From: Joerg Roedel <jroedel@suse.de>
To: Arvind Sankar <nivedita@alum.mit.edu>
Cc: x86@kernel.org, Borislav Petkov <bp@alien8.de>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 3/5] x86/boot/64: Show original faulting address in case of error
Date: Fri, 9 Oct 2020 16:42:15 +0200 [thread overview]
Message-ID: <20201009144215.GA3302@suse.de> (raw)
In-Reply-To: <20201008191623.2881677-4-nivedita@alum.mit.edu>
On Thu, Oct 08, 2020 at 03:16:21PM -0400, Arvind Sankar wrote:
> This makes the #PF handler print the original CR2 value in case of
> error, instead of after aligning to PMD_SIZE.
>
> Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
> ---
> arch/x86/boot/compressed/ident_map_64.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/arch/x86/boot/compressed/ident_map_64.c b/arch/x86/boot/compressed/ident_map_64.c
> index 063a60edcf99..fd957b2625e9 100644
> --- a/arch/x86/boot/compressed/ident_map_64.c
> +++ b/arch/x86/boot/compressed/ident_map_64.c
> @@ -327,9 +327,6 @@ void do_boot_page_fault(struct pt_regs *regs, unsigned long error_code)
>
> ghcb_fault = sev_es_check_ghcb_fault(address);
>
> - address &= PMD_MASK;
> - end = address + PMD_SIZE;
> -
> /*
> * Check for unexpected error codes. Unexpected are:
> * - Faults on present pages
> @@ -345,5 +342,8 @@ void do_boot_page_fault(struct pt_regs *regs, unsigned long error_code)
> * Error code is sane - now identity map the 2M region around
> * the faulting address.
> */
> + address &= PMD_MASK;
> + end = address + PMD_SIZE;
> +
> add_identity_map(address, end);
> }
Reviewed-by: Joerg Roedel <jroedel@suse.de>
next prev parent reply other threads:[~2020-10-09 14:42 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-08 19:16 [PATCH v2 0/5] Couple of bugfixes to sev-es series Arvind Sankar
2020-10-08 19:16 ` [PATCH v2 1/5] x86/boot: Initialize boot_params in startup code Arvind Sankar
2020-10-08 19:16 ` [PATCH v2 2/5] x86/boot: Split out command-line related declarations Arvind Sankar
2020-10-08 19:16 ` [PATCH v2 3/5] x86/boot/64: Show original faulting address in case of error Arvind Sankar
2020-10-09 14:42 ` Joerg Roedel [this message]
2020-10-08 19:16 ` [PATCH v2 4/5] x86/boot/64: Explicitly map boot_params and command line Arvind Sankar
2020-10-09 14:49 ` Joerg Roedel
2020-10-16 16:27 ` Borislav Petkov
2020-10-16 16:47 ` Arvind Sankar
2020-10-16 17:07 ` Borislav Petkov
2020-10-16 17:20 ` Arvind Sankar
2020-10-16 17:32 ` Borislav Petkov
2020-10-16 20:04 ` [PATCH v3 1/4] " Arvind Sankar
2020-10-16 20:04 ` [PATCH v3 2/4] x86/boot: Initialize boot_params in startup code Arvind Sankar
2020-10-16 20:04 ` [PATCH v3 3/4] x86/boot: Split out command-line related declarations Arvind Sankar
2020-10-16 20:04 ` [PATCH v3 4/4] x86/boot/64: Show original faulting address in case of error Arvind Sankar
2020-10-19 14:51 ` [PATCH v3 1/4] x86/boot/64: Explicitly map boot_params and command line Borislav Petkov
2020-10-19 17:12 ` Arvind Sankar
2020-10-19 17:31 ` Borislav Petkov
2020-10-19 19:44 ` [tip: x86/seves] " tip-bot2 for Arvind Sankar
2020-10-16 21:18 ` [PATCH v2 4/5] " Arvind Sankar
2020-10-16 21:23 ` Borislav Petkov
2020-10-08 19:16 ` [PATCH v2 5/5] x86/head/64: Disable stack protection for head$(BITS).o Arvind Sankar
2020-10-09 14:49 ` Joerg Roedel
2020-10-16 11:17 ` Borislav Petkov
2020-10-16 12:43 ` Arvind Sankar
2020-10-16 13:15 ` Borislav Petkov
2020-10-16 14:16 ` Arvind Sankar
2020-10-19 19:44 ` [tip: x86/seves] " tip-bot2 for Arvind Sankar
2020-10-10 19:11 ` [PATCH] x86/boot/64: Initialize 5-level paging variables earlier Arvind Sankar
2020-10-10 19:26 ` Arvind Sankar
2020-10-12 14:08 ` Kirill A. Shutemov
2020-10-12 15:35 ` Arvind Sankar
2020-10-13 8:11 ` Borislav Petkov
2020-10-13 8:20 ` Kirill A. Shutemov
2020-10-13 8:33 ` Borislav Petkov
2020-10-13 9:12 ` Kirill A. Shutemov
2020-10-13 9:46 ` Borislav Petkov
2020-10-15 13:52 ` Kirill A. Shutemov
2020-10-16 10:21 ` Borislav Petkov
2020-10-13 8:59 ` Joerg Roedel
2020-10-19 19:44 ` [tip: x86/seves] " tip-bot2 for Arvind Sankar
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