04-10 11:13 ` [tip: x86/asm] " tip-bot2 for David Woodhouse
2025-03-26 14:16 ` [PATCH v9 2/4] x86/kexec: Add 8250 MMIO " David Woodhouse
2025-04-10 11:13 ` [tip: x86/asm] " tip-bot2 for David Woodhouse
2025-03-26 14:16 ` [PATCH v9 3/4] x86/kexec: Invalidate GDT/IDT from relocate_kernel() instead of earlier David Woodhouse
2025-04-01 9:48 ` Huang, Kai [this message]
2025-04-01 9:53 ` David Woodhouse
2025-04-10 11:12 ` [tip: x86/asm] " tip-bot2 for David Woodhouse
2025-03-26 14:16 ` [PATCH v9 4/4] selftests/kexec: Add x86_64 selftest for kexec-jump and exception handling David Woodhouse
2025-04-10 11:12 ` [tip: x86/asm] " tip-bot2 for David Woodhouse
2025-04-10 7:26 ` [PATCH v9 0/4] x86/kexec: Add exception handling for relocate_kernel David Woodhouse
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