From: Nicholas Piggin <npiggin@gmail.com>
To: kvm-ppc@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org, Nicholas Piggin <npiggin@gmail.com>
Subject: [RFC PATCH 5/9] powerpc/64s: Remove EXSLB interrupt save area
Date: Tue, 2 Feb 2021 13:03:09 +1000 [thread overview]
Message-ID: <20210202030313.3509446-6-npiggin@gmail.com> (raw)
In-Reply-To: <20210202030313.3509446-1-npiggin@gmail.com>
SLB faults should not be taken while the PACA save areas are live, so
EXSLB is not be required.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
arch/powerpc/include/asm/paca.h | 3 +--
arch/powerpc/kernel/asm-offsets.c | 1 -
arch/powerpc/kernel/exceptions-64s.S | 5 -----
3 files changed, 1 insertion(+), 8 deletions(-)
diff --git a/arch/powerpc/include/asm/paca.h b/arch/powerpc/include/asm/paca.h
index 9454d29ff4b4..be0b00cb9fbb 100644
--- a/arch/powerpc/include/asm/paca.h
+++ b/arch/powerpc/include/asm/paca.h
@@ -108,8 +108,7 @@ struct paca_struct {
*/
/* used for most interrupts/exceptions */
u64 exgen[EX_SIZE] __attribute__((aligned(0x80)));
- u64 exslb[EX_SIZE]; /* used for SLB/segment table misses
- * on the linear mapping */
+
/* SLB related definitions */
u16 vmalloc_sllp;
u8 slb_cache_ptr;
diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c
index 489a22cf1a92..51302fb74d14 100644
--- a/arch/powerpc/kernel/asm-offsets.c
+++ b/arch/powerpc/kernel/asm-offsets.c
@@ -255,7 +255,6 @@ int main(void)
#endif /* CONFIG_PPC_MM_SLICES */
OFFSET(PACA_EXGEN, paca_struct, exgen);
OFFSET(PACA_EXMC, paca_struct, exmc);
- OFFSET(PACA_EXSLB, paca_struct, exslb);
OFFSET(PACA_EXNMI, paca_struct, exnmi);
#ifdef CONFIG_PPC_PSERIES
OFFSET(PACALPPACAPTR, paca_struct, lppaca_ptr);
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index e964ea5149e8..c893801eb1d5 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -1412,13 +1412,9 @@ ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_TYPE_RADIX)
* on user-handler data structures.
*
* KVM: Same as 0x300, DSLB must test for KVM guest.
- *
- * A dedicated save area EXSLB is used (XXX: but it actually need not be
- * these days, we could use EXGEN).
*/
INT_DEFINE_BEGIN(data_access_slb)
IVEC=0x380
- IAREA=PACA_EXSLB
IRECONCILE=0
IDAR=1
IKVM_REAL=1
@@ -1507,7 +1503,6 @@ ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_TYPE_RADIX)
*/
INT_DEFINE_BEGIN(instruction_access_slb)
IVEC=0x480
- IAREA=PACA_EXSLB
IRECONCILE=0
IISIDE=1
IDAR=1
--
2.23.0
next prev parent reply other threads:[~2021-02-02 3:13 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-02 3:03 [RFC PATCH 0/9] KVM: PPC: Book3S: C-ify the P9 entry/exit code Nicholas Piggin
2021-02-02 3:03 ` [RFC PATCH 1/9] KVM: PPC: Book3S 64: move KVM interrupt entry to a common entry point Nicholas Piggin
2021-02-05 21:28 ` Fabiano Rosas
2021-02-19 5:18 ` Daniel Axtens
2021-02-19 8:03 ` Nicholas Piggin
2021-02-02 3:03 ` [RFC PATCH 2/9] KVM: PPC: Book3S 64: Move GUEST_MODE_SKIP test into KVM Nicholas Piggin
2021-02-12 20:33 ` Fabiano Rosas
2021-02-19 7:53 ` Nicholas Piggin
2021-02-19 6:03 ` Daniel Axtens
2021-02-19 7:56 ` Nicholas Piggin
2021-02-02 3:03 ` [RFC PATCH 3/9] KVM: PPC: Book3S 64: add hcall interrupt handler Nicholas Piggin
2021-02-12 20:33 ` Fabiano Rosas
2021-02-02 3:03 ` [RFC PATCH 4/9] KVM: PPC: Book3S HV: Move hcall early register setup to KVM Nicholas Piggin
2021-02-02 3:03 ` Nicholas Piggin [this message]
2021-02-02 3:03 ` [RFC PATCH 6/9] KVM: PPC: Book3S HV: Move interrupt " Nicholas Piggin
2021-02-02 3:03 ` [RFC PATCH 7/9] KVM: PPC: Book3S HV: move bad_host_intr check to HV handler Nicholas Piggin
2021-02-02 3:03 ` [RFC PATCH 8/9] KVM: PPC: Book3S HV: Minimise hcall handler calling convention differences Nicholas Piggin
2021-02-02 3:03 ` [RFC PATCH 9/9] KVM: PPC: Book3S HV: Implement the rest of the P9 entry/exit handling in C Nicholas Piggin
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