diff options
Diffstat (limited to 'system/xen/xsa/xsa303-0002-xen-arm32-entry-Fold-the-macro-SAVE_ALL-in-the-macro.patch')
| -rw-r--r-- | system/xen/xsa/xsa303-0002-xen-arm32-entry-Fold-the-macro-SAVE_ALL-in-the-macro.patch | 97 |
1 files changed, 0 insertions, 97 deletions
diff --git a/system/xen/xsa/xsa303-0002-xen-arm32-entry-Fold-the-macro-SAVE_ALL-in-the-macro.patch b/system/xen/xsa/xsa303-0002-xen-arm32-entry-Fold-the-macro-SAVE_ALL-in-the-macro.patch deleted file mode 100644 index 35f9c0475e..0000000000 --- a/system/xen/xsa/xsa303-0002-xen-arm32-entry-Fold-the-macro-SAVE_ALL-in-the-macro.patch +++ /dev/null @@ -1,97 +0,0 @@ -From be7379207c83fa74f8a6c22a8ea213f02714776f Mon Sep 17 00:00:00 2001 -From: Julien Grall <julien.grall@arm.com> -Date: Tue, 1 Oct 2019 13:15:48 +0100 -Subject: [PATCH 2/4] xen/arm32: entry: Fold the macro SAVE_ALL in the macro - vector - -Follow-up rework will require the macro vector to distinguish between -a trap from a guest vs while in the hypervisor. - -The macro SAVE_ALL already has code to distinguish between the two and -it is only called by the vector macro. So fold the former into the -latter. This will help to avoid duplicating the check. - -This is part of XSA-303. - -Reported-by: Julien Grall <Julien.Grall@arm.com> -Signed-off-by: Julien Grall <julien.grall@arm.com> -Reviewed-by: Stefano Stabellini <sstabellini@kernel.org> -Reviewed-by: Andre Przywara <andre.przywara@arm.com> ---- - xen/arch/arm/arm32/entry.S | 46 +++++++++++++++++++++++----------------------- - 1 file changed, 23 insertions(+), 23 deletions(-) - -diff --git a/xen/arch/arm/arm32/entry.S b/xen/arch/arm/arm32/entry.S -index 4a762e04f1..150cbc0b4b 100644 ---- a/xen/arch/arm/arm32/entry.S -+++ b/xen/arch/arm/arm32/entry.S -@@ -13,27 +13,6 @@ - #define RESTORE_BANKED(mode) \ - RESTORE_ONE_BANKED(SP_##mode) ; RESTORE_ONE_BANKED(LR_##mode) ; RESTORE_ONE_BANKED(SPSR_##mode) - --#define SAVE_ALL \ -- sub sp, #(UREGS_SP_usr - UREGS_sp); /* SP, LR, SPSR, PC */ \ -- push {r0-r12}; /* Save R0-R12 */ \ -- \ -- mrs r11, ELR_hyp; /* ELR_hyp is return address. */\ -- str r11, [sp, #UREGS_pc]; \ -- \ -- str lr, [sp, #UREGS_lr]; \ -- \ -- add r11, sp, #UREGS_kernel_sizeof+4; \ -- str r11, [sp, #UREGS_sp]; \ -- \ -- mrc CP32(r11, HSR); /* Save exception syndrome */ \ -- str r11, [sp, #UREGS_hsr]; \ -- \ -- mrs r11, SPSR_hyp; \ -- str r11, [sp, #UREGS_cpsr]; \ -- and r11, #PSR_MODE_MASK; \ -- cmp r11, #PSR_MODE_HYP; \ -- blne save_guest_regs -- - save_guest_regs: - #ifdef CONFIG_ARM32_HARDEN_BRANCH_PREDICTOR - /* -@@ -52,7 +31,7 @@ save_guest_regs: - ldr r11, =0xffffffff /* Clobber SP which is only valid for hypervisor frames. */ - str r11, [sp, #UREGS_sp] - SAVE_ONE_BANKED(SP_usr) -- /* LR_usr is the same physical register as lr and is saved in SAVE_ALL */ -+ /* LR_usr is the same physical register as lr and is saved by the caller */ - SAVE_BANKED(svc) - SAVE_BANKED(abt) - SAVE_BANKED(und) -@@ -131,7 +110,28 @@ skip_check: - * interrupts (Asynchronous Abort, IRQ, FIQ) to unmask. - */ - .macro vector trap, iflags -- SAVE_ALL -+ /* Save registers in the stack */ -+ sub sp, #(UREGS_SP_usr - UREGS_sp) /* SP, LR, SPSR, PC */ -+ push {r0-r12} /* Save R0-R12 */ -+ mrs r11, ELR_hyp /* ELR_hyp is return address */ -+ str r11, [sp, #UREGS_pc] -+ -+ str lr, [sp, #UREGS_lr] -+ -+ add r11, sp, #(UREGS_kernel_sizeof + 4) -+ -+ str r11, [sp, #UREGS_sp] -+ -+ mrc CP32(r11, HSR) /* Save exception syndrome */ -+ str r11, [sp, #UREGS_hsr] -+ -+ mrs r11, SPSR_hyp -+ str r11, [sp, #UREGS_cpsr] -+ and r11, #PSR_MODE_MASK -+ cmp r11, #PSR_MODE_HYP -+ blne save_guest_regs -+ -+ /* We are ready to handle the trap, setup the registers and jump. */ - cpsie \iflags - adr lr, return_from_trap - mov r0, sp --- -2.11.0 - |