linux-kernel - Re: [PATCH v3 6/6] s390/mm: Remove sev

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Message-ID: <87blxr47kn.fsf@morokweng.localdomain>
Date:   Thu, 18 Jul 2019 13:43:20 -0300
From:   Thiago Jung Bauermann <bauerman@...ux.ibm.com>
To:     Halil Pasic <pasic@...ux.ibm.com>
Cc:     Christoph Hellwig <hch@....de>, x86@...nel.org,
        iommu@...ts.linux-foundation.org, linux-fsdevel@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-s390@...r.kernel.org,
        linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        "Ingo Molnar" <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Robin Murphy <robin.murphy@....com>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Alexey Dobriyan <adobriyan@...il.com>,
        Thomas Lendacky <Thomas.Lendacky@....com>,
        Mike Anderson <andmike@...ux.ibm.com>,
        Ram Pai <linuxram@...ibm.com>
Subject: Re: [PATCH v3 6/6] s390/mm: Remove sev_active() function


Halil Pasic <pasic@...ux.ibm.com> writes:

> On Thu, 18 Jul 2019 10:44:56 +0200
> Christoph Hellwig <hch@....de> wrote:
>
>> > -/* are we a protected virtualization guest? */
>> > -bool sev_active(void)
>> > -{
>> > -	return is_prot_virt_guest();
>> > -}
>> > -
>> >  bool force_dma_unencrypted(struct device *dev)
>> >  {
>> > -	return sev_active();
>> > +	return is_prot_virt_guest();
>> >  }
>> 
>> Do we want to keep the comment for force_dma_unencrypted?
>
> Yes we do. With the comment transferred:
>
> Reviewed-by: Halil Pasic <pasic@...ux.ibm.com>

Thanks for your review.

Here is the new version. Should I send a new patch series with this
patch and the Reviewed-by on the other ones?

-- 
Thiago Jung Bauermann
IBM Linux Technology Center


>From 1726205c73fb9e29feaa3d8909c5a1b0f2054c04 Mon Sep 17 00:00:00 2001
From: Thiago Jung Bauermann <bauerman@...ux.ibm.com>
Date: Mon, 15 Jul 2019 20:50:43 -0300
Subject: [PATCH v4] s390/mm: Remove sev_active() function

All references to sev_active() were moved to arch/x86 so we don't need to
define it for s390 anymore.

Signed-off-by: Thiago Jung Bauermann <bauerman@...ux.ibm.com>
Reviewed-by: Christoph Hellwig <hch@....de>
Reviewed-by: Halil Pasic <pasic@...ux.ibm.com>
---
 arch/s390/include/asm/mem_encrypt.h | 1 -
 arch/s390/mm/init.c                 | 7 +------
 2 files changed, 1 insertion(+), 7 deletions(-)

diff --git a/arch/s390/include/asm/mem_encrypt.h b/arch/s390/include/asm/mem_encrypt.h
index ff813a56bc30..2542cbf7e2d1 100644
--- a/arch/s390/include/asm/mem_encrypt.h
+++ b/arch/s390/include/asm/mem_encrypt.h
@@ -5,7 +5,6 @@
 #ifndef __ASSEMBLY__
 
 static inline bool mem_encrypt_active(void) { return false; }
-extern bool sev_active(void);
 
 int set_memory_encrypted(unsigned long addr, int numpages);
 int set_memory_decrypted(unsigned long addr, int numpages);
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
index 78c319c5ce48..6c43a1ed1beb 100644
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c
@@ -156,14 +156,9 @@ int set_memory_decrypted(unsigned long addr, int numpages)
 }
 
 /* are we a protected virtualization guest? */
-bool sev_active(void)
-{
-	return is_prot_virt_guest();
-}
-
 bool force_dma_unencrypted(struct device *dev)
 {
-	return sev_active();
+	return is_prot_virt_guest();
 }
 
 /* protected virtualization */